Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1 | /* Compile an expression node to intermediate code */ |
| 2 | |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 3 | /* XXX TO DO: |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 4 | XXX add __doc__ attribute == co_doc to code object attributes? |
| 5 | XXX (it's currently the first item of the co_const tuple) |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 6 | XXX Generate simple jump for break/return outside 'try...finally' |
Jeremy Hylton | 3faa52e | 2001-02-01 22:48:12 +0000 | [diff] [blame] | 7 | XXX Allow 'continue' inside finally clause of try-finally |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 8 | XXX New opcode for loading the initial index for a for loop |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 9 | XXX other JAR tricks? |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 10 | */ |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 11 | |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 12 | #include "Python.h" |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 13 | |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 14 | #include "node.h" |
| 15 | #include "token.h" |
| 16 | #include "graminit.h" |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 17 | #include "compile.h" |
Jeremy Hylton | 4b38da6 | 2001-02-02 18:19:15 +0000 | [diff] [blame] | 18 | #include "symtable.h" |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 19 | #include "opcode.h" |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 20 | #include "structmember.h" |
| 21 | |
| 22 | #include <ctype.h> |
Guido van Rossum | 282914b | 1991-04-04 10:42:56 +0000 | [diff] [blame] | 23 | |
Guido van Rossum | b05a5c7 | 1997-05-07 17:46:13 +0000 | [diff] [blame] | 24 | /* Three symbols from graminit.h are also defined in Python.h, with |
| 25 | Py_ prefixes to their names. Python.h can't include graminit.h |
| 26 | (which defines too many confusing symbols), but we can check here |
| 27 | that they haven't changed (which is very unlikely, but possible). */ |
| 28 | #if Py_single_input != single_input |
Guido van Rossum | 2f75b29 | 1997-05-20 22:18:48 +0000 | [diff] [blame] | 29 | #error "single_input has changed -- update Py_single_input in Python.h" |
Guido van Rossum | b05a5c7 | 1997-05-07 17:46:13 +0000 | [diff] [blame] | 30 | #endif |
| 31 | #if Py_file_input != file_input |
Guido van Rossum | 2f75b29 | 1997-05-20 22:18:48 +0000 | [diff] [blame] | 32 | #error "file_input has changed -- update Py_file_input in Python.h" |
Guido van Rossum | b05a5c7 | 1997-05-07 17:46:13 +0000 | [diff] [blame] | 33 | #endif |
| 34 | #if Py_eval_input != eval_input |
Guido van Rossum | 2f75b29 | 1997-05-20 22:18:48 +0000 | [diff] [blame] | 35 | #error "eval_input has changed -- update Py_eval_input in Python.h" |
Guido van Rossum | b05a5c7 | 1997-05-07 17:46:13 +0000 | [diff] [blame] | 36 | #endif |
| 37 | |
Guido van Rossum | 8e793d9 | 1997-03-03 19:13:14 +0000 | [diff] [blame] | 38 | int Py_OptimizeFlag = 0; |
| 39 | |
Guido van Rossum | 8861b74 | 1996-07-30 16:49:37 +0000 | [diff] [blame] | 40 | #define OP_DELETE 0 |
| 41 | #define OP_ASSIGN 1 |
| 42 | #define OP_APPLY 2 |
| 43 | |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 44 | #define VAR_LOAD 0 |
| 45 | #define VAR_STORE 1 |
| 46 | #define VAR_DELETE 2 |
| 47 | |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 48 | #define DEL_CLOSURE_ERROR \ |
Jeremy Hylton | eab156f | 2001-01-30 01:24:43 +0000 | [diff] [blame] | 49 | "can not delete variable '%.400s' referenced in nested scope" |
| 50 | |
| 51 | #define DUPLICATE_ARGUMENT \ |
| 52 | "duplicate argument '%s' in function definition" |
| 53 | |
Jeremy Hylton | cb17ae8 | 2001-02-09 22:22:18 +0000 | [diff] [blame] | 54 | #define ILLEGAL_DYNAMIC_SCOPE \ |
| 55 | "%.100s: exec or 'import *' makes names ambiguous in nested scope" |
Jeremy Hylton | eab156f | 2001-01-30 01:24:43 +0000 | [diff] [blame] | 56 | |
Jeremy Hylton | 29906ee | 2001-02-27 04:23:34 +0000 | [diff] [blame] | 57 | #define GLOBAL_AFTER_ASSIGN \ |
| 58 | "name '%.400s' is assigned to before global declaration" |
| 59 | |
| 60 | #define GLOBAL_AFTER_USE \ |
| 61 | "name '%.400s' is used prior to global declaration" |
| 62 | |
Martin v. Löwis | dd7eb14 | 2003-10-18 22:05:25 +0000 | [diff] [blame] | 63 | #define PARAM_GLOBAL \ |
Neal Norwitz | 2a47c0f | 2002-01-29 00:53:41 +0000 | [diff] [blame] | 64 | "name '%.400s' is a function parameter and declared global" |
Jeremy Hylton | 29906ee | 2001-02-27 04:23:34 +0000 | [diff] [blame] | 65 | |
Jeremy Hylton | 39e2f3f | 2001-02-28 01:58:08 +0000 | [diff] [blame] | 66 | #define LATE_FUTURE \ |
| 67 | "from __future__ imports must occur at the beginning of the file" |
| 68 | |
Jeremy Hylton | 897b821 | 2001-03-23 14:08:38 +0000 | [diff] [blame] | 69 | #define ASSIGN_DEBUG \ |
| 70 | "can not assign to __debug__" |
| 71 | |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 72 | #define MANGLE_LEN 256 |
| 73 | |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 74 | #define OFF(x) offsetof(PyCodeObject, x) |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 75 | |
Guido van Rossum | 6f79937 | 2001-09-20 20:46:19 +0000 | [diff] [blame] | 76 | static PyMemberDef code_memberlist[] = { |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 77 | {"co_argcount", T_INT, OFF(co_argcount), READONLY}, |
| 78 | {"co_nlocals", T_INT, OFF(co_nlocals), READONLY}, |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 79 | {"co_stacksize",T_INT, OFF(co_stacksize), READONLY}, |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 80 | {"co_flags", T_INT, OFF(co_flags), READONLY}, |
Guido van Rossum | 39d942d | 1992-01-12 02:30:05 +0000 | [diff] [blame] | 81 | {"co_code", T_OBJECT, OFF(co_code), READONLY}, |
| 82 | {"co_consts", T_OBJECT, OFF(co_consts), READONLY}, |
| 83 | {"co_names", T_OBJECT, OFF(co_names), READONLY}, |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 84 | {"co_varnames", T_OBJECT, OFF(co_varnames), READONLY}, |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 85 | {"co_freevars", T_OBJECT, OFF(co_freevars), READONLY}, |
| 86 | {"co_cellvars", T_OBJECT, OFF(co_cellvars), READONLY}, |
Guido van Rossum | 39d942d | 1992-01-12 02:30:05 +0000 | [diff] [blame] | 87 | {"co_filename", T_OBJECT, OFF(co_filename), READONLY}, |
Guido van Rossum | 9bfef44 | 1993-03-29 10:43:31 +0000 | [diff] [blame] | 88 | {"co_name", T_OBJECT, OFF(co_name), READONLY}, |
Guido van Rossum | da4eb5c | 1997-01-24 03:43:35 +0000 | [diff] [blame] | 89 | {"co_firstlineno", T_INT, OFF(co_firstlineno), READONLY}, |
| 90 | {"co_lnotab", T_OBJECT, OFF(co_lnotab), READONLY}, |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 91 | {NULL} /* Sentinel */ |
| 92 | }; |
| 93 | |
Guido van Rossum | bea18cc | 2002-06-14 20:41:17 +0000 | [diff] [blame] | 94 | PyDoc_STRVAR(code_doc, |
| 95 | "code(argcount, nlocals, stacksize, flags, codestring, constants, names,\n\ |
| 96 | varnames, filename, name, firstlineno, lnotab[, freevars[, cellvars]])\n\ |
| 97 | \n\ |
| 98 | Create a code object. Not for the faint of heart."); |
| 99 | |
| 100 | static PyObject * |
| 101 | code_new(PyTypeObject *type, PyObject *args, PyObject *kw) |
| 102 | { |
| 103 | int argcount; |
| 104 | int nlocals; |
| 105 | int stacksize; |
| 106 | int flags; |
Raymond Hettinger | 37a724d | 2003-09-15 21:43:16 +0000 | [diff] [blame] | 107 | PyObject *co; |
Raymond Hettinger | cc1798e | 2003-09-16 04:27:52 +0000 | [diff] [blame] | 108 | PyObject *empty = NULL; |
Guido van Rossum | bea18cc | 2002-06-14 20:41:17 +0000 | [diff] [blame] | 109 | PyObject *code; |
| 110 | PyObject *consts; |
| 111 | PyObject *names; |
| 112 | PyObject *varnames; |
| 113 | PyObject *freevars = NULL; |
| 114 | PyObject *cellvars = NULL; |
| 115 | PyObject *filename; |
| 116 | PyObject *name; |
| 117 | int firstlineno; |
| 118 | PyObject *lnotab; |
| 119 | |
| 120 | if (!PyArg_ParseTuple(args, "iiiiSO!O!O!SSiS|O!O!:code", |
| 121 | &argcount, &nlocals, &stacksize, &flags, |
| 122 | &code, |
| 123 | &PyTuple_Type, &consts, |
| 124 | &PyTuple_Type, &names, |
| 125 | &PyTuple_Type, &varnames, |
| 126 | &filename, &name, |
| 127 | &firstlineno, &lnotab, |
| 128 | &PyTuple_Type, &freevars, |
| 129 | &PyTuple_Type, &cellvars)) |
| 130 | return NULL; |
| 131 | |
Guido van Rossum | bea18cc | 2002-06-14 20:41:17 +0000 | [diff] [blame] | 132 | if (!PyObject_CheckReadBuffer(code)) { |
| 133 | PyErr_SetString(PyExc_TypeError, |
| 134 | "bytecode object must be a single-segment read-only buffer"); |
| 135 | return NULL; |
| 136 | } |
| 137 | |
Raymond Hettinger | cc1798e | 2003-09-16 04:27:52 +0000 | [diff] [blame] | 138 | if (freevars == NULL || cellvars == NULL) { |
| 139 | empty = PyTuple_New(0); |
| 140 | if (empty == NULL) |
| 141 | return NULL; |
| 142 | if (freevars == NULL) |
| 143 | freevars = empty; |
| 144 | if (cellvars == NULL) |
| 145 | cellvars = empty; |
| 146 | } |
Raymond Hettinger | 37a724d | 2003-09-15 21:43:16 +0000 | [diff] [blame] | 147 | |
| 148 | co = (PyObject *) PyCode_New(argcount, nlocals, stacksize, flags, |
Guido van Rossum | bea18cc | 2002-06-14 20:41:17 +0000 | [diff] [blame] | 149 | code, consts, names, varnames, |
| 150 | freevars, cellvars, filename, name, |
Raymond Hettinger | 37a724d | 2003-09-15 21:43:16 +0000 | [diff] [blame] | 151 | firstlineno, lnotab); |
Raymond Hettinger | cc1798e | 2003-09-16 04:27:52 +0000 | [diff] [blame] | 152 | Py_XDECREF(empty); |
Raymond Hettinger | 37a724d | 2003-09-15 21:43:16 +0000 | [diff] [blame] | 153 | return co; |
Guido van Rossum | bea18cc | 2002-06-14 20:41:17 +0000 | [diff] [blame] | 154 | } |
| 155 | |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 156 | static void |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 157 | code_dealloc(PyCodeObject *co) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 158 | { |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 159 | Py_XDECREF(co->co_code); |
| 160 | Py_XDECREF(co->co_consts); |
| 161 | Py_XDECREF(co->co_names); |
Guido van Rossum | 275558c | 1997-07-25 20:13:49 +0000 | [diff] [blame] | 162 | Py_XDECREF(co->co_varnames); |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 163 | Py_XDECREF(co->co_freevars); |
| 164 | Py_XDECREF(co->co_cellvars); |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 165 | Py_XDECREF(co->co_filename); |
| 166 | Py_XDECREF(co->co_name); |
Guido van Rossum | 275558c | 1997-07-25 20:13:49 +0000 | [diff] [blame] | 167 | Py_XDECREF(co->co_lnotab); |
Guido van Rossum | b18618d | 2000-05-03 23:44:39 +0000 | [diff] [blame] | 168 | PyObject_DEL(co); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 169 | } |
| 170 | |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 171 | static PyObject * |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 172 | code_repr(PyCodeObject *co) |
Guido van Rossum | 2dff991 | 1992-09-03 20:50:59 +0000 | [diff] [blame] | 173 | { |
| 174 | char buf[500]; |
| 175 | int lineno = -1; |
Guido van Rossum | 2dff991 | 1992-09-03 20:50:59 +0000 | [diff] [blame] | 176 | char *filename = "???"; |
Guido van Rossum | 9bfef44 | 1993-03-29 10:43:31 +0000 | [diff] [blame] | 177 | char *name = "???"; |
Guido van Rossum | d076c73 | 1998-10-07 19:42:25 +0000 | [diff] [blame] | 178 | |
Guido van Rossum | a396a88 | 2000-04-07 01:21:36 +0000 | [diff] [blame] | 179 | if (co->co_firstlineno != 0) |
| 180 | lineno = co->co_firstlineno; |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 181 | if (co->co_filename && PyString_Check(co->co_filename)) |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 182 | filename = PyString_AS_STRING(co->co_filename); |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 183 | if (co->co_name && PyString_Check(co->co_name)) |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 184 | name = PyString_AS_STRING(co->co_name); |
Barry Warsaw | 8f6d868 | 2001-11-28 21:10:39 +0000 | [diff] [blame] | 185 | PyOS_snprintf(buf, sizeof(buf), |
| 186 | "<code object %.100s at %p, file \"%.300s\", line %d>", |
| 187 | name, co, filename, lineno); |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 188 | return PyString_FromString(buf); |
Guido van Rossum | 2dff991 | 1992-09-03 20:50:59 +0000 | [diff] [blame] | 189 | } |
| 190 | |
Guido van Rossum | 2e8f8a3 | 1993-11-05 10:20:10 +0000 | [diff] [blame] | 191 | static int |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 192 | code_compare(PyCodeObject *co, PyCodeObject *cp) |
Guido van Rossum | 2e8f8a3 | 1993-11-05 10:20:10 +0000 | [diff] [blame] | 193 | { |
| 194 | int cmp; |
Guido van Rossum | 4467959 | 2000-04-10 16:20:31 +0000 | [diff] [blame] | 195 | cmp = PyObject_Compare(co->co_name, cp->co_name); |
| 196 | if (cmp) return cmp; |
Guido van Rossum | beef8aa | 1997-08-29 17:12:43 +0000 | [diff] [blame] | 197 | cmp = co->co_argcount - cp->co_argcount; |
Michael W. Hudson | 3ae3315 | 2002-10-03 09:50:47 +0000 | [diff] [blame] | 198 | if (cmp) return (cmp<0)?-1:1; |
Guido van Rossum | beef8aa | 1997-08-29 17:12:43 +0000 | [diff] [blame] | 199 | cmp = co->co_nlocals - cp->co_nlocals; |
Michael W. Hudson | 3ae3315 | 2002-10-03 09:50:47 +0000 | [diff] [blame] | 200 | if (cmp) return (cmp<0)?-1:1; |
Guido van Rossum | beef8aa | 1997-08-29 17:12:43 +0000 | [diff] [blame] | 201 | cmp = co->co_flags - cp->co_flags; |
Michael W. Hudson | 3ae3315 | 2002-10-03 09:50:47 +0000 | [diff] [blame] | 202 | if (cmp) return (cmp<0)?-1:1; |
Guido van Rossum | d076c73 | 1998-10-07 19:42:25 +0000 | [diff] [blame] | 203 | cmp = PyObject_Compare(co->co_code, cp->co_code); |
Guido van Rossum | 2e8f8a3 | 1993-11-05 10:20:10 +0000 | [diff] [blame] | 204 | if (cmp) return cmp; |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 205 | cmp = PyObject_Compare(co->co_consts, cp->co_consts); |
Guido van Rossum | 2e8f8a3 | 1993-11-05 10:20:10 +0000 | [diff] [blame] | 206 | if (cmp) return cmp; |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 207 | cmp = PyObject_Compare(co->co_names, cp->co_names); |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 208 | if (cmp) return cmp; |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 209 | cmp = PyObject_Compare(co->co_varnames, cp->co_varnames); |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 210 | if (cmp) return cmp; |
| 211 | cmp = PyObject_Compare(co->co_freevars, cp->co_freevars); |
| 212 | if (cmp) return cmp; |
| 213 | cmp = PyObject_Compare(co->co_cellvars, cp->co_cellvars); |
Guido van Rossum | 2e8f8a3 | 1993-11-05 10:20:10 +0000 | [diff] [blame] | 214 | return cmp; |
| 215 | } |
| 216 | |
| 217 | static long |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 218 | code_hash(PyCodeObject *co) |
Guido van Rossum | 2e8f8a3 | 1993-11-05 10:20:10 +0000 | [diff] [blame] | 219 | { |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 220 | long h, h0, h1, h2, h3, h4, h5, h6; |
Guido van Rossum | 4467959 | 2000-04-10 16:20:31 +0000 | [diff] [blame] | 221 | h0 = PyObject_Hash(co->co_name); |
| 222 | if (h0 == -1) return -1; |
Guido van Rossum | d076c73 | 1998-10-07 19:42:25 +0000 | [diff] [blame] | 223 | h1 = PyObject_Hash(co->co_code); |
Guido van Rossum | 2e8f8a3 | 1993-11-05 10:20:10 +0000 | [diff] [blame] | 224 | if (h1 == -1) return -1; |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 225 | h2 = PyObject_Hash(co->co_consts); |
Guido van Rossum | 2e8f8a3 | 1993-11-05 10:20:10 +0000 | [diff] [blame] | 226 | if (h2 == -1) return -1; |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 227 | h3 = PyObject_Hash(co->co_names); |
Guido van Rossum | 2e8f8a3 | 1993-11-05 10:20:10 +0000 | [diff] [blame] | 228 | if (h3 == -1) return -1; |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 229 | h4 = PyObject_Hash(co->co_varnames); |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 230 | if (h4 == -1) return -1; |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 231 | h5 = PyObject_Hash(co->co_freevars); |
| 232 | if (h5 == -1) return -1; |
| 233 | h6 = PyObject_Hash(co->co_cellvars); |
| 234 | if (h6 == -1) return -1; |
| 235 | h = h0 ^ h1 ^ h2 ^ h3 ^ h4 ^ h5 ^ h6 ^ |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 236 | co->co_argcount ^ co->co_nlocals ^ co->co_flags; |
Guido van Rossum | 2e8f8a3 | 1993-11-05 10:20:10 +0000 | [diff] [blame] | 237 | if (h == -1) h = -2; |
| 238 | return h; |
| 239 | } |
| 240 | |
Jeremy Hylton | 7889107 | 2001-03-01 06:09:34 +0000 | [diff] [blame] | 241 | /* XXX code objects need to participate in GC? */ |
| 242 | |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 243 | PyTypeObject PyCode_Type = { |
| 244 | PyObject_HEAD_INIT(&PyType_Type) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 245 | 0, |
| 246 | "code", |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 247 | sizeof(PyCodeObject), |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 248 | 0, |
Jeremy Hylton | c785f48 | 2001-09-14 20:08:07 +0000 | [diff] [blame] | 249 | (destructor)code_dealloc, /* tp_dealloc */ |
| 250 | 0, /* tp_print */ |
| 251 | 0, /* tp_getattr */ |
| 252 | 0, /* tp_setattr */ |
| 253 | (cmpfunc)code_compare, /* tp_compare */ |
| 254 | (reprfunc)code_repr, /* tp_repr */ |
| 255 | 0, /* tp_as_number */ |
| 256 | 0, /* tp_as_sequence */ |
| 257 | 0, /* tp_as_mapping */ |
| 258 | (hashfunc)code_hash, /* tp_hash */ |
| 259 | 0, /* tp_call */ |
| 260 | 0, /* tp_str */ |
| 261 | PyObject_GenericGetAttr, /* tp_getattro */ |
| 262 | 0, /* tp_setattro */ |
| 263 | 0, /* tp_as_buffer */ |
| 264 | Py_TPFLAGS_DEFAULT, /* tp_flags */ |
Guido van Rossum | bea18cc | 2002-06-14 20:41:17 +0000 | [diff] [blame] | 265 | code_doc, /* tp_doc */ |
Jeremy Hylton | c785f48 | 2001-09-14 20:08:07 +0000 | [diff] [blame] | 266 | 0, /* tp_traverse */ |
| 267 | 0, /* tp_clear */ |
| 268 | 0, /* tp_richcompare */ |
| 269 | 0, /* tp_weaklistoffset */ |
| 270 | 0, /* tp_iter */ |
| 271 | 0, /* tp_iternext */ |
| 272 | 0, /* tp_methods */ |
| 273 | code_memberlist, /* tp_members */ |
| 274 | 0, /* tp_getset */ |
| 275 | 0, /* tp_base */ |
| 276 | 0, /* tp_dict */ |
| 277 | 0, /* tp_descr_get */ |
| 278 | 0, /* tp_descr_set */ |
| 279 | 0, /* tp_dictoffset */ |
| 280 | 0, /* tp_init */ |
| 281 | 0, /* tp_alloc */ |
Guido van Rossum | bea18cc | 2002-06-14 20:41:17 +0000 | [diff] [blame] | 282 | code_new, /* tp_new */ |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 283 | }; |
| 284 | |
Guido van Rossum | 644a12b | 1997-04-09 19:24:53 +0000 | [diff] [blame] | 285 | #define NAME_CHARS \ |
| 286 | "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ_abcdefghijklmnopqrstuvwxyz" |
| 287 | |
Guido van Rossum | fc5ce61 | 2001-01-19 00:24:06 +0000 | [diff] [blame] | 288 | /* all_name_chars(s): true iff all chars in s are valid NAME_CHARS */ |
| 289 | |
| 290 | static int |
| 291 | all_name_chars(unsigned char *s) |
| 292 | { |
Guido van Rossum | cd90c20 | 2001-02-09 15:06:42 +0000 | [diff] [blame] | 293 | static char ok_name_char[256]; |
| 294 | static unsigned char *name_chars = (unsigned char *)NAME_CHARS; |
Guido van Rossum | fc5ce61 | 2001-01-19 00:24:06 +0000 | [diff] [blame] | 295 | |
Guido van Rossum | cd90c20 | 2001-02-09 15:06:42 +0000 | [diff] [blame] | 296 | if (ok_name_char[*name_chars] == 0) { |
| 297 | unsigned char *p; |
| 298 | for (p = name_chars; *p; p++) |
| 299 | ok_name_char[*p] = 1; |
| 300 | } |
| 301 | while (*s) { |
| 302 | if (ok_name_char[*s++] == 0) |
| 303 | return 0; |
| 304 | } |
| 305 | return 1; |
Guido van Rossum | fc5ce61 | 2001-01-19 00:24:06 +0000 | [diff] [blame] | 306 | } |
| 307 | |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 308 | static int |
| 309 | intern_strings(PyObject *tuple) |
| 310 | { |
| 311 | int i; |
| 312 | |
| 313 | for (i = PyTuple_GET_SIZE(tuple); --i >= 0; ) { |
| 314 | PyObject *v = PyTuple_GET_ITEM(tuple, i); |
| 315 | if (v == NULL || !PyString_Check(v)) { |
| 316 | Py_FatalError("non-string found in code slot"); |
| 317 | PyErr_BadInternalCall(); |
| 318 | return -1; |
| 319 | } |
| 320 | PyString_InternInPlace(&PyTuple_GET_ITEM(tuple, i)); |
| 321 | } |
| 322 | return 0; |
| 323 | } |
| 324 | |
Raymond Hettinger | f6f575a | 2003-03-26 01:07:54 +0000 | [diff] [blame] | 325 | #define GETARG(arr, i) ((int)((arr[i+2]<<8) + arr[i+1])) |
| 326 | #define UNCONDITIONAL_JUMP(op) (op==JUMP_ABSOLUTE || op==JUMP_FORWARD) |
Raymond Hettinger | 5b75c38 | 2003-03-28 12:05:00 +0000 | [diff] [blame] | 327 | #define ABSOLUTE_JUMP(op) (op==JUMP_ABSOLUTE || op==CONTINUE_LOOP) |
| 328 | #define GETJUMPTGT(arr, i) (GETARG(arr,i) + (ABSOLUTE_JUMP(arr[i]) ? 0 : i+3)) |
Raymond Hettinger | f6f575a | 2003-03-26 01:07:54 +0000 | [diff] [blame] | 329 | #define SETARG(arr, i, val) arr[i+2] = val>>8; arr[i+1] = val & 255 |
| 330 | |
| 331 | static PyObject * |
| 332 | optimize_code(PyObject *code, PyObject* consts) |
| 333 | { |
| 334 | int i, j, codelen; |
| 335 | int tgt, tgttgt, opcode; |
| 336 | unsigned char *codestr; |
| 337 | |
| 338 | /* Make a modifiable copy of the code string */ |
| 339 | if (!PyString_Check(code)) |
| 340 | goto exitUnchanged; |
| 341 | codelen = PyString_Size(code); |
| 342 | codestr = PyMem_Malloc(codelen); |
Raymond Hettinger | f4cf76d | 2003-04-24 05:45:23 +0000 | [diff] [blame] | 343 | if (codestr == NULL) |
Raymond Hettinger | f6f575a | 2003-03-26 01:07:54 +0000 | [diff] [blame] | 344 | goto exitUnchanged; |
| 345 | codestr = memcpy(codestr, PyString_AS_STRING(code), codelen); |
| 346 | assert(PyTuple_Check(consts)); |
| 347 | |
Raymond Hettinger | f4cf76d | 2003-04-24 05:45:23 +0000 | [diff] [blame] | 348 | for (i=0 ; i<codelen-7 ; i += HAS_ARG(codestr[i]) ? 3 : 1) { |
Raymond Hettinger | f6f575a | 2003-03-26 01:07:54 +0000 | [diff] [blame] | 349 | opcode = codestr[i]; |
| 350 | switch (opcode) { |
| 351 | |
| 352 | /* Skip over LOAD_CONST trueconst JUMP_IF_FALSE xx POP_TOP. |
| 353 | Note, only the first opcode is changed, the others still |
| 354 | perform normally if they happen to be jump targets. */ |
| 355 | case LOAD_CONST: |
| 356 | j = GETARG(codestr, i); |
| 357 | if (codestr[i+3] != JUMP_IF_FALSE || |
| 358 | codestr[i+6] != POP_TOP || |
| 359 | !PyObject_IsTrue(PyTuple_GET_ITEM(consts, j))) |
| 360 | continue; |
| 361 | codestr[i] = JUMP_FORWARD; |
| 362 | SETARG(codestr, i, 4); |
| 363 | break; |
| 364 | |
Raymond Hettinger | f6f575a | 2003-03-26 01:07:54 +0000 | [diff] [blame] | 365 | /* Replace jumps to unconditional jumps */ |
Raymond Hettinger | 255a3d0 | 2003-04-15 10:35:07 +0000 | [diff] [blame] | 366 | case FOR_ITER: |
Raymond Hettinger | f6f575a | 2003-03-26 01:07:54 +0000 | [diff] [blame] | 367 | case JUMP_FORWARD: |
| 368 | case JUMP_IF_FALSE: |
| 369 | case JUMP_IF_TRUE: |
| 370 | case JUMP_ABSOLUTE: |
| 371 | case CONTINUE_LOOP: |
| 372 | case SETUP_LOOP: |
| 373 | case SETUP_EXCEPT: |
| 374 | case SETUP_FINALLY: |
| 375 | tgt = GETJUMPTGT(codestr, i); |
Raymond Hettinger | f4cf76d | 2003-04-24 05:45:23 +0000 | [diff] [blame] | 376 | if (!UNCONDITIONAL_JUMP(codestr[tgt])) |
Raymond Hettinger | f6f575a | 2003-03-26 01:07:54 +0000 | [diff] [blame] | 377 | continue; |
| 378 | tgttgt = GETJUMPTGT(codestr, tgt); |
| 379 | if (opcode == JUMP_FORWARD) /* JMP_ABS can go backwards */ |
| 380 | opcode = JUMP_ABSOLUTE; |
Raymond Hettinger | 5b75c38 | 2003-03-28 12:05:00 +0000 | [diff] [blame] | 381 | if (!ABSOLUTE_JUMP(opcode)) |
Raymond Hettinger | f6f575a | 2003-03-26 01:07:54 +0000 | [diff] [blame] | 382 | tgttgt -= i + 3; /* Calc relative jump addr */ |
| 383 | if (tgttgt < 0) /* No backward relative jumps */ |
| 384 | continue; |
| 385 | codestr[i] = opcode; |
| 386 | SETARG(codestr, i, tgttgt); |
| 387 | break; |
| 388 | |
| 389 | case EXTENDED_ARG: |
| 390 | PyMem_Free(codestr); |
| 391 | goto exitUnchanged; |
| 392 | } |
| 393 | } |
Martin v. Löwis | a94568a | 2003-05-10 07:36:56 +0000 | [diff] [blame] | 394 | code = PyString_FromStringAndSize((char *)codestr, codelen); |
Raymond Hettinger | f6f575a | 2003-03-26 01:07:54 +0000 | [diff] [blame] | 395 | PyMem_Free(codestr); |
| 396 | return code; |
| 397 | |
| 398 | exitUnchanged: |
| 399 | Py_INCREF(code); |
| 400 | return code; |
| 401 | } |
| 402 | |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 403 | PyCodeObject * |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 404 | PyCode_New(int argcount, int nlocals, int stacksize, int flags, |
| 405 | PyObject *code, PyObject *consts, PyObject *names, |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 406 | PyObject *varnames, PyObject *freevars, PyObject *cellvars, |
| 407 | PyObject *filename, PyObject *name, int firstlineno, |
| 408 | PyObject *lnotab) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 409 | { |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 410 | PyCodeObject *co; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 411 | int i; |
| 412 | /* Check argument types */ |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 413 | if (argcount < 0 || nlocals < 0 || |
Guido van Rossum | d076c73 | 1998-10-07 19:42:25 +0000 | [diff] [blame] | 414 | code == NULL || |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 415 | consts == NULL || !PyTuple_Check(consts) || |
| 416 | names == NULL || !PyTuple_Check(names) || |
| 417 | varnames == NULL || !PyTuple_Check(varnames) || |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 418 | freevars == NULL || !PyTuple_Check(freevars) || |
| 419 | cellvars == NULL || !PyTuple_Check(cellvars) || |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 420 | name == NULL || !PyString_Check(name) || |
| 421 | filename == NULL || !PyString_Check(filename) || |
Jeremy Hylton | 9f64caa | 2001-11-09 22:02:48 +0000 | [diff] [blame] | 422 | lnotab == NULL || !PyString_Check(lnotab) || |
| 423 | !PyObject_CheckReadBuffer(code)) { |
Guido van Rossum | d076c73 | 1998-10-07 19:42:25 +0000 | [diff] [blame] | 424 | PyErr_BadInternalCall(); |
| 425 | return NULL; |
| 426 | } |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 427 | intern_strings(names); |
| 428 | intern_strings(varnames); |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 429 | intern_strings(freevars); |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 430 | intern_strings(cellvars); |
Guido van Rossum | 7b89b6a | 1997-01-18 08:02:57 +0000 | [diff] [blame] | 431 | /* Intern selected string constants */ |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 432 | for (i = PyTuple_Size(consts); --i >= 0; ) { |
| 433 | PyObject *v = PyTuple_GetItem(consts, i); |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 434 | if (!PyString_Check(v)) |
Guido van Rossum | 7b89b6a | 1997-01-18 08:02:57 +0000 | [diff] [blame] | 435 | continue; |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 436 | if (!all_name_chars((unsigned char *)PyString_AS_STRING(v))) |
Guido van Rossum | 7b89b6a | 1997-01-18 08:02:57 +0000 | [diff] [blame] | 437 | continue; |
| 438 | PyString_InternInPlace(&PyTuple_GET_ITEM(consts, i)); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 439 | } |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 440 | co = PyObject_NEW(PyCodeObject, &PyCode_Type); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 441 | if (co != NULL) { |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 442 | co->co_argcount = argcount; |
| 443 | co->co_nlocals = nlocals; |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 444 | co->co_stacksize = stacksize; |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 445 | co->co_flags = flags; |
Raymond Hettinger | f6f575a | 2003-03-26 01:07:54 +0000 | [diff] [blame] | 446 | co->co_code = optimize_code(code, consts); |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 447 | Py_INCREF(consts); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 448 | co->co_consts = consts; |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 449 | Py_INCREF(names); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 450 | co->co_names = names; |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 451 | Py_INCREF(varnames); |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 452 | co->co_varnames = varnames; |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 453 | Py_INCREF(freevars); |
| 454 | co->co_freevars = freevars; |
| 455 | Py_INCREF(cellvars); |
| 456 | co->co_cellvars = cellvars; |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 457 | Py_INCREF(filename); |
Guido van Rossum | a082ce4 | 1991-06-04 19:41:56 +0000 | [diff] [blame] | 458 | co->co_filename = filename; |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 459 | Py_INCREF(name); |
Guido van Rossum | 9bfef44 | 1993-03-29 10:43:31 +0000 | [diff] [blame] | 460 | co->co_name = name; |
Guido van Rossum | da4eb5c | 1997-01-24 03:43:35 +0000 | [diff] [blame] | 461 | co->co_firstlineno = firstlineno; |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 462 | Py_INCREF(lnotab); |
Guido van Rossum | da4eb5c | 1997-01-24 03:43:35 +0000 | [diff] [blame] | 463 | co->co_lnotab = lnotab; |
Jeremy Hylton | 985eba5 | 2003-02-05 23:13:00 +0000 | [diff] [blame] | 464 | if (PyTuple_GET_SIZE(freevars) == 0 && |
| 465 | PyTuple_GET_SIZE(cellvars) == 0) |
| 466 | co->co_flags |= CO_NOFREE; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 467 | } |
| 468 | return co; |
| 469 | } |
| 470 | |
| 471 | |
| 472 | /* Data structure used internally */ |
Guido van Rossum | 4bad92c | 1991-07-27 21:34:52 +0000 | [diff] [blame] | 473 | |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 474 | /* The compiler uses two passes to generate bytecodes. The first pass |
| 475 | builds the symbol table. The second pass generates the bytecode. |
| 476 | |
| 477 | The first pass uses a single symtable struct. The second pass uses |
| 478 | a compiling struct for each code block. The compiling structs |
| 479 | share a reference to the symtable. |
| 480 | |
| 481 | The two passes communicate via symtable_load_symbols() and via |
| 482 | is_local() and is_global(). The former initializes several slots |
| 483 | in the compiling struct: c_varnames, c_locals, c_nlocals, |
| 484 | c_argcount, c_globals, and c_flags. |
| 485 | */ |
| 486 | |
Tim Peters | 2a7f384 | 2001-06-09 09:26:21 +0000 | [diff] [blame] | 487 | /* All about c_lnotab. |
| 488 | |
Michael W. Hudson | dd32a91 | 2002-08-15 14:59:02 +0000 | [diff] [blame] | 489 | c_lnotab is an array of unsigned bytes disguised as a Python string. Since |
| 490 | version 2.3, SET_LINENO opcodes are never generated and bytecode offsets are |
| 491 | mapped to source code line #s via c_lnotab instead. |
| 492 | |
Tim Peters | 2a7f384 | 2001-06-09 09:26:21 +0000 | [diff] [blame] | 493 | The array is conceptually a list of |
| 494 | (bytecode offset increment, line number increment) |
| 495 | pairs. The details are important and delicate, best illustrated by example: |
| 496 | |
| 497 | byte code offset source code line number |
| 498 | 0 1 |
| 499 | 6 2 |
| 500 | 50 7 |
| 501 | 350 307 |
| 502 | 361 308 |
| 503 | |
| 504 | The first trick is that these numbers aren't stored, only the increments |
| 505 | from one row to the next (this doesn't really work, but it's a start): |
| 506 | |
| 507 | 0, 1, 6, 1, 44, 5, 300, 300, 11, 1 |
| 508 | |
| 509 | The second trick is that an unsigned byte can't hold negative values, or |
| 510 | values larger than 255, so (a) there's a deep assumption that byte code |
| 511 | offsets and their corresponding line #s both increase monotonically, and (b) |
| 512 | if at least one column jumps by more than 255 from one row to the next, more |
| 513 | than one pair is written to the table. In case #b, there's no way to know |
| 514 | from looking at the table later how many were written. That's the delicate |
| 515 | part. A user of c_lnotab desiring to find the source line number |
| 516 | corresponding to a bytecode address A should do something like this |
| 517 | |
| 518 | lineno = addr = 0 |
| 519 | for addr_incr, line_incr in c_lnotab: |
| 520 | addr += addr_incr |
| 521 | if addr > A: |
| 522 | return lineno |
| 523 | lineno += line_incr |
| 524 | |
| 525 | In order for this to work, when the addr field increments by more than 255, |
| 526 | the line # increment in each pair generated must be 0 until the remaining addr |
| 527 | increment is < 256. So, in the example above, com_set_lineno should not (as |
| 528 | was actually done until 2.2) expand 300, 300 to 255, 255, 45, 45, but to |
| 529 | 255, 0, 45, 255, 0, 45. |
| 530 | */ |
| 531 | |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 532 | struct compiling { |
Fred Drake | fd1f1be | 2000-09-08 16:31:24 +0000 | [diff] [blame] | 533 | PyObject *c_code; /* string */ |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 534 | PyObject *c_consts; /* list of objects */ |
Guido van Rossum | a2ace6a | 2000-04-28 16:42:25 +0000 | [diff] [blame] | 535 | PyObject *c_const_dict; /* inverse of c_consts */ |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 536 | PyObject *c_names; /* list of strings (names) */ |
Guido van Rossum | a2ace6a | 2000-04-28 16:42:25 +0000 | [diff] [blame] | 537 | PyObject *c_name_dict; /* inverse of c_names */ |
Neal Norwitz | 0698222 | 2002-12-18 01:18:44 +0000 | [diff] [blame] | 538 | PyObject *c_globals; /* dictionary (value=None or True) */ |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 539 | PyObject *c_locals; /* dictionary (value=localID) */ |
| 540 | PyObject *c_varnames; /* list (inverse of c_locals) */ |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 541 | PyObject *c_freevars; /* dictionary (value=None) */ |
| 542 | PyObject *c_cellvars; /* list */ |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 543 | int c_nlocals; /* index of next local */ |
| 544 | int c_argcount; /* number of top-level arguments */ |
| 545 | int c_flags; /* same as co_flags */ |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 546 | int c_nexti; /* index into c_code */ |
| 547 | int c_errors; /* counts errors occurred */ |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 548 | int c_infunction; /* set when compiling a function */ |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 549 | int c_interactive; /* generating code for interactive command */ |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 550 | int c_loops; /* counts nested loops */ |
Guido van Rossum | 4bad92c | 1991-07-27 21:34:52 +0000 | [diff] [blame] | 551 | int c_begin; /* begin of current loop, for 'continue' */ |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 552 | int c_block[CO_MAXBLOCKS]; /* stack of block types */ |
Guido van Rossum | 4bad92c | 1991-07-27 21:34:52 +0000 | [diff] [blame] | 553 | int c_nblocks; /* current block stack level */ |
Martin v. Löwis | 95292d6 | 2002-12-11 14:04:59 +0000 | [diff] [blame] | 554 | const char *c_filename; /* filename of current node */ |
Guido van Rossum | 9bfef44 | 1993-03-29 10:43:31 +0000 | [diff] [blame] | 555 | char *c_name; /* name of object (e.g. function) */ |
Guido van Rossum | 452a983 | 1996-09-17 14:32:04 +0000 | [diff] [blame] | 556 | int c_lineno; /* Current line number */ |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 557 | int c_stacklevel; /* Current stack level */ |
| 558 | int c_maxstacklevel; /* Maximum stack level */ |
Guido van Rossum | da4eb5c | 1997-01-24 03:43:35 +0000 | [diff] [blame] | 559 | int c_firstlineno; |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 560 | PyObject *c_lnotab; /* Table mapping address to line number */ |
Guido van Rossum | da4eb5c | 1997-01-24 03:43:35 +0000 | [diff] [blame] | 561 | int c_last_addr, c_last_line, c_lnotab_next; |
Guido van Rossum | 8ff077b | 1996-08-24 06:21:31 +0000 | [diff] [blame] | 562 | char *c_private; /* for private name mangling */ |
Skip Montanaro | 803d6e5 | 2000-08-12 18:09:51 +0000 | [diff] [blame] | 563 | int c_tmpname; /* temporary local name counter */ |
Guido van Rossum | cd90c20 | 2001-02-09 15:06:42 +0000 | [diff] [blame] | 564 | int c_nested; /* Is block nested funcdef or lamdef? */ |
| 565 | int c_closure; /* Is nested w/freevars? */ |
| 566 | struct symtable *c_symtable; /* pointer to module symbol table */ |
Jeremy Hylton | 4db62b1 | 2001-02-27 19:07:02 +0000 | [diff] [blame] | 567 | PyFutureFeatures *c_future; /* pointer to module's __future__ */ |
Martin v. Löwis | 00f1e3f | 2002-08-04 17:29:52 +0000 | [diff] [blame] | 568 | char *c_encoding; /* source encoding (a borrowed reference) */ |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 569 | }; |
| 570 | |
Guido van Rossum | f68d8e5 | 2001-04-14 17:55:09 +0000 | [diff] [blame] | 571 | static int |
| 572 | is_free(int v) |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 573 | { |
| 574 | if ((v & (USE | DEF_FREE)) |
| 575 | && !(v & (DEF_LOCAL | DEF_PARAM | DEF_GLOBAL))) |
| 576 | return 1; |
| 577 | if (v & DEF_FREE_CLASS) |
| 578 | return 1; |
| 579 | return 0; |
| 580 | } |
Guido van Rossum | 4bad92c | 1991-07-27 21:34:52 +0000 | [diff] [blame] | 581 | |
Jeremy Hylton | 5acc0c0 | 2001-02-02 20:01:10 +0000 | [diff] [blame] | 582 | static void |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 583 | com_error(struct compiling *c, PyObject *exc, char *msg) |
Guido van Rossum | 452a983 | 1996-09-17 14:32:04 +0000 | [diff] [blame] | 584 | { |
Jeremy Hylton | 9f1b993 | 2001-02-28 07:07:43 +0000 | [diff] [blame] | 585 | PyObject *t = NULL, *v = NULL, *w = NULL, *line = NULL; |
| 586 | |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 587 | if (c == NULL) { |
| 588 | /* Error occurred via symtable call to |
| 589 | is_constant_false */ |
| 590 | PyErr_SetString(exc, msg); |
| 591 | return; |
| 592 | } |
Guido van Rossum | 635abd2 | 1997-01-06 22:56:52 +0000 | [diff] [blame] | 593 | c->c_errors++; |
Jeremy Hylton | 9f1b993 | 2001-02-28 07:07:43 +0000 | [diff] [blame] | 594 | if (c->c_lineno < 1 || c->c_interactive) { |
| 595 | /* Unknown line number or interactive input */ |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 596 | PyErr_SetString(exc, msg); |
Guido van Rossum | 452a983 | 1996-09-17 14:32:04 +0000 | [diff] [blame] | 597 | return; |
| 598 | } |
Fred Drake | dcf08e0 | 2000-08-15 15:49:44 +0000 | [diff] [blame] | 599 | v = PyString_FromString(msg); |
Guido van Rossum | 452a983 | 1996-09-17 14:32:04 +0000 | [diff] [blame] | 600 | if (v == NULL) |
| 601 | return; /* MemoryError, too bad */ |
Fred Drake | dcf08e0 | 2000-08-15 15:49:44 +0000 | [diff] [blame] | 602 | |
Jeremy Hylton | ad3d3f2 | 2001-02-28 17:47:12 +0000 | [diff] [blame] | 603 | line = PyErr_ProgramText(c->c_filename, c->c_lineno); |
Jeremy Hylton | 9f1b993 | 2001-02-28 07:07:43 +0000 | [diff] [blame] | 604 | if (line == NULL) { |
| 605 | Py_INCREF(Py_None); |
| 606 | line = Py_None; |
| 607 | } |
Martin v. Löwis | cfeb3b6 | 2002-03-03 21:30:27 +0000 | [diff] [blame] | 608 | if (exc == PyExc_SyntaxError) { |
| 609 | t = Py_BuildValue("(ziOO)", c->c_filename, c->c_lineno, |
| 610 | Py_None, line); |
| 611 | if (t == NULL) |
| 612 | goto exit; |
Raymond Hettinger | 8ae4689 | 2003-10-12 19:09:37 +0000 | [diff] [blame] | 613 | w = PyTuple_Pack(2, v, t); |
Martin v. Löwis | cfeb3b6 | 2002-03-03 21:30:27 +0000 | [diff] [blame] | 614 | if (w == NULL) |
| 615 | goto exit; |
| 616 | PyErr_SetObject(exc, w); |
| 617 | } else { |
| 618 | /* Make sure additional exceptions are printed with |
| 619 | file and line, also. */ |
| 620 | PyErr_SetObject(exc, v); |
| 621 | PyErr_SyntaxLocation(c->c_filename, c->c_lineno); |
| 622 | } |
Jeremy Hylton | 9f1b993 | 2001-02-28 07:07:43 +0000 | [diff] [blame] | 623 | exit: |
| 624 | Py_XDECREF(t); |
| 625 | Py_XDECREF(v); |
| 626 | Py_XDECREF(w); |
| 627 | Py_XDECREF(line); |
Guido van Rossum | 452a983 | 1996-09-17 14:32:04 +0000 | [diff] [blame] | 628 | } |
| 629 | |
Guido van Rossum | 4bad92c | 1991-07-27 21:34:52 +0000 | [diff] [blame] | 630 | /* Interface to the block stack */ |
| 631 | |
| 632 | static void |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 633 | block_push(struct compiling *c, int type) |
Guido van Rossum | 4bad92c | 1991-07-27 21:34:52 +0000 | [diff] [blame] | 634 | { |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 635 | if (c->c_nblocks >= CO_MAXBLOCKS) { |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 636 | com_error(c, PyExc_SystemError, |
| 637 | "too many statically nested blocks"); |
Guido van Rossum | 4bad92c | 1991-07-27 21:34:52 +0000 | [diff] [blame] | 638 | } |
| 639 | else { |
| 640 | c->c_block[c->c_nblocks++] = type; |
| 641 | } |
| 642 | } |
| 643 | |
| 644 | static void |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 645 | block_pop(struct compiling *c, int type) |
