Jeremy Hylton | fa974a9 | 2000-03-06 18:50:48 +0000 | [diff] [blame] | 1 | """Parse tree transformation module. |
| 2 | |
| 3 | Transforms Python source code into an abstract syntax tree (AST) |
| 4 | defined in the ast module. |
| 5 | |
| 6 | The simplest ways to invoke this module are via parse and parseFile. |
| 7 | parse(buf) -> AST |
| 8 | parseFile(path) -> AST |
| 9 | """ |
| 10 | |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 11 | # Original version written by Greg Stein (gstein@lyra.org) |
| 12 | # and Bill Tutt (rassilon@lima.mudlib.org) |
| 13 | # February 1997. |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 14 | # |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 15 | # Modifications and improvements for Python 2.0 by Jeremy Hylton and |
| 16 | # Mark Hammond |
| 17 | |
| 18 | # Portions of this file are: |
| 19 | # Copyright (C) 1997-1998 Greg Stein. All Rights Reserved. |
| 20 | # |
| 21 | # This module is provided under a BSD-ish license. See |
| 22 | # http://www.opensource.org/licenses/bsd-license.html |
| 23 | # and replace OWNER, ORGANIZATION, and YEAR as appropriate. |
| 24 | |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 25 | from ast import * |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 26 | import parser |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 27 | # Care must be taken to use only symbols and tokens defined in Python |
| 28 | # 1.5.2 for code branches executed in 1.5.2 |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 29 | import symbol |
| 30 | import token |
| 31 | import string |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 32 | import sys |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 33 | |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 34 | error = 'walker.error' |
| 35 | |
Jeremy Hylton | 9605c11 | 2000-02-08 18:57:32 +0000 | [diff] [blame] | 36 | from consts import CO_VARARGS, CO_VARKEYWORDS |
| 37 | from consts import OP_ASSIGN, OP_DELETE, OP_APPLY |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 38 | |
Jeremy Hylton | fa974a9 | 2000-03-06 18:50:48 +0000 | [diff] [blame] | 39 | def parseFile(path): |
| 40 | f = open(path) |
| 41 | src = f.read() |
| 42 | f.close() |
| 43 | return parse(src) |
| 44 | |
| 45 | def parse(buf): |
| 46 | return Transformer().parsesuite(buf) |
| 47 | |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 48 | def asList(nodes): |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 49 | l = [] |
| 50 | for item in nodes: |
| 51 | if hasattr(item, "asList"): |
| 52 | l.append(item.asList()) |
| 53 | else: |
| 54 | if type(item) is type( (None, None) ): |
| 55 | l.append(tuple(asList(item))) |
| 56 | elif type(item) is type( [] ): |
| 57 | l.append(asList(item)) |
| 58 | else: |
| 59 | l.append(item) |
| 60 | return l |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 61 | |
| 62 | def Node(*args): |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 63 | kind = args[0] |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 64 | if nodes.has_key(kind): |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 65 | try: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 66 | return apply(nodes[kind], args[1:]) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 67 | except TypeError: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 68 | print nodes[kind], len(args), args |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 69 | raise |
| 70 | else: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 71 | raise error, "Can't find appropriate Node type: %s" % str(args) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 72 | #return apply(ast.Node, args) |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 73 | |
| 74 | class Transformer: |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 75 | """Utility object for transforming Python parse trees. |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 76 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 77 | Exposes the following methods: |
| 78 | tree = transform(ast_tree) |
| 79 | tree = parsesuite(text) |
| 80 | tree = parseexpr(text) |
| 81 | tree = parsefile(fileob | filename) |
| 82 | """ |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 83 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 84 | def __init__(self): |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 85 | self._dispatch = {} |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 86 | for value, name in symbol.sym_name.items(): |
| 87 | if hasattr(self, name): |
| 88 | self._dispatch[value] = getattr(self, name) |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 89 | self._dispatch[token.NEWLINE] = self.com_NEWLINE |
| 90 | self._atom_dispatch = {token.LPAR: self.atom_lpar, |
| 91 | token.LSQB: self.atom_lsqb, |
| 92 | token.LBRACE: self.atom_lbrace, |
| 93 | token.BACKQUOTE: self.atom_backquote, |
| 94 | token.NUMBER: self.atom_number, |
| 95 | token.STRING: self.atom_string, |
| 96 | token.NAME: self.atom_name, |
| 97 | } |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 98 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 99 | def transform(self, tree): |
| 100 | """Transform an AST into a modified parse tree.""" |
| 101 | if type(tree) != type(()) and type(tree) != type([]): |
| 102 | tree = parser.ast2tuple(tree,1) |
| 103 | return self.compile_node(tree) |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 104 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 105 | def parsesuite(self, text): |
| 106 | """Return a modified parse tree for the given suite text.""" |
| 107 | # Hack for handling non-native line endings on non-DOS like OSs. |
| 108 | text = string.replace(text, '\x0d', '') |