Guido van Rossum | 4bad92c | 1991-07-27 21:34:52 +0000 | [diff] [blame] | 646 | { |
| 647 | if (c->c_nblocks > 0) |
| 648 | c->c_nblocks--; |
| 649 | if (c->c_block[c->c_nblocks] != type && c->c_errors == 0) { |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 650 | com_error(c, PyExc_SystemError, "bad block pop"); |
Guido van Rossum | 4bad92c | 1991-07-27 21:34:52 +0000 | [diff] [blame] | 651 | } |
| 652 | } |
| 653 | |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 654 | /* Prototype forward declarations */ |
Guido van Rossum | 4bad92c | 1991-07-27 21:34:52 +0000 | [diff] [blame] | 655 | |
Martin v. Löwis | 95292d6 | 2002-12-11 14:04:59 +0000 | [diff] [blame] | 656 | static int issue_warning(const char *, const char *, int); |
| 657 | static int com_init(struct compiling *, const char *); |
Tim Peters | dbd9ba6 | 2000-07-09 03:09:57 +0000 | [diff] [blame] | 658 | static void com_free(struct compiling *); |
| 659 | static void com_push(struct compiling *, int); |
| 660 | static void com_pop(struct compiling *, int); |
| 661 | static void com_done(struct compiling *); |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 662 | static void com_node(struct compiling *, node *); |
| 663 | static void com_factor(struct compiling *, node *); |
Tim Peters | dbd9ba6 | 2000-07-09 03:09:57 +0000 | [diff] [blame] | 664 | static void com_addbyte(struct compiling *, int); |
| 665 | static void com_addint(struct compiling *, int); |
| 666 | static void com_addoparg(struct compiling *, int, int); |
| 667 | static void com_addfwref(struct compiling *, int, int *); |
| 668 | static void com_backpatch(struct compiling *, int); |
| 669 | static int com_add(struct compiling *, PyObject *, PyObject *, PyObject *); |
| 670 | static int com_addconst(struct compiling *, PyObject *); |
| 671 | static int com_addname(struct compiling *, PyObject *); |
| 672 | static void com_addopname(struct compiling *, int, node *); |
| 673 | static void com_list(struct compiling *, node *, int); |
Skip Montanaro | 803d6e5 | 2000-08-12 18:09:51 +0000 | [diff] [blame] | 674 | static void com_list_iter(struct compiling *, node *, node *, char *); |
Tim Peters | dbd9ba6 | 2000-07-09 03:09:57 +0000 | [diff] [blame] | 675 | static int com_argdefs(struct compiling *, node *); |
Thomas Wouters | 434d082 | 2000-08-24 20:11:32 +0000 | [diff] [blame] | 676 | static void com_assign(struct compiling *, node *, int, node *); |
| 677 | static void com_assign_name(struct compiling *, node *, int); |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 678 | static PyCodeObject *icompile(node *, struct compiling *); |
Martin v. Löwis | 95292d6 | 2002-12-11 14:04:59 +0000 | [diff] [blame] | 679 | static PyCodeObject *jcompile(node *, const char *, struct compiling *, |
Jeremy Hylton | 9f324e9 | 2001-03-01 22:59:14 +0000 | [diff] [blame] | 680 | PyCompilerFlags *); |
Martin v. Löwis | 339d0f7 | 2001-08-17 18:39:25 +0000 | [diff] [blame] | 681 | static PyObject *parsestrplus(struct compiling*, node *); |
| 682 | static PyObject *parsestr(struct compiling *, char *); |
Thomas Wouters | 434d082 | 2000-08-24 20:11:32 +0000 | [diff] [blame] | 683 | static node *get_rawdocstring(node *); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 684 | |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 685 | static int get_ref_type(struct compiling *, char *); |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 686 | |
| 687 | /* symtable operations */ |
Jeremy Hylton | 1955fcf | 2003-07-15 20:23:26 +0000 | [diff] [blame] | 688 | static struct symtable *symtable_build(node *, PyFutureFeatures *, |
| 689 | const char *filename); |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 690 | static int symtable_load_symbols(struct compiling *); |
Jeremy Hylton | cb17ae8 | 2001-02-09 22:22:18 +0000 | [diff] [blame] | 691 | static struct symtable *symtable_init(void); |
Jeremy Hylton | 4b38da6 | 2001-02-02 18:19:15 +0000 | [diff] [blame] | 692 | static void symtable_enter_scope(struct symtable *, char *, int, int); |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 693 | static int symtable_exit_scope(struct symtable *); |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 694 | static int symtable_add_def(struct symtable *, char *, int); |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 695 | static int symtable_add_def_o(struct symtable *, PyObject *, PyObject *, int); |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 696 | |
| 697 | static void symtable_node(struct symtable *, node *); |
| 698 | static void symtable_funcdef(struct symtable *, node *); |
| 699 | static void symtable_default_args(struct symtable *, node *); |
| 700 | static void symtable_params(struct symtable *, node *); |
| 701 | static void symtable_params_fplist(struct symtable *, node *n); |
| 702 | static void symtable_global(struct symtable *, node *); |
| 703 | static void symtable_import(struct symtable *, node *); |
Jeremy Hylton | eab156f | 2001-01-30 01:24:43 +0000 | [diff] [blame] | 704 | static void symtable_assign(struct symtable *, node *, int); |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 705 | static void symtable_list_comprehension(struct symtable *, node *); |
Jeremy Hylton | 4d508ad | 2003-05-21 17:34:50 +0000 | [diff] [blame] | 706 | static void symtable_list_for(struct symtable *, node *); |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 707 | |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 708 | static int symtable_update_free_vars(struct symtable *); |
| 709 | static int symtable_undo_free(struct symtable *, PyObject *, PyObject *); |
| 710 | static int symtable_check_global(struct symtable *, PyObject *, PyObject *); |
| 711 | |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 712 | /* helper */ |
| 713 | static void |
| 714 | do_pad(int pad) |
| 715 | { |
| 716 | int i; |
| 717 | for (i = 0; i < pad; ++i) |
| 718 | fprintf(stderr, " "); |
| 719 | } |
| 720 | |
| 721 | static void |
| 722 | dump(node *n, int pad, int depth) |
| 723 | { |
| 724 | int i; |
| 725 | if (depth == 0) |
| 726 | return; |
| 727 | do_pad(pad); |
| 728 | fprintf(stderr, "%d: %s\n", TYPE(n), STR(n)); |
| 729 | if (depth > 0) |
| 730 | depth--; |
| 731 | for (i = 0; i < NCH(n); ++i) |
| 732 | dump(CHILD(n, i), pad + 1, depth); |
| 733 | } |
| 734 | |
| 735 | #define DUMP(N) dump(N, 0, -1) |
| 736 | |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 737 | static int |
Martin v. Löwis | 95292d6 | 2002-12-11 14:04:59 +0000 | [diff] [blame] | 738 | com_init(struct compiling *c, const char *filename) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 739 | { |
Guido van Rossum | a2ace6a | 2000-04-28 16:42:25 +0000 | [diff] [blame] | 740 | memset((void *)c, '\0', sizeof(struct compiling)); |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 741 | if ((c->c_code = PyString_FromStringAndSize((char *)NULL, |
| 742 | 1000)) == NULL) |
Guido van Rossum | a2ace6a | 2000-04-28 16:42:25 +0000 | [diff] [blame] | 743 | goto fail; |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 744 | if ((c->c_consts = PyList_New(0)) == NULL) |
Guido van Rossum | a2ace6a | 2000-04-28 16:42:25 +0000 | [diff] [blame] | 745 | goto fail; |
| 746 | if ((c->c_const_dict = PyDict_New()) == NULL) |
| 747 | goto fail; |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 748 | if ((c->c_names = PyList_New(0)) == NULL) |
Guido van Rossum | a2ace6a | 2000-04-28 16:42:25 +0000 | [diff] [blame] | 749 | goto fail; |
| 750 | if ((c->c_name_dict = PyDict_New()) == NULL) |
| 751 | goto fail; |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 752 | if ((c->c_locals = PyDict_New()) == NULL) |
Guido van Rossum | a2ace6a | 2000-04-28 16:42:25 +0000 | [diff] [blame] | 753 | goto fail; |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 754 | if ((c->c_lnotab = PyString_FromStringAndSize((char *)NULL, |
| 755 | 1000)) == NULL) |
Guido van Rossum | a2ace6a | 2000-04-28 16:42:25 +0000 | [diff] [blame] | 756 | goto fail; |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 757 | c->c_globals = NULL; |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 758 | c->c_varnames = NULL; |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 759 | c->c_freevars = NULL; |
| 760 | c->c_cellvars = NULL; |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 761 | c->c_nlocals = 0; |
| 762 | c->c_argcount = 0; |
| 763 | c->c_flags = 0; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 764 | c->c_nexti = 0; |
| 765 | c->c_errors = 0; |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 766 | c->c_infunction = 0; |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 767 | c->c_interactive = 0; |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 768 | c->c_loops = 0; |
Guido van Rossum | 4bad92c | 1991-07-27 21:34:52 +0000 | [diff] [blame] | 769 | c->c_begin = 0; |
| 770 | c->c_nblocks = 0; |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 771 | c->c_filename = filename; |
Guido van Rossum | 9bfef44 | 1993-03-29 10:43:31 +0000 | [diff] [blame] | 772 | c->c_name = "?"; |
Guido van Rossum | 452a983 | 1996-09-17 14:32:04 +0000 | [diff] [blame] | 773 | c->c_lineno = 0; |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 774 | c->c_stacklevel = 0; |
| 775 | c->c_maxstacklevel = 0; |
Guido van Rossum | da4eb5c | 1997-01-24 03:43:35 +0000 | [diff] [blame] | 776 | c->c_firstlineno = 0; |
| 777 | c->c_last_addr = 0; |
| 778 | c->c_last_line = 0; |
Barry Warsaw | 174e801 | 2001-01-22 04:35:57 +0000 | [diff] [blame] | 779 | c->c_lnotab_next = 0; |
Skip Montanaro | 803d6e5 | 2000-08-12 18:09:51 +0000 | [diff] [blame] | 780 | c->c_tmpname = 0; |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 781 | c->c_nested = 0; |
| 782 | c->c_closure = 0; |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 783 | c->c_symtable = NULL; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 784 | return 1; |
| 785 | |
Guido van Rossum | a2ace6a | 2000-04-28 16:42:25 +0000 | [diff] [blame] | 786 | fail: |
| 787 | com_free(c); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 788 | return 0; |
| 789 | } |
| 790 | |
| 791 | static void |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 792 | com_free(struct compiling *c) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 793 | { |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 794 | Py_XDECREF(c->c_code); |
| 795 | Py_XDECREF(c->c_consts); |
Guido van Rossum | a2ace6a | 2000-04-28 16:42:25 +0000 | [diff] [blame] | 796 | Py_XDECREF(c->c_const_dict); |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 797 | Py_XDECREF(c->c_names); |
Guido van Rossum | a2ace6a | 2000-04-28 16:42:25 +0000 | [diff] [blame] | 798 | Py_XDECREF(c->c_name_dict); |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 799 | Py_XDECREF(c->c_globals); |
| 800 | Py_XDECREF(c->c_locals); |
| 801 | Py_XDECREF(c->c_varnames); |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 802 | Py_XDECREF(c->c_freevars); |
| 803 | Py_XDECREF(c->c_cellvars); |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 804 | Py_XDECREF(c->c_lnotab); |
Jeremy Hylton | 39e2f3f | 2001-02-28 01:58:08 +0000 | [diff] [blame] | 805 | if (c->c_future) |
Andrew MacIntyre | 80d4e2a | 2002-08-04 06:28:21 +0000 | [diff] [blame] | 806 | PyObject_FREE((void *)c->c_future); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 807 | } |
| 808 | |
| 809 | static void |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 810 | com_push(struct compiling *c, int n) |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 811 | { |
| 812 | c->c_stacklevel += n; |
Jeremy Hylton | 93a569d | 2001-10-17 13:22:22 +0000 | [diff] [blame] | 813 | if (c->c_stacklevel > c->c_maxstacklevel) { |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 814 | c->c_maxstacklevel = c->c_stacklevel; |
Jeremy Hylton | 93a569d | 2001-10-17 13:22:22 +0000 | [diff] [blame] | 815 | /* |
| 816 | fprintf(stderr, "%s:%s:%d max stack nexti=%d level=%d n=%d\n", |
| 817 | c->c_filename, c->c_name, c->c_lineno, |
| 818 | c->c_nexti, c->c_stacklevel, n); |
| 819 | */ |
| 820 | } |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 821 | } |
| 822 | |
| 823 | static void |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 824 | com_pop(struct compiling *c, int n) |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 825 | { |
Jeremy Hylton | 93a569d | 2001-10-17 13:22:22 +0000 | [diff] [blame] | 826 | if (c->c_stacklevel < n) |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 827 | c->c_stacklevel = 0; |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 828 | else |
| 829 | c->c_stacklevel -= n; |
| 830 | } |
| 831 | |
| 832 | static void |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 833 | com_done(struct compiling *c) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 834 | { |
| 835 | if (c->c_code != NULL) |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 836 | _PyString_Resize(&c->c_code, c->c_nexti); |
Guido van Rossum | da4eb5c | 1997-01-24 03:43:35 +0000 | [diff] [blame] | 837 | if (c->c_lnotab != NULL) |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 838 | _PyString_Resize(&c->c_lnotab, c->c_lnotab_next); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 839 | } |
| 840 | |
Jeremy Hylton | 93a569d | 2001-10-17 13:22:22 +0000 | [diff] [blame] | 841 | static int |
| 842 | com_check_size(PyObject **s, int offset) |
| 843 | { |
| 844 | int len = PyString_GET_SIZE(*s); |
| 845 | if (offset >= len) |
| 846 | return _PyString_Resize(s, len * 2); |
| 847 | return 0; |
| 848 | } |
| 849 | |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 850 | static void |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 851 | com_addbyte(struct compiling *c, int byte) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 852 | { |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 853 | /*fprintf(stderr, "%3d: %3d\n", c->c_nexti, byte);*/ |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 854 | assert(byte >= 0 && byte <= 255); |
Martin v. Löwis | 7198a52 | 2002-01-01 19:59:11 +0000 | [diff] [blame] | 855 | assert(c->c_code != 0); |
Jeremy Hylton | 93a569d | 2001-10-17 13:22:22 +0000 | [diff] [blame] | 856 | if (com_check_size(&c->c_code, c->c_nexti)) { |
| 857 | c->c_errors++; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 858 | return; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 859 | } |
Jeremy Hylton | 93a569d | 2001-10-17 13:22:22 +0000 | [diff] [blame] | 860 | PyString_AS_STRING(c->c_code)[c->c_nexti++] = byte; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 861 | } |
| 862 | |
| 863 | static void |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 864 | com_addint(struct compiling *c, int x) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 865 | { |
Guido van Rossum | d6f3bc2 | 1990-11-18 17:35:03 +0000 | [diff] [blame] | 866 | com_addbyte(c, x & 0xff); |
| 867 | com_addbyte(c, x >> 8); /* XXX x should be positive */ |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 868 | } |
| 869 | |
| 870 | static void |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 871 | com_add_lnotab(struct compiling *c, int addr, int line) |
Guido van Rossum | da4eb5c | 1997-01-24 03:43:35 +0000 | [diff] [blame] | 872 | { |
Guido van Rossum | da4eb5c | 1997-01-24 03:43:35 +0000 | [diff] [blame] | 873 | char *p; |
| 874 | if (c->c_lnotab == NULL) |
| 875 | return; |
Jeremy Hylton | 93a569d | 2001-10-17 13:22:22 +0000 | [diff] [blame] | 876 | if (com_check_size(&c->c_lnotab, c->c_lnotab_next + 2)) { |
| 877 | c->c_errors++; |
| 878 | return; |
Guido van Rossum | da4eb5c | 1997-01-24 03:43:35 +0000 | [diff] [blame] | 879 | } |
Jeremy Hylton | 93a569d | 2001-10-17 13:22:22 +0000 | [diff] [blame] | 880 | p = PyString_AS_STRING(c->c_lnotab) + c->c_lnotab_next; |
Guido van Rossum | da4eb5c | 1997-01-24 03:43:35 +0000 | [diff] [blame] | 881 | *p++ = addr; |
| 882 | *p++ = line; |
| 883 | c->c_lnotab_next += 2; |
| 884 | } |
| 885 | |
| 886 | static void |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 887 | com_set_lineno(struct compiling *c, int lineno) |
Guido van Rossum | da4eb5c | 1997-01-24 03:43:35 +0000 | [diff] [blame] | 888 | { |
| 889 | c->c_lineno = lineno; |
| 890 | if (c->c_firstlineno == 0) { |
| 891 | c->c_firstlineno = c->c_last_line = lineno; |
| 892 | } |
| 893 | else { |
| 894 | int incr_addr = c->c_nexti - c->c_last_addr; |
| 895 | int incr_line = lineno - c->c_last_line; |
Tim Peters | 2a7f384 | 2001-06-09 09:26:21 +0000 | [diff] [blame] | 896 | while (incr_addr > 255) { |
| 897 | com_add_lnotab(c, 255, 0); |
| 898 | incr_addr -= 255; |
Guido van Rossum | da4eb5c | 1997-01-24 03:43:35 +0000 | [diff] [blame] | 899 | } |
Tim Peters | 2a7f384 | 2001-06-09 09:26:21 +0000 | [diff] [blame] | 900 | while (incr_line > 255) { |
| 901 | com_add_lnotab(c, incr_addr, 255); |
| 902 | incr_line -=255; |
| 903 | incr_addr = 0; |
| 904 | } |
| 905 | if (incr_addr > 0 || incr_line > 0) |
| 906 | com_add_lnotab(c, incr_addr, incr_line); |
Guido van Rossum | da4eb5c | 1997-01-24 03:43:35 +0000 | [diff] [blame] | 907 | c->c_last_addr = c->c_nexti; |
| 908 | c->c_last_line = lineno; |
| 909 | } |
| 910 | } |
| 911 | |
| 912 | static void |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 913 | com_addoparg(struct compiling *c, int op, int arg) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 914 | { |
Fred Drake | ef8ace3 | 2000-08-24 00:32:09 +0000 | [diff] [blame] | 915 | int extended_arg = arg >> 16; |
Fred Drake | ef8ace3 | 2000-08-24 00:32:09 +0000 | [diff] [blame] | 916 | if (extended_arg){ |
| 917 | com_addbyte(c, EXTENDED_ARG); |
| 918 | com_addint(c, extended_arg); |
| 919 | arg &= 0xffff; |
| 920 | } |
Guido van Rossum | 8e793d9 | 1997-03-03 19:13:14 +0000 | [diff] [blame] | 921 | com_addbyte(c, op); |
| 922 | com_addint(c, arg); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 923 | } |
| 924 | |
| 925 | static void |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 926 | com_addfwref(struct compiling *c, int op, int *p_anchor) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 927 | { |
| 928 | /* Compile a forward reference for backpatching */ |
| 929 | int here; |
| 930 | int anchor; |
| 931 | com_addbyte(c, op); |
| 932 | here = c->c_nexti; |
| 933 | anchor = *p_anchor; |
| 934 | *p_anchor = here; |
| 935 | com_addint(c, anchor == 0 ? 0 : here - anchor); |
| 936 | } |
| 937 | |
| 938 | static void |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 939 | com_backpatch(struct compiling *c, int anchor) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 940 | { |
Jeremy Hylton | 93a569d | 2001-10-17 13:22:22 +0000 | [diff] [blame] | 941 | unsigned char *code = (unsigned char *) PyString_AS_STRING(c->c_code); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 942 | int target = c->c_nexti; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 943 | int dist; |
| 944 | int prev; |
| 945 | for (;;) { |
| 946 | /* Make the JUMP instruction at anchor point to target */ |
Guido van Rossum | d6f3bc2 | 1990-11-18 17:35:03 +0000 | [diff] [blame] | 947 | prev = code[anchor] + (code[anchor+1] << 8); |
| 948 | dist = target - (anchor+2); |
| 949 | code[anchor] = dist & 0xff; |
Fred Drake | ef8ace3 | 2000-08-24 00:32:09 +0000 | [diff] [blame] | 950 | dist >>= 8; |
| 951 | code[anchor+1] = dist; |
| 952 | dist >>= 8; |
| 953 | if (dist) { |
| 954 | com_error(c, PyExc_SystemError, |
| 955 | "com_backpatch: offset too large"); |
| 956 | break; |
| 957 | } |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 958 | if (!prev) |
| 959 | break; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 960 | anchor -= prev; |
| 961 | } |
| 962 | } |
| 963 | |
Guido van Rossum | a9df32a | 1991-12-31 13:13:35 +0000 | [diff] [blame] | 964 | /* Handle literals and names uniformly */ |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 965 | |
| 966 | static int |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 967 | com_add(struct compiling *c, PyObject *list, PyObject *dict, PyObject *v) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 968 | { |
Guido van Rossum | a2ace6a | 2000-04-28 16:42:25 +0000 | [diff] [blame] | 969 | PyObject *w, *t, *np=NULL; |
| 970 | long n; |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 971 | |
Raymond Hettinger | 8ae4689 | 2003-10-12 19:09:37 +0000 | [diff] [blame] | 972 | t = PyTuple_Pack(2, v, v->ob_type); |
Guido van Rossum | a2ace6a | 2000-04-28 16:42:25 +0000 | [diff] [blame] | 973 | if (t == NULL) |
| 974 | goto fail; |
| 975 | w = PyDict_GetItem(dict, t); |
| 976 | if (w != NULL) { |
| 977 | n = PyInt_AsLong(w); |
| 978 | } else { |
| 979 | n = PyList_Size(list); |
| 980 | np = PyInt_FromLong(n); |
| 981 | if (np == NULL) |
| 982 | goto fail; |
| 983 | if (PyList_Append(list, v) != 0) |
| 984 | goto fail; |
| 985 | if (PyDict_SetItem(dict, t, np) != 0) |
| 986 | goto fail; |
| 987 | Py_DECREF(np); |
Guido van Rossum | d6f3bc2 | 1990-11-18 17:35:03 +0000 | [diff] [blame] | 988 | } |
Guido van Rossum | a2ace6a | 2000-04-28 16:42:25 +0000 | [diff] [blame] | 989 | Py_DECREF(t); |
Guido van Rossum | d6f3bc2 | 1990-11-18 17:35:03 +0000 | [diff] [blame] | 990 | return n; |
Guido van Rossum | a2ace6a | 2000-04-28 16:42:25 +0000 | [diff] [blame] | 991 | fail: |
| 992 | Py_XDECREF(np); |
| 993 | Py_XDECREF(t); |
| 994 | c->c_errors++; |
| 995 | return 0; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 996 | } |
| 997 | |
| 998 | static int |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 999 | com_addconst(struct compiling *c, PyObject *v) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1000 | { |
Guido van Rossum | a2ace6a | 2000-04-28 16:42:25 +0000 | [diff] [blame] | 1001 | return com_add(c, c->c_consts, c->c_const_dict, v); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1002 | } |
| 1003 | |
| 1004 | static int |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 1005 | com_addname(struct compiling *c, PyObject *v) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1006 | { |
Guido van Rossum | a2ace6a | 2000-04-28 16:42:25 +0000 | [diff] [blame] | 1007 | return com_add(c, c->c_names, c->c_name_dict, v); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1008 | } |
| 1009 | |
Raymond Hettinger | 0ae0c07 | 2002-06-20 22:23:15 +0000 | [diff] [blame] | 1010 | int |
| 1011 | _Py_Mangle(char *p, char *name, char *buffer, size_t maxlen) |
Guido van Rossum | 8ff077b | 1996-08-24 06:21:31 +0000 | [diff] [blame] | 1012 | { |
Guido van Rossum | d8a6d1c | 1996-08-24 07:54:27 +0000 | [diff] [blame] | 1013 | /* Name mangling: __private becomes _classname__private. |
Guido van Rossum | 8ff077b | 1996-08-24 06:21:31 +0000 | [diff] [blame] | 1014 | This is independent from how the name is used. */ |
Guido van Rossum | 582acec | 2000-06-28 22:07:35 +0000 | [diff] [blame] | 1015 | size_t nlen, plen; |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 1016 | if (p == NULL || name == NULL || name[0] != '_' || name[1] != '_') |
| 1017 | return 0; |
Guido van Rossum | 8ff077b | 1996-08-24 06:21:31 +0000 | [diff] [blame] | 1018 | nlen = strlen(name); |
Guido van Rossum | d8a6d1c | 1996-08-24 07:54:27 +0000 | [diff] [blame] | 1019 | if (nlen+2 >= maxlen) |
Guido van Rossum | 8ff077b | 1996-08-24 06:21:31 +0000 | [diff] [blame] | 1020 | return 0; /* Don't mangle __extremely_long_names */ |
| 1021 | if (name[nlen-1] == '_' && name[nlen-2] == '_') |
| 1022 | return 0; /* Don't mangle __whatever__ */ |
Guido van Rossum | 8ff077b | 1996-08-24 06:21:31 +0000 | [diff] [blame] | 1023 | /* Strip leading underscores from class name */ |
| 1024 | while (*p == '_') |
| 1025 | p++; |
| 1026 | if (*p == '\0') |
| 1027 | return 0; /* Don't mangle if class is just underscores */ |
| 1028 | plen = strlen(p); |
| 1029 | if (plen + nlen >= maxlen) |
Guido van Rossum | d8a6d1c | 1996-08-24 07:54:27 +0000 | [diff] [blame] | 1030 | plen = maxlen-nlen-2; /* Truncate class name if too long */ |
| 1031 | /* buffer = "_" + p[:plen] + name # i.e. 1+plen+nlen bytes */ |
Guido van Rossum | 8ff077b | 1996-08-24 06:21:31 +0000 | [diff] [blame] | 1032 | buffer[0] = '_'; |
| 1033 | strncpy(buffer+1, p, plen); |
Guido van Rossum | d8a6d1c | 1996-08-24 07:54:27 +0000 | [diff] [blame] | 1034 | strcpy(buffer+1+plen, name); |
Guido van Rossum | 8ff077b | 1996-08-24 06:21:31 +0000 | [diff] [blame] | 1035 | return 1; |
| 1036 | } |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 1037 | |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1038 | static void |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 1039 | com_addop_name(struct compiling *c, int op, char *name) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1040 | { |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 1041 | PyObject *v; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1042 | int i; |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 1043 | char buffer[MANGLE_LEN]; |
Jeremy Hylton | eab156f | 2001-01-30 01:24:43 +0000 | [diff] [blame] | 1044 | |
Raymond Hettinger | 0ae0c07 | 2002-06-20 22:23:15 +0000 | [diff] [blame] | 1045 | if (_Py_Mangle(c->c_private, name, buffer, sizeof(buffer))) |
Guido van Rossum | 8ff077b | 1996-08-24 06:21:31 +0000 | [diff] [blame] | 1046 | name = buffer; |
Guido van Rossum | 7b89b6a | 1997-01-18 08:02:57 +0000 | [diff] [blame] | 1047 | if (name == NULL || (v = PyString_InternFromString(name)) == NULL) { |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1048 | c->c_errors++; |
| 1049 | i = 255; |
| 1050 | } |
| 1051 | else { |
| 1052 | i = com_addname(c, v); |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 1053 | Py_DECREF(v); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1054 | } |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 1055 | com_addoparg(c, op, i); |
| 1056 | } |
| 1057 | |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 1058 | #define NAME_LOCAL 0 |
| 1059 | #define NAME_GLOBAL 1 |
| 1060 | #define NAME_DEFAULT 2 |
| 1061 | #define NAME_CLOSURE 3 |
| 1062 | |
| 1063 | static int |
| 1064 | com_lookup_arg(PyObject *dict, PyObject *name) |
| 1065 | { |
| 1066 | PyObject *v = PyDict_GetItem(dict, name); |
| 1067 | if (v == NULL) |
| 1068 | return -1; |
| 1069 | else |
| 1070 | return PyInt_AS_LONG(v); |
| 1071 | } |
| 1072 | |
Guido van Rossum | 3ac99d4 | 2002-08-16 02:13:49 +0000 | [diff] [blame] | 1073 | static int |
| 1074 | none_assignment_check(struct compiling *c, char *name, int assigning) |
| 1075 | { |
| 1076 | if (name[0] == 'N' && strcmp(name, "None") == 0) { |
| 1077 | char *msg; |
| 1078 | if (assigning) |
Michael W. Hudson | 976249b | 2003-01-16 15:39:07 +0000 | [diff] [blame] | 1079 | msg = "assignment to None"; |
Guido van Rossum | 3ac99d4 | 2002-08-16 02:13:49 +0000 | [diff] [blame] | 1080 | else |
| 1081 | msg = "deleting None"; |
| 1082 | if (issue_warning(msg, c->c_filename, c->c_lineno) < 0) { |
| 1083 | c->c_errors++; |
| 1084 | return -1; |
| 1085 | } |
| 1086 | } |
| 1087 | return 0; |
| 1088 | } |
| 1089 | |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 1090 | static void |
| 1091 | com_addop_varname(struct compiling *c, int kind, char *name) |
| 1092 | { |
| 1093 | PyObject *v; |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 1094 | int i, reftype; |
| 1095 | int scope = NAME_DEFAULT; |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 1096 | int op = STOP_CODE; |
| 1097 | char buffer[MANGLE_LEN]; |
| 1098 | |
Guido van Rossum | 3ac99d4 | 2002-08-16 02:13:49 +0000 | [diff] [blame] | 1099 | if (kind != VAR_LOAD && |
| 1100 | none_assignment_check(c, name, kind == VAR_STORE)) |
| 1101 | { |
| 1102 | c->c_errors++; |
| 1103 | i = 255; |
| 1104 | goto done; |
| 1105 | } |
Raymond Hettinger | 0ae0c07 | 2002-06-20 22:23:15 +0000 | [diff] [blame] | 1106 | if (_Py_Mangle(c->c_private, name, buffer, sizeof(buffer))) |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 1107 | name = buffer; |
| 1108 | if (name == NULL || (v = PyString_InternFromString(name)) == NULL) { |
| 1109 | c->c_errors++; |
| 1110 | i = 255; |
| 1111 | goto done; |
Guido van Rossum | c5e9629 | 1991-12-10 13:53:51 +0000 | [diff] [blame] | 1112 | } |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 1113 | |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 1114 | reftype = get_ref_type(c, name); |
| 1115 | switch (reftype) { |
| 1116 | case LOCAL: |
Jeremy Hylton | cb17ae8 | 2001-02-09 22:22:18 +0000 | [diff] [blame] | 1117 | if (c->c_symtable->st_cur->ste_type == TYPE_FUNCTION) |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 1118 | scope = NAME_LOCAL; |
| 1119 | break; |
| 1120 | case GLOBAL_EXPLICIT: |
| 1121 | scope = NAME_GLOBAL; |
| 1122 | break; |
| 1123 | case GLOBAL_IMPLICIT: |
| 1124 | if (c->c_flags & CO_OPTIMIZED) |
| 1125 | scope = NAME_GLOBAL; |
| 1126 | break; |
| 1127 | case FREE: |
| 1128 | case CELL: |
| 1129 | scope = NAME_CLOSURE; |
| 1130 | break; |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 1131 | } |
| 1132 | |
| 1133 | i = com_addname(c, v); |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 1134 | if (scope == NAME_LOCAL) |
| 1135 | i = com_lookup_arg(c->c_locals, v); |
| 1136 | else if (reftype == FREE) |
| 1137 | i = com_lookup_arg(c->c_freevars, v); |
| 1138 | else if (reftype == CELL) |
| 1139 | i = com_lookup_arg(c->c_cellvars, v); |
| 1140 | if (i == -1) { |
| 1141 | c->c_errors++; /* XXX no exception set */ |
| 1142 | i = 255; |
| 1143 | goto done; |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 1144 | } |
| 1145 | Py_DECREF(v); |
| 1146 | |
| 1147 | switch (kind) { |
| 1148 | case VAR_LOAD: |
| 1149 | switch (scope) { |
| 1150 | case NAME_LOCAL: |
| 1151 | op = LOAD_FAST; |
| 1152 | break; |
| 1153 | case NAME_GLOBAL: |
| 1154 | op = LOAD_GLOBAL; |
| 1155 | break; |
| 1156 | case NAME_DEFAULT: |
| 1157 | op = LOAD_NAME; |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 1158 | break; |
| 1159 | case NAME_CLOSURE: |
| 1160 | op = LOAD_DEREF; |
| 1161 | break; |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 1162 | } |
| 1163 | break; |
| 1164 | case VAR_STORE: |
| 1165 | switch (scope) { |
| 1166 | case NAME_LOCAL: |
| 1167 | op = STORE_FAST; |
| 1168 | break; |
| 1169 | case NAME_GLOBAL: |
| 1170 | op = STORE_GLOBAL; |
| 1171 | break; |
| 1172 | case NAME_DEFAULT: |
| 1173 | op = STORE_NAME; |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 1174 | break; |
| 1175 | case NAME_CLOSURE: |
| 1176 | op = STORE_DEREF; |
| 1177 | break; |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 1178 | } |
| 1179 | break; |
| 1180 | case VAR_DELETE: |
| 1181 | switch (scope) { |
| 1182 | case NAME_LOCAL: |
| 1183 | op = DELETE_FAST; |
| 1184 | break; |
| 1185 | case NAME_GLOBAL: |
| 1186 | op = DELETE_GLOBAL; |
| 1187 | break; |
| 1188 | case NAME_DEFAULT: |
| 1189 | op = DELETE_NAME; |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 1190 | break; |
| 1191 | case NAME_CLOSURE: { |
Jeremy Hylton | eab156f | 2001-01-30 01:24:43 +0000 | [diff] [blame] | 1192 | char buf[500]; |
Barry Warsaw | 8f6d868 | 2001-11-28 21:10:39 +0000 | [diff] [blame] | 1193 | PyOS_snprintf(buf, sizeof(buf), |
| 1194 | DEL_CLOSURE_ERROR, name); |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 1195 | com_error(c, PyExc_SyntaxError, buf); |
| 1196 | i = 255; |
| 1197 | break; |
| 1198 | } |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 1199 | } |
| 1200 | break; |
| 1201 | } |
| 1202 | done: |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1203 | com_addoparg(c, op, i); |
| 1204 | } |
| 1205 | |
Guido van Rossum | 1f4fa50 | 1995-01-07 12:41:23 +0000 | [diff] [blame] | 1206 | static void |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 1207 | com_addopname(struct compiling *c, int op, node *n) |
Guido van Rossum | 1f4fa50 | 1995-01-07 12:41:23 +0000 | [diff] [blame] | 1208 | { |
Guido van Rossum | 1f4fa50 | 1995-01-07 12:41:23 +0000 | [diff] [blame] | 1209 | char *name; |
| 1210 | char buffer[1000]; |
| 1211 | /* XXX it is possible to write this code without the 1000 |
| 1212 | chars on the total length of dotted names, I just can't be |
| 1213 | bothered right now */ |
| 1214 | if (TYPE(n) == STAR) |
| 1215 | name = "*"; |
| 1216 | else if (TYPE(n) == dotted_name) { |
| 1217 | char *p = buffer; |
| 1218 | int i; |
| 1219 | name = buffer; |
| 1220 | for (i = 0; i < NCH(n); i += 2) { |
| 1221 | char *s = STR(CHILD(n, i)); |
| 1222 | if (p + strlen(s) > buffer + (sizeof buffer) - 2) { |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 1223 | com_error(c, PyExc_MemoryError, |
Guido van Rossum | 452a983 | 1996-09-17 14:32:04 +0000 | [diff] [blame] | 1224 | "dotted_name too long"); |
Guido van Rossum | d9dfaf5 | 1995-02-17 15:04:57 +0000 | [diff] [blame] | 1225 | name = NULL; |
Guido van Rossum | 1f4fa50 | 1995-01-07 12:41:23 +0000 | [diff] [blame] | 1226 | break; |
| 1227 | } |
| 1228 | if (p != buffer) |
| 1229 | *p++ = '.'; |
| 1230 | strcpy(p, s); |
| 1231 | p = strchr(p, '\0'); |
| 1232 | } |
| 1233 | } |
| 1234 | else { |
| 1235 | REQ(n, NAME); |
| 1236 | name = STR(n); |
| 1237 | } |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 1238 | com_addop_name(c, op, name); |
Guido van Rossum | 1f4fa50 | 1995-01-07 12:41:23 +0000 | [diff] [blame] | 1239 | } |
| 1240 | |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 1241 | static PyObject * |
Guido van Rossum | b081e0c | 2002-08-16 01:57:32 +0000 | [diff] [blame] | 1242 | parsenumber(struct compiling *c, char *s) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1243 | { |
Guido van Rossum | c5e9629 | 1991-12-10 13:53:51 +0000 | [diff] [blame] | 1244 | char *end; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1245 | long x; |
Guido van Rossum | 0ae748d | 1997-02-14 22:58:07 +0000 | [diff] [blame] | 1246 | double dx; |
Guido van Rossum | 50564e8 | 1996-01-12 01:13:16 +0000 | [diff] [blame] | 1247 | #ifndef WITHOUT_COMPLEX |
Guido van Rossum | 50564e8 | 1996-01-12 01:13:16 +0000 | [diff] [blame] | 1248 | int imflag; |
| 1249 | #endif |
| 1250 | |
Guido van Rossum | 282914b | 1991-04-04 10:42:56 +0000 | [diff] [blame] | 1251 | errno = 0; |
Guido van Rossum | c5e9629 | 1991-12-10 13:53:51 +0000 | [diff] [blame] | 1252 | end = s + strlen(s) - 1; |
Guido van Rossum | 50564e8 | 1996-01-12 01:13:16 +0000 | [diff] [blame] | 1253 | #ifndef WITHOUT_COMPLEX |
Guido van Rossum | 15ad9a6 | 1996-01-26 20:53:56 +0000 | [diff] [blame] | 1254 | imflag = *end == 'j' || *end == 'J'; |
Guido van Rossum | 50564e8 | 1996-01-12 01:13:16 +0000 | [diff] [blame] | 1255 | #endif |
Guido van Rossum | f1aeab7 | 1992-03-27 17:28:26 +0000 | [diff] [blame] | 1256 | if (*end == 'l' || *end == 'L') |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 1257 | return PyLong_FromString(s, (char **)0, 0); |
Guido van Rossum | 078151d | 2002-08-11 04:24:12 +0000 | [diff] [blame] | 1258 | if (s[0] == '0') { |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 1259 | x = (long) PyOS_strtoul(s, &end, 0); |
Guido van Rossum | 078151d | 2002-08-11 04:24:12 +0000 | [diff] [blame] | 1260 | if (x < 0 && errno == 0) { |
Guido van Rossum | 6c9e130 | 2003-11-29 23:52:13 +0000 | [diff] [blame] | 1261 | return PyLong_FromString(s, (char **)0, 0); |
Guido van Rossum | 078151d | 2002-08-11 04:24:12 +0000 | [diff] [blame] | 1262 | } |
| 1263 | } |
Guido van Rossum | acbefef | 1992-01-19 16:33:51 +0000 | [diff] [blame] | 1264 | else |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 1265 | x = PyOS_strtol(s, &end, 0); |
Guido van Rossum | 282914b | 1991-04-04 10:42:56 +0000 | [diff] [blame] | 1266 | if (*end == '\0') { |
Jeremy Hylton | 71b6af9 | 2001-08-27 19:45:25 +0000 | [diff] [blame] | 1267 | if (errno != 0) |
| 1268 | return PyLong_FromString(s, (char **)0, 0); |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 1269 | return PyInt_FromLong(x); |
Guido van Rossum | 282914b | 1991-04-04 10:42:56 +0000 | [diff] [blame] | 1270 | } |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 1271 | /* XXX Huge floats may silently fail */ |
Guido van Rossum | 50564e8 | 1996-01-12 01:13:16 +0000 | [diff] [blame] | 1272 | #ifndef WITHOUT_COMPLEX |
| 1273 | if (imflag) { |
Guido van Rossum | b081e0c | 2002-08-16 01:57:32 +0000 | [diff] [blame] | 1274 | Py_complex z; |
| 1275 | z.real = 0.; |
Guido van Rossum | 0ae748d | 1997-02-14 22:58:07 +0000 | [diff] [blame] | 1276 | PyFPE_START_PROTECT("atof", return 0) |
Guido van Rossum | b081e0c | 2002-08-16 01:57:32 +0000 | [diff] [blame] | 1277 | z.imag = atof(s); |
| 1278 | PyFPE_END_PROTECT(z) |
| 1279 | return PyComplex_FromCComplex(z); |
Guido van Rossum | 50564e8 | 1996-01-12 01:13:16 +0000 | [diff] [blame] | 1280 | } |
Guido van Rossum | ac1fc95 | 1997-10-08 15:23:55 +0000 | [diff] [blame] | 1281 | else |
Guido van Rossum | 50564e8 | 1996-01-12 01:13:16 +0000 | [diff] [blame] | 1282 | #endif |
Guido van Rossum | ac1fc95 | 1997-10-08 15:23:55 +0000 | [diff] [blame] | 1283 | { |
Guido van Rossum | 0ae748d | 1997-02-14 22:58:07 +0000 | [diff] [blame] | 1284 | PyFPE_START_PROTECT("atof", return 0) |
| 1285 | dx = atof(s); |
Guido van Rossum | 45b8391 | 1997-03-14 04:32:50 +0000 | [diff] [blame] | 1286 | PyFPE_END_PROTECT(dx) |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 1287 | return PyFloat_FromDouble(dx); |
Guido van Rossum | 0ae748d | 1997-02-14 22:58:07 +0000 | [diff] [blame] | 1288 | } |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1289 | } |
| 1290 | |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 1291 | static PyObject * |
Martin v. Löwis | 00f1e3f | 2002-08-04 17:29:52 +0000 | [diff] [blame] | 1292 | decode_utf8(char **sPtr, char *end, char* encoding) |
| 1293 | { |
Martin v. Löwis | 019934b | 2002-08-07 12:33:18 +0000 | [diff] [blame] | 1294 | #ifndef Py_USING_UNICODE |
Martin v. Löwis | 2863c10 | 2002-08-07 15:18:57 +0000 | [diff] [blame] | 1295 | Py_FatalError("decode_utf8 should not be called in this build."); |
| 1296 | return NULL; |
Martin v. Löwis | 019934b | 2002-08-07 12:33:18 +0000 | [diff] [blame] | 1297 | #else |
Martin v. Löwis | 00f1e3f | 2002-08-04 17:29:52 +0000 | [diff] [blame] | 1298 | PyObject *u, *v; |
| 1299 | char *s, *t; |
| 1300 | t = s = *sPtr; |
| 1301 | /* while (s < end && *s != '\\') s++; */ /* inefficient for u".." */ |
| 1302 | while (s < end && (*s & 0x80)) s++; |
| 1303 | *sPtr = s; |
| 1304 | u = PyUnicode_DecodeUTF8(t, s - t, NULL); |
| 1305 | if (u == NULL) |
| 1306 | return NULL; |
| 1307 | v = PyUnicode_AsEncodedString(u, encoding, NULL); |
| 1308 | Py_DECREF(u); |
| 1309 | return v; |
Martin v. Löwis | 019934b | 2002-08-07 12:33:18 +0000 | [diff] [blame] | 1310 | #endif |
Martin v. Löwis | 00f1e3f | 2002-08-04 17:29:52 +0000 | [diff] [blame] | 1311 | } |
| 1312 | |
Jeremy Hylton | accb62b | 2002-12-31 18:17:44 +0000 | [diff] [blame] | 1313 | /* compiler.transformer.Transformer.decode_literal depends on what |
| 1314 | might seem like minor details of this function -- changes here |
| 1315 | must be reflected there. */ |
Martin v. Löwis | 00f1e3f | 2002-08-04 17:29:52 +0000 | [diff] [blame] | 1316 | static PyObject * |
Guido van Rossum | b081e0c | 2002-08-16 01:57:32 +0000 | [diff] [blame] | 1317 | parsestr(struct compiling *c, char *s) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1318 | { |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 1319 | PyObject *v; |
Guido van Rossum | 582acec | 2000-06-28 22:07:35 +0000 | [diff] [blame] | 1320 | size_t len; |
Martin v. Löwis | 8a8da79 | 2002-08-14 07:46:28 +0000 | [diff] [blame] | 1321 | int quote = *s; |
Guido van Rossum | 5aa88f0 | 2000-03-10 23:01:36 +0000 | [diff] [blame] | 1322 | int rawmode = 0; |
Guido van Rossum | b081e0c | 2002-08-16 01:57:32 +0000 | [diff] [blame] | 1323 | char* encoding = ((c == NULL) ? NULL : c->c_encoding); |
Martin v. Löwis | 00f1e3f | 2002-08-04 17:29:52 +0000 | [diff] [blame] | 1324 | int need_encoding; |
Guido van Rossum | 5aa88f0 | 2000-03-10 23:01:36 +0000 | [diff] [blame] | 1325 | int unicode = 0; |
Guido van Rossum | 05459c5 | 2002-05-28 18:47:29 +0000 | [diff] [blame] | 1326 | |
Guido van Rossum | 5aa88f0 | 2000-03-10 23:01:36 +0000 | [diff] [blame] | 1327 | if (isalpha(quote) || quote == '_') { |
| 1328 | if (quote == 'u' || quote == 'U') { |
| 1329 | quote = *++s; |
| 1330 | unicode = 1; |
| 1331 | } |
| 1332 | if (quote == 'r' || quote == 'R') { |
| 1333 | quote = *++s; |
| 1334 | rawmode = 1; |
| 1335 | } |
| 1336 | } |
Guido van Rossum | 8054fad | 1993-10-26 15:19:44 +0000 | [diff] [blame] | 1337 | if (quote != '\'' && quote != '\"') { |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 1338 | PyErr_BadInternalCall(); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1339 | return NULL; |
| 1340 | } |
| 1341 | s++; |
| 1342 | len = strlen(s); |
Guido van Rossum | 582acec | 2000-06-28 22:07:35 +0000 | [diff] [blame] | 1343 | if (len > INT_MAX) { |
Guido van Rossum | b081e0c | 2002-08-16 01:57:32 +0000 | [diff] [blame] | 1344 | com_error(c, PyExc_OverflowError, |
Martin v. Löwis | cfeb3b6 | 2002-03-03 21:30:27 +0000 | [diff] [blame] | 1345 | "string to parse is too long"); |
Guido van Rossum | 582acec | 2000-06-28 22:07:35 +0000 | [diff] [blame] | 1346 | return NULL; |
| 1347 | } |
Guido van Rossum | 8054fad | 1993-10-26 15:19:44 +0000 | [diff] [blame] | 1348 | if (s[--len] != quote) { |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 1349 | PyErr_BadInternalCall(); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1350 | return NULL; |
| 1351 | } |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 1352 | if (len >= 4 && s[0] == quote && s[1] == quote) { |
| 1353 | s += 2; |
| 1354 | len -= 2; |
| 1355 | if (s[--len] != quote || s[--len] != quote) { |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 1356 | PyErr_BadInternalCall(); |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 1357 | return NULL; |
| 1358 | } |
| 1359 | } |
Martin v. Löwis | 339d0f7 | 2001-08-17 18:39:25 +0000 | [diff] [blame] | 1360 | #ifdef Py_USING_UNICODE |
Guido van Rossum | fdc8bdb | 2000-05-01 17:54:56 +0000 | [diff] [blame] | 1361 | if (unicode || Py_UnicodeFlag) { |
Martin v. Löwis | 00f1e3f | 2002-08-04 17:29:52 +0000 | [diff] [blame] | 1362 | PyObject *u, *w; |
Walter Dörwald | 4c6c765 | 2002-11-21 20:13:40 +0000 | [diff] [blame] | 1363 | char *buf; |
| 1364 | char *p; |
| 1365 | char *end; |
Martin v. Löwis | 00f1e3f | 2002-08-04 17:29:52 +0000 | [diff] [blame] | 1366 | if (encoding == NULL) { |
| 1367 | buf = s; |
| 1368 | u = NULL; |
| 1369 | } else if (strcmp(encoding, "iso-8859-1") == 0) { |
| 1370 | buf = s; |
| 1371 | u = NULL; |
| 1372 | } else { |
| 1373 | /* "\XX" may become "\u005c\uHHLL" (12 bytes) */ |
| 1374 | u = PyString_FromStringAndSize((char *)NULL, len * 4); |
| 1375 | if (u == NULL) |
| 1376 | return NULL; |
| 1377 | p = buf = PyString_AsString(u); |
| 1378 | end = s + len; |
| 1379 | while (s < end) { |
| 1380 | if (*s == '\\') { |
| 1381 | *p++ = *s++; |
| 1382 | if (*s & 0x80) { |
| 1383 | strcpy(p, "u005c"); |
| 1384 | p += 5; |
| 1385 | } |
| 1386 | } |
| 1387 | if (*s & 0x80) { /* XXX inefficient */ |
| 1388 | char *r; |
| 1389 | int rn, i; |
| 1390 | w = decode_utf8(&s, end, "utf-16-be"); |
| 1391 | if (w == NULL) { |
| 1392 | Py_DECREF(u); |
| 1393 | return NULL; |
| 1394 | } |
| 1395 | r = PyString_AsString(w); |
| 1396 | rn = PyString_Size(w); |
| 1397 | assert(rn % 2 == 0); |
| 1398 | for (i = 0; i < rn; i += 2) { |
| 1399 | sprintf(p, "\\u%02x%02x", |
| 1400 | r[i + 0] & 0xFF, |
| 1401 | r[i + 1] & 0xFF); |
| 1402 | p += 6; |
| 1403 | } |
| 1404 | Py_DECREF(w); |
| 1405 | } else { |
| 1406 | *p++ = *s++; |
| 1407 | } |
| 1408 | } |
| 1409 | len = p - buf; |
| 1410 | } |
Guido van Rossum | 5aa88f0 | 2000-03-10 23:01:36 +0000 | [diff] [blame] | 1411 | if (rawmode) |
Martin v. Löwis | 00f1e3f | 2002-08-04 17:29:52 +0000 | [diff] [blame] | 1412 | v = PyUnicode_DecodeRawUnicodeEscape(buf, len, NULL); |
Guido van Rossum | 5aa88f0 | 2000-03-10 23:01:36 +0000 | [diff] [blame] | 1413 | else |
Martin v. Löwis | 00f1e3f | 2002-08-04 17:29:52 +0000 | [diff] [blame] | 1414 | v = PyUnicode_DecodeUnicodeEscape(buf, len, NULL); |
| 1415 | Py_XDECREF(u); |
Martin v. Löwis | cfeb3b6 | 2002-03-03 21:30:27 +0000 | [diff] [blame] | 1416 | if (v == NULL) |
Guido van Rossum | b081e0c | 2002-08-16 01:57:32 +0000 | [diff] [blame] | 1417 | PyErr_SyntaxLocation(c->c_filename, c->c_lineno); |
Martin v. Löwis | cfeb3b6 | 2002-03-03 21:30:27 +0000 | [diff] [blame] | 1418 | return v; |
| 1419 | |
Guido van Rossum | 5aa88f0 | 2000-03-10 23:01:36 +0000 | [diff] [blame] | 1420 | } |
Martin v. Löwis | 339d0f7 | 2001-08-17 18:39:25 +0000 | [diff] [blame] | 1421 | #endif |
Martin v. Löwis | 00f1e3f | 2002-08-04 17:29:52 +0000 | [diff] [blame] | 1422 | need_encoding = (encoding != NULL && |
| 1423 | strcmp(encoding, "utf-8") != 0 && |
| 1424 | strcmp(encoding, "iso-8859-1") != 0); |
| 1425 | if (rawmode || strchr(s, '\\') == NULL) { |
| 1426 | if (need_encoding) { |
Martin v. Löwis | 019934b | 2002-08-07 12:33:18 +0000 | [diff] [blame] | 1427 | #ifndef Py_USING_UNICODE |
| 1428 | /* This should not happen - we never see any other |
| 1429 | encoding. */ |
Martin v. Löwis | 2863c10 | 2002-08-07 15:18:57 +0000 | [diff] [blame] | 1430 | Py_FatalError("cannot deal with encodings in this build."); |
Martin v. Löwis | 019934b | 2002-08-07 12:33:18 +0000 | [diff] [blame] | 1431 | #else |
Martin v. Löwis | 00f1e3f | 2002-08-04 17:29:52 +0000 | [diff] [blame] | 1432 | PyObject* u = PyUnicode_DecodeUTF8(s, len, NULL); |
| 1433 | if (u == NULL) |
| 1434 | return NULL; |
| 1435 | v = PyUnicode_AsEncodedString(u, encoding, NULL); |
| 1436 | Py_DECREF(u); |
| 1437 | return v; |
Martin v. Löwis | 019934b | 2002-08-07 12:33:18 +0000 | [diff] [blame] | 1438 | #endif |
Martin v. Löwis | 00f1e3f | 2002-08-04 17:29:52 +0000 | [diff] [blame] | 1439 | } else { |
| 1440 | return PyString_FromStringAndSize(s, len); |
| 1441 | } |
| 1442 | } |
Martin v. Löwis | 8a8da79 | 2002-08-14 07:46:28 +0000 | [diff] [blame] | 1443 | |
| 1444 | v = PyString_DecodeEscape(s, len, NULL, unicode, |
| 1445 | need_encoding ? encoding : NULL); |
Fredrik Lundh | 1fa0b89 | 2000-09-02 20:11:27 +0000 | [diff] [blame] | 1446 | if (v == NULL) |
Guido van Rossum | b081e0c | 2002-08-16 01:57:32 +0000 | [diff] [blame] | 1447 | PyErr_SyntaxLocation(c->c_filename, c->c_lineno); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1448 | return v; |
| 1449 | } |
| 1450 | |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 1451 | static PyObject * |
Martin v. Löwis | 339d0f7 | 2001-08-17 18:39:25 +0000 | [diff] [blame] | 1452 | parsestrplus(struct compiling* c, node *n) |
Guido van Rossum | 1f4fa50 | 1995-01-07 12:41:23 +0000 | [diff] [blame] | 1453 | { |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 1454 | PyObject *v; |
Guido van Rossum | 1f4fa50 | 1995-01-07 12:41:23 +0000 | [diff] [blame] | 1455 | int i; |
| 1456 | REQ(CHILD(n, 0), STRING); |
Martin v. Löwis | 339d0f7 | 2001-08-17 18:39:25 +0000 | [diff] [blame] | 1457 | if ((v = parsestr(c, STR(CHILD(n, 0)))) != NULL) { |
Guido van Rossum | 1f4fa50 | 1995-01-07 12:41:23 +0000 | [diff] [blame] | 1458 | /* String literal concatenation */ |
Fred Drake | 4e998bc | 2000-04-13 14:10:44 +0000 | [diff] [blame] | 1459 | for (i = 1; i < NCH(n); i++) { |
| 1460 | PyObject *s; |
Martin v. Löwis | 339d0f7 | 2001-08-17 18:39:25 +0000 | [diff] [blame] | 1461 | s = parsestr(c, STR(CHILD(n, i))); |
Fred Drake | 4e998bc | 2000-04-13 14:10:44 +0000 | [diff] [blame] | 1462 | if (s == NULL) |
| 1463 | goto onError; |
| 1464 | if (PyString_Check(v) && PyString_Check(s)) { |
| 1465 | PyString_ConcatAndDel(&v, s); |
| 1466 | if (v == NULL) |
| 1467 | goto onError; |
| 1468 | } |
Martin v. Löwis | 339d0f7 | 2001-08-17 18:39:25 +0000 | [diff] [blame] | 1469 | #ifdef Py_USING_UNICODE |
Fred Drake | 4e998bc | 2000-04-13 14:10:44 +0000 | [diff] [blame] | 1470 | else { |
| 1471 | PyObject *temp; |
| 1472 | temp = PyUnicode_Concat(v, s); |
| 1473 | Py_DECREF(s); |
| 1474 | if (temp == NULL) |
| 1475 | goto onError; |
| 1476 | Py_DECREF(v); |
| 1477 | v = temp; |
| 1478 | } |
Martin v. Löwis | 339d0f7 | 2001-08-17 18:39:25 +0000 | [diff] [blame] | 1479 | #endif |
Guido van Rossum | 1f4fa50 | 1995-01-07 12:41:23 +0000 | [diff] [blame] | 1480 | } |
| 1481 | } |
| 1482 | return v; |
Fred Drake | 4e998bc | 2000-04-13 14:10:44 +0000 | [diff] [blame] | 1483 | |
| 1484 | onError: |
| 1485 | Py_XDECREF(v); |
| 1486 | return NULL; |
Guido van Rossum | 1f4fa50 | 1995-01-07 12:41:23 +0000 | [diff] [blame] | 1487 | } |
| 1488 | |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1489 | static void |
Skip Montanaro | 803d6e5 | 2000-08-12 18:09:51 +0000 | [diff] [blame] | 1490 | com_list_for(struct compiling *c, node *n, node *e, char *t) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1491 | { |
Skip Montanaro | 803d6e5 | 2000-08-12 18:09:51 +0000 | [diff] [blame] | 1492 | int anchor = 0; |
| 1493 | int save_begin = c->c_begin; |
| 1494 | |
| 1495 | /* list_iter: for v in expr [list_iter] */ |
| 1496 | com_node(c, CHILD(n, 3)); /* expr */ |
Guido van Rossum | 59d1d2b | 2001-04-20 19:13:02 +0000 | [diff] [blame] | 1497 | com_addbyte(c, GET_ITER); |
Skip Montanaro | 803d6e5 | 2000-08-12 18:09:51 +0000 | [diff] [blame] | 1498 | c->c_begin = c->c_nexti; |
Guido van Rossum | 59d1d2b | 2001-04-20 19:13:02 +0000 | [diff] [blame] | 1499 | com_addfwref(c, FOR_ITER, &anchor); |
Skip Montanaro | 803d6e5 | 2000-08-12 18:09:51 +0000 | [diff] [blame] | 1500 | com_push(c, 1); |
Thomas Wouters | 434d082 | 2000-08-24 20:11:32 +0000 | [diff] [blame] | 1501 | com_assign(c, CHILD(n, 1), OP_ASSIGN, NULL); |
Skip Montanaro | 803d6e5 | 2000-08-12 18:09:51 +0000 | [diff] [blame] | 1502 | c->c_loops++; |
| 1503 | com_list_iter(c, n, e, t); |
| 1504 | c->c_loops--; |
| 1505 | com_addoparg(c, JUMP_ABSOLUTE, c->c_begin); |
| 1506 | c->c_begin = save_begin; |
| 1507 | com_backpatch(c, anchor); |
Guido van Rossum | 59d1d2b | 2001-04-20 19:13:02 +0000 | [diff] [blame] | 1508 | com_pop(c, 1); /* FOR_ITER has popped this */ |
Skip Montanaro | 803d6e5 | 2000-08-12 18:09:51 +0000 | [diff] [blame] | 1509 | } |
| 1510 | |
| 1511 | static void |
| 1512 | com_list_if(struct compiling *c, node *n, node *e, char *t) |
| 1513 | { |
| 1514 | int anchor = 0; |
| 1515 | int a = 0; |
| 1516 | /* list_iter: 'if' test [list_iter] */ |
Skip Montanaro | 803d6e5 | 2000-08-12 18:09:51 +0000 | [diff] [blame] | 1517 | com_node(c, CHILD(n, 1)); |
| 1518 | com_addfwref(c, JUMP_IF_FALSE, &a); |
| 1519 | com_addbyte(c, POP_TOP); |
| 1520 | com_pop(c, 1); |
| 1521 | com_list_iter(c, n, e, t); |
| 1522 | com_addfwref(c, JUMP_FORWARD, &anchor); |
| 1523 | com_backpatch(c, a); |
| 1524 | /* We jump here with an extra entry which we now pop */ |
| 1525 | com_addbyte(c, POP_TOP); |
| 1526 | com_backpatch(c, anchor); |
| 1527 | } |
| 1528 | |
| 1529 | static void |
| 1530 | com_list_iter(struct compiling *c, |
| 1531 | node *p, /* parent of list_iter node */ |
| 1532 | node *e, /* element expression node */ |
| 1533 | char *t /* name of result list temp local */) |
| 1534 | { |
| 1535 | /* list_iter is the last child in a listmaker, list_for, or list_if */ |
| 1536 | node *n = CHILD(p, NCH(p)-1); |
| 1537 | if (TYPE(n) == list_iter) { |
| 1538 | n = CHILD(n, 0); |
| 1539 | switch (TYPE(n)) { |
| 1540 | case list_for: |
| 1541 | com_list_for(c, n, e, t); |
| 1542 | break; |
| 1543 | case list_if: |
| 1544 | com_list_if(c, n, e, t); |
| 1545 | break; |
| 1546 | default: |
| 1547 | com_error(c, PyExc_SystemError, |
| 1548 | "invalid list_iter node type"); |
| 1549 | } |
| 1550 | } |
| 1551 | else { |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 1552 | com_addop_varname(c, VAR_LOAD, t); |
Skip Montanaro | 803d6e5 | 2000-08-12 18:09:51 +0000 | [diff] [blame] | 1553 | com_push(c, 1); |
| 1554 | com_node(c, e); |
| 1555 | com_addoparg(c, CALL_FUNCTION, 1); |
| 1556 | com_addbyte(c, POP_TOP); |
| 1557 | com_pop(c, 2); |
| 1558 | } |
| 1559 | } |
| 1560 | |
| 1561 | static void |
| 1562 | com_list_comprehension(struct compiling *c, node *n) |
| 1563 | { |
Skip Montanaro | 46dfa5f | 2000-08-22 02:43:07 +0000 | [diff] [blame] | 1564 | /* listmaker: test list_for */ |
Barry Warsaw | 8f6d868 | 2001-11-28 21:10:39 +0000 | [diff] [blame] | 1565 | char tmpname[30]; |
Jeremy Hylton | 4d508ad | 2003-05-21 17:34:50 +0000 | [diff] [blame] | 1566 | |
| 1567 | REQ(n, listmaker); |
Barry Warsaw | 8f6d868 | 2001-11-28 21:10:39 +0000 | [diff] [blame] | 1568 | PyOS_snprintf(tmpname, sizeof(tmpname), "_[%d]", ++c->c_tmpname); |
Skip Montanaro | 803d6e5 | 2000-08-12 18:09:51 +0000 | [diff] [blame] | 1569 | com_addoparg(c, BUILD_LIST, 0); |
| 1570 | com_addbyte(c, DUP_TOP); /* leave the result on the stack */ |
| 1571 | com_push(c, 2); |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 1572 | com_addop_name(c, LOAD_ATTR, "append"); |
| 1573 | com_addop_varname(c, VAR_STORE, tmpname); |
Skip Montanaro | 803d6e5 | 2000-08-12 18:09:51 +0000 | [diff] [blame] | 1574 | com_pop(c, 1); |
Skip Montanaro | 46dfa5f | 2000-08-22 02:43:07 +0000 | [diff] [blame] | 1575 | com_list_for(c, CHILD(n, 1), CHILD(n, 0), tmpname); |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 1576 | com_addop_varname(c, VAR_DELETE, tmpname); |
Skip Montanaro | 803d6e5 | 2000-08-12 18:09:51 +0000 | [diff] [blame] | 1577 | --c->c_tmpname; |
| 1578 | } |
| 1579 | |
| 1580 | static void |
| 1581 | com_listmaker(struct compiling *c, node *n) |
| 1582 | { |
Skip Montanaro | 46dfa5f | 2000-08-22 02:43:07 +0000 | [diff] [blame] | 1583 | /* listmaker: test ( list_for | (',' test)* [','] ) */ |
| 1584 | if (NCH(n) > 1 && TYPE(CHILD(n, 1)) == list_for) |
Skip Montanaro | 803d6e5 | 2000-08-12 18:09:51 +0000 | [diff] [blame] | 1585 | com_list_comprehension(c, n); |
| 1586 | else { |
| 1587 | int len = 0; |
| 1588 | int i; |
| 1589 | for (i = 0; i < NCH(n); i += 2, len++) |
| 1590 | com_node(c, CHILD(n, i)); |
| 1591 | com_addoparg(c, BUILD_LIST, len); |
| 1592 | com_pop(c, len-1); |
| 1593 | } |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1594 | } |
| 1595 | |
| 1596 | static void |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 1597 | com_dictmaker(struct compiling *c, node *n) |
Guido van Rossum | 4bad92c | 1991-07-27 21:34:52 +0000 | [diff] [blame] | 1598 | { |
| 1599 | int i; |
| 1600 | /* dictmaker: test ':' test (',' test ':' value)* [','] */ |
| 1601 | for (i = 0; i+2 < NCH(n); i += 4) { |
| 1602 | /* We must arrange things just right for STORE_SUBSCR. |
| 1603 | It wants the stack to look like (value) (dict) (key) */ |
| 1604 | com_addbyte(c, DUP_TOP); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 1605 | com_push(c, 1); |
Guido van Rossum | 4bad92c | 1991-07-27 21:34:52 +0000 | [diff] [blame] | 1606 | com_node(c, CHILD(n, i)); /* key */ |
Gustavo Niemeyer | 78429a6 | 2002-12-16 13:54:02 +0000 | [diff] [blame] | 1607 | com_node(c, CHILD(n, i+2)); /* value */ |
| 1608 | com_addbyte(c, ROT_THREE); |
Guido van Rossum | 4bad92c | 1991-07-27 21:34:52 +0000 | [diff] [blame] | 1609 | com_addbyte(c, STORE_SUBSCR); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 1610 | com_pop(c, 3); |
Guido van Rossum | 4bad92c | 1991-07-27 21:34:52 +0000 | [diff] [blame] | 1611 | } |
| 1612 | } |
| 1613 | |
| 1614 | static void |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 1615 | com_atom(struct compiling *c, node *n) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1616 | { |
| 1617 | node *ch; |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 1618 | PyObject *v; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1619 | int i; |
| 1620 | REQ(n, atom); |
| 1621 | ch = CHILD(n, 0); |
| 1622 | switch (TYPE(ch)) { |
| 1623 | case LPAR: |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 1624 | if (TYPE(CHILD(n, 1)) == RPAR) { |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1625 | com_addoparg(c, BUILD_TUPLE, 0); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 1626 | com_push(c, 1); |
| 1627 | } |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1628 | else |
| 1629 | com_node(c, CHILD(n, 1)); |
| 1630 | break; |
Skip Montanaro | 803d6e5 | 2000-08-12 18:09:51 +0000 | [diff] [blame] | 1631 | case LSQB: /* '[' [listmaker] ']' */ |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 1632 | if (TYPE(CHILD(n, 1)) == RSQB) { |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1633 | com_addoparg(c, BUILD_LIST, 0); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 1634 | com_push(c, 1); |
| 1635 | } |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1636 | else |
Skip Montanaro | 803d6e5 | 2000-08-12 18:09:51 +0000 | [diff] [blame] | 1637 | com_listmaker(c, CHILD(n, 1)); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1638 | break; |
Guido van Rossum | 4bad92c | 1991-07-27 21:34:52 +0000 | [diff] [blame] | 1639 | case LBRACE: /* '{' [dictmaker] '}' */ |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1640 | com_addoparg(c, BUILD_MAP, 0); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 1641 | com_push(c, 1); |
Skip Montanaro | 803d6e5 | 2000-08-12 18:09:51 +0000 | [diff] [blame] | 1642 | if (TYPE(CHILD(n, 1)) == dictmaker) |
Guido van Rossum | 4bad92c | 1991-07-27 21:34:52 +0000 | [diff] [blame] | 1643 | com_dictmaker(c, CHILD(n, 1)); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1644 | break; |
| 1645 | case BACKQUOTE: |
| 1646 | com_node(c, CHILD(n, 1)); |
| 1647 | com_addbyte(c, UNARY_CONVERT); |
| 1648 | break; |
| 1649 | case NUMBER: |
Guido van Rossum | 452a983 | 1996-09-17 14:32:04 +0000 | [diff] [blame] | 1650 | if ((v = parsenumber(c, STR(ch))) == NULL) { |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1651 | i = 255; |
| 1652 | } |
| 1653 | else { |
| 1654 | i = com_addconst(c, v); |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 1655 | Py_DECREF(v); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1656 | } |
| 1657 | com_addoparg(c, LOAD_CONST, i); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 1658 | com_push(c, 1); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1659 | break; |
| 1660 | case STRING: |
Martin v. Löwis | 339d0f7 | 2001-08-17 18:39:25 +0000 | [diff] [blame] | 1661 | v = parsestrplus(c, n); |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 1662 | if (v == NULL) { |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1663 | c->c_errors++; |
| 1664 | i = 255; |
| 1665 | } |
| 1666 | else { |
| 1667 | i = com_addconst(c, v); |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 1668 | Py_DECREF(v); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1669 | } |
| 1670 | com_addoparg(c, LOAD_CONST, i); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 1671 | com_push(c, 1); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1672 | break; |
| 1673 | case NAME: |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 1674 | com_addop_varname(c, VAR_LOAD, STR(ch)); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 1675 | com_push(c, 1); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1676 | break; |
| 1677 | default: |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 1678 | com_error(c, PyExc_SystemError, |
| 1679 | "com_atom: unexpected node type"); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1680 | } |
| 1681 | } |
| 1682 | |
| 1683 | static void |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 1684 | com_slice(struct compiling *c, node *n, int op) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1685 | { |
| 1686 | if (NCH(n) == 1) { |
| 1687 | com_addbyte(c, op); |
| 1688 | } |
| 1689 | else if (NCH(n) == 2) { |
| 1690 | if (TYPE(CHILD(n, 0)) != COLON) { |
| 1691 | com_node(c, CHILD(n, 0)); |
| 1692 | com_addbyte(c, op+1); |
| 1693 | } |
| 1694 | else { |
| 1695 | com_node(c, CHILD(n, 1)); |
| 1696 | com_addbyte(c, op+2); |
| 1697 | } |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 1698 | com_pop(c, 1); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1699 | } |
| 1700 | else { |
| 1701 | com_node(c, CHILD(n, 0)); |
| 1702 | com_node(c, CHILD(n, 2)); |
| 1703 | com_addbyte(c, op+3); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 1704 | com_pop(c, 2); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1705 | } |
| 1706 | } |
| 1707 | |
Guido van Rossum | 635abd2 | 1997-01-06 22:56:52 +0000 | [diff] [blame] | 1708 | static void |
Thomas Wouters | 434d082 | 2000-08-24 20:11:32 +0000 | [diff] [blame] | 1709 | com_augassign_slice(struct compiling *c, node *n, int opcode, node *augn) |
| 1710 | { |
| 1711 | if (NCH(n) == 1) { |
| 1712 | com_addbyte(c, DUP_TOP); |
| 1713 | com_push(c, 1); |
| 1714 | com_addbyte(c, SLICE); |
| 1715 | com_node(c, augn); |
| 1716 | com_addbyte(c, opcode); |
| 1717 | com_pop(c, 1); |
| 1718 | com_addbyte(c, ROT_TWO); |
| 1719 | com_addbyte(c, STORE_SLICE); |
| 1720 | com_pop(c, 2); |
| 1721 | } else if (NCH(n) == 2 && TYPE(CHILD(n, 0)) != COLON) { |
| 1722 | com_node(c, CHILD(n, 0)); |
| 1723 | com_addoparg(c, DUP_TOPX, 2); |
| 1724 | com_push(c, 2); |
| 1725 | com_addbyte(c, SLICE+1); |
| 1726 | com_pop(c, 1); |
| 1727 | com_node(c, augn); |
| 1728 | com_addbyte(c, opcode); |
| 1729 | com_pop(c, 1); |
| 1730 | com_addbyte(c, ROT_THREE); |
| 1731 | com_addbyte(c, STORE_SLICE+1); |
| 1732 | com_pop(c, 3); |
| 1733 | } else if (NCH(n) == 2) { |
| 1734 | com_node(c, CHILD(n, 1)); |
| 1735 | com_addoparg(c, DUP_TOPX, 2); |
| 1736 | com_push(c, 2); |
| 1737 | com_addbyte(c, SLICE+2); |
| 1738 | com_pop(c, 1); |
| 1739 | com_node(c, augn); |
| 1740 | com_addbyte(c, opcode); |
| 1741 | com_pop(c, 1); |
| 1742 | com_addbyte(c, ROT_THREE); |
| 1743 | com_addbyte(c, STORE_SLICE+2); |
| 1744 | com_pop(c, 3); |
| 1745 | } else { |
| 1746 | com_node(c, CHILD(n, 0)); |
| 1747 | com_node(c, CHILD(n, 2)); |
| 1748 | com_addoparg(c, DUP_TOPX, 3); |
| 1749 | com_push(c, 3); |
| 1750 | com_addbyte(c, SLICE+3); |
| 1751 | com_pop(c, 2); |
| 1752 | com_node(c, augn); |
| 1753 | com_addbyte(c, opcode); |
| 1754 | com_pop(c, 1); |
| 1755 | com_addbyte(c, ROT_FOUR); |
| 1756 | com_addbyte(c, STORE_SLICE+3); |
| 1757 | com_pop(c, 4); |
| 1758 | } |
| 1759 | } |
| 1760 | |
| 1761 | static void |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 1762 | com_argument(struct compiling *c, node *n, PyObject **pkeywords) |
Guido van Rossum | f10570b | 1995-07-07 22:53:21 +0000 | [diff] [blame] | 1763 | { |
| 1764 | node *m; |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 1765 | REQ(n, argument); /* [test '='] test; really [keyword '='] test */ |
Guido van Rossum | f10570b | 1995-07-07 22:53:21 +0000 | [diff] [blame] | 1766 | if (NCH(n) == 1) { |
Guido van Rossum | 635abd2 | 1997-01-06 22:56:52 +0000 | [diff] [blame] | 1767 | if (*pkeywords != NULL) { |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 1768 | com_error(c, PyExc_SyntaxError, |
Fred Drake | dcf08e0 | 2000-08-15 15:49:44 +0000 | [diff] [blame] | 1769 | "non-keyword arg after keyword arg"); |
Guido van Rossum | f10570b | 1995-07-07 22:53:21 +0000 | [diff] [blame] | 1770 | } |
| 1771 | else { |
| 1772 | com_node(c, CHILD(n, 0)); |
| 1773 | } |
Guido van Rossum | 635abd2 | 1997-01-06 22:56:52 +0000 | [diff] [blame] | 1774 | return; |
Guido van Rossum | f10570b | 1995-07-07 22:53:21 +0000 | [diff] [blame] | 1775 | } |
| 1776 | m = n; |
| 1777 | do { |
| 1778 | m = CHILD(m, 0); |
| 1779 | } while (NCH(m) == 1); |
| 1780 | if (TYPE(m) != NAME) { |
Tim Peters | 4e30378 | 2001-02-18 04:45:10 +0000 | [diff] [blame] | 1781 | /* f(lambda x: x[0] = 3) ends up getting parsed with |
| 1782 | * LHS test = lambda x: x[0], and RHS test = 3. |
| 1783 | * SF bug 132313 points out that complaining about a keyword |
| 1784 | * then is very confusing. |
| 1785 | */ |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 1786 | com_error(c, PyExc_SyntaxError, |
Tim Peters | 4e30378 | 2001-02-18 04:45:10 +0000 | [diff] [blame] | 1787 | TYPE(m) == lambdef ? |
| 1788 | "lambda cannot contain assignment" : |
| 1789 | "keyword can't be an expression"); |
Guido van Rossum | f10570b | 1995-07-07 22:53:21 +0000 | [diff] [blame] | 1790 | } |
| 1791 | else { |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 1792 | PyObject *v = PyString_InternFromString(STR(m)); |
Guido van Rossum | 63dd79a | 2002-08-16 02:24:56 +0000 | [diff] [blame] | 1793 | (void) none_assignment_check(c, STR(m), 1); |
Guido van Rossum | 635abd2 | 1997-01-06 22:56:52 +0000 | [diff] [blame] | 1794 | if (v != NULL && *pkeywords == NULL) |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 1795 | *pkeywords = PyDict_New(); |
Jeremy Hylton | 39e2f3f | 2001-02-28 01:58:08 +0000 | [diff] [blame] | 1796 | if (v == NULL) |
Guido van Rossum | f10570b | 1995-07-07 22:53:21 +0000 | [diff] [blame] | 1797 | c->c_errors++; |
Jeremy Hylton | 39e2f3f | 2001-02-28 01:58:08 +0000 | [diff] [blame] | 1798 | else if (*pkeywords == NULL) { |
| 1799 | c->c_errors++; |
| 1800 | Py_DECREF(v); |
| 1801 | } else { |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 1802 | if (PyDict_GetItem(*pkeywords, v) != NULL) |
| 1803 | com_error(c, PyExc_SyntaxError, |
Guido van Rossum | 635abd2 | 1997-01-06 22:56:52 +0000 | [diff] [blame] | 1804 | "duplicate keyword argument"); |
| 1805 | else |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 1806 | if (PyDict_SetItem(*pkeywords, v, v) != 0) |
Guido van Rossum | 635abd2 | 1997-01-06 22:56:52 +0000 | [diff] [blame] | 1807 | c->c_errors++; |
Guido van Rossum | f10570b | 1995-07-07 22:53:21 +0000 | [diff] [blame] | 1808 | com_addoparg(c, LOAD_CONST, com_addconst(c, v)); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 1809 | com_push(c, 1); |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 1810 | Py_DECREF(v); |
Guido van Rossum | f10570b | 1995-07-07 22:53:21 +0000 | [diff] [blame] | 1811 | } |
| 1812 | } |
| 1813 | com_node(c, CHILD(n, 2)); |
Guido van Rossum | f10570b | 1995-07-07 22:53:21 +0000 | [diff] [blame] | 1814 | } |
| 1815 | |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1816 | static void |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 1817 | com_call_function(struct compiling *c, node *n) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1818 | { |
| 1819 | if (TYPE(n) == RPAR) { |
Guido van Rossum | f10570b | 1995-07-07 22:53:21 +0000 | [diff] [blame] | 1820 | com_addoparg(c, CALL_FUNCTION, 0); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1821 | } |
| 1822 | else { |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 1823 | PyObject *keywords = NULL; |
Guido van Rossum | 635abd2 | 1997-01-06 22:56:52 +0000 | [diff] [blame] | 1824 | int i, na, nk; |
Guido van Rossum | ca90605 | 1998-12-10 16:56:22 +0000 | [diff] [blame] | 1825 | int lineno = n->n_lineno; |
Jeremy Hylton | 7690151 | 2000-03-28 23:49:17 +0000 | [diff] [blame] | 1826 | int star_flag = 0; |
| 1827 | int starstar_flag = 0; |
| 1828 | int opcode; |
Guido van Rossum | f10570b | 1995-07-07 22:53:21 +0000 | [diff] [blame] | 1829 | REQ(n, arglist); |
Guido van Rossum | f10570b | 1995-07-07 22:53:21 +0000 | [diff] [blame] | 1830 | na = 0; |
| 1831 | nk = 0; |
| 1832 | for (i = 0; i < NCH(n); i += 2) { |
Guido van Rossum | ca90605 | 1998-12-10 16:56:22 +0000 | [diff] [blame] | 1833 | node *ch = CHILD(n, i); |
Jeremy Hylton | 7690151 | 2000-03-28 23:49:17 +0000 | [diff] [blame] | 1834 | if (TYPE(ch) == STAR || |
| 1835 | TYPE(ch) == DOUBLESTAR) |
| 1836 | break; |
Guido van Rossum | ca90605 | 1998-12-10 16:56:22 +0000 | [diff] [blame] | 1837 | if (ch->n_lineno != lineno) { |
| 1838 | lineno = ch->n_lineno; |
Michael W. Hudson | dd32a91 | 2002-08-15 14:59:02 +0000 | [diff] [blame] | 1839 | com_set_lineno(c, lineno); |
Guido van Rossum | ca90605 | 1998-12-10 16:56:22 +0000 | [diff] [blame] | 1840 | } |
| 1841 | com_argument(c, ch, &keywords); |
Guido van Rossum | 635abd2 | 1997-01-06 22:56:52 +0000 | [diff] [blame] | 1842 | if (keywords == NULL) |
Guido van Rossum | f10570b | 1995-07-07 22:53:21 +0000 | [diff] [blame] | 1843 | na++; |
| 1844 | else |
| 1845 | nk++; |
| 1846 | } |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 1847 | Py_XDECREF(keywords); |
Jeremy Hylton | 7690151 | 2000-03-28 23:49:17 +0000 | [diff] [blame] | 1848 | while (i < NCH(n)) { |
| 1849 | node *tok = CHILD(n, i); |
| 1850 | node *ch = CHILD(n, i+1); |
| 1851 | i += 3; |
| 1852 | switch (TYPE(tok)) { |
| 1853 | case STAR: star_flag = 1; break; |
| 1854 | case DOUBLESTAR: starstar_flag = 1; break; |
| 1855 | } |
| 1856 | com_node(c, ch); |
| 1857 | } |
Guido van Rossum | f10570b | 1995-07-07 22:53:21 +0000 | [diff] [blame] | 1858 | if (na > 255 || nk > 255) { |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 1859 | com_error(c, PyExc_SyntaxError, |
| 1860 | "more than 255 arguments"); |
Guido van Rossum | f10570b | 1995-07-07 22:53:21 +0000 | [diff] [blame] | 1861 | } |
Jeremy Hylton | 7690151 | 2000-03-28 23:49:17 +0000 | [diff] [blame] | 1862 | if (star_flag || starstar_flag) |
Jeremy Hylton | e4fb958 | 2000-03-29 00:10:44 +0000 | [diff] [blame] | 1863 | opcode = CALL_FUNCTION_VAR - 1 + |
Jeremy Hylton | 7690151 | 2000-03-28 23:49:17 +0000 | [diff] [blame] | 1864 | star_flag + (starstar_flag << 1); |
| 1865 | else |
| 1866 | opcode = CALL_FUNCTION; |
| 1867 | com_addoparg(c, opcode, na | (nk << 8)); |
| 1868 | com_pop(c, na + 2*nk + star_flag + starstar_flag); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1869 | } |
| 1870 | } |
| 1871 | |
| 1872 | static void |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 1873 | com_select_member(struct compiling *c, node *n) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1874 | { |
| 1875 | com_addopname(c, LOAD_ATTR, n); |
| 1876 | } |
| 1877 | |
| 1878 | static void |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 1879 | com_sliceobj(struct compiling *c, node *n) |
Guido van Rossum | 8861b74 | 1996-07-30 16:49:37 +0000 | [diff] [blame] | 1880 | { |
| 1881 | int i=0; |
| 1882 | int ns=2; /* number of slice arguments */ |
Guido van Rossum | 8861b74 | 1996-07-30 16:49:37 +0000 | [diff] [blame] | 1883 | node *ch; |
| 1884 | |
| 1885 | /* first argument */ |
| 1886 | if (TYPE(CHILD(n,i)) == COLON) { |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 1887 | com_addoparg(c, LOAD_CONST, com_addconst(c, Py_None)); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 1888 | com_push(c, 1); |
Guido van Rossum | 8861b74 | 1996-07-30 16:49:37 +0000 | [diff] [blame] | 1889 | i++; |
| 1890 | } |
| 1891 | else { |
| 1892 | com_node(c, CHILD(n,i)); |
| 1893 | i++; |
| 1894 | REQ(CHILD(n,i),COLON); |
| 1895 | i++; |
| 1896 | } |
| 1897 | /* second argument */ |
| 1898 | if (i < NCH(n) && TYPE(CHILD(n,i)) == test) { |
| 1899 | com_node(c, CHILD(n,i)); |
| 1900 | i++; |
| 1901 | } |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 1902 | else { |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 1903 | com_addoparg(c, LOAD_CONST, com_addconst(c, Py_None)); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 1904 | com_push(c, 1); |
| 1905 | } |
Guido van Rossum | 8861b74 | 1996-07-30 16:49:37 +0000 | [diff] [blame] | 1906 | /* remaining arguments */ |
| 1907 | for (; i < NCH(n); i++) { |
| 1908 | ns++; |
| 1909 | ch=CHILD(n,i); |
| 1910 | REQ(ch, sliceop); |
| 1911 | if (NCH(ch) == 1) { |
| 1912 | /* right argument of ':' missing */ |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 1913 | com_addoparg(c, LOAD_CONST, com_addconst(c, Py_None)); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 1914 | com_push(c, 1); |
Guido van Rossum | 8861b74 | 1996-07-30 16:49:37 +0000 | [diff] [blame] | 1915 | } |
| 1916 | else |
| 1917 | com_node(c, CHILD(ch,1)); |
| 1918 | } |
| 1919 | com_addoparg(c, BUILD_SLICE, ns); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 1920 | com_pop(c, 1 + (ns == 3)); |
Guido van Rossum | 8861b74 | 1996-07-30 16:49:37 +0000 | [diff] [blame] | 1921 | } |
| 1922 | |
| 1923 | static void |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 1924 | com_subscript(struct compiling *c, node *n) |
Guido van Rossum | 8861b74 | 1996-07-30 16:49:37 +0000 | [diff] [blame] | 1925 | { |
| 1926 | node *ch; |
| 1927 | REQ(n, subscript); |
| 1928 | ch = CHILD(n,0); |
| 1929 | /* check for rubber index */ |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 1930 | if (TYPE(ch) == DOT && TYPE(CHILD(n,1)) == DOT) { |
Guido van Rossum | e449af7 | 1996-10-11 16:25:41 +0000 | [diff] [blame] | 1931 | com_addoparg(c, LOAD_CONST, com_addconst(c, Py_Ellipsis)); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 1932 | com_push(c, 1); |
| 1933 | } |
Guido van Rossum | 8861b74 | 1996-07-30 16:49:37 +0000 | [diff] [blame] | 1934 | else { |
| 1935 | /* check for slice */ |
| 1936 | if ((TYPE(ch) == COLON || NCH(n) > 1)) |
| 1937 | com_sliceobj(c, n); |
| 1938 | else { |
| 1939 | REQ(ch, test); |
| 1940 | com_node(c, ch); |
| 1941 | } |
| 1942 | } |
| 1943 | } |
| 1944 | |
| 1945 | static void |
Thomas Wouters | 434d082 | 2000-08-24 20:11:32 +0000 | [diff] [blame] | 1946 | com_subscriptlist(struct compiling *c, node *n, int assigning, node *augn) |
Guido van Rossum | 8861b74 | 1996-07-30 16:49:37 +0000 | [diff] [blame] | 1947 | { |
| 1948 | int i, op; |
| 1949 | REQ(n, subscriptlist); |
| 1950 | /* Check to make backward compatible slice behavior for '[i:j]' */ |
| 1951 | if (NCH(n) == 1) { |
| 1952 | node *sub = CHILD(n, 0); /* subscript */ |
Thomas Wouters | e8643c4 | 2000-08-05 21:37:50 +0000 | [diff] [blame] | 1953 | /* 'Basic' slice, should have exactly one colon. */ |
| 1954 | if ((TYPE(CHILD(sub, 0)) == COLON |
| 1955 | || (NCH(sub) > 1 && TYPE(CHILD(sub, 1)) == COLON)) |
| 1956 | && (TYPE(CHILD(sub,NCH(sub)-1)) != sliceop)) |
| 1957 | { |
Thomas Wouters | 434d082 | 2000-08-24 20:11:32 +0000 | [diff] [blame] | 1958 | switch (assigning) { |
| 1959 | case OP_DELETE: |
| 1960 | op = DELETE_SLICE; |
| 1961 | break; |
| 1962 | case OP_ASSIGN: |
| 1963 | op = STORE_SLICE; |
| 1964 | break; |
| 1965 | case OP_APPLY: |
Guido van Rossum | 8861b74 | 1996-07-30 16:49:37 +0000 | [diff] [blame] | 1966 | op = SLICE; |
Thomas Wouters | 434d082 | 2000-08-24 20:11:32 +0000 | [diff] [blame] | 1967 | break; |
| 1968 | default: |
| 1969 | com_augassign_slice(c, sub, assigning, augn); |
| 1970 | return; |
| 1971 | } |
Guido van Rossum | 8861b74 | 1996-07-30 16:49:37 +0000 | [diff] [blame] | 1972 | com_slice(c, sub, op); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 1973 | if (op == STORE_SLICE) |
| 1974 | com_pop(c, 2); |
| 1975 | else if (op == DELETE_SLICE) |
| 1976 | com_pop(c, 1); |
Guido van Rossum | 8861b74 | 1996-07-30 16:49:37 +0000 | [diff] [blame] | 1977 | return; |
| 1978 | } |
| 1979 | } |
| 1980 | /* Else normal subscriptlist. Compile each subscript. */ |
| 1981 | for (i = 0; i < NCH(n); i += 2) |
| 1982 | com_subscript(c, CHILD(n, i)); |
| 1983 | /* Put multiple subscripts into a tuple */ |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 1984 | if (NCH(n) > 1) { |
| 1985 | i = (NCH(n)+1) / 2; |
| 1986 | com_addoparg(c, BUILD_TUPLE, i); |
| 1987 | com_pop(c, i-1); |
| 1988 | } |
Thomas Wouters | 434d082 | 2000-08-24 20:11:32 +0000 | [diff] [blame] | 1989 | switch (assigning) { |
| 1990 | case OP_DELETE: |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 1991 | op = DELETE_SUBSCR; |
| 1992 | i = 2; |
Thomas Wouters | 434d082 | 2000-08-24 20:11:32 +0000 | [diff] [blame] | 1993 | break; |
| 1994 | default: |
| 1995 | case OP_ASSIGN: |
| 1996 | op = STORE_SUBSCR; |
| 1997 | i = 3; |
| 1998 | break; |
| 1999 | case OP_APPLY: |
| 2000 | op = BINARY_SUBSCR; |
| 2001 | i = 1; |
| 2002 | break; |
| 2003 | } |
| 2004 | if (assigning > OP_APPLY) { |
| 2005 | com_addoparg(c, DUP_TOPX, 2); |
| 2006 | com_push(c, 2); |
| 2007 | com_addbyte(c, BINARY_SUBSCR); |
| 2008 | com_pop(c, 1); |
| 2009 | com_node(c, augn); |
| 2010 | com_addbyte(c, assigning); |
| 2011 | com_pop(c, 1); |
| 2012 | com_addbyte(c, ROT_THREE); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 2013 | } |
Guido van Rossum | 8861b74 | 1996-07-30 16:49:37 +0000 | [diff] [blame] | 2014 | com_addbyte(c, op); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 2015 | com_pop(c, i); |
Guido van Rossum | 8861b74 | 1996-07-30 16:49:37 +0000 | [diff] [blame] | 2016 | } |
| 2017 | |
| 2018 | static void |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 2019 | com_apply_trailer(struct compiling *c, node *n) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2020 | { |
| 2021 | REQ(n, trailer); |
| 2022 | switch (TYPE(CHILD(n, 0))) { |
| 2023 | case LPAR: |
| 2024 | com_call_function(c, CHILD(n, 1)); |
| 2025 | break; |
| 2026 | case DOT: |
| 2027 | com_select_member(c, CHILD(n, 1)); |
| 2028 | break; |
| 2029 | case LSQB: |
Thomas Wouters | 434d082 | 2000-08-24 20:11:32 +0000 | [diff] [blame] | 2030 | com_subscriptlist(c, CHILD(n, 1), OP_APPLY, NULL); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2031 | break; |
| 2032 | default: |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 2033 | com_error(c, PyExc_SystemError, |
Guido van Rossum | 452a983 | 1996-09-17 14:32:04 +0000 | [diff] [blame] | 2034 | "com_apply_trailer: unknown trailer type"); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2035 | } |
| 2036 | } |
| 2037 | |
| 2038 | static void |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 2039 | com_power(struct compiling *c, node *n) |
Guido van Rossum | 50564e8 | 1996-01-12 01:13:16 +0000 | [diff] [blame] | 2040 | { |
| 2041 | int i; |
| 2042 | REQ(n, power); |
| 2043 | com_atom(c, CHILD(n, 0)); |
| 2044 | for (i = 1; i < NCH(n); i++) { |
| 2045 | if (TYPE(CHILD(n, i)) == DOUBLESTAR) { |
| 2046 | com_factor(c, CHILD(n, i+1)); |
| 2047 | com_addbyte(c, BINARY_POWER); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 2048 | com_pop(c, 1); |
Guido van Rossum | 50564e8 | 1996-01-12 01:13:16 +0000 | [diff] [blame] | 2049 | break; |
| 2050 | } |
| 2051 | else |
| 2052 | com_apply_trailer(c, CHILD(n, i)); |
| 2053 | } |
| 2054 | } |
| 2055 | |
| 2056 | static void |
Jeremy Hylton | d5e5a2a | 2001-08-12 01:54:38 +0000 | [diff] [blame] | 2057 | com_invert_constant(struct compiling *c, node *n) |
| 2058 | { |
| 2059 | /* Compute the inverse of int and longs and use them directly, |
| 2060 | but be prepared to generate code for all other |
| 2061 | possibilities (invalid numbers, floats, complex). |
| 2062 | */ |
| 2063 | PyObject *num, *inv = NULL; |
| 2064 | int i; |
| 2065 | |
| 2066 | REQ(n, NUMBER); |
| 2067 | num = parsenumber(c, STR(n)); |
| 2068 | if (num == NULL) |
| 2069 | i = 255; |
| 2070 | else { |
| 2071 | inv = PyNumber_Invert(num); |
| 2072 | if (inv == NULL) { |
| 2073 | PyErr_Clear(); |
| 2074 | i = com_addconst(c, num); |
| 2075 | } else { |
| 2076 | i = com_addconst(c, inv); |
| 2077 | Py_DECREF(inv); |
| 2078 | } |
| 2079 | Py_DECREF(num); |
| 2080 | } |
| 2081 | com_addoparg(c, LOAD_CONST, i); |
| 2082 | com_push(c, 1); |
| 2083 | if (num != NULL && inv == NULL) |
| 2084 | com_addbyte(c, UNARY_INVERT); |
| 2085 | } |
| 2086 | |
Tim Peters | 51e2651 | 2001-09-07 08:45:55 +0000 | [diff] [blame] | 2087 | static int |
| 2088 | is_float_zero(const char *p) |
| 2089 | { |
| 2090 | int found_radix_point = 0; |
| 2091 | int ch; |
| 2092 | while ((ch = Py_CHARMASK(*p++)) != '\0') { |
| 2093 | switch (ch) { |
| 2094 | case '0': |
| 2095 | /* no reason to believe it's not 0 -- continue */ |
| 2096 | break; |
| 2097 | |
| 2098 | case 'e': case 'E': case 'j': case 'J': |
| 2099 | /* If this was a hex constant, we already would have |
| 2100 | returned 0 due to the 'x' or 'X', so 'e' or 'E' |
| 2101 | must be an exponent marker, and we haven't yet |
| 2102 | seen a non-zero digit, and it doesn't matter what |
| 2103 | the exponent is then. For 'j' or 'J' similarly, |
| 2104 | except that this is an imaginary 0 then. */ |
| 2105 | return 1; |
| 2106 | |
| 2107 | case '.': |
| 2108 | found_radix_point = 1; |
| 2109 | break; |
| 2110 | |
| 2111 | default: |
| 2112 | return 0; |
| 2113 | } |
| 2114 | } |
| 2115 | return found_radix_point; |
| 2116 | } |
| 2117 | |
Jeremy Hylton | d5e5a2a | 2001-08-12 01:54:38 +0000 | [diff] [blame] | 2118 | static void |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 2119 | com_factor(struct compiling *c, node *n) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2120 | { |
Jeremy Hylton | d5e5a2a | 2001-08-12 01:54:38 +0000 | [diff] [blame] | 2121 | int childtype = TYPE(CHILD(n, 0)); |
Tim Peters | 51e2651 | 2001-09-07 08:45:55 +0000 | [diff] [blame] | 2122 | node *pfactor, *ppower, *patom, *pnum; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2123 | REQ(n, factor); |
Jeremy Hylton | d5e5a2a | 2001-08-12 01:54:38 +0000 | [diff] [blame] | 2124 | /* If the unary +, -, or ~ operator is applied to a constant, |
Tim Peters | 51e2651 | 2001-09-07 08:45:55 +0000 | [diff] [blame] | 2125 | don't generate a UNARY_xxx opcode. Just store the |
Jeremy Hylton | d5e5a2a | 2001-08-12 01:54:38 +0000 | [diff] [blame] | 2126 | approriate value as a constant. If the value is negative, |
| 2127 | extend the string containing the constant and insert a |
Tim Peters | 51e2651 | 2001-09-07 08:45:55 +0000 | [diff] [blame] | 2128 | negative in the 0th position -- unless we're doing unary minus |
| 2129 | of a floating zero! In that case the sign is significant, but |
| 2130 | the const dict can't distinguish +0.0 from -0.0. |
Jeremy Hylton | d5e5a2a | 2001-08-12 01:54:38 +0000 | [diff] [blame] | 2131 | */ |
| 2132 | if ((childtype == PLUS || childtype == MINUS || childtype == TILDE) |
Fred Drake | 14ef244 | 2001-08-30 18:53:25 +0000 | [diff] [blame] | 2133 | && NCH(n) == 2 |
Tim Peters | 51e2651 | 2001-09-07 08:45:55 +0000 | [diff] [blame] | 2134 | && TYPE((pfactor = CHILD(n, 1))) == factor |
| 2135 | && NCH(pfactor) == 1 |
| 2136 | && TYPE((ppower = CHILD(pfactor, 0))) == power |
| 2137 | && NCH(ppower) == 1 |
| 2138 | && TYPE((patom = CHILD(ppower, 0))) == atom |
| 2139 | && TYPE((pnum = CHILD(patom, 0))) == NUMBER |
Guido van Rossum | 66b1259 | 2003-02-12 16:57:47 +0000 | [diff] [blame] | 2140 | && !(childtype == MINUS && |
| 2141 | (STR(pnum)[0] == '0' || is_float_zero(STR(pnum))))) { |
Jeremy Hylton | d5e5a2a | 2001-08-12 01:54:38 +0000 | [diff] [blame] | 2142 | if (childtype == TILDE) { |
Tim Peters | 51e2651 | 2001-09-07 08:45:55 +0000 | [diff] [blame] | 2143 | com_invert_constant(c, pnum); |
Jeremy Hylton | d5e5a2a | 2001-08-12 01:54:38 +0000 | [diff] [blame] | 2144 | return; |
| 2145 | } |
| 2146 | if (childtype == MINUS) { |
Andrew MacIntyre | 80d4e2a | 2002-08-04 06:28:21 +0000 | [diff] [blame] | 2147 | char *s = PyObject_MALLOC(strlen(STR(pnum)) + 2); |
Jeremy Hylton | d5e5a2a | 2001-08-12 01:54:38 +0000 | [diff] [blame] | 2148 | if (s == NULL) { |
| 2149 | com_error(c, PyExc_MemoryError, ""); |
| 2150 | com_addbyte(c, 255); |
| 2151 | return; |
| 2152 | } |
| 2153 | s[0] = '-'; |
Tim Peters | 51e2651 | 2001-09-07 08:45:55 +0000 | [diff] [blame] | 2154 | strcpy(s + 1, STR(pnum)); |
Andrew MacIntyre | 80d4e2a | 2002-08-04 06:28:21 +0000 | [diff] [blame] | 2155 | PyObject_FREE(STR(pnum)); |
Tim Peters | 51e2651 | 2001-09-07 08:45:55 +0000 | [diff] [blame] | 2156 | STR(pnum) = s; |
Jeremy Hylton | d5e5a2a | 2001-08-12 01:54:38 +0000 | [diff] [blame] | 2157 | } |
Tim Peters | 51e2651 | 2001-09-07 08:45:55 +0000 | [diff] [blame] | 2158 | com_atom(c, patom); |
Jeremy Hylton | d5e5a2a | 2001-08-12 01:54:38 +0000 | [diff] [blame] | 2159 | } |
| 2160 | else if (childtype == PLUS) { |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2161 | com_factor(c, CHILD(n, 1)); |
| 2162 | com_addbyte(c, UNARY_POSITIVE); |
| 2163 | } |
Jeremy Hylton | d5e5a2a | 2001-08-12 01:54:38 +0000 | [diff] [blame] | 2164 | else if (childtype == MINUS) { |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2165 | com_factor(c, CHILD(n, 1)); |
| 2166 | com_addbyte(c, UNARY_NEGATIVE); |
| 2167 | } |
Jeremy Hylton | d5e5a2a | 2001-08-12 01:54:38 +0000 | [diff] [blame] | 2168 | else if (childtype == TILDE) { |
Guido van Rossum | 7928cd7 | 1991-10-24 14:59:31 +0000 | [diff] [blame] | 2169 | com_factor(c, CHILD(n, 1)); |
| 2170 | com_addbyte(c, UNARY_INVERT); |
| 2171 | } |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2172 | else { |
Guido van Rossum | 50564e8 | 1996-01-12 01:13:16 +0000 | [diff] [blame] | 2173 | com_power(c, CHILD(n, 0)); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2174 | } |
| 2175 | } |
| 2176 | |
| 2177 | static void |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 2178 | com_term(struct compiling *c, node *n) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2179 | { |
| 2180 | int i; |
| 2181 | int op; |
| 2182 | REQ(n, term); |
| 2183 | com_factor(c, CHILD(n, 0)); |
| 2184 | for (i = 2; i < NCH(n); i += 2) { |
| 2185 | com_factor(c, CHILD(n, i)); |
| 2186 | switch (TYPE(CHILD(n, i-1))) { |
| 2187 | case STAR: |
| 2188 | op = BINARY_MULTIPLY; |
| 2189 | break; |
| 2190 | case SLASH: |
Guido van Rossum | 4668b00 | 2001-08-08 05:00:18 +0000 | [diff] [blame] | 2191 | if (c->c_flags & CO_FUTURE_DIVISION) |
| 2192 | op = BINARY_TRUE_DIVIDE; |
| 2193 | else |
| 2194 | op = BINARY_DIVIDE; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2195 | break; |
| 2196 | case PERCENT: |
| 2197 | op = BINARY_MODULO; |
| 2198 | break; |
Guido van Rossum | 4668b00 | 2001-08-08 05:00:18 +0000 | [diff] [blame] | 2199 | case DOUBLESLASH: |
| 2200 | op = BINARY_FLOOR_DIVIDE; |
| 2201 | break; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2202 | default: |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 2203 | com_error(c, PyExc_SystemError, |
Guido van Rossum | 4668b00 | 2001-08-08 05:00:18 +0000 | [diff] [blame] | 2204 | "com_term: operator not *, /, // or %"); |
Guido van Rossum | 7928cd7 | 1991-10-24 14:59:31 +0000 | [diff] [blame] | 2205 | op = 255; |
| 2206 | } |
| 2207 | com_addbyte(c, op); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 2208 | com_pop(c, 1); |
Guido van Rossum | 7928cd7 | 1991-10-24 14:59:31 +0000 | [diff] [blame] | 2209 | } |
| 2210 | } |
| 2211 | |
| 2212 | static void |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 2213 | com_arith_expr(struct compiling *c, node *n) |
Guido van Rossum | 7928cd7 | 1991-10-24 14:59:31 +0000 | [diff] [blame] | 2214 | { |
| 2215 | int i; |
| 2216 | int op; |
| 2217 | REQ(n, arith_expr); |
| 2218 | com_term(c, CHILD(n, 0)); |
| 2219 | for (i = 2; i < NCH(n); i += 2) { |
| 2220 | com_term(c, CHILD(n, i)); |
| 2221 | switch (TYPE(CHILD(n, i-1))) { |
| 2222 | case PLUS: |
| 2223 | op = BINARY_ADD; |
| 2224 | break; |
| 2225 | case MINUS: |
| 2226 | op = BINARY_SUBTRACT; |
| 2227 | break; |
| 2228 | default: |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 2229 | com_error(c, PyExc_SystemError, |
Guido van Rossum | 452a983 | 1996-09-17 14:32:04 +0000 | [diff] [blame] | 2230 | "com_arith_expr: operator not + or -"); |
Guido van Rossum | 7928cd7 | 1991-10-24 14:59:31 +0000 | [diff] [blame] | 2231 | op = 255; |
| 2232 | } |
| 2233 | com_addbyte(c, op); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 2234 | com_pop(c, 1); |
Guido van Rossum | 7928cd7 | 1991-10-24 14:59:31 +0000 | [diff] [blame] | 2235 | } |
| 2236 | } |
| 2237 | |
| 2238 | static void |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 2239 | com_shift_expr(struct compiling *c, node *n) |
Guido van Rossum | 7928cd7 | 1991-10-24 14:59:31 +0000 | [diff] [blame] | 2240 | { |
| 2241 | int i; |
| 2242 | int op; |
| 2243 | REQ(n, shift_expr); |
| 2244 | com_arith_expr(c, CHILD(n, 0)); |
| 2245 | for (i = 2; i < NCH(n); i += 2) { |
| 2246 | com_arith_expr(c, CHILD(n, i)); |
| 2247 | switch (TYPE(CHILD(n, i-1))) { |
| 2248 | case LEFTSHIFT: |
| 2249 | op = BINARY_LSHIFT; |
| 2250 | break; |
| 2251 | case RIGHTSHIFT: |
| 2252 | op = BINARY_RSHIFT; |
| 2253 | break; |
| 2254 | default: |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 2255 | com_error(c, PyExc_SystemError, |
Guido van Rossum | 452a983 | 1996-09-17 14:32:04 +0000 | [diff] [blame] | 2256 | "com_shift_expr: operator not << or >>"); |
Guido van Rossum | 7928cd7 | 1991-10-24 14:59:31 +0000 | [diff] [blame] | 2257 | op = 255; |
| 2258 | } |
| 2259 | com_addbyte(c, op); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 2260 | com_pop(c, 1); |
Guido van Rossum | 7928cd7 | 1991-10-24 14:59:31 +0000 | [diff] [blame] | 2261 | } |
| 2262 | } |
| 2263 | |
| 2264 | static void |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 2265 | com_and_expr(struct compiling *c, node *n) |
Guido van Rossum | 7928cd7 | 1991-10-24 14:59:31 +0000 | [diff] [blame] | 2266 | { |
| 2267 | int i; |
| 2268 | int op; |
| 2269 | REQ(n, and_expr); |
| 2270 | com_shift_expr(c, CHILD(n, 0)); |
| 2271 | for (i = 2; i < NCH(n); i += 2) { |
| 2272 | com_shift_expr(c, CHILD(n, i)); |
| 2273 | if (TYPE(CHILD(n, i-1)) == AMPER) { |
| 2274 | op = BINARY_AND; |
| 2275 | } |
| 2276 | else { |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 2277 | com_error(c, PyExc_SystemError, |
Guido van Rossum | 452a983 | 1996-09-17 14:32:04 +0000 | [diff] [blame] | 2278 | "com_and_expr: operator not &"); |
Guido van Rossum | 7928cd7 | 1991-10-24 14:59:31 +0000 | [diff] [blame] | 2279 | op = 255; |
| 2280 | } |
| 2281 | com_addbyte(c, op); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 2282 | com_pop(c, 1); |
Guido van Rossum | 7928cd7 | 1991-10-24 14:59:31 +0000 | [diff] [blame] | 2283 | } |
| 2284 | } |
| 2285 | |
| 2286 | static void |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 2287 | com_xor_expr(struct compiling *c, node *n) |
Guido van Rossum | 7928cd7 | 1991-10-24 14:59:31 +0000 | [diff] [blame] | 2288 | { |
| 2289 | int i; |
| 2290 | int op; |
| 2291 | REQ(n, xor_expr); |
| 2292 | com_and_expr(c, CHILD(n, 0)); |
| 2293 | for (i = 2; i < NCH(n); i += 2) { |
| 2294 | com_and_expr(c, CHILD(n, i)); |
| 2295 | if (TYPE(CHILD(n, i-1)) == CIRCUMFLEX) { |
| 2296 | op = BINARY_XOR; |
| 2297 | } |
| 2298 | else { |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 2299 | com_error(c, PyExc_SystemError, |
Guido van Rossum | 452a983 | 1996-09-17 14:32:04 +0000 | [diff] [blame] | 2300 | "com_xor_expr: operator not ^"); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2301 | op = 255; |
| 2302 | } |
| 2303 | com_addbyte(c, op); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 2304 | com_pop(c, 1); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2305 | } |
| 2306 | } |
| 2307 | |
| 2308 | static void |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 2309 | com_expr(struct compiling *c, node *n) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2310 | { |
| 2311 | int i; |
| 2312 | int op; |
| 2313 | REQ(n, expr); |
Guido van Rossum | 7928cd7 | 1991-10-24 14:59:31 +0000 | [diff] [blame] | 2314 | com_xor_expr(c, CHILD(n, 0)); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2315 | for (i = 2; i < NCH(n); i += 2) { |
Guido van Rossum | 7928cd7 | 1991-10-24 14:59:31 +0000 | [diff] [blame] | 2316 | com_xor_expr(c, CHILD(n, i)); |
| 2317 | if (TYPE(CHILD(n, i-1)) == VBAR) { |
| 2318 | op = BINARY_OR; |
| 2319 | } |
| 2320 | else { |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 2321 | com_error(c, PyExc_SystemError, |
Guido van Rossum | 452a983 | 1996-09-17 14:32:04 +0000 | [diff] [blame] | 2322 | "com_expr: expr operator not |"); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2323 | op = 255; |
| 2324 | } |
| 2325 | com_addbyte(c, op); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 2326 | com_pop(c, 1); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2327 | } |
| 2328 | } |
| 2329 | |
| 2330 | static enum cmp_op |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 2331 | cmp_type(node *n) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2332 | { |
| 2333 | REQ(n, comp_op); |
Tim Peters | 12d55a7 | 2003-05-12 19:16:52 +0000 | [diff] [blame] | 2334 | /* comp_op: '<' | '>' | '>=' | '<=' | '<>' | '!=' | '==' |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2335 | | 'in' | 'not' 'in' | 'is' | 'is' not' */ |
| 2336 | if (NCH(n) == 1) { |
| 2337 | n = CHILD(n, 0); |
| 2338 | switch (TYPE(n)) { |
Martin v. Löwis | 7198a52 | 2002-01-01 19:59:11 +0000 | [diff] [blame] | 2339 | case LESS: return PyCmp_LT; |
| 2340 | case GREATER: return PyCmp_GT; |
Tim Peters | 12d55a7 | 2003-05-12 19:16:52 +0000 | [diff] [blame] | 2341 | case EQEQUAL: return PyCmp_EQ; |
Martin v. Löwis | 7198a52 | 2002-01-01 19:59:11 +0000 | [diff] [blame] | 2342 | case LESSEQUAL: return PyCmp_LE; |
| 2343 | case GREATEREQUAL: return PyCmp_GE; |
| 2344 | case NOTEQUAL: return PyCmp_NE; /* <> or != */ |
| 2345 | case NAME: if (strcmp(STR(n), "in") == 0) return PyCmp_IN; |
| 2346 | if (strcmp(STR(n), "is") == 0) return PyCmp_IS; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2347 | } |
| 2348 | } |
| 2349 | else if (NCH(n) == 2) { |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2350 | switch (TYPE(CHILD(n, 0))) { |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2351 | case NAME: if (strcmp(STR(CHILD(n, 1)), "in") == 0) |
Martin v. Löwis | 7198a52 | 2002-01-01 19:59:11 +0000 | [diff] [blame] | 2352 | return PyCmp_NOT_IN; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2353 | if (strcmp(STR(CHILD(n, 0)), "is") == 0) |
Martin v. Löwis | 7198a52 | 2002-01-01 19:59:11 +0000 | [diff] [blame] | 2354 | return PyCmp_IS_NOT; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2355 | } |
| 2356 | } |
Martin v. Löwis | 7198a52 | 2002-01-01 19:59:11 +0000 | [diff] [blame] | 2357 | return PyCmp_BAD; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2358 | } |
| 2359 | |
| 2360 | static void |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 2361 | com_comparison(struct compiling *c, node *n) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2362 | { |
| 2363 | int i; |
| 2364 | enum cmp_op op; |
| 2365 | int anchor; |
| 2366 | REQ(n, comparison); /* comparison: expr (comp_op expr)* */ |
| 2367 | com_expr(c, CHILD(n, 0)); |
| 2368 | if (NCH(n) == 1) |
| 2369 | return; |
| 2370 | |
| 2371 | /**************************************************************** |
| 2372 | The following code is generated for all but the last |
| 2373 | comparison in a chain: |
| 2374 | |
| 2375 | label: on stack: opcode: jump to: |
| 2376 | |
| 2377 | a <code to load b> |
| 2378 | a, b DUP_TOP |
| 2379 | a, b, b ROT_THREE |
| 2380 | b, a, b COMPARE_OP |
| 2381 | b, 0-or-1 JUMP_IF_FALSE L1 |
| 2382 | b, 1 POP_TOP |
| 2383 | b |
| 2384 | |
| 2385 | We are now ready to repeat this sequence for the next |
| 2386 | comparison in the chain. |
| 2387 | |
| 2388 | For the last we generate: |
| 2389 | |
| 2390 | b <code to load c> |
| 2391 | b, c COMPARE_OP |
| 2392 | 0-or-1 |
| 2393 | |
| 2394 | If there were any jumps to L1 (i.e., there was more than one |
| 2395 | comparison), we generate: |
| 2396 | |
| 2397 | 0-or-1 JUMP_FORWARD L2 |
| 2398 | L1: b, 0 ROT_TWO |
| 2399 | 0, b POP_TOP |
| 2400 | 0 |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 2401 | L2: 0-or-1 |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2402 | ****************************************************************/ |
| 2403 | |
| 2404 | anchor = 0; |
| 2405 | |
| 2406 | for (i = 2; i < NCH(n); i += 2) { |
| 2407 | com_expr(c, CHILD(n, i)); |
| 2408 | if (i+2 < NCH(n)) { |
| 2409 | com_addbyte(c, DUP_TOP); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 2410 | com_push(c, 1); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2411 | com_addbyte(c, ROT_THREE); |
| 2412 | } |
| 2413 | op = cmp_type(CHILD(n, i-1)); |
Martin v. Löwis | 7198a52 | 2002-01-01 19:59:11 +0000 | [diff] [blame] | 2414 | if (op == PyCmp_BAD) { |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 2415 | com_error(c, PyExc_SystemError, |
Guido van Rossum | 452a983 | 1996-09-17 14:32:04 +0000 | [diff] [blame] | 2416 | "com_comparison: unknown comparison op"); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2417 | } |
| 2418 | com_addoparg(c, COMPARE_OP, op); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 2419 | com_pop(c, 1); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2420 | if (i+2 < NCH(n)) { |
| 2421 | com_addfwref(c, JUMP_IF_FALSE, &anchor); |
| 2422 | com_addbyte(c, POP_TOP); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 2423 | com_pop(c, 1); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2424 | } |
| 2425 | } |
| 2426 | |
| 2427 | if (anchor) { |
| 2428 | int anchor2 = 0; |
| 2429 | com_addfwref(c, JUMP_FORWARD, &anchor2); |
| 2430 | com_backpatch(c, anchor); |
| 2431 | com_addbyte(c, ROT_TWO); |
| 2432 | com_addbyte(c, POP_TOP); |
| 2433 | com_backpatch(c, anchor2); |
| 2434 | } |
| 2435 | } |
| 2436 | |
| 2437 | static void |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 2438 | com_not_test(struct compiling *c, node *n) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2439 | { |
| 2440 | REQ(n, not_test); /* 'not' not_test | comparison */ |
| 2441 | if (NCH(n) == 1) { |
| 2442 | com_comparison(c, CHILD(n, 0)); |
| 2443 | } |
| 2444 | else { |
| 2445 | com_not_test(c, CHILD(n, 1)); |
| 2446 | com_addbyte(c, UNARY_NOT); |
| 2447 | } |
| 2448 | } |
| 2449 | |
| 2450 | static void |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 2451 | com_and_test(struct compiling *c, node *n) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2452 | { |
| 2453 | int i; |
| 2454 | int anchor; |
| 2455 | REQ(n, and_test); /* not_test ('and' not_test)* */ |
| 2456 | anchor = 0; |
| 2457 | i = 0; |
| 2458 | for (;;) { |
| 2459 | com_not_test(c, CHILD(n, i)); |
| 2460 | if ((i += 2) >= NCH(n)) |
| 2461 | break; |
| 2462 | com_addfwref(c, JUMP_IF_FALSE, &anchor); |
| 2463 | com_addbyte(c, POP_TOP); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 2464 | com_pop(c, 1); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2465 | } |
| 2466 | if (anchor) |
| 2467 | com_backpatch(c, anchor); |
| 2468 | } |
| 2469 | |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 2470 | static int |
| 2471 | com_make_closure(struct compiling *c, PyCodeObject *co) |
| 2472 | { |
Jeremy Hylton | 733c893 | 2001-12-13 19:51:56 +0000 | [diff] [blame] | 2473 | int i, free = PyCode_GetNumFree(co); |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 2474 | if (free == 0) |
| 2475 | return 0; |
| 2476 | for (i = 0; i < free; ++i) { |
| 2477 | /* Bypass com_addop_varname because it will generate |
| 2478 | LOAD_DEREF but LOAD_CLOSURE is needed. |
| 2479 | */ |
| 2480 | PyObject *name = PyTuple_GET_ITEM(co->co_freevars, i); |
| 2481 | int arg, reftype; |
| 2482 | |
| 2483 | /* Special case: If a class contains a method with a |
| 2484 | free variable that has the same name as a method, |
| 2485 | the name will be considered free *and* local in the |
| 2486 | class. It should be handled by the closure, as |
| 2487 | well as by the normal name loookup logic. |
| 2488 | */ |
| 2489 | reftype = get_ref_type(c, PyString_AS_STRING(name)); |
| 2490 | if (reftype == CELL) |
| 2491 | arg = com_lookup_arg(c->c_cellvars, name); |
| 2492 | else /* (reftype == FREE) */ |
| 2493 | arg = com_lookup_arg(c->c_freevars, name); |
| 2494 | if (arg == -1) { |
Jeremy Hylton | 7889107 | 2001-03-01 06:09:34 +0000 | [diff] [blame] | 2495 | fprintf(stderr, "lookup %s in %s %d %d\n" |
| 2496 | "freevars of %s: %s\n", |
| 2497 | PyObject_REPR(name), |
| 2498 | c->c_name, |
| 2499 | reftype, arg, |
| 2500 | PyString_AS_STRING(co->co_name), |
| 2501 | PyObject_REPR(co->co_freevars)); |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 2502 | Py_FatalError("com_make_closure()"); |
| 2503 | } |
| 2504 | com_addoparg(c, LOAD_CLOSURE, arg); |
| 2505 | |
| 2506 | } |
| 2507 | com_push(c, free); |
| 2508 | return 1; |
| 2509 | } |
| 2510 | |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2511 | static void |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 2512 | com_test(struct compiling *c, node *n) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2513 | { |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 2514 | REQ(n, test); /* and_test ('or' and_test)* | lambdef */ |
Guido van Rossum | 57531fe | 1993-11-30 14:57:42 +0000 | [diff] [blame] | 2515 | if (NCH(n) == 1 && TYPE(CHILD(n, 0)) == lambdef) { |
Jeremy Hylton | 93a569d | 2001-10-17 13:22:22 +0000 | [diff] [blame] | 2516 | PyCodeObject *co; |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 2517 | int i, closure; |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 2518 | int ndefs = com_argdefs(c, CHILD(n, 0)); |
Jeremy Hylton | 4b38da6 | 2001-02-02 18:19:15 +0000 | [diff] [blame] | 2519 | symtable_enter_scope(c->c_symtable, "lambda", lambdef, |
| 2520 | n->n_lineno); |
Jeremy Hylton | 93a569d | 2001-10-17 13:22:22 +0000 | [diff] [blame] | 2521 | co = icompile(CHILD(n, 0), c); |
Jeremy Hylton | cb17ae8 | 2001-02-09 22:22:18 +0000 | [diff] [blame] | 2522 | if (co == NULL) { |
| 2523 | c->c_errors++; |
| 2524 | return; |
| 2525 | } |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 2526 | symtable_exit_scope(c->c_symtable); |
Jeremy Hylton | 93a569d | 2001-10-17 13:22:22 +0000 | [diff] [blame] | 2527 | i = com_addconst(c, (PyObject *)co); |
| 2528 | closure = com_make_closure(c, co); |
Guido van Rossum | 57531fe | 1993-11-30 14:57:42 +0000 | [diff] [blame] | 2529 | com_addoparg(c, LOAD_CONST, i); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 2530 | com_push(c, 1); |
Jeremy Hylton | 93a569d | 2001-10-17 13:22:22 +0000 | [diff] [blame] | 2531 | if (closure) { |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 2532 | com_addoparg(c, MAKE_CLOSURE, ndefs); |
Jeremy Hylton | 733c893 | 2001-12-13 19:51:56 +0000 | [diff] [blame] | 2533 | com_pop(c, PyCode_GetNumFree(co)); |
Jeremy Hylton | 93a569d | 2001-10-17 13:22:22 +0000 | [diff] [blame] | 2534 | } else |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 2535 | com_addoparg(c, MAKE_FUNCTION, ndefs); |
Jeremy Hylton | 93a569d | 2001-10-17 13:22:22 +0000 | [diff] [blame] | 2536 | Py_DECREF(co); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 2537 | com_pop(c, ndefs); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2538 | } |
Guido van Rossum | 57531fe | 1993-11-30 14:57:42 +0000 | [diff] [blame] | 2539 | else { |
| 2540 | int anchor = 0; |
| 2541 | int i = 0; |
| 2542 | for (;;) { |
| 2543 | com_and_test(c, CHILD(n, i)); |
| 2544 | if ((i += 2) >= NCH(n)) |
| 2545 | break; |
| 2546 | com_addfwref(c, JUMP_IF_TRUE, &anchor); |
| 2547 | com_addbyte(c, POP_TOP); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 2548 | com_pop(c, 1); |
Guido van Rossum | 57531fe | 1993-11-30 14:57:42 +0000 | [diff] [blame] | 2549 | } |
| 2550 | if (anchor) |
| 2551 | com_backpatch(c, anchor); |
| 2552 | } |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2553 | } |
| 2554 | |
| 2555 | static void |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 2556 | com_list(struct compiling *c, node *n, int toplevel) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2557 | { |
| 2558 | /* exprlist: expr (',' expr)* [',']; likewise for testlist */ |
Guido van Rossum | 288a60f | 1991-12-16 13:05:10 +0000 | [diff] [blame] | 2559 | if (NCH(n) == 1 && !toplevel) { |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2560 | com_node(c, CHILD(n, 0)); |
| 2561 | } |
| 2562 | else { |
| 2563 | int i; |
| 2564 | int len; |
| 2565 | len = (NCH(n) + 1) / 2; |
| 2566 | for (i = 0; i < NCH(n); i += 2) |
| 2567 | com_node(c, CHILD(n, i)); |
| 2568 | com_addoparg(c, BUILD_TUPLE, len); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 2569 | com_pop(c, len-1); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2570 | } |
| 2571 | } |
| 2572 | |
| 2573 | |
| 2574 | /* Begin of assignment compilation */ |
| 2575 | |
Thomas Wouters | 434d082 | 2000-08-24 20:11:32 +0000 | [diff] [blame] | 2576 | |
| 2577 | static void |
| 2578 | com_augassign_attr(struct compiling *c, node *n, int opcode, node *augn) |
| 2579 | { |
| 2580 | com_addbyte(c, DUP_TOP); |
| 2581 | com_push(c, 1); |
| 2582 | com_addopname(c, LOAD_ATTR, n); |
Thomas Wouters | 434d082 | 2000-08-24 20:11:32 +0000 | [diff] [blame] | 2583 | com_node(c, augn); |
| 2584 | com_addbyte(c, opcode); |
| 2585 | com_pop(c, 1); |
| 2586 | com_addbyte(c, ROT_TWO); |
| 2587 | com_addopname(c, STORE_ATTR, n); |
| 2588 | com_pop(c, 2); |
| 2589 | } |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2590 | |
| 2591 | static void |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 2592 | com_assign_attr(struct compiling *c, node *n, int assigning) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2593 | { |
Guido van Rossum | 3ac99d4 | 2002-08-16 02:13:49 +0000 | [diff] [blame] | 2594 | if (none_assignment_check(c, STR(n), assigning)) |
| 2595 | return; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2596 | com_addopname(c, assigning ? STORE_ATTR : DELETE_ATTR, n); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 2597 | com_pop(c, assigning ? 2 : 1); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2598 | } |
| 2599 | |
| 2600 | static void |
Thomas Wouters | 434d082 | 2000-08-24 20:11:32 +0000 | [diff] [blame] | 2601 | com_assign_trailer(struct compiling *c, node *n, int assigning, node *augn) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2602 | { |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2603 | REQ(n, trailer); |
| 2604 | switch (TYPE(CHILD(n, 0))) { |
| 2605 | case LPAR: /* '(' [exprlist] ')' */ |
Jeremy Hylton | 05ab2e6 | 2002-05-31 14:08:29 +0000 | [diff] [blame] | 2606 | if (assigning == OP_DELETE) |
| 2607 | com_error(c, PyExc_SyntaxError, |
| 2608 | "can't delete function call"); |
| 2609 | else |
| 2610 | com_error(c, PyExc_SyntaxError, |
| 2611 | "can't assign to function call"); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2612 | break; |
| 2613 | case DOT: /* '.' NAME */ |
Thomas Wouters | 434d082 | 2000-08-24 20:11:32 +0000 | [diff] [blame] | 2614 | if (assigning > OP_APPLY) |
| 2615 | com_augassign_attr(c, CHILD(n, 1), assigning, augn); |
| 2616 | else |
| 2617 | com_assign_attr(c, CHILD(n, 1), assigning); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2618 | break; |
Guido van Rossum | 8861b74 | 1996-07-30 16:49:37 +0000 | [diff] [blame] | 2619 | case LSQB: /* '[' subscriptlist ']' */ |
Thomas Wouters | 434d082 | 2000-08-24 20:11:32 +0000 | [diff] [blame] | 2620 | com_subscriptlist(c, CHILD(n, 1), assigning, augn); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2621 | break; |
| 2622 | default: |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 2623 | com_error(c, PyExc_SystemError, "unknown trailer type"); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2624 | } |
| 2625 | } |
| 2626 | |
| 2627 | static void |
Thomas Wouters | 0be5aab | 2000-08-11 22:15:52 +0000 | [diff] [blame] | 2628 | com_assign_sequence(struct compiling *c, node *n, int assigning) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2629 | { |
| 2630 | int i; |
Thomas Wouters | b59290f | 2000-08-25 05:41:11 +0000 | [diff] [blame] | 2631 | if (TYPE(n) != testlist && TYPE(n) != listmaker) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2632 | REQ(n, exprlist); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 2633 | if (assigning) { |
| 2634 | i = (NCH(n)+1)/2; |
Thomas Wouters | 0be5aab | 2000-08-11 22:15:52 +0000 | [diff] [blame] | 2635 | com_addoparg(c, UNPACK_SEQUENCE, i); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 2636 | com_push(c, i-1); |
| 2637 | } |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2638 | for (i = 0; i < NCH(n); i += 2) |
Thomas Wouters | 434d082 | 2000-08-24 20:11:32 +0000 | [diff] [blame] | 2639 | com_assign(c, CHILD(n, i), assigning, NULL); |
| 2640 | } |
| 2641 | |
| 2642 | static void |
| 2643 | com_augassign_name(struct compiling *c, node *n, int opcode, node *augn) |
| 2644 | { |
| 2645 | REQ(n, NAME); |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 2646 | com_addop_varname(c, VAR_LOAD, STR(n)); |
Thomas Wouters | 434d082 | 2000-08-24 20:11:32 +0000 | [diff] [blame] | 2647 | com_push(c, 1); |
| 2648 | com_node(c, augn); |
| 2649 | com_addbyte(c, opcode); |
| 2650 | com_pop(c, 1); |
| 2651 | com_assign_name(c, n, OP_ASSIGN); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2652 | } |
| 2653 | |
| 2654 | static void |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 2655 | com_assign_name(struct compiling *c, node *n, int assigning) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2656 | { |
| 2657 | REQ(n, NAME); |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 2658 | com_addop_varname(c, assigning ? VAR_STORE : VAR_DELETE, STR(n)); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 2659 | if (assigning) |
| 2660 | com_pop(c, 1); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2661 | } |
| 2662 | |
| 2663 | static void |
Thomas Wouters | 434d082 | 2000-08-24 20:11:32 +0000 | [diff] [blame] | 2664 | com_assign(struct compiling *c, node *n, int assigning, node *augn) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2665 | { |
| 2666 | /* Loop to avoid trivial recursion */ |
| 2667 | for (;;) { |
| 2668 | switch (TYPE(n)) { |
Guido van Rossum | d6f3bc2 | 1990-11-18 17:35:03 +0000 | [diff] [blame] | 2669 | |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2670 | case exprlist: |
| 2671 | case testlist: |
Guido van Rossum | 2d3b986 | 2002-05-24 15:47:06 +0000 | [diff] [blame] | 2672 | case testlist1: |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2673 | if (NCH(n) > 1) { |
Thomas Wouters | 434d082 | 2000-08-24 20:11:32 +0000 | [diff] [blame] | 2674 | if (assigning > OP_APPLY) { |
| 2675 | com_error(c, PyExc_SyntaxError, |
Jeremy Hylton | 29906ee | 2001-02-27 04:23:34 +0000 | [diff] [blame] | 2676 | "augmented assign to tuple not possible"); |
Thomas Wouters | 434d082 | 2000-08-24 20:11:32 +0000 | [diff] [blame] | 2677 | return; |
| 2678 | } |
Thomas Wouters | 0be5aab | 2000-08-11 22:15:52 +0000 | [diff] [blame] | 2679 | com_assign_sequence(c, n, assigning); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2680 | return; |
| 2681 | } |
| 2682 | n = CHILD(n, 0); |
| 2683 | break; |
Guido van Rossum | d6f3bc2 | 1990-11-18 17:35:03 +0000 | [diff] [blame] | 2684 | |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2685 | case test: |
| 2686 | case and_test: |
| 2687 | case not_test: |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2688 | case comparison: |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2689 | case expr: |
Guido van Rossum | 7928cd7 | 1991-10-24 14:59:31 +0000 | [diff] [blame] | 2690 | case xor_expr: |
| 2691 | case and_expr: |
| 2692 | case shift_expr: |
| 2693 | case arith_expr: |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2694 | case term: |
Guido van Rossum | 50564e8 | 1996-01-12 01:13:16 +0000 | [diff] [blame] | 2695 | case factor: |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2696 | if (NCH(n) > 1) { |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 2697 | com_error(c, PyExc_SyntaxError, |
Guido van Rossum | 452a983 | 1996-09-17 14:32:04 +0000 | [diff] [blame] | 2698 | "can't assign to operator"); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2699 | return; |
| 2700 | } |
| 2701 | n = CHILD(n, 0); |
| 2702 | break; |
Guido van Rossum | d6f3bc2 | 1990-11-18 17:35:03 +0000 | [diff] [blame] | 2703 | |
Jeremy Hylton | cb17ae8 | 2001-02-09 22:22:18 +0000 | [diff] [blame] | 2704 | case power: /* atom trailer* ('**' power)* |
| 2705 | ('+'|'-'|'~') factor | atom trailer* */ |
Guido van Rossum | 50564e8 | 1996-01-12 01:13:16 +0000 | [diff] [blame] | 2706 | if (TYPE(CHILD(n, 0)) != atom) { |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 2707 | com_error(c, PyExc_SyntaxError, |
Guido van Rossum | 452a983 | 1996-09-17 14:32:04 +0000 | [diff] [blame] | 2708 | "can't assign to operator"); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2709 | return; |
| 2710 | } |
Guido van Rossum | 50564e8 | 1996-01-12 01:13:16 +0000 | [diff] [blame] | 2711 | if (NCH(n) > 1) { /* trailer or exponent present */ |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2712 | int i; |
| 2713 | com_node(c, CHILD(n, 0)); |
| 2714 | for (i = 1; i+1 < NCH(n); i++) { |
Guido van Rossum | 50564e8 | 1996-01-12 01:13:16 +0000 | [diff] [blame] | 2715 | if (TYPE(CHILD(n, i)) == DOUBLESTAR) { |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 2716 | com_error(c, PyExc_SyntaxError, |
Guido van Rossum | 452a983 | 1996-09-17 14:32:04 +0000 | [diff] [blame] | 2717 | "can't assign to operator"); |
Guido van Rossum | 50564e8 | 1996-01-12 01:13:16 +0000 | [diff] [blame] | 2718 | return; |
| 2719 | } |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2720 | com_apply_trailer(c, CHILD(n, i)); |
| 2721 | } /* NB i is still alive */ |
| 2722 | com_assign_trailer(c, |
Thomas Wouters | 434d082 | 2000-08-24 20:11:32 +0000 | [diff] [blame] | 2723 | CHILD(n, i), assigning, augn); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2724 | return; |
| 2725 | } |
| 2726 | n = CHILD(n, 0); |
| 2727 | break; |
Guido van Rossum | d6f3bc2 | 1990-11-18 17:35:03 +0000 | [diff] [blame] | 2728 | |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2729 | case atom: |
| 2730 | switch (TYPE(CHILD(n, 0))) { |
| 2731 | case LPAR: |
| 2732 | n = CHILD(n, 1); |
| 2733 | if (TYPE(n) == RPAR) { |
| 2734 | /* XXX Should allow () = () ??? */ |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 2735 | com_error(c, PyExc_SyntaxError, |
Guido van Rossum | 452a983 | 1996-09-17 14:32:04 +0000 | [diff] [blame] | 2736 | "can't assign to ()"); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2737 | return; |
| 2738 | } |
Thomas Wouters | 434d082 | 2000-08-24 20:11:32 +0000 | [diff] [blame] | 2739 | if (assigning > OP_APPLY) { |
| 2740 | com_error(c, PyExc_SyntaxError, |
Neal Norwitz | a1d654e | 2003-05-22 22:00:04 +0000 | [diff] [blame] | 2741 | "augmented assign to tuple literal not possible"); |
Thomas Wouters | 434d082 | 2000-08-24 20:11:32 +0000 | [diff] [blame] | 2742 | return; |
| 2743 | } |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2744 | break; |
| 2745 | case LSQB: |
| 2746 | n = CHILD(n, 1); |
| 2747 | if (TYPE(n) == RSQB) { |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 2748 | com_error(c, PyExc_SyntaxError, |
Guido van Rossum | 452a983 | 1996-09-17 14:32:04 +0000 | [diff] [blame] | 2749 | "can't assign to []"); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2750 | return; |
| 2751 | } |
Thomas Wouters | 434d082 | 2000-08-24 20:11:32 +0000 | [diff] [blame] | 2752 | if (assigning > OP_APPLY) { |
| 2753 | com_error(c, PyExc_SyntaxError, |
Neal Norwitz | a1d654e | 2003-05-22 22:00:04 +0000 | [diff] [blame] | 2754 | "augmented assign to list literal not possible"); |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 2755 | return; |
| 2756 | } |
| 2757 | if (NCH(n) > 1 |
| 2758 | && TYPE(CHILD(n, 1)) == list_for) { |
| 2759 | com_error(c, PyExc_SyntaxError, |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 2760 | "can't assign to list comprehension"); |
Thomas Wouters | 434d082 | 2000-08-24 20:11:32 +0000 | [diff] [blame] | 2761 | return; |
| 2762 | } |
Thomas Wouters | 0be5aab | 2000-08-11 22:15:52 +0000 | [diff] [blame] | 2763 | com_assign_sequence(c, n, assigning); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2764 | return; |
| 2765 | case NAME: |
Thomas Wouters | 434d082 | 2000-08-24 20:11:32 +0000 | [diff] [blame] | 2766 | if (assigning > OP_APPLY) |
| 2767 | com_augassign_name(c, CHILD(n, 0), |
| 2768 | assigning, augn); |
| 2769 | else |
| 2770 | com_assign_name(c, CHILD(n, 0), |
| 2771 | assigning); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2772 | return; |
| 2773 | default: |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 2774 | com_error(c, PyExc_SyntaxError, |
Guido van Rossum | 452a983 | 1996-09-17 14:32:04 +0000 | [diff] [blame] | 2775 | "can't assign to literal"); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2776 | return; |
| 2777 | } |
| 2778 | break; |
Guido van Rossum | 15cc9a0 | 1996-08-08 18:51:04 +0000 | [diff] [blame] | 2779 | |
| 2780 | case lambdef: |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 2781 | com_error(c, PyExc_SyntaxError, |
| 2782 | "can't assign to lambda"); |
Guido van Rossum | 15cc9a0 | 1996-08-08 18:51:04 +0000 | [diff] [blame] | 2783 | return; |
Guido van Rossum | d6f3bc2 | 1990-11-18 17:35:03 +0000 | [diff] [blame] | 2784 | |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2785 | default: |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 2786 | com_error(c, PyExc_SystemError, |
| 2787 | "com_assign: bad node"); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2788 | return; |
Guido van Rossum | d6f3bc2 | 1990-11-18 17:35:03 +0000 | [diff] [blame] | 2789 | |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2790 | } |
| 2791 | } |
| 2792 | } |
Guido van Rossum | 7c53111 | 1997-03-11 18:42:21 +0000 | [diff] [blame] | 2793 | |
Thomas Wouters | 434d082 | 2000-08-24 20:11:32 +0000 | [diff] [blame] | 2794 | static void |
| 2795 | com_augassign(struct compiling *c, node *n) |
| 2796 | { |
| 2797 | int opcode; |
| 2798 | |
| 2799 | switch (STR(CHILD(CHILD(n, 1), 0))[0]) { |
| 2800 | case '+': opcode = INPLACE_ADD; break; |
| 2801 | case '-': opcode = INPLACE_SUBTRACT; break; |
Guido van Rossum | 4668b00 | 2001-08-08 05:00:18 +0000 | [diff] [blame] | 2802 | case '/': |
| 2803 | if (STR(CHILD(CHILD(n, 1), 0))[1] == '/') |
| 2804 | opcode = INPLACE_FLOOR_DIVIDE; |
| 2805 | else if (c->c_flags & CO_FUTURE_DIVISION) |
| 2806 | opcode = INPLACE_TRUE_DIVIDE; |
| 2807 | else |
| 2808 | opcode = INPLACE_DIVIDE; |
| 2809 | break; |
Thomas Wouters | 434d082 | 2000-08-24 20:11:32 +0000 | [diff] [blame] | 2810 | case '%': opcode = INPLACE_MODULO; break; |
| 2811 | case '<': opcode = INPLACE_LSHIFT; break; |
| 2812 | case '>': opcode = INPLACE_RSHIFT; break; |
| 2813 | case '&': opcode = INPLACE_AND; break; |
| 2814 | case '^': opcode = INPLACE_XOR; break; |
| 2815 | case '|': opcode = INPLACE_OR; break; |
| 2816 | case '*': |
| 2817 | if (STR(CHILD(CHILD(n, 1), 0))[1] == '*') |
| 2818 | opcode = INPLACE_POWER; |
| 2819 | else |
| 2820 | opcode = INPLACE_MULTIPLY; |
| 2821 | break; |
| 2822 | default: |
| 2823 | com_error(c, PyExc_SystemError, "com_augassign: bad operator"); |
| 2824 | return; |
| 2825 | } |
| 2826 | com_assign(c, CHILD(n, 0), opcode, CHILD(n, 2)); |
| 2827 | } |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2828 | |
| 2829 | static void |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 2830 | com_expr_stmt(struct compiling *c, node *n) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2831 | { |
Thomas Wouters | 434d082 | 2000-08-24 20:11:32 +0000 | [diff] [blame] | 2832 | REQ(n, expr_stmt); |
| 2833 | /* testlist (('=' testlist)* | augassign testlist) */ |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 2834 | /* Forget it if we have just a doc string here */ |
Guido van Rossum | 5f5e817 | 1997-04-06 03:41:40 +0000 | [diff] [blame] | 2835 | if (!c->c_interactive && NCH(n) == 1 && get_rawdocstring(n) != NULL) |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 2836 | return; |
Thomas Wouters | 434d082 | 2000-08-24 20:11:32 +0000 | [diff] [blame] | 2837 | if (NCH(n) == 1) { |
| 2838 | com_node(c, CHILD(n, NCH(n)-1)); |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 2839 | if (c->c_interactive) |
| 2840 | com_addbyte(c, PRINT_EXPR); |
| 2841 | else |
| 2842 | com_addbyte(c, POP_TOP); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 2843 | com_pop(c, 1); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2844 | } |
Thomas Wouters | 434d082 | 2000-08-24 20:11:32 +0000 | [diff] [blame] | 2845 | else if (TYPE(CHILD(n,1)) == augassign) |
| 2846 | com_augassign(c, n); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2847 | else { |
| 2848 | int i; |
Thomas Wouters | 434d082 | 2000-08-24 20:11:32 +0000 | [diff] [blame] | 2849 | com_node(c, CHILD(n, NCH(n)-1)); |
Guido van Rossum | 4bad92c | 1991-07-27 21:34:52 +0000 | [diff] [blame] | 2850 | for (i = 0; i < NCH(n)-2; i+=2) { |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 2851 | if (i+2 < NCH(n)-2) { |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2852 | com_addbyte(c, DUP_TOP); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 2853 | com_push(c, 1); |
| 2854 | } |
Thomas Wouters | 434d082 | 2000-08-24 20:11:32 +0000 | [diff] [blame] | 2855 | com_assign(c, CHILD(n, i), OP_ASSIGN, NULL); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2856 | } |
| 2857 | } |
| 2858 | } |
| 2859 | |
| 2860 | static void |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 2861 | com_assert_stmt(struct compiling *c, node *n) |
Guido van Rossum | 228d7f3 | 1997-04-02 05:24:36 +0000 | [diff] [blame] | 2862 | { |
Neil Schemenauer | 89e3ee0 | 2002-04-26 01:58:53 +0000 | [diff] [blame] | 2863 | int a = 0; |
Guido van Rossum | 228d7f3 | 1997-04-02 05:24:36 +0000 | [diff] [blame] | 2864 | int i; |
| 2865 | REQ(n, assert_stmt); /* 'assert' test [',' test] */ |
Neil Schemenauer | 89e3ee0 | 2002-04-26 01:58:53 +0000 | [diff] [blame] | 2866 | if (Py_OptimizeFlag) |
| 2867 | return; |
| 2868 | /* Generate code like |
Guido van Rossum | 228d7f3 | 1997-04-02 05:24:36 +0000 | [diff] [blame] | 2869 | |
Neil Schemenauer | 89e3ee0 | 2002-04-26 01:58:53 +0000 | [diff] [blame] | 2870 | if not <test>: |
Guido van Rossum | 228d7f3 | 1997-04-02 05:24:36 +0000 | [diff] [blame] | 2871 | raise AssertionError [, <message>] |
| 2872 | |
| 2873 | where <message> is the second test, if present. |
| 2874 | */ |
Guido van Rossum | 228d7f3 | 1997-04-02 05:24:36 +0000 | [diff] [blame] | 2875 | com_node(c, CHILD(n, 1)); |
Neil Schemenauer | 89e3ee0 | 2002-04-26 01:58:53 +0000 | [diff] [blame] | 2876 | com_addfwref(c, JUMP_IF_TRUE, &a); |
Guido van Rossum | 228d7f3 | 1997-04-02 05:24:36 +0000 | [diff] [blame] | 2877 | com_addbyte(c, POP_TOP); |
| 2878 | com_pop(c, 1); |
| 2879 | /* Raise that exception! */ |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 2880 | com_addop_name(c, LOAD_GLOBAL, "AssertionError"); |
Guido van Rossum | 228d7f3 | 1997-04-02 05:24:36 +0000 | [diff] [blame] | 2881 | com_push(c, 1); |
| 2882 | i = NCH(n)/2; /* Either 2 or 4 */ |
| 2883 | if (i > 1) |
| 2884 | com_node(c, CHILD(n, 3)); |
| 2885 | com_addoparg(c, RAISE_VARARGS, i); |
| 2886 | com_pop(c, i); |
| 2887 | /* The interpreter does not fall through */ |
Neil Schemenauer | 89e3ee0 | 2002-04-26 01:58:53 +0000 | [diff] [blame] | 2888 | /* Jump ends up here */ |
Guido van Rossum | 228d7f3 | 1997-04-02 05:24:36 +0000 | [diff] [blame] | 2889 | com_backpatch(c, a); |
Guido van Rossum | 228d7f3 | 1997-04-02 05:24:36 +0000 | [diff] [blame] | 2890 | com_addbyte(c, POP_TOP); |
| 2891 | } |
| 2892 | |
| 2893 | static void |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 2894 | com_print_stmt(struct compiling *c, node *n) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2895 | { |
Barry Warsaw | 29c574e | 2000-08-21 15:38:56 +0000 | [diff] [blame] | 2896 | int i = 1; |
| 2897 | node* stream = NULL; |
| 2898 | |
Guido van Rossum | 4bad92c | 1991-07-27 21:34:52 +0000 | [diff] [blame] | 2899 | REQ(n, print_stmt); /* 'print' (test ',')* [test] */ |
Barry Warsaw | 29c574e | 2000-08-21 15:38:56 +0000 | [diff] [blame] | 2900 | |
| 2901 | /* are we using the extended print form? */ |
| 2902 | if (NCH(n) >= 2 && TYPE(CHILD(n, 1)) == RIGHTSHIFT) { |
| 2903 | stream = CHILD(n, 2); |
Barry Warsaw | 24703a0 | 2000-08-21 17:07:20 +0000 | [diff] [blame] | 2904 | com_node(c, stream); |
| 2905 | /* stack: [...] => [... stream] */ |
| 2906 | com_push(c, 1); |
Barry Warsaw | 29c574e | 2000-08-21 15:38:56 +0000 | [diff] [blame] | 2907 | if (NCH(n) > 3 && TYPE(CHILD(n, 3)) == COMMA) |
| 2908 | i = 4; |
| 2909 | else |
| 2910 | i = 3; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2911 | } |
Barry Warsaw | 29c574e | 2000-08-21 15:38:56 +0000 | [diff] [blame] | 2912 | for (; i < NCH(n); i += 2) { |
| 2913 | if (stream != NULL) { |
Barry Warsaw | 24703a0 | 2000-08-21 17:07:20 +0000 | [diff] [blame] | 2914 | com_addbyte(c, DUP_TOP); |
| 2915 | /* stack: [stream] => [stream stream] */ |
| 2916 | com_push(c, 1); |
Barry Warsaw | 29c574e | 2000-08-21 15:38:56 +0000 | [diff] [blame] | 2917 | com_node(c, CHILD(n, i)); |
Barry Warsaw | 24703a0 | 2000-08-21 17:07:20 +0000 | [diff] [blame] | 2918 | /* stack: [stream stream] => [stream stream obj] */ |
| 2919 | com_addbyte(c, ROT_TWO); |
| 2920 | /* stack: [stream stream obj] => [stream obj stream] */ |
Barry Warsaw | 29c574e | 2000-08-21 15:38:56 +0000 | [diff] [blame] | 2921 | com_addbyte(c, PRINT_ITEM_TO); |
Barry Warsaw | 24703a0 | 2000-08-21 17:07:20 +0000 | [diff] [blame] | 2922 | /* stack: [stream obj stream] => [stream] */ |
Barry Warsaw | 29c574e | 2000-08-21 15:38:56 +0000 | [diff] [blame] | 2923 | com_pop(c, 2); |
| 2924 | } |
| 2925 | else { |
Barry Warsaw | 29c574e | 2000-08-21 15:38:56 +0000 | [diff] [blame] | 2926 | com_node(c, CHILD(n, i)); |
Barry Warsaw | 24703a0 | 2000-08-21 17:07:20 +0000 | [diff] [blame] | 2927 | /* stack: [...] => [... obj] */ |
Barry Warsaw | 29c574e | 2000-08-21 15:38:56 +0000 | [diff] [blame] | 2928 | com_addbyte(c, PRINT_ITEM); |
| 2929 | com_pop(c, 1); |
| 2930 | } |
| 2931 | } |
| 2932 | /* XXX Alternatively, LOAD_CONST '\n' and then PRINT_ITEM */ |
Barry Warsaw | 24703a0 | 2000-08-21 17:07:20 +0000 | [diff] [blame] | 2933 | if (TYPE(CHILD(n, NCH(n)-1)) == COMMA) { |
Barry Warsaw | 29c574e | 2000-08-21 15:38:56 +0000 | [diff] [blame] | 2934 | if (stream != NULL) { |
Barry Warsaw | 24703a0 | 2000-08-21 17:07:20 +0000 | [diff] [blame] | 2935 | /* must pop the extra stream object off the stack */ |
| 2936 | com_addbyte(c, POP_TOP); |
| 2937 | /* stack: [... stream] => [...] */ |
| 2938 | com_pop(c, 1); |
| 2939 | } |
| 2940 | } |
| 2941 | else { |
| 2942 | if (stream != NULL) { |
| 2943 | /* this consumes the last stream object on stack */ |
Barry Warsaw | 29c574e | 2000-08-21 15:38:56 +0000 | [diff] [blame] | 2944 | com_addbyte(c, PRINT_NEWLINE_TO); |
Barry Warsaw | 24703a0 | 2000-08-21 17:07:20 +0000 | [diff] [blame] | 2945 | /* stack: [... stream] => [...] */ |
Barry Warsaw | 29c574e | 2000-08-21 15:38:56 +0000 | [diff] [blame] | 2946 | com_pop(c, 1); |
| 2947 | } |
| 2948 | else |
| 2949 | com_addbyte(c, PRINT_NEWLINE); |
| 2950 | } |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2951 | } |
| 2952 | |
| 2953 | static void |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 2954 | com_return_stmt(struct compiling *c, node *n) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2955 | { |
Guido van Rossum | 4bad92c | 1991-07-27 21:34:52 +0000 | [diff] [blame] | 2956 | REQ(n, return_stmt); /* 'return' [testlist] */ |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 2957 | if (!c->c_infunction) { |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 2958 | com_error(c, PyExc_SyntaxError, "'return' outside function"); |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 2959 | } |
Tim Peters | 5ca576e | 2001-06-18 22:08:13 +0000 | [diff] [blame] | 2960 | if (c->c_flags & CO_GENERATOR) { |
| 2961 | if (NCH(n) > 1) { |
| 2962 | com_error(c, PyExc_SyntaxError, |
| 2963 | "'return' with argument inside generator"); |
| 2964 | } |
Tim Peters | ad1a18b | 2001-06-23 06:19:16 +0000 | [diff] [blame] | 2965 | } |
| 2966 | if (NCH(n) < 2) { |
| 2967 | com_addoparg(c, LOAD_CONST, com_addconst(c, Py_None)); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 2968 | com_push(c, 1); |
| 2969 | } |
Tim Peters | ad1a18b | 2001-06-23 06:19:16 +0000 | [diff] [blame] | 2970 | else |
| 2971 | com_node(c, CHILD(n, 1)); |
| 2972 | com_addbyte(c, RETURN_VALUE); |
Tim Peters | 5ca576e | 2001-06-18 22:08:13 +0000 | [diff] [blame] | 2973 | com_pop(c, 1); |
| 2974 | } |
| 2975 | |
| 2976 | static void |
| 2977 | com_yield_stmt(struct compiling *c, node *n) |
| 2978 | { |
Tim Peters | 95c80f8 | 2001-06-23 02:07:08 +0000 | [diff] [blame] | 2979 | int i; |
Tim Peters | 5ca576e | 2001-06-18 22:08:13 +0000 | [diff] [blame] | 2980 | REQ(n, yield_stmt); /* 'yield' testlist */ |
| 2981 | if (!c->c_infunction) { |
| 2982 | com_error(c, PyExc_SyntaxError, "'yield' outside function"); |
| 2983 | } |
Tim Peters | 95c80f8 | 2001-06-23 02:07:08 +0000 | [diff] [blame] | 2984 | |
| 2985 | for (i = 0; i < c->c_nblocks; ++i) { |
| 2986 | if (c->c_block[i] == SETUP_FINALLY) { |
| 2987 | com_error(c, PyExc_SyntaxError, |
| 2988 | "'yield' not allowed in a 'try' block " |
| 2989 | "with a 'finally' clause"); |
| 2990 | return; |
| 2991 | } |
| 2992 | } |
Tim Peters | 5ca576e | 2001-06-18 22:08:13 +0000 | [diff] [blame] | 2993 | com_node(c, CHILD(n, 1)); |
| 2994 | com_addbyte(c, YIELD_VALUE); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 2995 | com_pop(c, 1); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 2996 | } |
| 2997 | |
| 2998 | static void |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 2999 | com_raise_stmt(struct compiling *c, node *n) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 3000 | { |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 3001 | int i; |
Guido van Rossum | d295f12 | 1998-04-09 21:39:57 +0000 | [diff] [blame] | 3002 | REQ(n, raise_stmt); /* 'raise' [test [',' test [',' test]]] */ |
| 3003 | if (NCH(n) > 1) { |
| 3004 | com_node(c, CHILD(n, 1)); |
| 3005 | if (NCH(n) > 3) { |
| 3006 | com_node(c, CHILD(n, 3)); |
| 3007 | if (NCH(n) > 5) |
| 3008 | com_node(c, CHILD(n, 5)); |
| 3009 | } |
Guido van Rossum | f10570b | 1995-07-07 22:53:21 +0000 | [diff] [blame] | 3010 | } |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 3011 | i = NCH(n)/2; |
| 3012 | com_addoparg(c, RAISE_VARARGS, i); |
| 3013 | com_pop(c, i); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 3014 | } |
| 3015 | |
| 3016 | static void |
Thomas Wouters | 5215225 | 2000-08-17 22:55:00 +0000 | [diff] [blame] | 3017 | com_from_import(struct compiling *c, node *n) |
| 3018 | { |
| 3019 | com_addopname(c, IMPORT_FROM, CHILD(n, 0)); |
| 3020 | com_push(c, 1); |
| 3021 | if (NCH(n) > 1) { |
| 3022 | if (strcmp(STR(CHILD(n, 1)), "as") != 0) { |
| 3023 | com_error(c, PyExc_SyntaxError, "invalid syntax"); |
| 3024 | return; |
| 3025 | } |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 3026 | com_addop_varname(c, VAR_STORE, STR(CHILD(n, 2))); |
Thomas Wouters | 5215225 | 2000-08-17 22:55:00 +0000 | [diff] [blame] | 3027 | } else |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 3028 | com_addop_varname(c, VAR_STORE, STR(CHILD(n, 0))); |
Thomas Wouters | 5215225 | 2000-08-17 22:55:00 +0000 | [diff] [blame] | 3029 | com_pop(c, 1); |
| 3030 | } |
| 3031 | |
| 3032 | static void |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 3033 | com_import_stmt(struct compiling *c, node *n) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 3034 | { |
| 3035 | int i; |
| 3036 | REQ(n, import_stmt); |
Guido van Rossum | 1f4fa50 | 1995-01-07 12:41:23 +0000 | [diff] [blame] | 3037 | /* 'import' dotted_name (',' dotted_name)* | |
| 3038 | 'from' dotted_name 'import' ('*' | NAME (',' NAME)*) */ |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 3039 | if (STR(CHILD(n, 0))[0] == 'f') { |
Guido van Rossum | 83fb073 | 2000-11-27 22:22:36 +0000 | [diff] [blame] | 3040 | PyObject *tup; |
Guido van Rossum | 1f4fa50 | 1995-01-07 12:41:23 +0000 | [diff] [blame] | 3041 | /* 'from' dotted_name 'import' ... */ |
| 3042 | REQ(CHILD(n, 1), dotted_name); |
Thomas Wouters | dd13e4f | 2000-08-27 20:31:27 +0000 | [diff] [blame] | 3043 | |
| 3044 | if (TYPE(CHILD(n, 3)) == STAR) { |
| 3045 | tup = Py_BuildValue("(s)", "*"); |
| 3046 | } else { |
| 3047 | tup = PyTuple_New((NCH(n) - 2)/2); |
| 3048 | for (i = 3; i < NCH(n); i += 2) { |
| 3049 | PyTuple_SET_ITEM(tup, (i-3)/2, |
Guido van Rossum | 633d90c | 2002-12-23 16:51:42 +0000 | [diff] [blame] | 3050 | PyString_FromString(STR( |
| 3051 | CHILD(CHILD(n, i), 0)))); |
Thomas Wouters | dd13e4f | 2000-08-27 20:31:27 +0000 | [diff] [blame] | 3052 | } |
| 3053 | } |
| 3054 | com_addoparg(c, LOAD_CONST, com_addconst(c, tup)); |
Guido van Rossum | 83fb073 | 2000-11-27 22:22:36 +0000 | [diff] [blame] | 3055 | Py_DECREF(tup); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 3056 | com_push(c, 1); |
Thomas Wouters | dd13e4f | 2000-08-27 20:31:27 +0000 | [diff] [blame] | 3057 | com_addopname(c, IMPORT_NAME, CHILD(n, 1)); |
Thomas Wouters | 5215225 | 2000-08-17 22:55:00 +0000 | [diff] [blame] | 3058 | if (TYPE(CHILD(n, 3)) == STAR) |
| 3059 | com_addbyte(c, IMPORT_STAR); |
| 3060 | else { |
| 3061 | for (i = 3; i < NCH(n); i += 2) |
| 3062 | com_from_import(c, CHILD(n, i)); |
| 3063 | com_addbyte(c, POP_TOP); |
| 3064 | } |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 3065 | com_pop(c, 1); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 3066 | } |
| 3067 | else { |
Guido van Rossum | d6f3bc2 | 1990-11-18 17:35:03 +0000 | [diff] [blame] | 3068 | /* 'import' ... */ |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 3069 | for (i = 1; i < NCH(n); i += 2) { |
Thomas Wouters | 5215225 | 2000-08-17 22:55:00 +0000 | [diff] [blame] | 3070 | node *subn = CHILD(n, i); |
| 3071 | REQ(subn, dotted_as_name); |
Thomas Wouters | dd13e4f | 2000-08-27 20:31:27 +0000 | [diff] [blame] | 3072 | com_addoparg(c, LOAD_CONST, com_addconst(c, Py_None)); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 3073 | com_push(c, 1); |
Thomas Wouters | dd13e4f | 2000-08-27 20:31:27 +0000 | [diff] [blame] | 3074 | com_addopname(c, IMPORT_NAME, CHILD(subn, 0)); |
Thomas Wouters | 5215225 | 2000-08-17 22:55:00 +0000 | [diff] [blame] | 3075 | if (NCH(subn) > 1) { |
Thomas Wouters | e753ef8 | 2000-08-27 20:16:32 +0000 | [diff] [blame] | 3076 | int j; |
| 3077 | if (strcmp(STR(CHILD(subn, 1)), "as") != 0) { |
Thomas Wouters | 5215225 | 2000-08-17 22:55:00 +0000 | [diff] [blame] | 3078 | com_error(c, PyExc_SyntaxError, |
| 3079 | "invalid syntax"); |
| 3080 | return; |
| 3081 | } |
Thomas Wouters | e753ef8 | 2000-08-27 20:16:32 +0000 | [diff] [blame] | 3082 | for (j=2 ; j < NCH(CHILD(subn, 0)); j += 2) |
| 3083 | com_addopname(c, LOAD_ATTR, |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 3084 | CHILD(CHILD(subn, 0), |
| 3085 | j)); |
| 3086 | com_addop_varname(c, VAR_STORE, |
| 3087 | STR(CHILD(subn, 2))); |
Thomas Wouters | 5215225 | 2000-08-17 22:55:00 +0000 | [diff] [blame] | 3088 | } else |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 3089 | com_addop_varname(c, VAR_STORE, |
| 3090 | STR(CHILD(CHILD(subn, 0), |
| 3091 | 0))); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 3092 | com_pop(c, 1); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 3093 | } |
| 3094 | } |
| 3095 | } |
| 3096 | |
| 3097 | static void |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 3098 | com_exec_stmt(struct compiling *c, node *n) |
Guido van Rossum | db3165e | 1993-10-18 17:06:59 +0000 | [diff] [blame] | 3099 | { |
| 3100 | REQ(n, exec_stmt); |
| 3101 | /* exec_stmt: 'exec' expr ['in' expr [',' expr]] */ |
| 3102 | com_node(c, CHILD(n, 1)); |
| 3103 | if (NCH(n) >= 4) |
| 3104 | com_node(c, CHILD(n, 3)); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 3105 | else { |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 3106 | com_addoparg(c, LOAD_CONST, com_addconst(c, Py_None)); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 3107 | com_push(c, 1); |
| 3108 | } |
Guido van Rossum | db3165e | 1993-10-18 17:06:59 +0000 | [diff] [blame] | 3109 | if (NCH(n) >= 6) |
| 3110 | com_node(c, CHILD(n, 5)); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 3111 | else { |
Guido van Rossum | db3165e | 1993-10-18 17:06:59 +0000 | [diff] [blame] | 3112 | com_addbyte(c, DUP_TOP); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 3113 | com_push(c, 1); |
| 3114 | } |
Guido van Rossum | db3165e | 1993-10-18 17:06:59 +0000 | [diff] [blame] | 3115 | com_addbyte(c, EXEC_STMT); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 3116 | com_pop(c, 3); |
Guido van Rossum | db3165e | 1993-10-18 17:06:59 +0000 | [diff] [blame] | 3117 | } |
| 3118 | |
Guido van Rossum | 7c53111 | 1997-03-11 18:42:21 +0000 | [diff] [blame] | 3119 | static int |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 3120 | is_constant_false(struct compiling *c, node *n) |
Guido van Rossum | 7c53111 | 1997-03-11 18:42:21 +0000 | [diff] [blame] | 3121 | { |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 3122 | PyObject *v; |
Guido van Rossum | 7c53111 | 1997-03-11 18:42:21 +0000 | [diff] [blame] | 3123 | int i; |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 3124 | /* argument c will be NULL when called from symtable_node() */ |
Guido van Rossum | 7c53111 | 1997-03-11 18:42:21 +0000 | [diff] [blame] | 3125 | |
| 3126 | /* Label to avoid tail recursion */ |
| 3127 | next: |
| 3128 | switch (TYPE(n)) { |
| 3129 | |
| 3130 | case suite: |
| 3131 | if (NCH(n) == 1) { |
| 3132 | n = CHILD(n, 0); |
| 3133 | goto next; |
| 3134 | } |
| 3135 | /* Fall through */ |
| 3136 | case file_input: |
| 3137 | for (i = 0; i < NCH(n); i++) { |
| 3138 | node *ch = CHILD(n, i); |
| 3139 | if (TYPE(ch) == stmt) { |
| 3140 | n = ch; |
| 3141 | goto next; |
| 3142 | } |
| 3143 | } |
| 3144 | break; |
| 3145 | |
| 3146 | case stmt: |
| 3147 | case simple_stmt: |
| 3148 | case small_stmt: |
| 3149 | n = CHILD(n, 0); |
| 3150 | goto next; |
| 3151 | |
| 3152 | case expr_stmt: |
| 3153 | case testlist: |
Guido van Rossum | 2d3b986 | 2002-05-24 15:47:06 +0000 | [diff] [blame] | 3154 | case testlist1: |
Guido van Rossum | 7c53111 | 1997-03-11 18:42:21 +0000 | [diff] [blame] | 3155 | case test: |
| 3156 | case and_test: |
| 3157 | case not_test: |
| 3158 | case comparison: |
| 3159 | case expr: |
| 3160 | case xor_expr: |
| 3161 | case and_expr: |
| 3162 | case shift_expr: |
| 3163 | case arith_expr: |
| 3164 | case term: |
| 3165 | case factor: |
| 3166 | case power: |
| 3167 | case atom: |
| 3168 | if (NCH(n) == 1) { |
| 3169 | n = CHILD(n, 0); |
| 3170 | goto next; |
| 3171 | } |
| 3172 | break; |
| 3173 | |
| 3174 | case NAME: |
| 3175 | if (Py_OptimizeFlag && strcmp(STR(n), "__debug__") == 0) |
| 3176 | return 1; |
| 3177 | break; |
| 3178 | |
| 3179 | case NUMBER: |
| 3180 | v = parsenumber(c, STR(n)); |
| 3181 | if (v == NULL) { |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 3182 | PyErr_Clear(); |
Guido van Rossum | 7c53111 | 1997-03-11 18:42:21 +0000 | [diff] [blame] | 3183 | break; |
| 3184 | } |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 3185 | i = PyObject_IsTrue(v); |
| 3186 | Py_DECREF(v); |
Guido van Rossum | 7c53111 | 1997-03-11 18:42:21 +0000 | [diff] [blame] | 3187 | return i == 0; |
| 3188 | |
| 3189 | case STRING: |
Martin v. Löwis | 339d0f7 | 2001-08-17 18:39:25 +0000 | [diff] [blame] | 3190 | v = parsestr(c, STR(n)); |
Guido van Rossum | 7c53111 | 1997-03-11 18:42:21 +0000 | [diff] [blame] | 3191 | if (v == NULL) { |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 3192 | PyErr_Clear(); |
Guido van Rossum | 7c53111 | 1997-03-11 18:42:21 +0000 | [diff] [blame] | 3193 | break; |
| 3194 | } |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 3195 | i = PyObject_IsTrue(v); |
| 3196 | Py_DECREF(v); |
Guido van Rossum | 7c53111 | 1997-03-11 18:42:21 +0000 | [diff] [blame] | 3197 | return i == 0; |
| 3198 | |
| 3199 | } |
| 3200 | return 0; |
| 3201 | } |
| 3202 | |
Tim Peters | 08a898f | 2001-06-28 01:52:22 +0000 | [diff] [blame] | 3203 | |
| 3204 | /* Look under n for a return stmt with an expression. |
| 3205 | * This hack is used to find illegal returns under "if 0:" blocks in |
| 3206 | * functions already known to be generators (as determined by the symtable |
| 3207 | * pass). |
| 3208 | * Return the offending return node if found, else NULL. |
| 3209 | */ |
| 3210 | static node * |
| 3211 | look_for_offending_return(node *n) |
| 3212 | { |
| 3213 | int i; |
| 3214 | |
| 3215 | for (i = 0; i < NCH(n); ++i) { |
| 3216 | node *kid = CHILD(n, i); |
| 3217 | |
| 3218 | switch (TYPE(kid)) { |
| 3219 | case classdef: |
| 3220 | case funcdef: |
| 3221 | case lambdef: |
| 3222 | /* Stuff in nested functions & classes doesn't |
| 3223 | affect the code block we started in. */ |
| 3224 | return NULL; |
| 3225 | |
| 3226 | case return_stmt: |
| 3227 | if (NCH(kid) > 1) |
| 3228 | return kid; |
| 3229 | break; |
| 3230 | |
| 3231 | default: { |
| 3232 | node *bad = look_for_offending_return(kid); |
| 3233 | if (bad != NULL) |
| 3234 | return bad; |
| 3235 | } |
| 3236 | } |
| 3237 | } |
| 3238 | |
| 3239 | return NULL; |
| 3240 | } |
| 3241 | |
Guido van Rossum | db3165e | 1993-10-18 17:06:59 +0000 | [diff] [blame] | 3242 | static void |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 3243 | com_if_stmt(struct compiling *c, node *n) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 3244 | { |
| 3245 | int i; |
| 3246 | int anchor = 0; |
| 3247 | REQ(n, if_stmt); |
| 3248 | /*'if' test ':' suite ('elif' test ':' suite)* ['else' ':' suite] */ |
| 3249 | for (i = 0; i+3 < NCH(n); i+=4) { |
| 3250 | int a = 0; |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 3251 | node *ch = CHILD(n, i+1); |
Tim Peters | 08a898f | 2001-06-28 01:52:22 +0000 | [diff] [blame] | 3252 | if (is_constant_false(c, ch)) { |
| 3253 | /* We're going to skip this block. However, if this |
| 3254 | is a generator, we have to check the dead code |
| 3255 | anyway to make sure there aren't any return stmts |
| 3256 | with expressions, in the same scope. */ |
| 3257 | if (c->c_flags & CO_GENERATOR) { |
| 3258 | node *p = look_for_offending_return(n); |
| 3259 | if (p != NULL) { |
| 3260 | int savelineno = c->c_lineno; |
| 3261 | c->c_lineno = p->n_lineno; |
| 3262 | com_error(c, PyExc_SyntaxError, |
| 3263 | "'return' with argument " |
| 3264 | "inside generator"); |
| 3265 | c->c_lineno = savelineno; |
| 3266 | } |
| 3267 | } |
Guido van Rossum | 7c53111 | 1997-03-11 18:42:21 +0000 | [diff] [blame] | 3268 | continue; |
Tim Peters | 08a898f | 2001-06-28 01:52:22 +0000 | [diff] [blame] | 3269 | } |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 3270 | if (i > 0) |
Michael W. Hudson | dd32a91 | 2002-08-15 14:59:02 +0000 | [diff] [blame] | 3271 | com_set_lineno(c, ch->n_lineno); |
Guido van Rossum | 7c53111 | 1997-03-11 18:42:21 +0000 | [diff] [blame] | 3272 | com_node(c, ch); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 3273 | com_addfwref(c, JUMP_IF_FALSE, &a); |
| 3274 | com_addbyte(c, POP_TOP); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 3275 | com_pop(c, 1); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 3276 | com_node(c, CHILD(n, i+3)); |
| 3277 | com_addfwref(c, JUMP_FORWARD, &anchor); |
| 3278 | com_backpatch(c, a); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 3279 | /* We jump here with an extra entry which we now pop */ |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 3280 | com_addbyte(c, POP_TOP); |
| 3281 | } |
| 3282 | if (i+2 < NCH(n)) |
| 3283 | com_node(c, CHILD(n, i+2)); |
Guido van Rossum | 7c53111 | 1997-03-11 18:42:21 +0000 | [diff] [blame] | 3284 | if (anchor) |
| 3285 | com_backpatch(c, anchor); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 3286 | } |
| 3287 | |
| 3288 | static void |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 3289 | com_while_stmt(struct compiling *c, node *n) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 3290 | { |
| 3291 | int break_anchor = 0; |
| 3292 | int anchor = 0; |
Guido van Rossum | 4bad92c | 1991-07-27 21:34:52 +0000 | [diff] [blame] | 3293 | int save_begin = c->c_begin; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 3294 | REQ(n, while_stmt); /* 'while' test ':' suite ['else' ':' suite] */ |
| 3295 | com_addfwref(c, SETUP_LOOP, &break_anchor); |
Guido van Rossum | 4bad92c | 1991-07-27 21:34:52 +0000 | [diff] [blame] | 3296 | block_push(c, SETUP_LOOP); |
| 3297 | c->c_begin = c->c_nexti; |
Michael W. Hudson | dd32a91 | 2002-08-15 14:59:02 +0000 | [diff] [blame] | 3298 | com_set_lineno(c, n->n_lineno); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 3299 | com_node(c, CHILD(n, 1)); |
| 3300 | com_addfwref(c, JUMP_IF_FALSE, &anchor); |
| 3301 | com_addbyte(c, POP_TOP); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 3302 | com_pop(c, 1); |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 3303 | c->c_loops++; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 3304 | com_node(c, CHILD(n, 3)); |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 3305 | c->c_loops--; |
Guido van Rossum | 4bad92c | 1991-07-27 21:34:52 +0000 | [diff] [blame] | 3306 | com_addoparg(c, JUMP_ABSOLUTE, c->c_begin); |
| 3307 | c->c_begin = save_begin; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 3308 | com_backpatch(c, anchor); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 3309 | /* We jump here with one entry more on the stack */ |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 3310 | com_addbyte(c, POP_TOP); |
| 3311 | com_addbyte(c, POP_BLOCK); |
Guido van Rossum | 4bad92c | 1991-07-27 21:34:52 +0000 | [diff] [blame] | 3312 | block_pop(c, SETUP_LOOP); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 3313 | if (NCH(n) > 4) |
| 3314 | com_node(c, CHILD(n, 6)); |
| 3315 | com_backpatch(c, break_anchor); |
| 3316 | } |
| 3317 | |
| 3318 | static void |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 3319 | com_for_stmt(struct compiling *c, node *n) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 3320 | { |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 3321 | int break_anchor = 0; |
| 3322 | int anchor = 0; |
Guido van Rossum | 4bad92c | 1991-07-27 21:34:52 +0000 | [diff] [blame] | 3323 | int save_begin = c->c_begin; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 3324 | REQ(n, for_stmt); |
| 3325 | /* 'for' exprlist 'in' exprlist ':' suite ['else' ':' suite] */ |
| 3326 | com_addfwref(c, SETUP_LOOP, &break_anchor); |
Guido van Rossum | 4bad92c | 1991-07-27 21:34:52 +0000 | [diff] [blame] | 3327 | block_push(c, SETUP_LOOP); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 3328 | com_node(c, CHILD(n, 3)); |
Guido van Rossum | 59d1d2b | 2001-04-20 19:13:02 +0000 | [diff] [blame] | 3329 | com_addbyte(c, GET_ITER); |
Guido van Rossum | 4bad92c | 1991-07-27 21:34:52 +0000 | [diff] [blame] | 3330 | c->c_begin = c->c_nexti; |
Michael W. Hudson | 26848a3 | 2003-04-29 17:07:36 +0000 | [diff] [blame] | 3331 | com_set_lineno(c, c->c_last_line); |
Guido van Rossum | 59d1d2b | 2001-04-20 19:13:02 +0000 | [diff] [blame] | 3332 | com_addfwref(c, FOR_ITER, &anchor); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 3333 | com_push(c, 1); |
Thomas Wouters | 434d082 | 2000-08-24 20:11:32 +0000 | [diff] [blame] | 3334 | com_assign(c, CHILD(n, 1), OP_ASSIGN, NULL); |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 3335 | c->c_loops++; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 3336 | com_node(c, CHILD(n, 5)); |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 3337 | c->c_loops--; |
Guido van Rossum | 4bad92c | 1991-07-27 21:34:52 +0000 | [diff] [blame] | 3338 | com_addoparg(c, JUMP_ABSOLUTE, c->c_begin); |
| 3339 | c->c_begin = save_begin; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 3340 | com_backpatch(c, anchor); |
Guido van Rossum | 59d1d2b | 2001-04-20 19:13:02 +0000 | [diff] [blame] | 3341 | com_pop(c, 1); /* FOR_ITER has popped this */ |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 3342 | com_addbyte(c, POP_BLOCK); |
Guido van Rossum | 4bad92c | 1991-07-27 21:34:52 +0000 | [diff] [blame] | 3343 | block_pop(c, SETUP_LOOP); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 3344 | if (NCH(n) > 8) |
| 3345 | com_node(c, CHILD(n, 8)); |
| 3346 | com_backpatch(c, break_anchor); |
| 3347 | } |
| 3348 | |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 3349 | /* Code generated for "try: S finally: Sf" is as follows: |
Guido van Rossum | d6f3bc2 | 1990-11-18 17:35:03 +0000 | [diff] [blame] | 3350 | |
| 3351 | SETUP_FINALLY L |
| 3352 | <code for S> |
| 3353 | POP_BLOCK |
| 3354 | LOAD_CONST <nil> |
Guido van Rossum | d6f3bc2 | 1990-11-18 17:35:03 +0000 | [diff] [blame] | 3355 | L: <code for Sf> |
| 3356 | END_FINALLY |
| 3357 | |
| 3358 | The special instructions use the block stack. Each block |
| 3359 | stack entry contains the instruction that created it (here |
| 3360 | SETUP_FINALLY), the level of the value stack at the time the |
| 3361 | block stack entry was created, and a label (here L). |
| 3362 | |
| 3363 | SETUP_FINALLY: |
| 3364 | Pushes the current value stack level and the label |
| 3365 | onto the block stack. |
| 3366 | POP_BLOCK: |
| 3367 | Pops en entry from the block stack, and pops the value |
| 3368 | stack until its level is the same as indicated on the |
| 3369 | block stack. (The label is ignored.) |
| 3370 | END_FINALLY: |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 3371 | Pops a variable number of entries from the *value* stack |
| 3372 | and re-raises the exception they specify. The number of |
| 3373 | entries popped depends on the (pseudo) exception type. |
Guido van Rossum | d6f3bc2 | 1990-11-18 17:35:03 +0000 | [diff] [blame] | 3374 | |
| 3375 | The block stack is unwound when an exception is raised: |
| 3376 | when a SETUP_FINALLY entry is found, the exception is pushed |
| 3377 | onto the value stack (and the exception condition is cleared), |
| 3378 | and the interpreter jumps to the label gotten from the block |
| 3379 | stack. |
| 3380 | |
| 3381 | Code generated for "try: S except E1, V1: S1 except E2, V2: S2 ...": |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 3382 | (The contents of the value stack is shown in [], with the top |
| 3383 | at the right; 'tb' is trace-back info, 'val' the exception's |
| 3384 | associated value, and 'exc' the exception.) |
Guido van Rossum | d6f3bc2 | 1990-11-18 17:35:03 +0000 | [diff] [blame] | 3385 | |
| 3386 | Value stack Label Instruction Argument |
| 3387 | [] SETUP_EXCEPT L1 |
| 3388 | [] <code for S> |
| 3389 | [] POP_BLOCK |
| 3390 | [] JUMP_FORWARD L0 |
| 3391 | |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 3392 | [tb, val, exc] L1: DUP ) |
| 3393 | [tb, val, exc, exc] <evaluate E1> ) |
| 3394 | [tb, val, exc, exc, E1] COMPARE_OP EXC_MATCH ) only if E1 |
| 3395 | [tb, val, exc, 1-or-0] JUMP_IF_FALSE L2 ) |
| 3396 | [tb, val, exc, 1] POP ) |
| 3397 | [tb, val, exc] POP |
| 3398 | [tb, val] <assign to V1> (or POP if no V1) |
| 3399 | [tb] POP |
Guido van Rossum | d6f3bc2 | 1990-11-18 17:35:03 +0000 | [diff] [blame] | 3400 | [] <code for S1> |
| 3401 | JUMP_FORWARD L0 |
| 3402 | |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 3403 | [tb, val, exc, 0] L2: POP |
| 3404 | [tb, val, exc] DUP |
Guido van Rossum | d6f3bc2 | 1990-11-18 17:35:03 +0000 | [diff] [blame] | 3405 | .............................etc....................... |
| 3406 | |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 3407 | [tb, val, exc, 0] Ln+1: POP |
| 3408 | [tb, val, exc] END_FINALLY # re-raise exception |
Guido van Rossum | d6f3bc2 | 1990-11-18 17:35:03 +0000 | [diff] [blame] | 3409 | |
| 3410 | [] L0: <next statement> |
| 3411 | |
| 3412 | Of course, parts are not generated if Vi or Ei is not present. |
| 3413 | */ |
| 3414 | |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 3415 | static void |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 3416 | com_try_except(struct compiling *c, node *n) |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 3417 | { |
| 3418 | int except_anchor = 0; |
| 3419 | int end_anchor = 0; |
| 3420 | int else_anchor = 0; |
| 3421 | int i; |
| 3422 | node *ch; |
| 3423 | |
| 3424 | com_addfwref(c, SETUP_EXCEPT, &except_anchor); |
| 3425 | block_push(c, SETUP_EXCEPT); |
| 3426 | com_node(c, CHILD(n, 2)); |
| 3427 | com_addbyte(c, POP_BLOCK); |
| 3428 | block_pop(c, SETUP_EXCEPT); |
| 3429 | com_addfwref(c, JUMP_FORWARD, &else_anchor); |
| 3430 | com_backpatch(c, except_anchor); |
| 3431 | for (i = 3; |
| 3432 | i < NCH(n) && TYPE(ch = CHILD(n, i)) == except_clause; |
| 3433 | i += 3) { |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 3434 | /* except_clause: 'except' [expr [',' var]] */ |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 3435 | if (except_anchor == 0) { |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 3436 | com_error(c, PyExc_SyntaxError, |
Guido van Rossum | 452a983 | 1996-09-17 14:32:04 +0000 | [diff] [blame] | 3437 | "default 'except:' must be last"); |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 3438 | break; |
| 3439 | } |
| 3440 | except_anchor = 0; |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 3441 | com_push(c, 3); /* tb, val, exc pushed by exception */ |
Michael W. Hudson | dd32a91 | 2002-08-15 14:59:02 +0000 | [diff] [blame] | 3442 | com_set_lineno(c, ch->n_lineno); |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 3443 | if (NCH(ch) > 1) { |
| 3444 | com_addbyte(c, DUP_TOP); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 3445 | com_push(c, 1); |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 3446 | com_node(c, CHILD(ch, 1)); |
Martin v. Löwis | 7198a52 | 2002-01-01 19:59:11 +0000 | [diff] [blame] | 3447 | com_addoparg(c, COMPARE_OP, PyCmp_EXC_MATCH); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 3448 | com_pop(c, 1); |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 3449 | com_addfwref(c, JUMP_IF_FALSE, &except_anchor); |
| 3450 | com_addbyte(c, POP_TOP); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 3451 | com_pop(c, 1); |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 3452 | } |
| 3453 | com_addbyte(c, POP_TOP); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 3454 | com_pop(c, 1); |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 3455 | if (NCH(ch) > 3) |
Thomas Wouters | 434d082 | 2000-08-24 20:11:32 +0000 | [diff] [blame] | 3456 | com_assign(c, CHILD(ch, 3), OP_ASSIGN, NULL); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 3457 | else { |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 3458 | com_addbyte(c, POP_TOP); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 3459 | com_pop(c, 1); |
| 3460 | } |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 3461 | com_addbyte(c, POP_TOP); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 3462 | com_pop(c, 1); |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 3463 | com_node(c, CHILD(n, i+2)); |
| 3464 | com_addfwref(c, JUMP_FORWARD, &end_anchor); |
| 3465 | if (except_anchor) { |
| 3466 | com_backpatch(c, except_anchor); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 3467 | /* We come in with [tb, val, exc, 0] on the |
| 3468 | stack; one pop and it's the same as |
| 3469 | expected at the start of the loop */ |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 3470 | com_addbyte(c, POP_TOP); |
| 3471 | } |
| 3472 | } |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 3473 | /* We actually come in here with [tb, val, exc] but the |
| 3474 | END_FINALLY will zap those and jump around. |
| 3475 | The c_stacklevel does not reflect them so we need not pop |
| 3476 | anything. */ |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 3477 | com_addbyte(c, END_FINALLY); |
| 3478 | com_backpatch(c, else_anchor); |
| 3479 | if (i < NCH(n)) |
| 3480 | com_node(c, CHILD(n, i+2)); |
| 3481 | com_backpatch(c, end_anchor); |
| 3482 | } |
| 3483 | |
| 3484 | static void |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 3485 | com_try_finally(struct compiling *c, node *n) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 3486 | { |
| 3487 | int finally_anchor = 0; |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 3488 | node *ch; |
Guido van Rossum | 94fb82e | 1992-04-05 14:24:50 +0000 | [diff] [blame] | 3489 | |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 3490 | com_addfwref(c, SETUP_FINALLY, &finally_anchor); |
| 3491 | block_push(c, SETUP_FINALLY); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 3492 | com_node(c, CHILD(n, 2)); |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 3493 | com_addbyte(c, POP_BLOCK); |
| 3494 | block_pop(c, SETUP_FINALLY); |
| 3495 | block_push(c, END_FINALLY); |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 3496 | com_addoparg(c, LOAD_CONST, com_addconst(c, Py_None)); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 3497 | /* While the generated code pushes only one item, |
| 3498 | the try-finally handling can enter here with |
| 3499 | up to three items. OK, here are the details: |
| 3500 | 3 for an exception, 2 for RETURN, 1 for BREAK. */ |
| 3501 | com_push(c, 3); |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 3502 | com_backpatch(c, finally_anchor); |
| 3503 | ch = CHILD(n, NCH(n)-1); |
Michael W. Hudson | dd32a91 | 2002-08-15 14:59:02 +0000 | [diff] [blame] | 3504 | com_set_lineno(c, ch->n_lineno); |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 3505 | com_node(c, ch); |
| 3506 | com_addbyte(c, END_FINALLY); |
| 3507 | block_pop(c, END_FINALLY); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 3508 | com_pop(c, 3); /* Matches the com_push above */ |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 3509 | } |
| 3510 | |
| 3511 | static void |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 3512 | com_try_stmt(struct compiling *c, node *n) |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 3513 | { |
| 3514 | REQ(n, try_stmt); |
| 3515 | /* 'try' ':' suite (except_clause ':' suite)+ ['else' ':' suite] |
| 3516 | | 'try' ':' suite 'finally' ':' suite */ |
| 3517 | if (TYPE(CHILD(n, 3)) != except_clause) |
| 3518 | com_try_finally(c, n); |
| 3519 | else |
| 3520 | com_try_except(c, n); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 3521 | } |
| 3522 | |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 3523 | static node * |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 3524 | get_rawdocstring(node *n) |
Guido van Rossum | 1f4fa50 | 1995-01-07 12:41:23 +0000 | [diff] [blame] | 3525 | { |
Guido van Rossum | 164d4ff | 1995-01-26 00:40:09 +0000 | [diff] [blame] | 3526 | int i; |
| 3527 | |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 3528 | /* Label to avoid tail recursion */ |
| 3529 | next: |
Guido van Rossum | 1f4fa50 | 1995-01-07 12:41:23 +0000 | [diff] [blame] | 3530 | switch (TYPE(n)) { |
| 3531 | |
| 3532 | case suite: |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 3533 | if (NCH(n) == 1) { |
| 3534 | n = CHILD(n, 0); |
| 3535 | goto next; |
Guido van Rossum | 1f4fa50 | 1995-01-07 12:41:23 +0000 | [diff] [blame] | 3536 | } |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 3537 | /* Fall through */ |
Guido van Rossum | 164d4ff | 1995-01-26 00:40:09 +0000 | [diff] [blame] | 3538 | case file_input: |
| 3539 | for (i = 0; i < NCH(n); i++) { |
| 3540 | node *ch = CHILD(n, i); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 3541 | if (TYPE(ch) == stmt) { |
| 3542 | n = ch; |
| 3543 | goto next; |
| 3544 | } |
Guido van Rossum | 164d4ff | 1995-01-26 00:40:09 +0000 | [diff] [blame] | 3545 | } |
| 3546 | break; |
| 3547 | |
Guido van Rossum | 1f4fa50 | 1995-01-07 12:41:23 +0000 | [diff] [blame] | 3548 | case stmt: |
| 3549 | case simple_stmt: |
| 3550 | case small_stmt: |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 3551 | n = CHILD(n, 0); |
| 3552 | goto next; |
Guido van Rossum | 1f4fa50 | 1995-01-07 12:41:23 +0000 | [diff] [blame] | 3553 | |
| 3554 | case expr_stmt: |
| 3555 | case testlist: |
Guido van Rossum | 2d3b986 | 2002-05-24 15:47:06 +0000 | [diff] [blame] | 3556 | case testlist1: |
Guido van Rossum | 1f4fa50 | 1995-01-07 12:41:23 +0000 | [diff] [blame] | 3557 | case test: |
| 3558 | case and_test: |
| 3559 | case not_test: |
| 3560 | case comparison: |
| 3561 | case expr: |
| 3562 | case xor_expr: |
| 3563 | case and_expr: |
| 3564 | case shift_expr: |
| 3565 | case arith_expr: |
| 3566 | case term: |
| 3567 | case factor: |
Guido van Rossum | 50564e8 | 1996-01-12 01:13:16 +0000 | [diff] [blame] | 3568 | case power: |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 3569 | if (NCH(n) == 1) { |
| 3570 | n = CHILD(n, 0); |
| 3571 | goto next; |
| 3572 | } |
Guido van Rossum | 1f4fa50 | 1995-01-07 12:41:23 +0000 | [diff] [blame] | 3573 | break; |
| 3574 | |
| 3575 | case atom: |
| 3576 | if (TYPE(CHILD(n, 0)) == STRING) |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 3577 | return n; |
Guido van Rossum | 1f4fa50 | 1995-01-07 12:41:23 +0000 | [diff] [blame] | 3578 | break; |
| 3579 | |
| 3580 | } |
| 3581 | return NULL; |
| 3582 | } |
| 3583 | |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 3584 | static PyObject * |
Martin v. Löwis | 339d0f7 | 2001-08-17 18:39:25 +0000 | [diff] [blame] | 3585 | get_docstring(struct compiling *c, node *n) |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 3586 | { |
Guido van Rossum | 541563e | 1999-01-28 15:08:09 +0000 | [diff] [blame] | 3587 | /* Don't generate doc-strings if run with -OO */ |
| 3588 | if (Py_OptimizeFlag > 1) |
| 3589 | return NULL; |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 3590 | n = get_rawdocstring(n); |
| 3591 | if (n == NULL) |
| 3592 | return NULL; |
Martin v. Löwis | 339d0f7 | 2001-08-17 18:39:25 +0000 | [diff] [blame] | 3593 | return parsestrplus(c, n); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 3594 | } |
| 3595 | |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 3596 | static void |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 3597 | com_suite(struct compiling *c, node *n) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 3598 | { |
| 3599 | REQ(n, suite); |
| 3600 | /* simple_stmt | NEWLINE INDENT NEWLINE* (stmt NEWLINE*)+ DEDENT */ |
| 3601 | if (NCH(n) == 1) { |
| 3602 | com_node(c, CHILD(n, 0)); |
| 3603 | } |
| 3604 | else { |
| 3605 | int i; |
Jeremy Hylton | cb17ae8 | 2001-02-09 22:22:18 +0000 | [diff] [blame] | 3606 | for (i = 0; i < NCH(n) && c->c_errors == 0; i++) { |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 3607 | node *ch = CHILD(n, i); |
| 3608 | if (TYPE(ch) == stmt) |
| 3609 | com_node(c, ch); |
| 3610 | } |
| 3611 | } |
| 3612 | } |
| 3613 | |
Guido van Rossum | f1aeab7 | 1992-03-27 17:28:26 +0000 | [diff] [blame] | 3614 | /* ARGSUSED */ |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 3615 | static void |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 3616 | com_continue_stmt(struct compiling *c, node *n) |
Guido van Rossum | 4bad92c | 1991-07-27 21:34:52 +0000 | [diff] [blame] | 3617 | { |
| 3618 | int i = c->c_nblocks; |
| 3619 | if (i-- > 0 && c->c_block[i] == SETUP_LOOP) { |
| 3620 | com_addoparg(c, JUMP_ABSOLUTE, c->c_begin); |
| 3621 | } |
Fred Drake | fd1f1be | 2000-09-08 16:31:24 +0000 | [diff] [blame] | 3622 | else if (i <= 0) { |
| 3623 | /* at the outer level */ |
| 3624 | com_error(c, PyExc_SyntaxError, |
| 3625 | "'continue' not properly in loop"); |
| 3626 | } |
Guido van Rossum | 4bad92c | 1991-07-27 21:34:52 +0000 | [diff] [blame] | 3627 | else { |
Fred Drake | fd1f1be | 2000-09-08 16:31:24 +0000 | [diff] [blame] | 3628 | int j; |
Jeremy Hylton | 3faa52e | 2001-02-01 22:48:12 +0000 | [diff] [blame] | 3629 | for (j = i-1; j >= 0; --j) { |
Fred Drake | fd1f1be | 2000-09-08 16:31:24 +0000 | [diff] [blame] | 3630 | if (c->c_block[j] == SETUP_LOOP) |
| 3631 | break; |
| 3632 | } |
Jeremy Hylton | 3faa52e | 2001-02-01 22:48:12 +0000 | [diff] [blame] | 3633 | if (j >= 0) { |
Fred Drake | fd1f1be | 2000-09-08 16:31:24 +0000 | [diff] [blame] | 3634 | /* there is a loop, but something interferes */ |
Jeremy Hylton | 3faa52e | 2001-02-01 22:48:12 +0000 | [diff] [blame] | 3635 | for (; i > j; --i) { |
| 3636 | if (c->c_block[i] == SETUP_EXCEPT || |
| 3637 | c->c_block[i] == SETUP_FINALLY) { |
| 3638 | com_addoparg(c, CONTINUE_LOOP, |
| 3639 | c->c_begin); |
Fred Drake | fd1f1be | 2000-09-08 16:31:24 +0000 | [diff] [blame] | 3640 | return; |
| 3641 | } |
Jeremy Hylton | 3faa52e | 2001-02-01 22:48:12 +0000 | [diff] [blame] | 3642 | if (c->c_block[i] == END_FINALLY) { |
| 3643 | com_error(c, PyExc_SyntaxError, |
| 3644 | "'continue' not supported inside 'finally' clause"); |
| 3645 | return; |
| 3646 | } |
Fred Drake | fd1f1be | 2000-09-08 16:31:24 +0000 | [diff] [blame] | 3647 | } |
| 3648 | } |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 3649 | com_error(c, PyExc_SyntaxError, |
| 3650 | "'continue' not properly in loop"); |
Guido van Rossum | 4bad92c | 1991-07-27 21:34:52 +0000 | [diff] [blame] | 3651 | } |
| 3652 | /* XXX Could allow it inside a 'finally' clause |
| 3653 | XXX if we could pop the exception still on the stack */ |
| 3654 | } |
| 3655 | |
Jeremy Hylton | 376e63d | 2003-08-28 14:42:14 +0000 | [diff] [blame] | 3656 | /* Return the number of default values in the argument list. |
| 3657 | |
| 3658 | If a non-default argument follows a default argument, set an |
| 3659 | exception and return -1. |
| 3660 | */ |
| 3661 | |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 3662 | static int |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 3663 | com_argdefs(struct compiling *c, node *n) |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 3664 | { |
Jeremy Hylton | 376e63d | 2003-08-28 14:42:14 +0000 | [diff] [blame] | 3665 | int i, nch, ndefs; |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 3666 | if (TYPE(n) == lambdef) { |
| 3667 | /* lambdef: 'lambda' [varargslist] ':' test */ |
| 3668 | n = CHILD(n, 1); |
| 3669 | } |
| 3670 | else { |
| 3671 | REQ(n, funcdef); /* funcdef: 'def' NAME parameters ... */ |
| 3672 | n = CHILD(n, 2); |
| 3673 | REQ(n, parameters); /* parameters: '(' [varargslist] ')' */ |
| 3674 | n = CHILD(n, 1); |
| 3675 | } |
| 3676 | if (TYPE(n) != varargslist) |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 3677 | return 0; |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 3678 | /* varargslist: |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 3679 | (fpdef ['=' test] ',')* '*' ....... | |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 3680 | fpdef ['=' test] (',' fpdef ['=' test])* [','] */ |
| 3681 | nch = NCH(n); |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 3682 | ndefs = 0; |
| 3683 | for (i = 0; i < nch; i++) { |
| 3684 | int t; |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 3685 | if (TYPE(CHILD(n, i)) == STAR || |
| 3686 | TYPE(CHILD(n, i)) == DOUBLESTAR) |
Guido van Rossum | f10570b | 1995-07-07 22:53:21 +0000 | [diff] [blame] | 3687 | break; |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 3688 | i++; |
| 3689 | if (i >= nch) |
Guido van Rossum | a1e7e62 | 1995-09-18 21:44:04 +0000 | [diff] [blame] | 3690 | t = RPAR; /* Anything except EQUAL or COMMA */ |
| 3691 | else |
| 3692 | t = TYPE(CHILD(n, i)); |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 3693 | if (t == EQUAL) { |
| 3694 | i++; |
| 3695 | ndefs++; |
| 3696 | com_node(c, CHILD(n, i)); |
| 3697 | i++; |
| 3698 | if (i >= nch) |
| 3699 | break; |
| 3700 | t = TYPE(CHILD(n, i)); |
| 3701 | } |
| 3702 | else { |
Guido van Rossum | 29d38cd | 1998-10-02 13:41:54 +0000 | [diff] [blame] | 3703 | /* Treat "(a=1, b)" as an error */ |
Jeremy Hylton | 376e63d | 2003-08-28 14:42:14 +0000 | [diff] [blame] | 3704 | if (ndefs) { |
Guido van Rossum | 29d38cd | 1998-10-02 13:41:54 +0000 | [diff] [blame] | 3705 | com_error(c, PyExc_SyntaxError, |
Guido van Rossum | dfede31 | 1998-10-02 14:06:56 +0000 | [diff] [blame] | 3706 | "non-default argument follows default argument"); |
Jeremy Hylton | 376e63d | 2003-08-28 14:42:14 +0000 | [diff] [blame] | 3707 | return -1; |
| 3708 | } |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 3709 | } |
| 3710 | if (t != COMMA) |
| 3711 | break; |
| 3712 | } |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 3713 | return ndefs; |
| 3714 | } |
| 3715 | |
Guido van Rossum | 4bad92c | 1991-07-27 21:34:52 +0000 | [diff] [blame] | 3716 | static void |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 3717 | com_funcdef(struct compiling *c, node *n) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 3718 | { |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 3719 | PyObject *co; |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 3720 | int ndefs; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 3721 | REQ(n, funcdef); /* funcdef: 'def' NAME parameters ':' suite */ |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 3722 | ndefs = com_argdefs(c, n); |
Jeremy Hylton | 376e63d | 2003-08-28 14:42:14 +0000 | [diff] [blame] | 3723 | if (ndefs < 0) |
| 3724 | return; |
Jeremy Hylton | 4b38da6 | 2001-02-02 18:19:15 +0000 | [diff] [blame] | 3725 | symtable_enter_scope(c->c_symtable, STR(CHILD(n, 1)), TYPE(n), |
| 3726 | n->n_lineno); |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 3727 | co = (PyObject *)icompile(n, c); |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 3728 | symtable_exit_scope(c->c_symtable); |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 3729 | if (co == NULL) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 3730 | c->c_errors++; |
| 3731 | else { |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 3732 | int closure = com_make_closure(c, (PyCodeObject *)co); |
| 3733 | int i = com_addconst(c, co); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 3734 | com_addoparg(c, LOAD_CONST, i); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 3735 | com_push(c, 1); |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 3736 | if (closure) |
| 3737 | com_addoparg(c, MAKE_CLOSURE, ndefs); |
| 3738 | else |
| 3739 | com_addoparg(c, MAKE_FUNCTION, ndefs); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 3740 | com_pop(c, ndefs); |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 3741 | com_addop_varname(c, VAR_STORE, STR(CHILD(n, 1))); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 3742 | com_pop(c, 1); |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 3743 | Py_DECREF(co); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 3744 | } |
| 3745 | } |
| 3746 | |
| 3747 | static void |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 3748 | com_bases(struct compiling *c, node *n) |
Guido van Rossum | c5e9629 | 1991-12-10 13:53:51 +0000 | [diff] [blame] | 3749 | { |
Guido van Rossum | f1aeab7 | 1992-03-27 17:28:26 +0000 | [diff] [blame] | 3750 | int i; |
Guido van Rossum | c5e9629 | 1991-12-10 13:53:51 +0000 | [diff] [blame] | 3751 | REQ(n, testlist); |
| 3752 | /* testlist: test (',' test)* [','] */ |
| 3753 | for (i = 0; i < NCH(n); i += 2) |
| 3754 | com_node(c, CHILD(n, i)); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 3755 | i = (NCH(n)+1) / 2; |
| 3756 | com_addoparg(c, BUILD_TUPLE, i); |
| 3757 | com_pop(c, i-1); |
Guido van Rossum | c5e9629 | 1991-12-10 13:53:51 +0000 | [diff] [blame] | 3758 | } |
| 3759 | |
| 3760 | static void |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 3761 | com_classdef(struct compiling *c, node *n) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 3762 | { |
Guido van Rossum | 2583165 | 1993-05-19 14:50:45 +0000 | [diff] [blame] | 3763 | int i; |
Jeremy Hylton | 93a569d | 2001-10-17 13:22:22 +0000 | [diff] [blame] | 3764 | PyObject *v; |
| 3765 | PyCodeObject *co; |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 3766 | char *name; |
| 3767 | |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 3768 | REQ(n, classdef); |
Guido van Rossum | 2583165 | 1993-05-19 14:50:45 +0000 | [diff] [blame] | 3769 | /* classdef: class NAME ['(' testlist ')'] ':' suite */ |
Guido van Rossum | 7b89b6a | 1997-01-18 08:02:57 +0000 | [diff] [blame] | 3770 | if ((v = PyString_InternFromString(STR(CHILD(n, 1)))) == NULL) { |
Guido van Rossum | 2583165 | 1993-05-19 14:50:45 +0000 | [diff] [blame] | 3771 | c->c_errors++; |
| 3772 | return; |
| 3773 | } |
| 3774 | /* Push the class name on the stack */ |
| 3775 | i = com_addconst(c, v); |
| 3776 | com_addoparg(c, LOAD_CONST, i); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 3777 | com_push(c, 1); |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 3778 | Py_DECREF(v); |
Guido van Rossum | 2583165 | 1993-05-19 14:50:45 +0000 | [diff] [blame] | 3779 | /* Push the tuple of base classes on the stack */ |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 3780 | if (TYPE(CHILD(n, 2)) != LPAR) { |
Guido van Rossum | c5e9629 | 1991-12-10 13:53:51 +0000 | [diff] [blame] | 3781 | com_addoparg(c, BUILD_TUPLE, 0); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 3782 | com_push(c, 1); |
| 3783 | } |
Guido van Rossum | 2583165 | 1993-05-19 14:50:45 +0000 | [diff] [blame] | 3784 | else |
| 3785 | com_bases(c, CHILD(n, 3)); |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 3786 | name = STR(CHILD(n, 1)); |
Jeremy Hylton | 4b38da6 | 2001-02-02 18:19:15 +0000 | [diff] [blame] | 3787 | symtable_enter_scope(c->c_symtable, name, TYPE(n), n->n_lineno); |
Jeremy Hylton | 93a569d | 2001-10-17 13:22:22 +0000 | [diff] [blame] | 3788 | co = icompile(n, c); |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 3789 | symtable_exit_scope(c->c_symtable); |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 3790 | if (co == NULL) |
Guido van Rossum | d6f3bc2 | 1990-11-18 17:35:03 +0000 | [diff] [blame] | 3791 | c->c_errors++; |
| 3792 | else { |
Jeremy Hylton | 93a569d | 2001-10-17 13:22:22 +0000 | [diff] [blame] | 3793 | int closure = com_make_closure(c, co); |
| 3794 | i = com_addconst(c, (PyObject *)co); |
Guido van Rossum | d6f3bc2 | 1990-11-18 17:35:03 +0000 | [diff] [blame] | 3795 | com_addoparg(c, LOAD_CONST, i); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 3796 | com_push(c, 1); |
Jeremy Hylton | 93a569d | 2001-10-17 13:22:22 +0000 | [diff] [blame] | 3797 | if (closure) { |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 3798 | com_addoparg(c, MAKE_CLOSURE, 0); |
Jeremy Hylton | 733c893 | 2001-12-13 19:51:56 +0000 | [diff] [blame] | 3799 | com_pop(c, PyCode_GetNumFree(co)); |
Jeremy Hylton | 93a569d | 2001-10-17 13:22:22 +0000 | [diff] [blame] | 3800 | } else |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 3801 | com_addoparg(c, MAKE_FUNCTION, 0); |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 3802 | com_addoparg(c, CALL_FUNCTION, 0); |
Guido van Rossum | d6f3bc2 | 1990-11-18 17:35:03 +0000 | [diff] [blame] | 3803 | com_addbyte(c, BUILD_CLASS); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 3804 | com_pop(c, 2); |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 3805 | com_addop_varname(c, VAR_STORE, STR(CHILD(n, 1))); |
Jeremy Hylton | 93a569d | 2001-10-17 13:22:22 +0000 | [diff] [blame] | 3806 | com_pop(c, 1); |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 3807 | Py_DECREF(co); |
Guido van Rossum | d6f3bc2 | 1990-11-18 17:35:03 +0000 | [diff] [blame] | 3808 | } |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 3809 | } |
| 3810 | |
| 3811 | static void |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 3812 | com_node(struct compiling *c, node *n) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 3813 | { |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 3814 | loop: |
Jeremy Hylton | cb17ae8 | 2001-02-09 22:22:18 +0000 | [diff] [blame] | 3815 | if (c->c_errors) |
| 3816 | return; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 3817 | switch (TYPE(n)) { |
| 3818 | |
| 3819 | /* Definition nodes */ |
| 3820 | |
| 3821 | case funcdef: |
| 3822 | com_funcdef(c, n); |
| 3823 | break; |
| 3824 | case classdef: |
| 3825 | com_classdef(c, n); |
| 3826 | break; |
| 3827 | |
| 3828 | /* Trivial parse tree nodes */ |
| 3829 | |
| 3830 | case stmt: |
Guido van Rossum | 4bad92c | 1991-07-27 21:34:52 +0000 | [diff] [blame] | 3831 | case small_stmt: |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 3832 | case flow_stmt: |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 3833 | n = CHILD(n, 0); |
| 3834 | goto loop; |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 3835 | |
| 3836 | case simple_stmt: |
Guido van Rossum | 4bad92c | 1991-07-27 21:34:52 +0000 | [diff] [blame] | 3837 | /* small_stmt (';' small_stmt)* [';'] NEWLINE */ |
Michael W. Hudson | dd32a91 | 2002-08-15 14:59:02 +0000 | [diff] [blame] | 3838 | com_set_lineno(c, n->n_lineno); |
Guido van Rossum | 4bad92c | 1991-07-27 21:34:52 +0000 | [diff] [blame] | 3839 | { |
| 3840 | int i; |
| 3841 | for (i = 0; i < NCH(n)-1; i += 2) |
| 3842 | com_node(c, CHILD(n, i)); |
| 3843 | } |
| 3844 | break; |
| 3845 | |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 3846 | case compound_stmt: |
Michael W. Hudson | dd32a91 | 2002-08-15 14:59:02 +0000 | [diff] [blame] | 3847 | com_set_lineno(c, n->n_lineno); |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 3848 | n = CHILD(n, 0); |
| 3849 | goto loop; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 3850 | |
| 3851 | /* Statement nodes */ |
| 3852 | |
| 3853 | case expr_stmt: |
| 3854 | com_expr_stmt(c, n); |
| 3855 | break; |
| 3856 | case print_stmt: |
| 3857 | com_print_stmt(c, n); |
| 3858 | break; |
Guido van Rossum | 4bad92c | 1991-07-27 21:34:52 +0000 | [diff] [blame] | 3859 | case del_stmt: /* 'del' exprlist */ |
Thomas Wouters | 434d082 | 2000-08-24 20:11:32 +0000 | [diff] [blame] | 3860 | com_assign(c, CHILD(n, 1), OP_DELETE, NULL); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 3861 | break; |
| 3862 | case pass_stmt: |
| 3863 | break; |
| 3864 | case break_stmt: |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 3865 | if (c->c_loops == 0) { |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 3866 | com_error(c, PyExc_SyntaxError, |
| 3867 | "'break' outside loop"); |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 3868 | } |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 3869 | com_addbyte(c, BREAK_LOOP); |
| 3870 | break; |
Guido van Rossum | 4bad92c | 1991-07-27 21:34:52 +0000 | [diff] [blame] | 3871 | case continue_stmt: |
| 3872 | com_continue_stmt(c, n); |
| 3873 | break; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 3874 | case return_stmt: |
| 3875 | com_return_stmt(c, n); |
| 3876 | break; |
Tim Peters | 5ca576e | 2001-06-18 22:08:13 +0000 | [diff] [blame] | 3877 | case yield_stmt: |
| 3878 | com_yield_stmt(c, n); |
| 3879 | break; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 3880 | case raise_stmt: |
| 3881 | com_raise_stmt(c, n); |
| 3882 | break; |
| 3883 | case import_stmt: |
| 3884 | com_import_stmt(c, n); |
| 3885 | break; |
Guido van Rossum | c5e9629 | 1991-12-10 13:53:51 +0000 | [diff] [blame] | 3886 | case global_stmt: |
Guido van Rossum | c5e9629 | 1991-12-10 13:53:51 +0000 | [diff] [blame] | 3887 | break; |
Guido van Rossum | db3165e | 1993-10-18 17:06:59 +0000 | [diff] [blame] | 3888 | case exec_stmt: |
| 3889 | com_exec_stmt(c, n); |
| 3890 | break; |
Guido van Rossum | 228d7f3 | 1997-04-02 05:24:36 +0000 | [diff] [blame] | 3891 | case assert_stmt: |
| 3892 | com_assert_stmt(c, n); |
| 3893 | break; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 3894 | case if_stmt: |
| 3895 | com_if_stmt(c, n); |
| 3896 | break; |
| 3897 | case while_stmt: |
| 3898 | com_while_stmt(c, n); |
| 3899 | break; |
| 3900 | case for_stmt: |
| 3901 | com_for_stmt(c, n); |
| 3902 | break; |
| 3903 | case try_stmt: |
| 3904 | com_try_stmt(c, n); |
| 3905 | break; |
| 3906 | case suite: |
| 3907 | com_suite(c, n); |
| 3908 | break; |
| 3909 | |
| 3910 | /* Expression nodes */ |
| 3911 | |
| 3912 | case testlist: |
Guido van Rossum | 2d3b986 | 2002-05-24 15:47:06 +0000 | [diff] [blame] | 3913 | case testlist1: |
Guido van Rossum | 1c91707 | 2001-10-15 15:44:05 +0000 | [diff] [blame] | 3914 | case testlist_safe: |
Guido van Rossum | 288a60f | 1991-12-16 13:05:10 +0000 | [diff] [blame] | 3915 | com_list(c, n, 0); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 3916 | break; |
| 3917 | case test: |
| 3918 | com_test(c, n); |
| 3919 | break; |
| 3920 | case and_test: |
| 3921 | com_and_test(c, n); |
| 3922 | break; |
| 3923 | case not_test: |
| 3924 | com_not_test(c, n); |
| 3925 | break; |
| 3926 | case comparison: |
| 3927 | com_comparison(c, n); |
| 3928 | break; |
| 3929 | case exprlist: |
Guido van Rossum | 288a60f | 1991-12-16 13:05:10 +0000 | [diff] [blame] | 3930 | com_list(c, n, 0); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 3931 | break; |
| 3932 | case expr: |
| 3933 | com_expr(c, n); |
| 3934 | break; |
Guido van Rossum | 7928cd7 | 1991-10-24 14:59:31 +0000 | [diff] [blame] | 3935 | case xor_expr: |
| 3936 | com_xor_expr(c, n); |
| 3937 | break; |
| 3938 | case and_expr: |
| 3939 | com_and_expr(c, n); |
| 3940 | break; |
| 3941 | case shift_expr: |
| 3942 | com_shift_expr(c, n); |
| 3943 | break; |
| 3944 | case arith_expr: |
| 3945 | com_arith_expr(c, n); |
| 3946 | break; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 3947 | case term: |
| 3948 | com_term(c, n); |
| 3949 | break; |
| 3950 | case factor: |
| 3951 | com_factor(c, n); |
| 3952 | break; |
Guido van Rossum | 50564e8 | 1996-01-12 01:13:16 +0000 | [diff] [blame] | 3953 | case power: |
| 3954 | com_power(c, n); |
| 3955 | break; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 3956 | case atom: |
| 3957 | com_atom(c, n); |
| 3958 | break; |
| 3959 | |
| 3960 | default: |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 3961 | com_error(c, PyExc_SystemError, |
| 3962 | "com_node: unexpected node type"); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 3963 | } |
| 3964 | } |
| 3965 | |
Tim Peters | dbd9ba6 | 2000-07-09 03:09:57 +0000 | [diff] [blame] | 3966 | static void com_fplist(struct compiling *, node *); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 3967 | |
| 3968 | static void |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 3969 | com_fpdef(struct compiling *c, node *n) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 3970 | { |
| 3971 | REQ(n, fpdef); /* fpdef: NAME | '(' fplist ')' */ |
| 3972 | if (TYPE(CHILD(n, 0)) == LPAR) |
| 3973 | com_fplist(c, CHILD(n, 1)); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 3974 | else { |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 3975 | com_addop_varname(c, VAR_STORE, STR(CHILD(n, 0))); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 3976 | com_pop(c, 1); |
| 3977 | } |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 3978 | } |
| 3979 | |
| 3980 | static void |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 3981 | com_fplist(struct compiling *c, node *n) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 3982 | { |
Guido van Rossum | a9df32a | 1991-12-31 13:13:35 +0000 | [diff] [blame] | 3983 | REQ(n, fplist); /* fplist: fpdef (',' fpdef)* [','] */ |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 3984 | if (NCH(n) == 1) { |
| 3985 | com_fpdef(c, CHILD(n, 0)); |
| 3986 | } |
| 3987 | else { |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 3988 | int i = (NCH(n)+1)/2; |
Thomas Wouters | 0be5aab | 2000-08-11 22:15:52 +0000 | [diff] [blame] | 3989 | com_addoparg(c, UNPACK_SEQUENCE, i); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 3990 | com_push(c, i-1); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 3991 | for (i = 0; i < NCH(n); i += 2) |
| 3992 | com_fpdef(c, CHILD(n, i)); |
| 3993 | } |
| 3994 | } |
| 3995 | |
| 3996 | static void |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 3997 | com_arglist(struct compiling *c, node *n) |
Guido van Rossum | 49d6dc4 | 1992-01-14 18:30:26 +0000 | [diff] [blame] | 3998 | { |
Guido van Rossum | 633d90c | 2002-12-23 16:51:42 +0000 | [diff] [blame] | 3999 | int nch, i, narg; |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 4000 | int complex = 0; |
Guido van Rossum | 633d90c | 2002-12-23 16:51:42 +0000 | [diff] [blame] | 4001 | char nbuf[30]; |
Guido van Rossum | 49d6dc4 | 1992-01-14 18:30:26 +0000 | [diff] [blame] | 4002 | REQ(n, varargslist); |
Guido van Rossum | acbefef | 1992-01-19 16:33:51 +0000 | [diff] [blame] | 4003 | /* varargslist: |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 4004 | (fpdef ['=' test] ',')* (fpdef ['=' test] | '*' .....) */ |
Guido van Rossum | 633d90c | 2002-12-23 16:51:42 +0000 | [diff] [blame] | 4005 | nch = NCH(n); |
| 4006 | /* Enter all arguments in table of locals */ |
| 4007 | for (i = 0, narg = 0; i < nch; i++) { |
| 4008 | node *ch = CHILD(n, i); |
| 4009 | node *fp; |
| 4010 | if (TYPE(ch) == STAR || TYPE(ch) == DOUBLESTAR) |
Guido van Rossum | 49d6dc4 | 1992-01-14 18:30:26 +0000 | [diff] [blame] | 4011 | break; |
Guido van Rossum | 633d90c | 2002-12-23 16:51:42 +0000 | [diff] [blame] | 4012 | REQ(ch, fpdef); /* fpdef: NAME | '(' fplist ')' */ |
| 4013 | fp = CHILD(ch, 0); |
| 4014 | if (TYPE(fp) != NAME) { |
| 4015 | PyOS_snprintf(nbuf, sizeof(nbuf), ".%d", i); |
| 4016 | complex = 1; |
Guido van Rossum | 9c8a086 | 2002-12-23 16:35:23 +0000 | [diff] [blame] | 4017 | } |
Guido van Rossum | 633d90c | 2002-12-23 16:51:42 +0000 | [diff] [blame] | 4018 | narg++; |
| 4019 | /* all name updates handled by symtable */ |
| 4020 | if (++i >= nch) |
| 4021 | break; |
| 4022 | ch = CHILD(n, i); |
| 4023 | if (TYPE(ch) == EQUAL) |
| 4024 | i += 2; |
| 4025 | else |
| 4026 | REQ(ch, COMMA); |
| 4027 | } |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 4028 | if (complex) { |
| 4029 | /* Generate code for complex arguments only after |
| 4030 | having counted the simple arguments */ |
| 4031 | int ilocal = 0; |
Guido van Rossum | 633d90c | 2002-12-23 16:51:42 +0000 | [diff] [blame] | 4032 | for (i = 0; i < nch; i++) { |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 4033 | node *ch = CHILD(n, i); |
| 4034 | node *fp; |
Guido van Rossum | 50564e8 | 1996-01-12 01:13:16 +0000 | [diff] [blame] | 4035 | if (TYPE(ch) == STAR || TYPE(ch) == DOUBLESTAR) |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 4036 | break; |
| 4037 | REQ(ch, fpdef); /* fpdef: NAME | '(' fplist ')' */ |
| 4038 | fp = CHILD(ch, 0); |
| 4039 | if (TYPE(fp) != NAME) { |
| 4040 | com_addoparg(c, LOAD_FAST, ilocal); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 4041 | com_push(c, 1); |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 4042 | com_fpdef(c, ch); |
| 4043 | } |
| 4044 | ilocal++; |
Guido van Rossum | 633d90c | 2002-12-23 16:51:42 +0000 | [diff] [blame] | 4045 | if (++i >= nch) |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 4046 | break; |
| 4047 | ch = CHILD(n, i); |
| 4048 | if (TYPE(ch) == EQUAL) |
| 4049 | i += 2; |
| 4050 | else |
| 4051 | REQ(ch, COMMA); |
| 4052 | } |
| 4053 | } |
Guido van Rossum | 49d6dc4 | 1992-01-14 18:30:26 +0000 | [diff] [blame] | 4054 | } |
| 4055 | |
| 4056 | static void |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 4057 | com_file_input(struct compiling *c, node *n) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 4058 | { |
| 4059 | int i; |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 4060 | PyObject *doc; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 4061 | REQ(n, file_input); /* (NEWLINE | stmt)* ENDMARKER */ |
Martin v. Löwis | 339d0f7 | 2001-08-17 18:39:25 +0000 | [diff] [blame] | 4062 | doc = get_docstring(c, n); |
Guido van Rossum | 1f4fa50 | 1995-01-07 12:41:23 +0000 | [diff] [blame] | 4063 | if (doc != NULL) { |
| 4064 | int i = com_addconst(c, doc); |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 4065 | Py_DECREF(doc); |
Guido van Rossum | 1f4fa50 | 1995-01-07 12:41:23 +0000 | [diff] [blame] | 4066 | com_addoparg(c, LOAD_CONST, i); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 4067 | com_push(c, 1); |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 4068 | com_addop_name(c, STORE_NAME, "__doc__"); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 4069 | com_pop(c, 1); |
Guido van Rossum | 1f4fa50 | 1995-01-07 12:41:23 +0000 | [diff] [blame] | 4070 | } |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 4071 | for (i = 0; i < NCH(n); i++) { |
| 4072 | node *ch = CHILD(n, i); |
| 4073 | if (TYPE(ch) != ENDMARKER && TYPE(ch) != NEWLINE) |
| 4074 | com_node(c, ch); |
| 4075 | } |
| 4076 | } |
| 4077 | |
| 4078 | /* Top-level compile-node interface */ |
| 4079 | |
| 4080 | static void |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 4081 | compile_funcdef(struct compiling *c, node *n) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 4082 | { |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 4083 | PyObject *doc; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 4084 | node *ch; |
| 4085 | REQ(n, funcdef); /* funcdef: 'def' NAME parameters ':' suite */ |
Guido van Rossum | 9bfef44 | 1993-03-29 10:43:31 +0000 | [diff] [blame] | 4086 | c->c_name = STR(CHILD(n, 1)); |
Martin v. Löwis | 339d0f7 | 2001-08-17 18:39:25 +0000 | [diff] [blame] | 4087 | doc = get_docstring(c, CHILD(n, 4)); |
Guido van Rossum | 1f4fa50 | 1995-01-07 12:41:23 +0000 | [diff] [blame] | 4088 | if (doc != NULL) { |
| 4089 | (void) com_addconst(c, doc); |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 4090 | Py_DECREF(doc); |
Guido van Rossum | 1f4fa50 | 1995-01-07 12:41:23 +0000 | [diff] [blame] | 4091 | } |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 4092 | else |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 4093 | (void) com_addconst(c, Py_None); /* No docstring */ |
Guido van Rossum | 49d6dc4 | 1992-01-14 18:30:26 +0000 | [diff] [blame] | 4094 | ch = CHILD(n, 2); /* parameters: '(' [varargslist] ')' */ |
| 4095 | ch = CHILD(ch, 1); /* ')' | varargslist */ |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 4096 | if (TYPE(ch) == varargslist) |
Guido van Rossum | 49d6dc4 | 1992-01-14 18:30:26 +0000 | [diff] [blame] | 4097 | com_arglist(c, ch); |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 4098 | c->c_infunction = 1; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 4099 | com_node(c, CHILD(n, 4)); |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 4100 | c->c_infunction = 0; |
Michael W. Hudson | 53d58bb | 2002-08-30 13:09:51 +0000 | [diff] [blame] | 4101 | com_addoparg(c, LOAD_CONST, com_addconst(c, Py_None)); |
| 4102 | com_push(c, 1); |
| 4103 | com_addbyte(c, RETURN_VALUE); |
| 4104 | com_pop(c, 1); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 4105 | } |
| 4106 | |
| 4107 | static void |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 4108 | compile_lambdef(struct compiling *c, node *n) |
Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 4109 | { |
Guido van Rossum | 590baa4 | 1993-11-30 13:40:46 +0000 | [diff] [blame] | 4110 | node *ch; |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 4111 | REQ(n, lambdef); /* lambdef: 'lambda' [varargslist] ':' test */ |
Guido van Rossum | 363ac7d | 1994-11-10 22:40:34 +0000 | [diff] [blame] | 4112 | c->c_name = "<lambda>"; |
Guido van Rossum | 590baa4 | 1993-11-30 13:40:46 +0000 | [diff] [blame] | 4113 | |
| 4114 | ch = CHILD(n, 1); |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 4115 | (void) com_addconst(c, Py_None); /* No docstring */ |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 4116 | if (TYPE(ch) == varargslist) { |
Guido van Rossum | 590baa4 | 1993-11-30 13:40:46 +0000 | [diff] [blame] | 4117 | com_arglist(c, ch); |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 4118 | ch = CHILD(n, 3); |
Guido van Rossum | 590baa4 | 1993-11-30 13:40:46 +0000 | [diff] [blame] | 4119 | } |
Guido van Rossum | 681d79a | 1995-07-18 14:51:37 +0000 | [diff] [blame] | 4120 | else |
| 4121 | ch = CHILD(n, 2); |
| 4122 | com_node(c, ch); |
Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 4123 | com_addbyte(c, RETURN_VALUE); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 4124 | com_pop(c, 1); |
Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 4125 | } |
| 4126 | |
| 4127 | static void |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 4128 | compile_classdef(struct compiling *c, node *n) |
Guido van Rossum | 1f4fa50 | 1995-01-07 12:41:23 +0000 | [diff] [blame] | 4129 | { |
| 4130 | node *ch; |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 4131 | PyObject *doc; |
Guido van Rossum | 1f4fa50 | 1995-01-07 12:41:23 +0000 | [diff] [blame] | 4132 | REQ(n, classdef); |
| 4133 | /* classdef: 'class' NAME ['(' testlist ')'] ':' suite */ |
| 4134 | c->c_name = STR(CHILD(n, 1)); |
Guido van Rossum | 8ff077b | 1996-08-24 06:21:31 +0000 | [diff] [blame] | 4135 | c->c_private = c->c_name; |
Guido van Rossum | 340cbe7 | 2002-01-15 21:06:07 +0000 | [diff] [blame] | 4136 | /* Initialize local __module__ from global __name__ */ |
| 4137 | com_addop_name(c, LOAD_GLOBAL, "__name__"); |
| 4138 | com_addop_name(c, STORE_NAME, "__module__"); |
Guido van Rossum | 1f4fa50 | 1995-01-07 12:41:23 +0000 | [diff] [blame] | 4139 | ch = CHILD(n, NCH(n)-1); /* The suite */ |
Martin v. Löwis | 339d0f7 | 2001-08-17 18:39:25 +0000 | [diff] [blame] | 4140 | doc = get_docstring(c, ch); |
Guido van Rossum | 1f4fa50 | 1995-01-07 12:41:23 +0000 | [diff] [blame] | 4141 | if (doc != NULL) { |
| 4142 | int i = com_addconst(c, doc); |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 4143 | Py_DECREF(doc); |
Guido van Rossum | 1f4fa50 | 1995-01-07 12:41:23 +0000 | [diff] [blame] | 4144 | com_addoparg(c, LOAD_CONST, i); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 4145 | com_push(c, 1); |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 4146 | com_addop_name(c, STORE_NAME, "__doc__"); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 4147 | com_pop(c, 1); |
Guido van Rossum | 1f4fa50 | 1995-01-07 12:41:23 +0000 | [diff] [blame] | 4148 | } |
| 4149 | else |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 4150 | (void) com_addconst(c, Py_None); |
Guido van Rossum | 1f4fa50 | 1995-01-07 12:41:23 +0000 | [diff] [blame] | 4151 | com_node(c, ch); |
| 4152 | com_addbyte(c, LOAD_LOCALS); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 4153 | com_push(c, 1); |
Guido van Rossum | 1f4fa50 | 1995-01-07 12:41:23 +0000 | [diff] [blame] | 4154 | com_addbyte(c, RETURN_VALUE); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 4155 | com_pop(c, 1); |
Guido van Rossum | 1f4fa50 | 1995-01-07 12:41:23 +0000 | [diff] [blame] | 4156 | } |
| 4157 | |
| 4158 | static void |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 4159 | compile_node(struct compiling *c, node *n) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 4160 | { |
Michael W. Hudson | dd32a91 | 2002-08-15 14:59:02 +0000 | [diff] [blame] | 4161 | com_set_lineno(c, n->n_lineno); |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 4162 | |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 4163 | switch (TYPE(n)) { |
| 4164 | |
Guido van Rossum | 4c41778 | 1991-01-21 16:09:22 +0000 | [diff] [blame] | 4165 | case single_input: /* One interactive command */ |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 4166 | /* NEWLINE | simple_stmt | compound_stmt NEWLINE */ |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 4167 | c->c_interactive++; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 4168 | n = CHILD(n, 0); |
| 4169 | if (TYPE(n) != NEWLINE) |
| 4170 | com_node(c, n); |
Michael W. Hudson | 53d58bb | 2002-08-30 13:09:51 +0000 | [diff] [blame] | 4171 | com_addoparg(c, LOAD_CONST, com_addconst(c, Py_None)); |
| 4172 | com_push(c, 1); |
| 4173 | com_addbyte(c, RETURN_VALUE); |
| 4174 | com_pop(c, 1); |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 4175 | c->c_interactive--; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 4176 | break; |
| 4177 | |
Guido van Rossum | 4c41778 | 1991-01-21 16:09:22 +0000 | [diff] [blame] | 4178 | case file_input: /* A whole file, or built-in function exec() */ |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 4179 | com_file_input(c, n); |
Michael W. Hudson | 53d58bb | 2002-08-30 13:09:51 +0000 | [diff] [blame] | 4180 | com_addoparg(c, LOAD_CONST, com_addconst(c, Py_None)); |
| 4181 | com_push(c, 1); |
| 4182 | com_addbyte(c, RETURN_VALUE); |
| 4183 | com_pop(c, 1); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 4184 | break; |
| 4185 | |
Guido van Rossum | 590baa4 | 1993-11-30 13:40:46 +0000 | [diff] [blame] | 4186 | case eval_input: /* Built-in function input() */ |
Guido van Rossum | 4c41778 | 1991-01-21 16:09:22 +0000 | [diff] [blame] | 4187 | com_node(c, CHILD(n, 0)); |
| 4188 | com_addbyte(c, RETURN_VALUE); |
Guido van Rossum | 8b993a9 | 1997-01-17 21:04:03 +0000 | [diff] [blame] | 4189 | com_pop(c, 1); |
Guido van Rossum | 4c41778 | 1991-01-21 16:09:22 +0000 | [diff] [blame] | 4190 | break; |
| 4191 | |
Guido van Rossum | 590baa4 | 1993-11-30 13:40:46 +0000 | [diff] [blame] | 4192 | case lambdef: /* anonymous function definition */ |
| 4193 | compile_lambdef(c, n); |
| 4194 | break; |
| 4195 | |
Guido van Rossum | 4c41778 | 1991-01-21 16:09:22 +0000 | [diff] [blame] | 4196 | case funcdef: /* A function definition */ |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 4197 | compile_funcdef(c, n); |
| 4198 | break; |
| 4199 | |
Guido van Rossum | 4c41778 | 1991-01-21 16:09:22 +0000 | [diff] [blame] | 4200 | case classdef: /* A class definition */ |
Guido van Rossum | 1f4fa50 | 1995-01-07 12:41:23 +0000 | [diff] [blame] | 4201 | compile_classdef(c, n); |
Guido van Rossum | d6f3bc2 | 1990-11-18 17:35:03 +0000 | [diff] [blame] | 4202 | break; |
| 4203 | |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 4204 | default: |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 4205 | com_error(c, PyExc_SystemError, |
Guido van Rossum | 452a983 | 1996-09-17 14:32:04 +0000 | [diff] [blame] | 4206 | "compile_node: unexpected node type"); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 4207 | } |
| 4208 | } |
| 4209 | |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 4210 | static PyObject * |
| 4211 | dict_keys_inorder(PyObject *dict, int offset) |
| 4212 | { |
| 4213 | PyObject *tuple, *k, *v; |
| 4214 | int i, pos = 0, size = PyDict_Size(dict); |
| 4215 | |
| 4216 | tuple = PyTuple_New(size); |
| 4217 | if (tuple == NULL) |
| 4218 | return NULL; |
| 4219 | while (PyDict_Next(dict, &pos, &k, &v)) { |
| 4220 | i = PyInt_AS_LONG(v); |
| 4221 | Py_INCREF(k); |
Jeremy Hylton | ce7ef59 | 2001-03-20 00:25:43 +0000 | [diff] [blame] | 4222 | assert((i - offset) < size); |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 4223 | PyTuple_SET_ITEM(tuple, i - offset, k); |
| 4224 | } |
| 4225 | return tuple; |
| 4226 | } |
| 4227 | |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 4228 | PyCodeObject * |
Martin v. Löwis | 95292d6 | 2002-12-11 14:04:59 +0000 | [diff] [blame] | 4229 | PyNode_Compile(node *n, const char *filename) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 4230 | { |
Jeremy Hylton | 9f324e9 | 2001-03-01 22:59:14 +0000 | [diff] [blame] | 4231 | return PyNode_CompileFlags(n, filename, NULL); |
| 4232 | } |
| 4233 | |
| 4234 | PyCodeObject * |
Martin v. Löwis | 95292d6 | 2002-12-11 14:04:59 +0000 | [diff] [blame] | 4235 | PyNode_CompileFlags(node *n, const char *filename, PyCompilerFlags *flags) |
Jeremy Hylton | 9f324e9 | 2001-03-01 22:59:14 +0000 | [diff] [blame] | 4236 | { |
| 4237 | return jcompile(n, filename, NULL, flags); |
Guido van Rossum | 8ff077b | 1996-08-24 06:21:31 +0000 | [diff] [blame] | 4238 | } |
| 4239 | |
Jeremy Hylton | 4b38da6 | 2001-02-02 18:19:15 +0000 | [diff] [blame] | 4240 | struct symtable * |
Martin v. Löwis | 95292d6 | 2002-12-11 14:04:59 +0000 | [diff] [blame] | 4241 | PyNode_CompileSymtable(node *n, const char *filename) |
Jeremy Hylton | 4b38da6 | 2001-02-02 18:19:15 +0000 | [diff] [blame] | 4242 | { |
| 4243 | struct symtable *st; |
Jeremy Hylton | ded4bd7 | 2001-03-21 19:01:33 +0000 | [diff] [blame] | 4244 | PyFutureFeatures *ff; |
Jeremy Hylton | 4b38da6 | 2001-02-02 18:19:15 +0000 | [diff] [blame] | 4245 | |
Jeremy Hylton | ded4bd7 | 2001-03-21 19:01:33 +0000 | [diff] [blame] | 4246 | ff = PyNode_Future(n, filename); |
| 4247 | if (ff == NULL) |
| 4248 | return NULL; |
Jeremy Hylton | 1955fcf | 2003-07-15 20:23:26 +0000 | [diff] [blame] | 4249 | st = symtable_build(n, ff, filename); |
Tim Peters | 8c5e415 | 2001-11-04 19:26:58 +0000 | [diff] [blame] | 4250 | if (st == NULL) { |
Andrew MacIntyre | 80d4e2a | 2002-08-04 06:28:21 +0000 | [diff] [blame] | 4251 | PyObject_FREE((void *)ff); |
Jeremy Hylton | 4b38da6 | 2001-02-02 18:19:15 +0000 | [diff] [blame] | 4252 | return NULL; |
Tim Peters | 8c5e415 | 2001-11-04 19:26:58 +0000 | [diff] [blame] | 4253 | } |
Jeremy Hylton | 4b38da6 | 2001-02-02 18:19:15 +0000 | [diff] [blame] | 4254 | return st; |
| 4255 | } |
| 4256 | |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 4257 | static PyCodeObject * |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 4258 | icompile(node *n, struct compiling *base) |
Guido van Rossum | 8ff077b | 1996-08-24 06:21:31 +0000 | [diff] [blame] | 4259 | { |
Jeremy Hylton | 9f324e9 | 2001-03-01 22:59:14 +0000 | [diff] [blame] | 4260 | return jcompile(n, base->c_filename, base, NULL); |
Guido van Rossum | 8ff077b | 1996-08-24 06:21:31 +0000 | [diff] [blame] | 4261 | } |
| 4262 | |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 4263 | static PyCodeObject * |
Martin v. Löwis | 95292d6 | 2002-12-11 14:04:59 +0000 | [diff] [blame] | 4264 | jcompile(node *n, const char *filename, struct compiling *base, |
Jeremy Hylton | 9f324e9 | 2001-03-01 22:59:14 +0000 | [diff] [blame] | 4265 | PyCompilerFlags *flags) |
Guido van Rossum | 8ff077b | 1996-08-24 06:21:31 +0000 | [diff] [blame] | 4266 | { |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 4267 | struct compiling sc; |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 4268 | PyCodeObject *co; |
Guido van Rossum | 590baa4 | 1993-11-30 13:40:46 +0000 | [diff] [blame] | 4269 | if (!com_init(&sc, filename)) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 4270 | return NULL; |
Just van Rossum | 3aaf42c | 2003-02-10 08:21:10 +0000 | [diff] [blame] | 4271 | if (flags && flags->cf_flags & PyCF_SOURCE_IS_UTF8) { |
| 4272 | sc.c_encoding = "utf-8"; |
| 4273 | } else if (TYPE(n) == encoding_decl) { |
Martin v. Löwis | 00f1e3f | 2002-08-04 17:29:52 +0000 | [diff] [blame] | 4274 | sc.c_encoding = STR(n); |
| 4275 | n = CHILD(n, 0); |
| 4276 | } else { |
| 4277 | sc.c_encoding = NULL; |
| 4278 | } |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 4279 | if (base) { |
Guido van Rossum | 8ff077b | 1996-08-24 06:21:31 +0000 | [diff] [blame] | 4280 | sc.c_private = base->c_private; |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 4281 | sc.c_symtable = base->c_symtable; |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 4282 | /* c_symtable still points to parent's symbols */ |
| 4283 | if (base->c_nested |
Jeremy Hylton | cb17ae8 | 2001-02-09 22:22:18 +0000 | [diff] [blame] | 4284 | || (sc.c_symtable->st_cur->ste_type == TYPE_FUNCTION)) |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 4285 | sc.c_nested = 1; |
Jeremy Hylton | 93a569d | 2001-10-17 13:22:22 +0000 | [diff] [blame] | 4286 | sc.c_flags |= base->c_flags & PyCF_MASK; |
Martin v. Löwis | 00f1e3f | 2002-08-04 17:29:52 +0000 | [diff] [blame] | 4287 | if (base->c_encoding != NULL) { |
| 4288 | assert(sc.c_encoding == NULL); |
| 4289 | sc.c_encoding = base->c_encoding; |
| 4290 | } |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 4291 | } else { |
Guido van Rossum | 8ff077b | 1996-08-24 06:21:31 +0000 | [diff] [blame] | 4292 | sc.c_private = NULL; |
Jeremy Hylton | 4db62b1 | 2001-02-27 19:07:02 +0000 | [diff] [blame] | 4293 | sc.c_future = PyNode_Future(n, filename); |
Jeremy Hylton | 9f324e9 | 2001-03-01 22:59:14 +0000 | [diff] [blame] | 4294 | if (sc.c_future == NULL) { |
| 4295 | com_free(&sc); |
| 4296 | return NULL; |
| 4297 | } |
Jeremy Hylton | 481081e | 2001-08-14 20:01:59 +0000 | [diff] [blame] | 4298 | if (flags) { |
| 4299 | int merged = sc.c_future->ff_features | |
| 4300 | flags->cf_flags; |
| 4301 | sc.c_future->ff_features = merged; |
| 4302 | flags->cf_flags = merged; |
| 4303 | } |
Jeremy Hylton | 1955fcf | 2003-07-15 20:23:26 +0000 | [diff] [blame] | 4304 | sc.c_symtable = symtable_build(n, sc.c_future, sc.c_filename); |
| 4305 | if (sc.c_symtable == NULL) { |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 4306 | com_free(&sc); |
| 4307 | return NULL; |
| 4308 | } |
Jeremy Hylton | 1955fcf | 2003-07-15 20:23:26 +0000 | [diff] [blame] | 4309 | /* reset symbol table for second pass */ |
| 4310 | sc.c_symtable->st_nscopes = 1; |
| 4311 | sc.c_symtable->st_pass = 2; |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 4312 | } |
| 4313 | co = NULL; |
Jeremy Hylton | cb17ae8 | 2001-02-09 22:22:18 +0000 | [diff] [blame] | 4314 | if (symtable_load_symbols(&sc) < 0) { |
| 4315 | sc.c_errors++; |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 4316 | goto exit; |
Jeremy Hylton | cb17ae8 | 2001-02-09 22:22:18 +0000 | [diff] [blame] | 4317 | } |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 4318 | compile_node(&sc, n); |
| 4319 | com_done(&sc); |
Guido van Rossum | 9bfef44 | 1993-03-29 10:43:31 +0000 | [diff] [blame] | 4320 | if (sc.c_errors == 0) { |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 4321 | PyObject *consts, *names, *varnames, *filename, *name, |
| 4322 | *freevars, *cellvars; |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 4323 | consts = PyList_AsTuple(sc.c_consts); |
| 4324 | names = PyList_AsTuple(sc.c_names); |
| 4325 | varnames = PyList_AsTuple(sc.c_varnames); |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 4326 | cellvars = dict_keys_inorder(sc.c_cellvars, 0); |
| 4327 | freevars = dict_keys_inorder(sc.c_freevars, |
| 4328 | PyTuple_GET_SIZE(cellvars)); |
Guido van Rossum | 7b89b6a | 1997-01-18 08:02:57 +0000 | [diff] [blame] | 4329 | filename = PyString_InternFromString(sc.c_filename); |
| 4330 | name = PyString_InternFromString(sc.c_name); |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 4331 | if (!PyErr_Occurred()) |
| 4332 | co = PyCode_New(sc.c_argcount, |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 4333 | sc.c_nlocals, |
| 4334 | sc.c_maxstacklevel, |
| 4335 | sc.c_flags, |
| 4336 | sc.c_code, |
| 4337 | consts, |
| 4338 | names, |
| 4339 | varnames, |
| 4340 | freevars, |
| 4341 | cellvars, |
| 4342 | filename, |
| 4343 | name, |
| 4344 | sc.c_firstlineno, |
| 4345 | sc.c_lnotab); |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 4346 | Py_XDECREF(consts); |
| 4347 | Py_XDECREF(names); |
| 4348 | Py_XDECREF(varnames); |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 4349 | Py_XDECREF(freevars); |
| 4350 | Py_XDECREF(cellvars); |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 4351 | Py_XDECREF(filename); |
| 4352 | Py_XDECREF(name); |
Guido van Rossum | a082ce4 | 1991-06-04 19:41:56 +0000 | [diff] [blame] | 4353 | } |
Guido van Rossum | 6c2f0c7 | 2000-08-07 19:22:43 +0000 | [diff] [blame] | 4354 | else if (!PyErr_Occurred()) { |
| 4355 | /* This could happen if someone called PyErr_Clear() after an |
| 4356 | error was reported above. That's not supposed to happen, |
| 4357 | but I just plugged one case and I'm not sure there can't be |
| 4358 | others. In that case, raise SystemError so that at least |
| 4359 | it gets reported instead dumping core. */ |
| 4360 | PyErr_SetString(PyExc_SystemError, "lost syntax error"); |
| 4361 | } |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 4362 | exit: |
Jeremy Hylton | 74b3bc4 | 2001-02-23 17:55:27 +0000 | [diff] [blame] | 4363 | if (base == NULL) { |
Jeremy Hylton | 4b38da6 | 2001-02-02 18:19:15 +0000 | [diff] [blame] | 4364 | PySymtable_Free(sc.c_symtable); |
Jeremy Hylton | 74b3bc4 | 2001-02-23 17:55:27 +0000 | [diff] [blame] | 4365 | sc.c_symtable = NULL; |
| 4366 | } |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 4367 | com_free(&sc); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 4368 | return co; |
| 4369 | } |
Guido van Rossum | da4eb5c | 1997-01-24 03:43:35 +0000 | [diff] [blame] | 4370 | |
| 4371 | int |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 4372 | PyCode_Addr2Line(PyCodeObject *co, int addrq) |
Guido van Rossum | da4eb5c | 1997-01-24 03:43:35 +0000 | [diff] [blame] | 4373 | { |
| 4374 | int size = PyString_Size(co->co_lnotab) / 2; |
Guido van Rossum | 2174dcb | 1999-09-15 22:48:09 +0000 | [diff] [blame] | 4375 | unsigned char *p = (unsigned char*)PyString_AsString(co->co_lnotab); |
Guido van Rossum | da4eb5c | 1997-01-24 03:43:35 +0000 | [diff] [blame] | 4376 | int line = co->co_firstlineno; |
| 4377 | int addr = 0; |
| 4378 | while (--size >= 0) { |
| 4379 | addr += *p++; |
| 4380 | if (addr > addrq) |
| 4381 | break; |
| 4382 | line += *p++; |
| 4383 | } |
| 4384 | return line; |
| 4385 | } |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 4386 | |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 4387 | /* The test for LOCAL must come before the test for FREE in order to |
| 4388 | handle classes where name is both local and free. The local var is |
| 4389 | a method and the free var is a free var referenced within a method. |
| 4390 | */ |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 4391 | |
| 4392 | static int |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 4393 | get_ref_type(struct compiling *c, char *name) |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 4394 | { |
Jeremy Hylton | 1abf610 | 2001-08-11 21:51:24 +0000 | [diff] [blame] | 4395 | char buf[350]; |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 4396 | PyObject *v; |
Jeremy Hylton | 5125773 | 2001-03-01 00:42:55 +0000 | [diff] [blame] | 4397 | |
Jeremy Hylton | 1abf610 | 2001-08-11 21:51:24 +0000 | [diff] [blame] | 4398 | if (PyDict_GetItemString(c->c_cellvars, name) != NULL) |
| 4399 | return CELL; |
| 4400 | if (PyDict_GetItemString(c->c_locals, name) != NULL) |
| 4401 | return LOCAL; |
| 4402 | if (PyDict_GetItemString(c->c_freevars, name) != NULL) |
| 4403 | return FREE; |
| 4404 | v = PyDict_GetItemString(c->c_globals, name); |
| 4405 | if (v) { |
| 4406 | if (v == Py_None) |
| 4407 | return GLOBAL_EXPLICIT; |
| 4408 | else { |
| 4409 | return GLOBAL_IMPLICIT; |
| 4410 | } |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 4411 | } |
Marc-André Lemburg | d4c0a9c | 2001-11-28 11:47:00 +0000 | [diff] [blame] | 4412 | PyOS_snprintf(buf, sizeof(buf), |
Jeremy Hylton | 1abf610 | 2001-08-11 21:51:24 +0000 | [diff] [blame] | 4413 | "unknown scope for %.100s in %.100s(%s) " |
| 4414 | "in %s\nsymbols: %s\nlocals: %s\nglobals: %s\n", |
| 4415 | name, c->c_name, |
| 4416 | PyObject_REPR(c->c_symtable->st_cur->ste_id), |
| 4417 | c->c_filename, |
| 4418 | PyObject_REPR(c->c_symtable->st_cur->ste_symbols), |
| 4419 | PyObject_REPR(c->c_locals), |
| 4420 | PyObject_REPR(c->c_globals) |
| 4421 | ); |
| 4422 | |
| 4423 | Py_FatalError(buf); |
| 4424 | return -1; |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 4425 | } |
| 4426 | |
Guido van Rossum | 207fda6 | 2001-03-02 03:30:41 +0000 | [diff] [blame] | 4427 | /* Helper functions to issue warnings */ |
| 4428 | |
| 4429 | static int |
Martin v. Löwis | 95292d6 | 2002-12-11 14:04:59 +0000 | [diff] [blame] | 4430 | issue_warning(const char *msg, const char *filename, int lineno) |
Guido van Rossum | 207fda6 | 2001-03-02 03:30:41 +0000 | [diff] [blame] | 4431 | { |
Jeremy Hylton | 1955fcf | 2003-07-15 20:23:26 +0000 | [diff] [blame] | 4432 | if (PyErr_Occurred()) { |
| 4433 | /* This can happen because symtable_node continues |
| 4434 | processing even after raising a SyntaxError. |
| 4435 | Calling PyErr_WarnExplicit now would clobber the |
| 4436 | pending exception; instead we fail and let that |
| 4437 | exception propagate. |
| 4438 | */ |
| 4439 | return -1; |
| 4440 | } |
Guido van Rossum | 207fda6 | 2001-03-02 03:30:41 +0000 | [diff] [blame] | 4441 | if (PyErr_WarnExplicit(PyExc_SyntaxWarning, msg, filename, |
| 4442 | lineno, NULL, NULL) < 0) { |
| 4443 | if (PyErr_ExceptionMatches(PyExc_SyntaxWarning)) { |
| 4444 | PyErr_SetString(PyExc_SyntaxError, msg); |
| 4445 | PyErr_SyntaxLocation(filename, lineno); |
| 4446 | } |
| 4447 | return -1; |
| 4448 | } |
| 4449 | return 0; |
| 4450 | } |
Guido van Rossum | ee34ac1 | 2001-02-28 22:08:12 +0000 | [diff] [blame] | 4451 | |
Jeremy Hylton | 4419ac1 | 2001-02-28 22:54:51 +0000 | [diff] [blame] | 4452 | static int |
Guido van Rossum | ee34ac1 | 2001-02-28 22:08:12 +0000 | [diff] [blame] | 4453 | symtable_warn(struct symtable *st, char *msg) |
| 4454 | { |
Guido van Rossum | 207fda6 | 2001-03-02 03:30:41 +0000 | [diff] [blame] | 4455 | if (issue_warning(msg, st->st_filename, st->st_cur->ste_lineno) < 0) { |
Guido van Rossum | ee34ac1 | 2001-02-28 22:08:12 +0000 | [diff] [blame] | 4456 | st->st_errors++; |
Jeremy Hylton | 4419ac1 | 2001-02-28 22:54:51 +0000 | [diff] [blame] | 4457 | return -1; |
Guido van Rossum | ee34ac1 | 2001-02-28 22:08:12 +0000 | [diff] [blame] | 4458 | } |
Jeremy Hylton | 4419ac1 | 2001-02-28 22:54:51 +0000 | [diff] [blame] | 4459 | return 0; |
Guido van Rossum | ee34ac1 | 2001-02-28 22:08:12 +0000 | [diff] [blame] | 4460 | } |
| 4461 | |
Jeremy Hylton | 9f1b993 | 2001-02-28 07:07:43 +0000 | [diff] [blame] | 4462 | /* Helper function for setting lineno and filename */ |
| 4463 | |
Jeremy Hylton | 1955fcf | 2003-07-15 20:23:26 +0000 | [diff] [blame] | 4464 | static struct symtable * |
| 4465 | symtable_build(node *n, PyFutureFeatures *ff, const char *filename) |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 4466 | { |
Jeremy Hylton | 1955fcf | 2003-07-15 20:23:26 +0000 | [diff] [blame] | 4467 | struct symtable *st; |
| 4468 | |
| 4469 | st = symtable_init(); |
| 4470 | if (st == NULL) |
| 4471 | return NULL; |
| 4472 | st->st_future = ff; |
| 4473 | st->st_filename = filename; |
| 4474 | symtable_enter_scope(st, TOP, TYPE(n), n->n_lineno); |
| 4475 | if (st->st_errors > 0) |
| 4476 | goto fail; |
| 4477 | symtable_node(st, n); |
| 4478 | if (st->st_errors > 0) |
| 4479 | goto fail; |
| 4480 | return st; |
| 4481 | fail: |
| 4482 | if (!PyErr_Occurred()) { |
| 4483 | /* This could happen because after a syntax error is |
| 4484 | detected, the symbol-table-building continues for |
| 4485 | a while, and PyErr_Clear() might erroneously be |
| 4486 | called during that process. One such case has been |
| 4487 | fixed, but there might be more (now or later). |
| 4488 | */ |
| 4489 | PyErr_SetString(PyExc_SystemError, "lost exception"); |
| 4490 | } |
| 4491 | st->st_future = NULL; |
| 4492 | st->st_filename = NULL; |
| 4493 | PySymtable_Free(st); |
| 4494 | return NULL; |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 4495 | } |
| 4496 | |
| 4497 | static int |
Jeremy Hylton | 29906ee | 2001-02-27 04:23:34 +0000 | [diff] [blame] | 4498 | symtable_init_compiling_symbols(struct compiling *c) |
| 4499 | { |
| 4500 | PyObject *varnames; |
| 4501 | |
| 4502 | varnames = c->c_symtable->st_cur->ste_varnames; |
| 4503 | if (varnames == NULL) { |
| 4504 | varnames = PyList_New(0); |
| 4505 | if (varnames == NULL) |
| 4506 | return -1; |
| 4507 | c->c_symtable->st_cur->ste_varnames = varnames; |
| 4508 | Py_INCREF(varnames); |
| 4509 | } else |
| 4510 | Py_INCREF(varnames); |
| 4511 | c->c_varnames = varnames; |
| 4512 | |
| 4513 | c->c_globals = PyDict_New(); |
| 4514 | if (c->c_globals == NULL) |
| 4515 | return -1; |
| 4516 | c->c_freevars = PyDict_New(); |
| 4517 | if (c->c_freevars == NULL) |
| 4518 | return -1; |
| 4519 | c->c_cellvars = PyDict_New(); |
| 4520 | if (c->c_cellvars == NULL) |
| 4521 | return -1; |
| 4522 | return 0; |
| 4523 | } |
| 4524 | |
| 4525 | struct symbol_info { |
| 4526 | int si_nlocals; |
| 4527 | int si_ncells; |
| 4528 | int si_nfrees; |
| 4529 | int si_nimplicit; |
| 4530 | }; |
| 4531 | |
| 4532 | static void |
| 4533 | symtable_init_info(struct symbol_info *si) |
| 4534 | { |
| 4535 | si->si_nlocals = 0; |
| 4536 | si->si_ncells = 0; |
| 4537 | si->si_nfrees = 0; |
| 4538 | si->si_nimplicit = 0; |
| 4539 | } |
| 4540 | |
| 4541 | static int |
Jeremy Hylton | ddc4fd0 | 2001-04-27 02:29:40 +0000 | [diff] [blame] | 4542 | symtable_resolve_free(struct compiling *c, PyObject *name, int flags, |
Jeremy Hylton | 29906ee | 2001-02-27 04:23:34 +0000 | [diff] [blame] | 4543 | struct symbol_info *si) |
| 4544 | { |
| 4545 | PyObject *dict, *v; |
| 4546 | |
| 4547 | /* Seperate logic for DEF_FREE. If it occurs in a function, |
| 4548 | it indicates a local that we must allocate storage for (a |
| 4549 | cell var). If it occurs in a class, then the class has a |
| 4550 | method and a free variable with the same name. |
| 4551 | */ |
Jeremy Hylton | 29906ee | 2001-02-27 04:23:34 +0000 | [diff] [blame] | 4552 | if (c->c_symtable->st_cur->ste_type == TYPE_FUNCTION) { |
Jeremy Hylton | ddc4fd0 | 2001-04-27 02:29:40 +0000 | [diff] [blame] | 4553 | /* If it isn't declared locally, it can't be a cell. */ |
| 4554 | if (!(flags & (DEF_LOCAL | DEF_PARAM))) |
| 4555 | return 0; |
Jeremy Hylton | 29906ee | 2001-02-27 04:23:34 +0000 | [diff] [blame] | 4556 | v = PyInt_FromLong(si->si_ncells++); |
| 4557 | dict = c->c_cellvars; |
| 4558 | } else { |
Jeremy Hylton | ddc4fd0 | 2001-04-27 02:29:40 +0000 | [diff] [blame] | 4559 | /* If it is free anyway, then there is no need to do |
| 4560 | anything here. |
| 4561 | */ |
| 4562 | if (is_free(flags ^ DEF_FREE_CLASS) |
Jeremy Hylton | 9c90105 | 2001-05-08 04:12:34 +0000 | [diff] [blame] | 4563 | || (flags == DEF_FREE_CLASS)) |
Jeremy Hylton | ddc4fd0 | 2001-04-27 02:29:40 +0000 | [diff] [blame] | 4564 | return 0; |
Jeremy Hylton | 29906ee | 2001-02-27 04:23:34 +0000 | [diff] [blame] | 4565 | v = PyInt_FromLong(si->si_nfrees++); |
| 4566 | dict = c->c_freevars; |
| 4567 | } |
| 4568 | if (v == NULL) |
| 4569 | return -1; |
| 4570 | if (PyDict_SetItem(dict, name, v) < 0) { |
| 4571 | Py_DECREF(v); |
| 4572 | return -1; |
| 4573 | } |
| 4574 | Py_DECREF(v); |
| 4575 | return 0; |
| 4576 | } |
| 4577 | |
Jeremy Hylton | 220ae7c | 2001-03-21 16:43:47 +0000 | [diff] [blame] | 4578 | /* If a variable is a cell and an argument, make sure that appears in |
| 4579 | co_cellvars before any variable to its right in varnames. |
| 4580 | */ |
| 4581 | |
| 4582 | |
| 4583 | static int |
| 4584 | symtable_cellvar_offsets(PyObject **cellvars, int argcount, |
| 4585 | PyObject *varnames, int flags) |
| 4586 | { |
Tim Peters | b39903b | 2003-03-24 17:22:24 +0000 | [diff] [blame] | 4587 | PyObject *v = NULL; |
| 4588 | PyObject *w, *d, *list = NULL; |
Jeremy Hylton | 220ae7c | 2001-03-21 16:43:47 +0000 | [diff] [blame] | 4589 | int i, pos; |
| 4590 | |
| 4591 | if (flags & CO_VARARGS) |
| 4592 | argcount++; |
| 4593 | if (flags & CO_VARKEYWORDS) |
| 4594 | argcount++; |
| 4595 | for (i = argcount; --i >= 0; ) { |
| 4596 | v = PyList_GET_ITEM(varnames, i); |
| 4597 | if (PyDict_GetItem(*cellvars, v)) { |
| 4598 | if (list == NULL) { |
| 4599 | list = PyList_New(1); |
| 4600 | if (list == NULL) |
| 4601 | return -1; |
| 4602 | PyList_SET_ITEM(list, 0, v); |
| 4603 | Py_INCREF(v); |
Martin v. Löwis | cd12bfc | 2003-05-03 10:53:08 +0000 | [diff] [blame] | 4604 | } else { |
| 4605 | if (PyList_Insert(list, 0, v) < 0) { |
| 4606 | Py_DECREF(list); |
| 4607 | return -1; |
| 4608 | } |
| 4609 | } |
Jeremy Hylton | 220ae7c | 2001-03-21 16:43:47 +0000 | [diff] [blame] | 4610 | } |
| 4611 | } |
Jeremy Hylton | 521482d | 2003-05-22 15:47:02 +0000 | [diff] [blame] | 4612 | if (list == NULL) |
| 4613 | return 0; |
| 4614 | |
Jeremy Hylton | 220ae7c | 2001-03-21 16:43:47 +0000 | [diff] [blame] | 4615 | /* There are cellvars that are also arguments. Create a dict |
| 4616 | to replace cellvars and put the args at the front. |
| 4617 | */ |
| 4618 | d = PyDict_New(); |
Martin v. Löwis | cd12bfc | 2003-05-03 10:53:08 +0000 | [diff] [blame] | 4619 | if (d == NULL) |
| 4620 | return -1; |
Jeremy Hylton | 220ae7c | 2001-03-21 16:43:47 +0000 | [diff] [blame] | 4621 | for (i = PyList_GET_SIZE(list); --i >= 0; ) { |
| 4622 | v = PyInt_FromLong(i); |
| 4623 | if (v == NULL) |
| 4624 | goto fail; |
| 4625 | if (PyDict_SetItem(d, PyList_GET_ITEM(list, i), v) < 0) |
| 4626 | goto fail; |
| 4627 | if (PyDict_DelItem(*cellvars, PyList_GET_ITEM(list, i)) < 0) |
| 4628 | goto fail; |
Tim Peters | b39903b | 2003-03-24 17:22:24 +0000 | [diff] [blame] | 4629 | Py_DECREF(v); |
Jeremy Hylton | 220ae7c | 2001-03-21 16:43:47 +0000 | [diff] [blame] | 4630 | } |
| 4631 | pos = 0; |
| 4632 | i = PyList_GET_SIZE(list); |
| 4633 | Py_DECREF(list); |
| 4634 | while (PyDict_Next(*cellvars, &pos, &v, &w)) { |
| 4635 | w = PyInt_FromLong(i++); /* don't care about the old key */ |
Martin v. Löwis | cd12bfc | 2003-05-03 10:53:08 +0000 | [diff] [blame] | 4636 | if (w == NULL) |
| 4637 | goto fail; |
Jeremy Hylton | 220ae7c | 2001-03-21 16:43:47 +0000 | [diff] [blame] | 4638 | if (PyDict_SetItem(d, v, w) < 0) { |
| 4639 | Py_DECREF(w); |
Tim Peters | b39903b | 2003-03-24 17:22:24 +0000 | [diff] [blame] | 4640 | v = NULL; |
Jeremy Hylton | 220ae7c | 2001-03-21 16:43:47 +0000 | [diff] [blame] | 4641 | goto fail; |
| 4642 | } |
| 4643 | Py_DECREF(w); |
| 4644 | } |
| 4645 | Py_DECREF(*cellvars); |
| 4646 | *cellvars = d; |
| 4647 | return 1; |
| 4648 | fail: |
| 4649 | Py_DECREF(d); |
Tim Peters | b39903b | 2003-03-24 17:22:24 +0000 | [diff] [blame] | 4650 | Py_XDECREF(v); |
Jeremy Hylton | 220ae7c | 2001-03-21 16:43:47 +0000 | [diff] [blame] | 4651 | return -1; |
| 4652 | } |
| 4653 | |
Jeremy Hylton | 29906ee | 2001-02-27 04:23:34 +0000 | [diff] [blame] | 4654 | static int |
| 4655 | symtable_freevar_offsets(PyObject *freevars, int offset) |
| 4656 | { |
| 4657 | PyObject *name, *v; |
| 4658 | int pos; |
| 4659 | |
| 4660 | /* The cell vars are the first elements of the closure, |
| 4661 | followed by the free vars. Update the offsets in |
| 4662 | c_freevars to account for number of cellvars. */ |
| 4663 | pos = 0; |
| 4664 | while (PyDict_Next(freevars, &pos, &name, &v)) { |
| 4665 | int i = PyInt_AS_LONG(v) + offset; |
| 4666 | PyObject *o = PyInt_FromLong(i); |
| 4667 | if (o == NULL) |
| 4668 | return -1; |
| 4669 | if (PyDict_SetItem(freevars, name, o) < 0) { |
| 4670 | Py_DECREF(o); |
| 4671 | return -1; |
| 4672 | } |
| 4673 | Py_DECREF(o); |
| 4674 | } |
| 4675 | return 0; |
| 4676 | } |
| 4677 | |
| 4678 | static int |
Jeremy Hylton | 4419ac1 | 2001-02-28 22:54:51 +0000 | [diff] [blame] | 4679 | symtable_check_unoptimized(struct compiling *c, |
| 4680 | PySymtableEntryObject *ste, |
| 4681 | struct symbol_info *si) |
| 4682 | { |
| 4683 | char buf[300]; |
| 4684 | |
| 4685 | if (!(si->si_ncells || si->si_nfrees || ste->ste_child_free |
| 4686 | || (ste->ste_nested && si->si_nimplicit))) |
| 4687 | return 0; |
| 4688 | |
Jeremy Hylton | 280e6bd | 2001-03-22 03:51:05 +0000 | [diff] [blame] | 4689 | #define ILLEGAL_CONTAINS "contains a nested function with free variables" |
| 4690 | |
| 4691 | #define ILLEGAL_IS "is a nested function" |
| 4692 | |
Jeremy Hylton | 4419ac1 | 2001-02-28 22:54:51 +0000 | [diff] [blame] | 4693 | #define ILLEGAL_IMPORT_STAR \ |
Jeremy Hylton | 280e6bd | 2001-03-22 03:51:05 +0000 | [diff] [blame] | 4694 | "import * is not allowed in function '%.100s' because it %s" |
Jeremy Hylton | 4419ac1 | 2001-02-28 22:54:51 +0000 | [diff] [blame] | 4695 | |
| 4696 | #define ILLEGAL_BARE_EXEC \ |
Jeremy Hylton | 280e6bd | 2001-03-22 03:51:05 +0000 | [diff] [blame] | 4697 | "unqualified exec is not allowed in function '%.100s' it %s" |
Jeremy Hylton | 4419ac1 | 2001-02-28 22:54:51 +0000 | [diff] [blame] | 4698 | |
| 4699 | #define ILLEGAL_EXEC_AND_IMPORT_STAR \ |
Neal Norwitz | 150d09d | 2002-01-29 00:56:37 +0000 | [diff] [blame] | 4700 | "function '%.100s' uses import * and bare exec, which are illegal " \ |
Jeremy Hylton | 280e6bd | 2001-03-22 03:51:05 +0000 | [diff] [blame] | 4701 | "because it %s" |
Jeremy Hylton | 4419ac1 | 2001-02-28 22:54:51 +0000 | [diff] [blame] | 4702 | |
| 4703 | /* XXX perhaps the linenos for these opt-breaking statements |
| 4704 | should be stored so the exception can point to them. */ |
| 4705 | |
Jeremy Hylton | 280e6bd | 2001-03-22 03:51:05 +0000 | [diff] [blame] | 4706 | if (ste->ste_child_free) { |
| 4707 | if (ste->ste_optimized == OPT_IMPORT_STAR) |
Barry Warsaw | 8f6d868 | 2001-11-28 21:10:39 +0000 | [diff] [blame] | 4708 | PyOS_snprintf(buf, sizeof(buf), |
| 4709 | ILLEGAL_IMPORT_STAR, |
| 4710 | PyString_AS_STRING(ste->ste_name), |
| 4711 | ILLEGAL_CONTAINS); |
Jeremy Hylton | 280e6bd | 2001-03-22 03:51:05 +0000 | [diff] [blame] | 4712 | else if (ste->ste_optimized == (OPT_BARE_EXEC | OPT_EXEC)) |
Barry Warsaw | 8f6d868 | 2001-11-28 21:10:39 +0000 | [diff] [blame] | 4713 | PyOS_snprintf(buf, sizeof(buf), |
| 4714 | ILLEGAL_BARE_EXEC, |
| 4715 | PyString_AS_STRING(ste->ste_name), |
| 4716 | ILLEGAL_CONTAINS); |
Jeremy Hylton | 280e6bd | 2001-03-22 03:51:05 +0000 | [diff] [blame] | 4717 | else { |
Barry Warsaw | 8f6d868 | 2001-11-28 21:10:39 +0000 | [diff] [blame] | 4718 | PyOS_snprintf(buf, sizeof(buf), |
| 4719 | ILLEGAL_EXEC_AND_IMPORT_STAR, |
| 4720 | PyString_AS_STRING(ste->ste_name), |
| 4721 | ILLEGAL_CONTAINS); |
Jeremy Hylton | 280e6bd | 2001-03-22 03:51:05 +0000 | [diff] [blame] | 4722 | } |
| 4723 | } else { |
| 4724 | if (ste->ste_optimized == OPT_IMPORT_STAR) |
Barry Warsaw | 8f6d868 | 2001-11-28 21:10:39 +0000 | [diff] [blame] | 4725 | PyOS_snprintf(buf, sizeof(buf), |
| 4726 | ILLEGAL_IMPORT_STAR, |
| 4727 | PyString_AS_STRING(ste->ste_name), |
| 4728 | ILLEGAL_IS); |
Jeremy Hylton | 280e6bd | 2001-03-22 03:51:05 +0000 | [diff] [blame] | 4729 | else if (ste->ste_optimized == (OPT_BARE_EXEC | OPT_EXEC)) |
Barry Warsaw | 8f6d868 | 2001-11-28 21:10:39 +0000 | [diff] [blame] | 4730 | PyOS_snprintf(buf, sizeof(buf), |
| 4731 | ILLEGAL_BARE_EXEC, |
| 4732 | PyString_AS_STRING(ste->ste_name), |
| 4733 | ILLEGAL_IS); |
Jeremy Hylton | 280e6bd | 2001-03-22 03:51:05 +0000 | [diff] [blame] | 4734 | else { |
Barry Warsaw | 8f6d868 | 2001-11-28 21:10:39 +0000 | [diff] [blame] | 4735 | PyOS_snprintf(buf, sizeof(buf), |
| 4736 | ILLEGAL_EXEC_AND_IMPORT_STAR, |
| 4737 | PyString_AS_STRING(ste->ste_name), |
| 4738 | ILLEGAL_IS); |
Jeremy Hylton | 280e6bd | 2001-03-22 03:51:05 +0000 | [diff] [blame] | 4739 | } |
Jeremy Hylton | 4419ac1 | 2001-02-28 22:54:51 +0000 | [diff] [blame] | 4740 | } |
Jeremy Hylton | 280e6bd | 2001-03-22 03:51:05 +0000 | [diff] [blame] | 4741 | |
Jeremy Hylton | 1abf610 | 2001-08-11 21:51:24 +0000 | [diff] [blame] | 4742 | PyErr_SetString(PyExc_SyntaxError, buf); |
| 4743 | PyErr_SyntaxLocation(c->c_symtable->st_filename, |
| 4744 | ste->ste_opt_lineno); |
| 4745 | return -1; |
Jeremy Hylton | 4419ac1 | 2001-02-28 22:54:51 +0000 | [diff] [blame] | 4746 | } |
| 4747 | |
| 4748 | static int |
Jeremy Hylton | 29906ee | 2001-02-27 04:23:34 +0000 | [diff] [blame] | 4749 | symtable_update_flags(struct compiling *c, PySymtableEntryObject *ste, |
| 4750 | struct symbol_info *si) |
| 4751 | { |
Jeremy Hylton | b857ba2 | 2001-08-10 21:41:33 +0000 | [diff] [blame] | 4752 | if (c->c_future) |
| 4753 | c->c_flags |= c->c_future->ff_features; |
Tim Peters | 5ca576e | 2001-06-18 22:08:13 +0000 | [diff] [blame] | 4754 | if (ste->ste_generator) |
| 4755 | c->c_flags |= CO_GENERATOR; |
Jeremy Hylton | 29906ee | 2001-02-27 04:23:34 +0000 | [diff] [blame] | 4756 | if (ste->ste_type != TYPE_MODULE) |
| 4757 | c->c_flags |= CO_NEWLOCALS; |
| 4758 | if (ste->ste_type == TYPE_FUNCTION) { |
| 4759 | c->c_nlocals = si->si_nlocals; |
| 4760 | if (ste->ste_optimized == 0) |
| 4761 | c->c_flags |= CO_OPTIMIZED; |
Jeremy Hylton | 4419ac1 | 2001-02-28 22:54:51 +0000 | [diff] [blame] | 4762 | else if (ste->ste_optimized != OPT_EXEC) |
| 4763 | return symtable_check_unoptimized(c, ste, si); |
Jeremy Hylton | 29906ee | 2001-02-27 04:23:34 +0000 | [diff] [blame] | 4764 | } |
| 4765 | return 0; |
| 4766 | } |
| 4767 | |
| 4768 | static int |
Jeremy Hylton | 9832613 | 2003-09-22 04:26:44 +0000 | [diff] [blame] | 4769 | symtable_error(struct symtable *st, int lineno) |
| 4770 | { |
| 4771 | if (lineno == 0) |
| 4772 | lineno = st->st_cur->ste_lineno; |
| 4773 | PyErr_SyntaxLocation(st->st_filename, lineno); |
| 4774 | st->st_errors++; |
| 4775 | return -1; |
| 4776 | } |
| 4777 | |
| 4778 | static int |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 4779 | symtable_load_symbols(struct compiling *c) |
| 4780 | { |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 4781 | struct symtable *st = c->c_symtable; |
Jeremy Hylton | cb17ae8 | 2001-02-09 22:22:18 +0000 | [diff] [blame] | 4782 | PySymtableEntryObject *ste = st->st_cur; |
Jeremy Hylton | 29906ee | 2001-02-27 04:23:34 +0000 | [diff] [blame] | 4783 | PyObject *name, *varnames, *v; |
| 4784 | int i, flags, pos; |
| 4785 | struct symbol_info si; |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 4786 | |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 4787 | v = NULL; |
| 4788 | |
Jeremy Hylton | 29906ee | 2001-02-27 04:23:34 +0000 | [diff] [blame] | 4789 | if (symtable_init_compiling_symbols(c) < 0) |
| 4790 | goto fail; |
| 4791 | symtable_init_info(&si); |
Jeremy Hylton | cb17ae8 | 2001-02-09 22:22:18 +0000 | [diff] [blame] | 4792 | varnames = st->st_cur->ste_varnames; |
Jeremy Hylton | 29906ee | 2001-02-27 04:23:34 +0000 | [diff] [blame] | 4793 | si.si_nlocals = PyList_GET_SIZE(varnames); |
| 4794 | c->c_argcount = si.si_nlocals; |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 4795 | |
Jeremy Hylton | 29906ee | 2001-02-27 04:23:34 +0000 | [diff] [blame] | 4796 | for (i = 0; i < si.si_nlocals; ++i) { |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 4797 | v = PyInt_FromLong(i); |
Martin v. Löwis | cd12bfc | 2003-05-03 10:53:08 +0000 | [diff] [blame] | 4798 | if (v == NULL) |
| 4799 | goto fail; |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 4800 | if (PyDict_SetItem(c->c_locals, |
| 4801 | PyList_GET_ITEM(varnames, i), v) < 0) |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 4802 | goto fail; |
| 4803 | Py_DECREF(v); |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 4804 | } |
| 4805 | |
| 4806 | /* XXX The cases below define the rules for whether a name is |
| 4807 | local or global. The logic could probably be clearer. */ |
| 4808 | pos = 0; |
Jeremy Hylton | cb17ae8 | 2001-02-09 22:22:18 +0000 | [diff] [blame] | 4809 | while (PyDict_Next(ste->ste_symbols, &pos, &name, &v)) { |
| 4810 | flags = PyInt_AS_LONG(v); |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 4811 | |
Jeremy Hylton | cb17ae8 | 2001-02-09 22:22:18 +0000 | [diff] [blame] | 4812 | if (flags & DEF_FREE_GLOBAL) |
Jeremy Hylton | 29906ee | 2001-02-27 04:23:34 +0000 | [diff] [blame] | 4813 | /* undo the original DEF_FREE */ |
| 4814 | flags &= ~(DEF_FREE | DEF_FREE_CLASS); |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 4815 | |
Jeremy Hylton | ce7ef59 | 2001-03-20 00:25:43 +0000 | [diff] [blame] | 4816 | /* Deal with names that need two actions: |
Jeremy Hylton | 1abf610 | 2001-08-11 21:51:24 +0000 | [diff] [blame] | 4817 | 1. Cell variables that are also locals. |
Jeremy Hylton | ce7ef59 | 2001-03-20 00:25:43 +0000 | [diff] [blame] | 4818 | 2. Free variables in methods that are also class |
| 4819 | variables or declared global. |
| 4820 | */ |
Jeremy Hylton | 1abf610 | 2001-08-11 21:51:24 +0000 | [diff] [blame] | 4821 | if (flags & (DEF_FREE | DEF_FREE_CLASS)) |
Jeremy Hylton | ddc4fd0 | 2001-04-27 02:29:40 +0000 | [diff] [blame] | 4822 | symtable_resolve_free(c, name, flags, &si); |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 4823 | |
Jeremy Hylton | cb17ae8 | 2001-02-09 22:22:18 +0000 | [diff] [blame] | 4824 | if (flags & DEF_STAR) { |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 4825 | c->c_argcount--; |
| 4826 | c->c_flags |= CO_VARARGS; |
Jeremy Hylton | cb17ae8 | 2001-02-09 22:22:18 +0000 | [diff] [blame] | 4827 | } else if (flags & DEF_DOUBLESTAR) { |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 4828 | c->c_argcount--; |
| 4829 | c->c_flags |= CO_VARKEYWORDS; |
Jeremy Hylton | cb17ae8 | 2001-02-09 22:22:18 +0000 | [diff] [blame] | 4830 | } else if (flags & DEF_INTUPLE) |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 4831 | c->c_argcount--; |
Jeremy Hylton | cb17ae8 | 2001-02-09 22:22:18 +0000 | [diff] [blame] | 4832 | else if (flags & DEF_GLOBAL) { |
Jeremy Hylton | 29906ee | 2001-02-27 04:23:34 +0000 | [diff] [blame] | 4833 | if (flags & DEF_PARAM) { |
Martin v. Löwis | dd7eb14 | 2003-10-18 22:05:25 +0000 | [diff] [blame] | 4834 | PyErr_Format(PyExc_SyntaxError, PARAM_GLOBAL, |
Jeremy Hylton | 5acc0c0 | 2001-02-02 20:01:10 +0000 | [diff] [blame] | 4835 | PyString_AS_STRING(name)); |
Jeremy Hylton | 9832613 | 2003-09-22 04:26:44 +0000 | [diff] [blame] | 4836 | symtable_error(st, 0); |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 4837 | goto fail; |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 4838 | } |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 4839 | if (PyDict_SetItem(c->c_globals, name, Py_None) < 0) |
| 4840 | goto fail; |
Jeremy Hylton | cb17ae8 | 2001-02-09 22:22:18 +0000 | [diff] [blame] | 4841 | } else if (flags & DEF_FREE_GLOBAL) { |
Jeremy Hylton | 29906ee | 2001-02-27 04:23:34 +0000 | [diff] [blame] | 4842 | si.si_nimplicit++; |
Neal Norwitz | 0698222 | 2002-12-18 01:18:44 +0000 | [diff] [blame] | 4843 | if (PyDict_SetItem(c->c_globals, name, Py_True) < 0) |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 4844 | goto fail; |
Jeremy Hylton | cb17ae8 | 2001-02-09 22:22:18 +0000 | [diff] [blame] | 4845 | } else if ((flags & DEF_LOCAL) && !(flags & DEF_PARAM)) { |
Jeremy Hylton | 29906ee | 2001-02-27 04:23:34 +0000 | [diff] [blame] | 4846 | v = PyInt_FromLong(si.si_nlocals++); |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 4847 | if (v == NULL) |
| 4848 | goto fail; |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 4849 | if (PyDict_SetItem(c->c_locals, name, v) < 0) |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 4850 | goto fail; |
| 4851 | Py_DECREF(v); |
Jeremy Hylton | cb17ae8 | 2001-02-09 22:22:18 +0000 | [diff] [blame] | 4852 | if (ste->ste_type != TYPE_CLASS) |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 4853 | if (PyList_Append(c->c_varnames, name) < 0) |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 4854 | goto fail; |
Jeremy Hylton | cb17ae8 | 2001-02-09 22:22:18 +0000 | [diff] [blame] | 4855 | } else if (is_free(flags)) { |
Jeremy Hylton | 1abf610 | 2001-08-11 21:51:24 +0000 | [diff] [blame] | 4856 | if (ste->ste_nested) { |
Jeremy Hylton | 29906ee | 2001-02-27 04:23:34 +0000 | [diff] [blame] | 4857 | v = PyInt_FromLong(si.si_nfrees++); |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 4858 | if (v == NULL) |
| 4859 | goto fail; |
Jeremy Hylton | cb17ae8 | 2001-02-09 22:22:18 +0000 | [diff] [blame] | 4860 | if (PyDict_SetItem(c->c_freevars, name, v) < 0) |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 4861 | goto fail; |
| 4862 | Py_DECREF(v); |
| 4863 | } else { |
Jeremy Hylton | 29906ee | 2001-02-27 04:23:34 +0000 | [diff] [blame] | 4864 | si.si_nimplicit++; |
Jeremy Hylton | 1abf610 | 2001-08-11 21:51:24 +0000 | [diff] [blame] | 4865 | if (PyDict_SetItem(c->c_globals, name, |
Neal Norwitz | 0698222 | 2002-12-18 01:18:44 +0000 | [diff] [blame] | 4866 | Py_True) < 0) |
Jeremy Hylton | 1abf610 | 2001-08-11 21:51:24 +0000 | [diff] [blame] | 4867 | goto fail; |
| 4868 | if (st->st_nscopes != 1) { |
| 4869 | v = PyInt_FromLong(flags); |
Martin v. Löwis | cd12bfc | 2003-05-03 10:53:08 +0000 | [diff] [blame] | 4870 | if (v == NULL) |
| 4871 | goto fail; |
Jeremy Hylton | 1abf610 | 2001-08-11 21:51:24 +0000 | [diff] [blame] | 4872 | if (PyDict_SetItem(st->st_global, |
| 4873 | name, v)) |
| 4874 | goto fail; |
| 4875 | Py_DECREF(v); |
| 4876 | } |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 4877 | } |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 4878 | } |
| 4879 | } |
| 4880 | |
Jeremy Hylton | ddc4fd0 | 2001-04-27 02:29:40 +0000 | [diff] [blame] | 4881 | assert(PyDict_Size(c->c_freevars) == si.si_nfrees); |
| 4882 | |
Jeremy Hylton | 220ae7c | 2001-03-21 16:43:47 +0000 | [diff] [blame] | 4883 | if (si.si_ncells > 1) { /* one cell is always in order */ |
| 4884 | if (symtable_cellvar_offsets(&c->c_cellvars, c->c_argcount, |
| 4885 | c->c_varnames, c->c_flags) < 0) |
| 4886 | return -1; |
| 4887 | } |
Jeremy Hylton | 29906ee | 2001-02-27 04:23:34 +0000 | [diff] [blame] | 4888 | if (symtable_freevar_offsets(c->c_freevars, si.si_ncells) < 0) |
| 4889 | return -1; |
| 4890 | return symtable_update_flags(c, ste, &si); |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 4891 | fail: |
| 4892 | /* is this always the right thing to do? */ |
| 4893 | Py_XDECREF(v); |
| 4894 | return -1; |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 4895 | } |
| 4896 | |
| 4897 | static struct symtable * |
Jeremy Hylton | cb17ae8 | 2001-02-09 22:22:18 +0000 | [diff] [blame] | 4898 | symtable_init() |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 4899 | { |
| 4900 | struct symtable *st; |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 4901 | |
Andrew MacIntyre | 80d4e2a | 2002-08-04 06:28:21 +0000 | [diff] [blame] | 4902 | st = (struct symtable *)PyObject_MALLOC(sizeof(struct symtable)); |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 4903 | if (st == NULL) |
| 4904 | return NULL; |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 4905 | st->st_pass = 1; |
Tim Peters | ff1f852 | 2001-08-11 01:06:35 +0000 | [diff] [blame] | 4906 | |
Jeremy Hylton | 5acc0c0 | 2001-02-02 20:01:10 +0000 | [diff] [blame] | 4907 | st->st_filename = NULL; |
Martin v. Löwis | cd12bfc | 2003-05-03 10:53:08 +0000 | [diff] [blame] | 4908 | st->st_symbols = NULL; |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 4909 | if ((st->st_stack = PyList_New(0)) == NULL) |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 4910 | goto fail; |
| 4911 | if ((st->st_symbols = PyDict_New()) == NULL) |
| 4912 | goto fail; |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 4913 | st->st_cur = NULL; |
Jeremy Hylton | 4b38da6 | 2001-02-02 18:19:15 +0000 | [diff] [blame] | 4914 | st->st_nscopes = 0; |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 4915 | st->st_errors = 0; |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 4916 | st->st_private = NULL; |
| 4917 | return st; |
| 4918 | fail: |
Jeremy Hylton | 4b38da6 | 2001-02-02 18:19:15 +0000 | [diff] [blame] | 4919 | PySymtable_Free(st); |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 4920 | return NULL; |
| 4921 | } |
| 4922 | |
Jeremy Hylton | 4b38da6 | 2001-02-02 18:19:15 +0000 | [diff] [blame] | 4923 | void |
| 4924 | PySymtable_Free(struct symtable *st) |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 4925 | { |
| 4926 | Py_XDECREF(st->st_symbols); |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 4927 | Py_XDECREF(st->st_stack); |
Jeremy Hylton | 74b3bc4 | 2001-02-23 17:55:27 +0000 | [diff] [blame] | 4928 | Py_XDECREF(st->st_cur); |
Andrew MacIntyre | 80d4e2a | 2002-08-04 06:28:21 +0000 | [diff] [blame] | 4929 | PyObject_FREE((void *)st); |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 4930 | } |
| 4931 | |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 4932 | /* When the compiler exits a scope, it must should update the scope's |
| 4933 | free variable information with the list of free variables in its |
| 4934 | children. |
| 4935 | |
| 4936 | Variables that are free in children and defined in the current |
| 4937 | scope are cellvars. |
| 4938 | |
Jeremy Hylton | cb17ae8 | 2001-02-09 22:22:18 +0000 | [diff] [blame] | 4939 | If the scope being exited is defined at the top-level (ste_nested is |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 4940 | false), free variables in children that are not defined here are |
| 4941 | implicit globals. |
| 4942 | |
| 4943 | */ |
| 4944 | |
| 4945 | static int |
| 4946 | symtable_update_free_vars(struct symtable *st) |
| 4947 | { |
Jeremy Hylton | d7f393e | 2001-02-12 16:01:03 +0000 | [diff] [blame] | 4948 | int i, j, def; |
| 4949 | PyObject *o, *name, *list = NULL; |
Jeremy Hylton | cb17ae8 | 2001-02-09 22:22:18 +0000 | [diff] [blame] | 4950 | PySymtableEntryObject *child, *ste = st->st_cur; |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 4951 | |
Jeremy Hylton | cb17ae8 | 2001-02-09 22:22:18 +0000 | [diff] [blame] | 4952 | if (ste->ste_type == TYPE_CLASS) |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 4953 | def = DEF_FREE_CLASS; |
| 4954 | else |
| 4955 | def = DEF_FREE; |
Jeremy Hylton | cb17ae8 | 2001-02-09 22:22:18 +0000 | [diff] [blame] | 4956 | for (i = 0; i < PyList_GET_SIZE(ste->ste_children); ++i) { |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 4957 | int pos = 0; |
| 4958 | |
Jeremy Hylton | f9415e6 | 2003-05-22 16:22:33 +0000 | [diff] [blame] | 4959 | if (list && PyList_SetSlice(list, 0, |
| 4960 | PyList_GET_SIZE(list), 0) < 0) |
Martin v. Löwis | cd12bfc | 2003-05-03 10:53:08 +0000 | [diff] [blame] | 4961 | return -1; |
Barry Warsaw | 0372af7 | 2001-02-23 18:22:59 +0000 | [diff] [blame] | 4962 | child = (PySymtableEntryObject *) |
Jeremy Hylton | cb17ae8 | 2001-02-09 22:22:18 +0000 | [diff] [blame] | 4963 | PyList_GET_ITEM(ste->ste_children, i); |
| 4964 | while (PyDict_Next(child->ste_symbols, &pos, &name, &o)) { |
Jeremy Hylton | 7889107 | 2001-03-01 06:09:34 +0000 | [diff] [blame] | 4965 | int flags = PyInt_AS_LONG(o); |
| 4966 | if (!(is_free(flags))) |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 4967 | continue; /* avoids indentation */ |
Jeremy Hylton | d7f393e | 2001-02-12 16:01:03 +0000 | [diff] [blame] | 4968 | if (list == NULL) { |
| 4969 | list = PyList_New(0); |
| 4970 | if (list == NULL) |
| 4971 | return -1; |
| 4972 | } |
Jeremy Hylton | cb17ae8 | 2001-02-09 22:22:18 +0000 | [diff] [blame] | 4973 | ste->ste_child_free = 1; |
Jeremy Hylton | d7f393e | 2001-02-12 16:01:03 +0000 | [diff] [blame] | 4974 | if (PyList_Append(list, name) < 0) { |
| 4975 | Py_DECREF(list); |
| 4976 | return -1; |
| 4977 | } |
| 4978 | } |
| 4979 | for (j = 0; list && j < PyList_GET_SIZE(list); j++) { |
Jeremy Hylton | 7889107 | 2001-03-01 06:09:34 +0000 | [diff] [blame] | 4980 | PyObject *v; |
Jeremy Hylton | d7f393e | 2001-02-12 16:01:03 +0000 | [diff] [blame] | 4981 | name = PyList_GET_ITEM(list, j); |
Jeremy Hylton | 7889107 | 2001-03-01 06:09:34 +0000 | [diff] [blame] | 4982 | v = PyDict_GetItem(ste->ste_symbols, name); |
| 4983 | /* If a name N is declared global in scope A and |
| 4984 | referenced in scope B contained (perhaps |
| 4985 | indirectly) in A and there are no scopes |
| 4986 | with bindings for N between B and A, then N |
Jeremy Hylton | 9c90105 | 2001-05-08 04:12:34 +0000 | [diff] [blame] | 4987 | is global in B. Unless A is a class scope, |
| 4988 | because class scopes are not considered for |
| 4989 | nested scopes. |
Jeremy Hylton | 7889107 | 2001-03-01 06:09:34 +0000 | [diff] [blame] | 4990 | */ |
Jeremy Hylton | ce7ef59 | 2001-03-20 00:25:43 +0000 | [diff] [blame] | 4991 | if (v && (ste->ste_type != TYPE_CLASS)) { |
Jeremy Hylton | 7889107 | 2001-03-01 06:09:34 +0000 | [diff] [blame] | 4992 | int flags = PyInt_AS_LONG(v); |
| 4993 | if (flags & DEF_GLOBAL) { |
| 4994 | symtable_undo_free(st, child->ste_id, |
| 4995 | name); |
| 4996 | continue; |
| 4997 | } |
| 4998 | } |
Jeremy Hylton | cb17ae8 | 2001-02-09 22:22:18 +0000 | [diff] [blame] | 4999 | if (ste->ste_nested) { |
| 5000 | if (symtable_add_def_o(st, ste->ste_symbols, |
Jeremy Hylton | d7f393e | 2001-02-12 16:01:03 +0000 | [diff] [blame] | 5001 | name, def) < 0) { |
| 5002 | Py_DECREF(list); |
| 5003 | return -1; |
| 5004 | } |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 5005 | } else { |
Jeremy Hylton | cb17ae8 | 2001-02-09 22:22:18 +0000 | [diff] [blame] | 5006 | if (symtable_check_global(st, child->ste_id, |
Jeremy Hylton | d7f393e | 2001-02-12 16:01:03 +0000 | [diff] [blame] | 5007 | name) < 0) { |
| 5008 | Py_DECREF(list); |
| 5009 | return -1; |
| 5010 | } |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 5011 | } |
| 5012 | } |
| 5013 | } |
Jeremy Hylton | d7f393e | 2001-02-12 16:01:03 +0000 | [diff] [blame] | 5014 | |
| 5015 | Py_XDECREF(list); |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 5016 | return 0; |
| 5017 | } |
| 5018 | |
| 5019 | /* If the current scope is a non-nested class or if name is not |
| 5020 | defined in the current, non-nested scope, then it is an implicit |
| 5021 | global in all nested scopes. |
| 5022 | */ |
| 5023 | |
| 5024 | static int |
| 5025 | symtable_check_global(struct symtable *st, PyObject *child, PyObject *name) |
| 5026 | { |
| 5027 | PyObject *o; |
| 5028 | int v; |
Jeremy Hylton | cb17ae8 | 2001-02-09 22:22:18 +0000 | [diff] [blame] | 5029 | PySymtableEntryObject *ste = st->st_cur; |
Jeremy Hylton | 7889107 | 2001-03-01 06:09:34 +0000 | [diff] [blame] | 5030 | |
Jeremy Hylton | cb17ae8 | 2001-02-09 22:22:18 +0000 | [diff] [blame] | 5031 | if (ste->ste_type == TYPE_CLASS) |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 5032 | return symtable_undo_free(st, child, name); |
Jeremy Hylton | cb17ae8 | 2001-02-09 22:22:18 +0000 | [diff] [blame] | 5033 | o = PyDict_GetItem(ste->ste_symbols, name); |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 5034 | if (o == NULL) |
| 5035 | return symtable_undo_free(st, child, name); |
| 5036 | v = PyInt_AS_LONG(o); |
Jeremy Hylton | 7889107 | 2001-03-01 06:09:34 +0000 | [diff] [blame] | 5037 | |
Jeremy Hylton | eab156f | 2001-01-30 01:24:43 +0000 | [diff] [blame] | 5038 | if (is_free(v) || (v & DEF_GLOBAL)) |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 5039 | return symtable_undo_free(st, child, name); |
| 5040 | else |
Jeremy Hylton | cb17ae8 | 2001-02-09 22:22:18 +0000 | [diff] [blame] | 5041 | return symtable_add_def_o(st, ste->ste_symbols, |
| 5042 | name, DEF_FREE); |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 5043 | } |
| 5044 | |
| 5045 | static int |
| 5046 | symtable_undo_free(struct symtable *st, PyObject *id, |
| 5047 | PyObject *name) |
| 5048 | { |
| 5049 | int i, v, x; |
Jeremy Hylton | cb17ae8 | 2001-02-09 22:22:18 +0000 | [diff] [blame] | 5050 | PyObject *info; |
| 5051 | PySymtableEntryObject *ste; |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 5052 | |
Jeremy Hylton | cb17ae8 | 2001-02-09 22:22:18 +0000 | [diff] [blame] | 5053 | ste = (PySymtableEntryObject *)PyDict_GetItem(st->st_symbols, id); |
| 5054 | if (ste == NULL) |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 5055 | return -1; |
Jeremy Hylton | 7889107 | 2001-03-01 06:09:34 +0000 | [diff] [blame] | 5056 | |
Jeremy Hylton | cb17ae8 | 2001-02-09 22:22:18 +0000 | [diff] [blame] | 5057 | info = PyDict_GetItem(ste->ste_symbols, name); |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 5058 | if (info == NULL) |
| 5059 | return 0; |
| 5060 | v = PyInt_AS_LONG(info); |
| 5061 | if (is_free(v)) { |
Jeremy Hylton | cb17ae8 | 2001-02-09 22:22:18 +0000 | [diff] [blame] | 5062 | if (symtable_add_def_o(st, ste->ste_symbols, name, |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 5063 | DEF_FREE_GLOBAL) < 0) |
| 5064 | return -1; |
| 5065 | } else |
| 5066 | /* If the name is defined here or declared global, |
| 5067 | then the recursion stops. */ |
| 5068 | return 0; |
| 5069 | |
Jeremy Hylton | cb17ae8 | 2001-02-09 22:22:18 +0000 | [diff] [blame] | 5070 | for (i = 0; i < PyList_GET_SIZE(ste->ste_children); ++i) { |
| 5071 | PySymtableEntryObject *child; |
Barry Warsaw | 0372af7 | 2001-02-23 18:22:59 +0000 | [diff] [blame] | 5072 | child = (PySymtableEntryObject *) |
Jeremy Hylton | cb17ae8 | 2001-02-09 22:22:18 +0000 | [diff] [blame] | 5073 | PyList_GET_ITEM(ste->ste_children, i); |
| 5074 | x = symtable_undo_free(st, child->ste_id, name); |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 5075 | if (x < 0) |
| 5076 | return x; |
| 5077 | } |
| 5078 | return 0; |
| 5079 | } |
| 5080 | |
Jeremy Hylton | 29906ee | 2001-02-27 04:23:34 +0000 | [diff] [blame] | 5081 | /* symtable_enter_scope() gets a reference via PySymtableEntry_New(). |
| 5082 | This reference is released when the scope is exited, via the DECREF |
| 5083 | in symtable_exit_scope(). |
| 5084 | */ |
| 5085 | |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 5086 | static int |
| 5087 | symtable_exit_scope(struct symtable *st) |
| 5088 | { |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 5089 | int end; |
| 5090 | |
Jeremy Hylton | 4419ac1 | 2001-02-28 22:54:51 +0000 | [diff] [blame] | 5091 | if (st->st_pass == 1) |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 5092 | symtable_update_free_vars(st); |
Jeremy Hylton | cb17ae8 | 2001-02-09 22:22:18 +0000 | [diff] [blame] | 5093 | Py_DECREF(st->st_cur); |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 5094 | end = PyList_GET_SIZE(st->st_stack) - 1; |
Jeremy Hylton | cb17ae8 | 2001-02-09 22:22:18 +0000 | [diff] [blame] | 5095 | st->st_cur = (PySymtableEntryObject *)PyList_GET_ITEM(st->st_stack, |
| 5096 | end); |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 5097 | if (PySequence_DelItem(st->st_stack, end) < 0) |
| 5098 | return -1; |
Jeremy Hylton | cb17ae8 | 2001-02-09 22:22:18 +0000 | [diff] [blame] | 5099 | return 0; |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 5100 | } |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 5101 | |
Jeremy Hylton | 4b38da6 | 2001-02-02 18:19:15 +0000 | [diff] [blame] | 5102 | static void |
| 5103 | symtable_enter_scope(struct symtable *st, char *name, int type, |
| 5104 | int lineno) |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 5105 | { |
Jeremy Hylton | cb17ae8 | 2001-02-09 22:22:18 +0000 | [diff] [blame] | 5106 | PySymtableEntryObject *prev = NULL; |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 5107 | |
| 5108 | if (st->st_cur) { |
Jeremy Hylton | cb17ae8 | 2001-02-09 22:22:18 +0000 | [diff] [blame] | 5109 | prev = st->st_cur; |
| 5110 | if (PyList_Append(st->st_stack, (PyObject *)st->st_cur) < 0) { |
Jeremy Hylton | 4b38da6 | 2001-02-02 18:19:15 +0000 | [diff] [blame] | 5111 | st->st_errors++; |
| 5112 | return; |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 5113 | } |
| 5114 | } |
Barry Warsaw | 0372af7 | 2001-02-23 18:22:59 +0000 | [diff] [blame] | 5115 | st->st_cur = (PySymtableEntryObject *) |
Jeremy Hylton | cb17ae8 | 2001-02-09 22:22:18 +0000 | [diff] [blame] | 5116 | PySymtableEntry_New(st, name, type, lineno); |
Martin v. Löwis | cd12bfc | 2003-05-03 10:53:08 +0000 | [diff] [blame] | 5117 | if (st->st_cur == NULL) { |
| 5118 | st->st_errors++; |
| 5119 | return; |
| 5120 | } |
Jeremy Hylton | cb17ae8 | 2001-02-09 22:22:18 +0000 | [diff] [blame] | 5121 | if (strcmp(name, TOP) == 0) |
| 5122 | st->st_global = st->st_cur->ste_symbols; |
Jeremy Hylton | 74b3bc4 | 2001-02-23 17:55:27 +0000 | [diff] [blame] | 5123 | if (prev && st->st_pass == 1) { |
Jeremy Hylton | cb17ae8 | 2001-02-09 22:22:18 +0000 | [diff] [blame] | 5124 | if (PyList_Append(prev->ste_children, |
| 5125 | (PyObject *)st->st_cur) < 0) |
| 5126 | st->st_errors++; |
Jeremy Hylton | 74b3bc4 | 2001-02-23 17:55:27 +0000 | [diff] [blame] | 5127 | } |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 5128 | } |
| 5129 | |
| 5130 | static int |
Jeremy Hylton | 29906ee | 2001-02-27 04:23:34 +0000 | [diff] [blame] | 5131 | symtable_lookup(struct symtable *st, char *name) |
| 5132 | { |
| 5133 | char buffer[MANGLE_LEN]; |
| 5134 | PyObject *v; |
| 5135 | int flags; |
| 5136 | |
Raymond Hettinger | 0ae0c07 | 2002-06-20 22:23:15 +0000 | [diff] [blame] | 5137 | if (_Py_Mangle(st->st_private, name, buffer, sizeof(buffer))) |
Jeremy Hylton | 29906ee | 2001-02-27 04:23:34 +0000 | [diff] [blame] | 5138 | name = buffer; |
| 5139 | v = PyDict_GetItemString(st->st_cur->ste_symbols, name); |
| 5140 | if (v == NULL) { |
| 5141 | if (PyErr_Occurred()) |
| 5142 | return -1; |
| 5143 | else |
| 5144 | return 0; |
| 5145 | } |
| 5146 | |
| 5147 | flags = PyInt_AS_LONG(v); |
| 5148 | return flags; |
| 5149 | } |
| 5150 | |
| 5151 | static int |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 5152 | symtable_add_def(struct symtable *st, char *name, int flag) |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 5153 | { |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 5154 | PyObject *s; |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 5155 | char buffer[MANGLE_LEN]; |
Jeremy Hylton | 39e2f3f | 2001-02-28 01:58:08 +0000 | [diff] [blame] | 5156 | int ret; |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 5157 | |
Guido van Rossum | b716462 | 2002-08-16 02:48:11 +0000 | [diff] [blame] | 5158 | /* Warn about None, except inside a tuple (where the assignment |
| 5159 | code already issues a warning). */ |
| 5160 | if ((flag & DEF_PARAM) && !(flag & DEF_INTUPLE) && |
| 5161 | *name == 'N' && strcmp(name, "None") == 0) |
| 5162 | { |
| 5163 | if (symtable_warn(st, "argument named None")) |
| 5164 | return -1; |
| 5165 | } |
Raymond Hettinger | 0ae0c07 | 2002-06-20 22:23:15 +0000 | [diff] [blame] | 5166 | if (_Py_Mangle(st->st_private, name, buffer, sizeof(buffer))) |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 5167 | name = buffer; |
| 5168 | if ((s = PyString_InternFromString(name)) == NULL) |
| 5169 | return -1; |
Jeremy Hylton | 39e2f3f | 2001-02-28 01:58:08 +0000 | [diff] [blame] | 5170 | ret = symtable_add_def_o(st, st->st_cur->ste_symbols, s, flag); |
| 5171 | Py_DECREF(s); |
| 5172 | return ret; |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 5173 | } |
| 5174 | |
| 5175 | /* Must only be called with mangled names */ |
| 5176 | |
| 5177 | static int |
| 5178 | symtable_add_def_o(struct symtable *st, PyObject *dict, |
| 5179 | PyObject *name, int flag) |
| 5180 | { |
| 5181 | PyObject *o; |
| 5182 | int val; |
| 5183 | |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 5184 | if ((o = PyDict_GetItem(dict, name))) { |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 5185 | val = PyInt_AS_LONG(o); |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 5186 | if ((flag & DEF_PARAM) && (val & DEF_PARAM)) { |
Jeremy Hylton | eab156f | 2001-01-30 01:24:43 +0000 | [diff] [blame] | 5187 | PyErr_Format(PyExc_SyntaxError, DUPLICATE_ARGUMENT, |
Jeremy Hylton | 483638c | 2001-02-01 20:20:45 +0000 | [diff] [blame] | 5188 | PyString_AsString(name)); |
Jeremy Hylton | 9832613 | 2003-09-22 04:26:44 +0000 | [diff] [blame] | 5189 | return symtable_error(st, 0); |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 5190 | } |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 5191 | val |= flag; |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 5192 | } else |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 5193 | val = flag; |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 5194 | o = PyInt_FromLong(val); |
Martin v. Löwis | cd12bfc | 2003-05-03 10:53:08 +0000 | [diff] [blame] | 5195 | if (o == NULL) |
| 5196 | return -1; |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 5197 | if (PyDict_SetItem(dict, name, o) < 0) { |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 5198 | Py_DECREF(o); |
| 5199 | return -1; |
| 5200 | } |
| 5201 | Py_DECREF(o); |
| 5202 | |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 5203 | if (flag & DEF_PARAM) { |
Jeremy Hylton | cb17ae8 | 2001-02-09 22:22:18 +0000 | [diff] [blame] | 5204 | if (PyList_Append(st->st_cur->ste_varnames, name) < 0) |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 5205 | return -1; |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 5206 | } else if (flag & DEF_GLOBAL) { |
| 5207 | /* XXX need to update DEF_GLOBAL for other flags too; |
| 5208 | perhaps only DEF_FREE_GLOBAL */ |
| 5209 | if ((o = PyDict_GetItem(st->st_global, name))) { |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 5210 | val = PyInt_AS_LONG(o); |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 5211 | val |= flag; |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 5212 | } else |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 5213 | val = flag; |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 5214 | o = PyInt_FromLong(val); |
Martin v. Löwis | cd12bfc | 2003-05-03 10:53:08 +0000 | [diff] [blame] | 5215 | if (o == NULL) |
| 5216 | return -1; |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 5217 | if (PyDict_SetItem(st->st_global, name, o) < 0) { |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 5218 | Py_DECREF(o); |
| 5219 | return -1; |
| 5220 | } |
| 5221 | Py_DECREF(o); |
| 5222 | } |
| 5223 | return 0; |
| 5224 | } |
| 5225 | |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 5226 | #define symtable_add_use(ST, NAME) symtable_add_def((ST), (NAME), USE) |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 5227 | |
Tim Peters | 08a898f | 2001-06-28 01:52:22 +0000 | [diff] [blame] | 5228 | /* Look for a yield stmt under n. Return 1 if found, else 0. |
| 5229 | This hack is used to look inside "if 0:" blocks (which are normally |
| 5230 | ignored) in case those are the only places a yield occurs (so that this |
| 5231 | function is a generator). */ |
Tim Peters | b6c3cea | 2001-06-26 03:36:28 +0000 | [diff] [blame] | 5232 | static int |
| 5233 | look_for_yield(node *n) |
| 5234 | { |
| 5235 | int i; |
| 5236 | |
| 5237 | for (i = 0; i < NCH(n); ++i) { |
| 5238 | node *kid = CHILD(n, i); |
| 5239 | |
| 5240 | switch (TYPE(kid)) { |
| 5241 | |
| 5242 | case classdef: |
| 5243 | case funcdef: |
Tim Peters | 08a898f | 2001-06-28 01:52:22 +0000 | [diff] [blame] | 5244 | case lambdef: |
Tim Peters | b6c3cea | 2001-06-26 03:36:28 +0000 | [diff] [blame] | 5245 | /* Stuff in nested functions and classes can't make |
| 5246 | the parent a generator. */ |
| 5247 | return 0; |
| 5248 | |
| 5249 | case yield_stmt: |
| 5250 | return 1; |
| 5251 | |
| 5252 | default: |
| 5253 | if (look_for_yield(kid)) |
| 5254 | return 1; |
| 5255 | } |
| 5256 | } |
| 5257 | return 0; |
| 5258 | } |
| 5259 | |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 5260 | static void |
| 5261 | symtable_node(struct symtable *st, node *n) |
| 5262 | { |
Jeremy Hylton | 961dfe0 | 2001-10-18 16:15:10 +0000 | [diff] [blame] | 5263 | int i; |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 5264 | |
| 5265 | loop: |
| 5266 | switch (TYPE(n)) { |
| 5267 | case funcdef: { |
| 5268 | char *func_name = STR(CHILD(n, 1)); |
| 5269 | symtable_add_def(st, func_name, DEF_LOCAL); |
| 5270 | symtable_default_args(st, CHILD(n, 2)); |
Jeremy Hylton | 4b38da6 | 2001-02-02 18:19:15 +0000 | [diff] [blame] | 5271 | symtable_enter_scope(st, func_name, TYPE(n), n->n_lineno); |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 5272 | symtable_funcdef(st, n); |
| 5273 | symtable_exit_scope(st); |
| 5274 | break; |
| 5275 | } |
| 5276 | case lambdef: |
| 5277 | if (NCH(n) == 4) |
| 5278 | symtable_default_args(st, CHILD(n, 1)); |
Jeremy Hylton | 4b38da6 | 2001-02-02 18:19:15 +0000 | [diff] [blame] | 5279 | symtable_enter_scope(st, "lambda", TYPE(n), n->n_lineno); |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 5280 | symtable_funcdef(st, n); |
| 5281 | symtable_exit_scope(st); |
| 5282 | break; |
| 5283 | case classdef: { |
| 5284 | char *tmp, *class_name = STR(CHILD(n, 1)); |
| 5285 | symtable_add_def(st, class_name, DEF_LOCAL); |
| 5286 | if (TYPE(CHILD(n, 2)) == LPAR) { |
| 5287 | node *bases = CHILD(n, 3); |
| 5288 | int i; |
| 5289 | for (i = 0; i < NCH(bases); i += 2) { |
| 5290 | symtable_node(st, CHILD(bases, i)); |
| 5291 | } |
| 5292 | } |
Jeremy Hylton | 4b38da6 | 2001-02-02 18:19:15 +0000 | [diff] [blame] | 5293 | symtable_enter_scope(st, class_name, TYPE(n), n->n_lineno); |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 5294 | tmp = st->st_private; |
| 5295 | st->st_private = class_name; |
| 5296 | symtable_node(st, CHILD(n, NCH(n) - 1)); |
| 5297 | st->st_private = tmp; |
| 5298 | symtable_exit_scope(st); |
| 5299 | break; |
| 5300 | } |
| 5301 | case if_stmt: |
| 5302 | for (i = 0; i + 3 < NCH(n); i += 4) { |
Tim Peters | b6c3cea | 2001-06-26 03:36:28 +0000 | [diff] [blame] | 5303 | if (is_constant_false(NULL, (CHILD(n, i + 1)))) { |
| 5304 | if (st->st_cur->ste_generator == 0) |
| 5305 | st->st_cur->ste_generator = |
| 5306 | look_for_yield(CHILD(n, i+3)); |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 5307 | continue; |
Tim Peters | b6c3cea | 2001-06-26 03:36:28 +0000 | [diff] [blame] | 5308 | } |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 5309 | symtable_node(st, CHILD(n, i + 1)); |
| 5310 | symtable_node(st, CHILD(n, i + 3)); |
| 5311 | } |
| 5312 | if (i + 2 < NCH(n)) |
| 5313 | symtable_node(st, CHILD(n, i + 2)); |
| 5314 | break; |
| 5315 | case global_stmt: |
| 5316 | symtable_global(st, n); |
| 5317 | break; |
| 5318 | case import_stmt: |
| 5319 | symtable_import(st, n); |
| 5320 | break; |
Jeremy Hylton | 483638c | 2001-02-01 20:20:45 +0000 | [diff] [blame] | 5321 | case exec_stmt: { |
Jeremy Hylton | 29906ee | 2001-02-27 04:23:34 +0000 | [diff] [blame] | 5322 | st->st_cur->ste_optimized |= OPT_EXEC; |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 5323 | symtable_node(st, CHILD(n, 1)); |
| 5324 | if (NCH(n) > 2) |
| 5325 | symtable_node(st, CHILD(n, 3)); |
Jeremy Hylton | 2e2cded | 2001-03-22 03:57:58 +0000 | [diff] [blame] | 5326 | else { |
Jeremy Hylton | 29906ee | 2001-02-27 04:23:34 +0000 | [diff] [blame] | 5327 | st->st_cur->ste_optimized |= OPT_BARE_EXEC; |
Jeremy Hylton | 2e2cded | 2001-03-22 03:57:58 +0000 | [diff] [blame] | 5328 | st->st_cur->ste_opt_lineno = n->n_lineno; |
| 5329 | } |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 5330 | if (NCH(n) > 4) |
| 5331 | symtable_node(st, CHILD(n, 5)); |
| 5332 | break; |
Jeremy Hylton | 483638c | 2001-02-01 20:20:45 +0000 | [diff] [blame] | 5333 | |
| 5334 | } |
Jeremy Hylton | 384639f | 2001-02-19 15:50:51 +0000 | [diff] [blame] | 5335 | case assert_stmt: |
| 5336 | if (Py_OptimizeFlag) |
| 5337 | return; |
| 5338 | if (NCH(n) == 2) { |
| 5339 | n = CHILD(n, 1); |
| 5340 | goto loop; |
| 5341 | } else { |
| 5342 | symtable_node(st, CHILD(n, 1)); |
| 5343 | n = CHILD(n, 3); |
| 5344 | goto loop; |
| 5345 | } |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 5346 | case except_clause: |
| 5347 | if (NCH(n) == 4) |
Jeremy Hylton | eab156f | 2001-01-30 01:24:43 +0000 | [diff] [blame] | 5348 | symtable_assign(st, CHILD(n, 3), 0); |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 5349 | if (NCH(n) > 1) { |
| 5350 | n = CHILD(n, 1); |
| 5351 | goto loop; |
| 5352 | } |
| 5353 | break; |
| 5354 | case del_stmt: |
Jeremy Hylton | eab156f | 2001-01-30 01:24:43 +0000 | [diff] [blame] | 5355 | symtable_assign(st, CHILD(n, 1), 0); |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 5356 | break; |
Tim Peters | 5ca576e | 2001-06-18 22:08:13 +0000 | [diff] [blame] | 5357 | case yield_stmt: |
| 5358 | st->st_cur->ste_generator = 1; |
| 5359 | n = CHILD(n, 1); |
| 5360 | goto loop; |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 5361 | case expr_stmt: |
| 5362 | if (NCH(n) == 1) |
| 5363 | n = CHILD(n, 0); |
| 5364 | else { |
| 5365 | if (TYPE(CHILD(n, 1)) == augassign) { |
Jeremy Hylton | eab156f | 2001-01-30 01:24:43 +0000 | [diff] [blame] | 5366 | symtable_assign(st, CHILD(n, 0), 0); |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 5367 | symtable_node(st, CHILD(n, 2)); |
| 5368 | break; |
| 5369 | } else { |
| 5370 | int i; |
| 5371 | for (i = 0; i < NCH(n) - 2; i += 2) |
Jeremy Hylton | eab156f | 2001-01-30 01:24:43 +0000 | [diff] [blame] | 5372 | symtable_assign(st, CHILD(n, i), 0); |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 5373 | n = CHILD(n, NCH(n) - 1); |
| 5374 | } |
| 5375 | } |
| 5376 | goto loop; |
Jeremy Hylton | 961dfe0 | 2001-10-18 16:15:10 +0000 | [diff] [blame] | 5377 | case list_iter: |
Jeremy Hylton | 4d508ad | 2003-05-21 17:34:50 +0000 | [diff] [blame] | 5378 | /* only occurs when there are multiple for loops |
| 5379 | in a list comprehension */ |
Jeremy Hylton | 961dfe0 | 2001-10-18 16:15:10 +0000 | [diff] [blame] | 5380 | n = CHILD(n, 0); |
Jeremy Hylton | 4d508ad | 2003-05-21 17:34:50 +0000 | [diff] [blame] | 5381 | if (TYPE(n) == list_for) |
| 5382 | symtable_list_for(st, n); |
| 5383 | else { |
Jeremy Hylton | 961dfe0 | 2001-10-18 16:15:10 +0000 | [diff] [blame] | 5384 | REQ(n, list_if); |
| 5385 | symtable_node(st, CHILD(n, 1)); |
| 5386 | if (NCH(n) == 3) { |
| 5387 | n = CHILD(n, 2); |
| 5388 | goto loop; |
| 5389 | } |
| 5390 | } |
| 5391 | break; |
| 5392 | case for_stmt: |
| 5393 | symtable_assign(st, CHILD(n, 1), 0); |
| 5394 | for (i = 3; i < NCH(n); ++i) |
| 5395 | if (TYPE(CHILD(n, i)) >= single_input) |
| 5396 | symtable_node(st, CHILD(n, i)); |
| 5397 | break; |
| 5398 | /* The remaining cases fall through to default except in |
| 5399 | special circumstances. This requires the individual cases |
| 5400 | to be coded with great care, even though they look like |
| 5401 | rather innocuous. Each case must double-check TYPE(n). |
| 5402 | */ |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 5403 | case argument: |
Jeremy Hylton | 961dfe0 | 2001-10-18 16:15:10 +0000 | [diff] [blame] | 5404 | if (TYPE(n) == argument && NCH(n) == 3) { |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 5405 | n = CHILD(n, 2); |
| 5406 | goto loop; |
| 5407 | } |
Jeremy Hylton | 961dfe0 | 2001-10-18 16:15:10 +0000 | [diff] [blame] | 5408 | /* fall through */ |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 5409 | case listmaker: |
| 5410 | if (NCH(n) > 1 && TYPE(CHILD(n, 1)) == list_for) { |
Jeremy Hylton | 4d508ad | 2003-05-21 17:34:50 +0000 | [diff] [blame] | 5411 | symtable_list_comprehension(st, n); |
Jeremy Hylton | 961dfe0 | 2001-10-18 16:15:10 +0000 | [diff] [blame] | 5412 | break; |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 5413 | } |
Jeremy Hylton | 961dfe0 | 2001-10-18 16:15:10 +0000 | [diff] [blame] | 5414 | /* fall through */ |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 5415 | case atom: |
| 5416 | if (TYPE(n) == atom && TYPE(CHILD(n, 0)) == NAME) { |
| 5417 | symtable_add_use(st, STR(CHILD(n, 0))); |
| 5418 | break; |
| 5419 | } |
Jeremy Hylton | 961dfe0 | 2001-10-18 16:15:10 +0000 | [diff] [blame] | 5420 | /* fall through */ |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 5421 | default: |
Jeremy Hylton | 961dfe0 | 2001-10-18 16:15:10 +0000 | [diff] [blame] | 5422 | /* Walk over every non-token child with a special case |
| 5423 | for one child. |
| 5424 | */ |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 5425 | if (NCH(n) == 1) { |
| 5426 | n = CHILD(n, 0); |
| 5427 | goto loop; |
| 5428 | } |
Jeremy Hylton | 961dfe0 | 2001-10-18 16:15:10 +0000 | [diff] [blame] | 5429 | for (i = 0; i < NCH(n); ++i) |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 5430 | if (TYPE(CHILD(n, i)) >= single_input) |
| 5431 | symtable_node(st, CHILD(n, i)); |
| 5432 | } |
| 5433 | } |
| 5434 | |
| 5435 | static void |
| 5436 | symtable_funcdef(struct symtable *st, node *n) |
| 5437 | { |
| 5438 | node *body; |
| 5439 | |
| 5440 | if (TYPE(n) == lambdef) { |
| 5441 | if (NCH(n) == 4) |
| 5442 | symtable_params(st, CHILD(n, 1)); |
| 5443 | } else |
| 5444 | symtable_params(st, CHILD(n, 2)); |
| 5445 | body = CHILD(n, NCH(n) - 1); |
| 5446 | symtable_node(st, body); |
| 5447 | } |
| 5448 | |
| 5449 | /* The next two functions parse the argument tuple. |
Guido van Rossum | b716462 | 2002-08-16 02:48:11 +0000 | [diff] [blame] | 5450 | symtable_default_args() checks for names in the default arguments, |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 5451 | which are references in the defining scope. symtable_params() |
| 5452 | parses the parameter names, which are defined in the function's |
| 5453 | body. |
| 5454 | |
| 5455 | varargslist: |
| 5456 | (fpdef ['=' test] ',')* ('*' NAME [',' '**' NAME] | '**' NAME) |
| 5457 | | fpdef ['=' test] (',' fpdef ['=' test])* [','] |
| 5458 | */ |
| 5459 | |
| 5460 | static void |
| 5461 | symtable_default_args(struct symtable *st, node *n) |
| 5462 | { |
| 5463 | node *c; |
| 5464 | int i; |
| 5465 | |
| 5466 | if (TYPE(n) == parameters) { |
| 5467 | n = CHILD(n, 1); |
| 5468 | if (TYPE(n) == RPAR) |
| 5469 | return; |
| 5470 | } |
| 5471 | REQ(n, varargslist); |
| 5472 | for (i = 0; i < NCH(n); i += 2) { |
| 5473 | c = CHILD(n, i); |
| 5474 | if (TYPE(c) == STAR || TYPE(c) == DOUBLESTAR) { |
| 5475 | break; |
| 5476 | } |
| 5477 | if (i > 0 && (TYPE(CHILD(n, i - 1)) == EQUAL)) |
| 5478 | symtable_node(st, CHILD(n, i)); |
| 5479 | } |
| 5480 | } |
| 5481 | |
| 5482 | static void |
| 5483 | symtable_params(struct symtable *st, node *n) |
| 5484 | { |
Jeremy Hylton | a6ebc48 | 2001-01-25 17:01:49 +0000 | [diff] [blame] | 5485 | int i, complex = -1, ext = 0; |
Guido van Rossum | 633d90c | 2002-12-23 16:51:42 +0000 | [diff] [blame] | 5486 | node *c = NULL; |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 5487 | |
| 5488 | if (TYPE(n) == parameters) { |
| 5489 | n = CHILD(n, 1); |
| 5490 | if (TYPE(n) == RPAR) |
| 5491 | return; |
| 5492 | } |
| 5493 | REQ(n, varargslist); |
| 5494 | for (i = 0; i < NCH(n); i += 2) { |
| 5495 | c = CHILD(n, i); |
| 5496 | if (TYPE(c) == STAR || TYPE(c) == DOUBLESTAR) { |
| 5497 | ext = 1; |
| 5498 | break; |
| 5499 | } |
| 5500 | if (TYPE(c) == test) { |
| 5501 | continue; |
| 5502 | } |
Guido van Rossum | 633d90c | 2002-12-23 16:51:42 +0000 | [diff] [blame] | 5503 | if (TYPE(CHILD(c, 0)) == NAME) |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 5504 | symtable_add_def(st, STR(CHILD(c, 0)), DEF_PARAM); |
Guido van Rossum | 633d90c | 2002-12-23 16:51:42 +0000 | [diff] [blame] | 5505 | else { |
Barry Warsaw | 8f6d868 | 2001-11-28 21:10:39 +0000 | [diff] [blame] | 5506 | char nbuf[30]; |
| 5507 | PyOS_snprintf(nbuf, sizeof(nbuf), ".%d", i); |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 5508 | symtable_add_def(st, nbuf, DEF_PARAM); |
Jeremy Hylton | a6ebc48 | 2001-01-25 17:01:49 +0000 | [diff] [blame] | 5509 | complex = i; |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 5510 | } |
| 5511 | } |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 5512 | if (ext) { |
| 5513 | c = CHILD(n, i); |
| 5514 | if (TYPE(c) == STAR) { |
| 5515 | i++; |
| 5516 | symtable_add_def(st, STR(CHILD(n, i)), |
| 5517 | DEF_PARAM | DEF_STAR); |
| 5518 | i += 2; |
Jeremy Hylton | 1113cfc | 2001-01-23 00:50:52 +0000 | [diff] [blame] | 5519 | if (i >= NCH(n)) |
Jeremy Hylton | a6ebc48 | 2001-01-25 17:01:49 +0000 | [diff] [blame] | 5520 | c = NULL; |
| 5521 | else |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 5522 | c = CHILD(n, i); |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 5523 | } |
Jeremy Hylton | a6ebc48 | 2001-01-25 17:01:49 +0000 | [diff] [blame] | 5524 | if (c && TYPE(c) == DOUBLESTAR) { |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 5525 | i++; |
| 5526 | symtable_add_def(st, STR(CHILD(n, i)), |
| 5527 | DEF_PARAM | DEF_DOUBLESTAR); |
| 5528 | } |
| 5529 | } |
Jeremy Hylton | a6ebc48 | 2001-01-25 17:01:49 +0000 | [diff] [blame] | 5530 | if (complex >= 0) { |
| 5531 | int j; |
| 5532 | for (j = 0; j <= complex; j++) { |
| 5533 | c = CHILD(n, j); |
| 5534 | if (TYPE(c) == COMMA) |
Jeremy Hylton | 2b3f0ca | 2001-02-19 23:52:49 +0000 | [diff] [blame] | 5535 | c = CHILD(n, ++j); |
| 5536 | else if (TYPE(c) == EQUAL) |
| 5537 | c = CHILD(n, j += 3); |
Jeremy Hylton | a6ebc48 | 2001-01-25 17:01:49 +0000 | [diff] [blame] | 5538 | if (TYPE(CHILD(c, 0)) == LPAR) |
| 5539 | symtable_params_fplist(st, CHILD(c, 1)); |
| 5540 | } |
| 5541 | } |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 5542 | } |
| 5543 | |
| 5544 | static void |
| 5545 | symtable_params_fplist(struct symtable *st, node *n) |
| 5546 | { |
| 5547 | int i; |
| 5548 | node *c; |
| 5549 | |
| 5550 | REQ(n, fplist); |
| 5551 | for (i = 0; i < NCH(n); i += 2) { |
| 5552 | c = CHILD(n, i); |
| 5553 | REQ(c, fpdef); |
| 5554 | if (NCH(c) == 1) |
| 5555 | symtable_add_def(st, STR(CHILD(c, 0)), |
| 5556 | DEF_PARAM | DEF_INTUPLE); |
| 5557 | else |
| 5558 | symtable_params_fplist(st, CHILD(c, 1)); |
| 5559 | } |
| 5560 | |
| 5561 | } |
| 5562 | |
| 5563 | static void |
| 5564 | symtable_global(struct symtable *st, node *n) |
| 5565 | { |
| 5566 | int i; |
| 5567 | |
Jeremy Hylton | 9f324e9 | 2001-03-01 22:59:14 +0000 | [diff] [blame] | 5568 | /* XXX It might be helpful to warn about module-level global |
| 5569 | statements, but it's hard to tell the difference between |
| 5570 | module-level and a string passed to exec. |
| 5571 | */ |
Jeremy Hylton | c176132 | 2001-02-28 23:44:45 +0000 | [diff] [blame] | 5572 | |
Jeremy Hylton | 29906ee | 2001-02-27 04:23:34 +0000 | [diff] [blame] | 5573 | for (i = 1; i < NCH(n); i += 2) { |
| 5574 | char *name = STR(CHILD(n, i)); |
Jeremy Hylton | be77cf7 | 2001-02-27 05:15:57 +0000 | [diff] [blame] | 5575 | int flags; |
| 5576 | |
| 5577 | flags = symtable_lookup(st, name); |
Jeremy Hylton | 39e2f3f | 2001-02-28 01:58:08 +0000 | [diff] [blame] | 5578 | if (flags < 0) |
| 5579 | continue; |
Jeremy Hylton | be77cf7 | 2001-02-27 05:15:57 +0000 | [diff] [blame] | 5580 | if (flags && flags != DEF_GLOBAL) { |
| 5581 | char buf[500]; |
| 5582 | if (flags & DEF_PARAM) { |
Martin v. Löwis | dd7eb14 | 2003-10-18 22:05:25 +0000 | [diff] [blame] | 5583 | PyErr_Format(PyExc_SyntaxError, PARAM_GLOBAL, |
Jeremy Hylton | 39e2f3f | 2001-02-28 01:58:08 +0000 | [diff] [blame] | 5584 | name); |
Jeremy Hylton | 9832613 | 2003-09-22 04:26:44 +0000 | [diff] [blame] | 5585 | symtable_error(st, 0); |
Jeremy Hylton | be77cf7 | 2001-02-27 05:15:57 +0000 | [diff] [blame] | 5586 | return; |
Guido van Rossum | 0bba7f8 | 2001-02-28 21:55:38 +0000 | [diff] [blame] | 5587 | } |
| 5588 | else { |
| 5589 | if (flags & DEF_LOCAL) |
Barry Warsaw | 8f6d868 | 2001-11-28 21:10:39 +0000 | [diff] [blame] | 5590 | PyOS_snprintf(buf, sizeof(buf), |
| 5591 | GLOBAL_AFTER_ASSIGN, |
| 5592 | name); |
Guido van Rossum | 0bba7f8 | 2001-02-28 21:55:38 +0000 | [diff] [blame] | 5593 | else |
Barry Warsaw | 8f6d868 | 2001-11-28 21:10:39 +0000 | [diff] [blame] | 5594 | PyOS_snprintf(buf, sizeof(buf), |
| 5595 | GLOBAL_AFTER_USE, name); |
Guido van Rossum | ee34ac1 | 2001-02-28 22:08:12 +0000 | [diff] [blame] | 5596 | symtable_warn(st, buf); |
Jeremy Hylton | be77cf7 | 2001-02-27 05:15:57 +0000 | [diff] [blame] | 5597 | } |
| 5598 | } |
Jeremy Hylton | 29906ee | 2001-02-27 04:23:34 +0000 | [diff] [blame] | 5599 | symtable_add_def(st, name, DEF_GLOBAL); |
| 5600 | } |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 5601 | } |
| 5602 | |
| 5603 | static void |
| 5604 | symtable_list_comprehension(struct symtable *st, node *n) |
| 5605 | { |
Jeremy Hylton | 4d508ad | 2003-05-21 17:34:50 +0000 | [diff] [blame] | 5606 | /* listmaker: test list_for */ |
Barry Warsaw | 8f6d868 | 2001-11-28 21:10:39 +0000 | [diff] [blame] | 5607 | char tmpname[30]; |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 5608 | |
Jeremy Hylton | 4d508ad | 2003-05-21 17:34:50 +0000 | [diff] [blame] | 5609 | REQ(n, listmaker); |
| 5610 | PyOS_snprintf(tmpname, sizeof(tmpname), "_[%d]", |
| 5611 | ++st->st_cur->ste_tmpname); |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 5612 | symtable_add_def(st, tmpname, DEF_LOCAL); |
Jeremy Hylton | 4d508ad | 2003-05-21 17:34:50 +0000 | [diff] [blame] | 5613 | symtable_list_for(st, CHILD(n, 1)); |
| 5614 | symtable_node(st, CHILD(n, 0)); |
| 5615 | --st->st_cur->ste_tmpname; |
| 5616 | } |
| 5617 | |
| 5618 | static void |
| 5619 | symtable_list_for(struct symtable *st, node *n) |
| 5620 | { |
| 5621 | REQ(n, list_for); |
| 5622 | /* list_for: for v in expr [list_iter] */ |
Jeremy Hylton | eab156f | 2001-01-30 01:24:43 +0000 | [diff] [blame] | 5623 | symtable_assign(st, CHILD(n, 1), 0); |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 5624 | symtable_node(st, CHILD(n, 3)); |
| 5625 | if (NCH(n) == 5) |
| 5626 | symtable_node(st, CHILD(n, 4)); |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 5627 | } |
| 5628 | |
| 5629 | static void |
| 5630 | symtable_import(struct symtable *st, node *n) |
| 5631 | { |
| 5632 | int i; |
Jeremy Hylton | 483638c | 2001-02-01 20:20:45 +0000 | [diff] [blame] | 5633 | /* import_stmt: 'import' dotted_as_name (',' dotted_as_name)* |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 5634 | | 'from' dotted_name 'import' |
| 5635 | ('*' | import_as_name (',' import_as_name)*) |
Jeremy Hylton | 483638c | 2001-02-01 20:20:45 +0000 | [diff] [blame] | 5636 | import_as_name: NAME [NAME NAME] |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 5637 | */ |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 5638 | if (STR(CHILD(n, 0))[0] == 'f') { /* from */ |
Jeremy Hylton | 39e2f3f | 2001-02-28 01:58:08 +0000 | [diff] [blame] | 5639 | node *dotname = CHILD(n, 1); |
| 5640 | if (strcmp(STR(CHILD(dotname, 0)), "__future__") == 0) { |
| 5641 | /* check for bogus imports */ |
| 5642 | if (n->n_lineno >= st->st_future->ff_last_lineno) { |
| 5643 | PyErr_SetString(PyExc_SyntaxError, |
| 5644 | LATE_FUTURE); |
Jeremy Hylton | 9832613 | 2003-09-22 04:26:44 +0000 | [diff] [blame] | 5645 | symtable_error(st, n->n_lineno); |
Jeremy Hylton | 39e2f3f | 2001-02-28 01:58:08 +0000 | [diff] [blame] | 5646 | return; |
| 5647 | } |
| 5648 | } |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 5649 | if (TYPE(CHILD(n, 3)) == STAR) { |
Jeremy Hylton | 8a6f295 | 2001-08-06 19:45:40 +0000 | [diff] [blame] | 5650 | if (st->st_cur->ste_type != TYPE_MODULE) { |
Jeremy Hylton | 6a53bd8 | 2001-08-06 20:34:25 +0000 | [diff] [blame] | 5651 | if (symtable_warn(st, |
| 5652 | "import * only allowed at module level") < 0) |
| 5653 | return; |
Jeremy Hylton | 8a6f295 | 2001-08-06 19:45:40 +0000 | [diff] [blame] | 5654 | } |
Jeremy Hylton | 29906ee | 2001-02-27 04:23:34 +0000 | [diff] [blame] | 5655 | st->st_cur->ste_optimized |= OPT_IMPORT_STAR; |
Jeremy Hylton | 2e2cded | 2001-03-22 03:57:58 +0000 | [diff] [blame] | 5656 | st->st_cur->ste_opt_lineno = n->n_lineno; |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 5657 | } else { |
| 5658 | for (i = 3; i < NCH(n); i += 2) { |
| 5659 | node *c = CHILD(n, i); |
| 5660 | if (NCH(c) > 1) /* import as */ |
Jeremy Hylton | eab156f | 2001-01-30 01:24:43 +0000 | [diff] [blame] | 5661 | symtable_assign(st, CHILD(c, 2), |
| 5662 | DEF_IMPORT); |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 5663 | else |
Jeremy Hylton | eab156f | 2001-01-30 01:24:43 +0000 | [diff] [blame] | 5664 | symtable_assign(st, CHILD(c, 0), |
| 5665 | DEF_IMPORT); |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 5666 | } |
| 5667 | } |
Jeremy Hylton | 29906ee | 2001-02-27 04:23:34 +0000 | [diff] [blame] | 5668 | } else { |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 5669 | for (i = 1; i < NCH(n); i += 2) { |
Jeremy Hylton | eab156f | 2001-01-30 01:24:43 +0000 | [diff] [blame] | 5670 | symtable_assign(st, CHILD(n, i), DEF_IMPORT); |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 5671 | } |
| 5672 | } |
| 5673 | } |
| 5674 | |
Jeremy Hylton | 961dfe0 | 2001-10-18 16:15:10 +0000 | [diff] [blame] | 5675 | /* The third argument to symatble_assign() is a flag to be passed to |
| 5676 | symtable_add_def() if it is eventually called. The flag is useful |
| 5677 | to specify the particular type of assignment that should be |
| 5678 | recorded, e.g. an assignment caused by import. |
| 5679 | */ |
| 5680 | |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 5681 | static void |
Jeremy Hylton | 961dfe0 | 2001-10-18 16:15:10 +0000 | [diff] [blame] | 5682 | symtable_assign(struct symtable *st, node *n, int def_flag) |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 5683 | { |
| 5684 | node *tmp; |
| 5685 | int i; |
| 5686 | |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 5687 | loop: |
| 5688 | switch (TYPE(n)) { |
| 5689 | case lambdef: |
Jeremy Hylton | eab156f | 2001-01-30 01:24:43 +0000 | [diff] [blame] | 5690 | /* invalid assignment, e.g. lambda x:x=2. The next |
| 5691 | pass will catch this error. */ |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 5692 | return; |
| 5693 | case power: |
| 5694 | if (NCH(n) > 2) { |
| 5695 | for (i = 2; i < NCH(n); ++i) |
| 5696 | if (TYPE(CHILD(n, i)) != DOUBLESTAR) |
| 5697 | symtable_node(st, CHILD(n, i)); |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 5698 | } |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 5699 | if (NCH(n) > 1) { |
| 5700 | symtable_node(st, CHILD(n, 0)); |
| 5701 | symtable_node(st, CHILD(n, 1)); |
| 5702 | } else { |
| 5703 | n = CHILD(n, 0); |
| 5704 | goto loop; |
| 5705 | } |
| 5706 | return; |
| 5707 | case listmaker: |
Jeremy Hylton | 23b4227 | 2001-03-19 20:38:06 +0000 | [diff] [blame] | 5708 | if (NCH(n) > 1 && TYPE(CHILD(n, 1)) == list_for) { |
| 5709 | /* XXX This is an error, but the next pass |
| 5710 | will catch it. */ |
| 5711 | return; |
| 5712 | } else { |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 5713 | for (i = 0; i < NCH(n); i += 2) |
Jeremy Hylton | 961dfe0 | 2001-10-18 16:15:10 +0000 | [diff] [blame] | 5714 | symtable_assign(st, CHILD(n, i), def_flag); |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 5715 | } |
| 5716 | return; |
| 5717 | case exprlist: |
| 5718 | case testlist: |
Guido van Rossum | 2d3b986 | 2002-05-24 15:47:06 +0000 | [diff] [blame] | 5719 | case testlist1: |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 5720 | if (NCH(n) == 1) { |
| 5721 | n = CHILD(n, 0); |
| 5722 | goto loop; |
| 5723 | } |
| 5724 | else { |
| 5725 | int i; |
| 5726 | for (i = 0; i < NCH(n); i += 2) |
Jeremy Hylton | 961dfe0 | 2001-10-18 16:15:10 +0000 | [diff] [blame] | 5727 | symtable_assign(st, CHILD(n, i), def_flag); |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 5728 | return; |
| 5729 | } |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 5730 | case atom: |
| 5731 | tmp = CHILD(n, 0); |
| 5732 | if (TYPE(tmp) == LPAR || TYPE(tmp) == LSQB) { |
| 5733 | n = CHILD(n, 1); |
| 5734 | goto loop; |
Jeremy Hylton | 897b821 | 2001-03-23 14:08:38 +0000 | [diff] [blame] | 5735 | } else if (TYPE(tmp) == NAME) { |
Jeremy Hylton | 778e265 | 2001-11-09 19:50:08 +0000 | [diff] [blame] | 5736 | if (strcmp(STR(tmp), "__debug__") == 0) { |
| 5737 | PyErr_SetString(PyExc_SyntaxError, |
| 5738 | ASSIGN_DEBUG); |
Jeremy Hylton | 9832613 | 2003-09-22 04:26:44 +0000 | [diff] [blame] | 5739 | symtable_error(st, n->n_lineno); |
| 5740 | return; |
Jeremy Hylton | 778e265 | 2001-11-09 19:50:08 +0000 | [diff] [blame] | 5741 | } |
Jeremy Hylton | 961dfe0 | 2001-10-18 16:15:10 +0000 | [diff] [blame] | 5742 | symtable_add_def(st, STR(tmp), DEF_LOCAL | def_flag); |
Jeremy Hylton | 897b821 | 2001-03-23 14:08:38 +0000 | [diff] [blame] | 5743 | } |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 5744 | return; |
| 5745 | case dotted_as_name: |
| 5746 | if (NCH(n) == 3) |
| 5747 | symtable_add_def(st, STR(CHILD(n, 2)), |
Jeremy Hylton | 961dfe0 | 2001-10-18 16:15:10 +0000 | [diff] [blame] | 5748 | DEF_LOCAL | def_flag); |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 5749 | else |
| 5750 | symtable_add_def(st, |
| 5751 | STR(CHILD(CHILD(n, |
| 5752 | 0), 0)), |
Jeremy Hylton | 961dfe0 | 2001-10-18 16:15:10 +0000 | [diff] [blame] | 5753 | DEF_LOCAL | def_flag); |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 5754 | return; |
| 5755 | case dotted_name: |
Jeremy Hylton | 961dfe0 | 2001-10-18 16:15:10 +0000 | [diff] [blame] | 5756 | symtable_add_def(st, STR(CHILD(n, 0)), DEF_LOCAL | def_flag); |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 5757 | return; |
| 5758 | case NAME: |
Jeremy Hylton | 961dfe0 | 2001-10-18 16:15:10 +0000 | [diff] [blame] | 5759 | symtable_add_def(st, STR(n), DEF_LOCAL | def_flag); |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 5760 | return; |
| 5761 | default: |
| 5762 | if (NCH(n) == 0) |
| 5763 | return; |
Jeremy Hylton | 17820c4 | 2001-02-19 15:33:10 +0000 | [diff] [blame] | 5764 | if (NCH(n) == 1) { |
| 5765 | n = CHILD(n, 0); |
| 5766 | goto loop; |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 5767 | } |
Jeremy Hylton | 17820c4 | 2001-02-19 15:33:10 +0000 | [diff] [blame] | 5768 | /* Should only occur for errors like x + 1 = 1, |
| 5769 | which will be caught in the next pass. */ |
| 5770 | for (i = 0; i < NCH(n); ++i) |
| 5771 | if (TYPE(CHILD(n, i)) >= single_input) |
Jeremy Hylton | 961dfe0 | 2001-10-18 16:15:10 +0000 | [diff] [blame] | 5772 | symtable_assign(st, CHILD(n, i), def_flag); |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 5773 | } |
| 5774 | } |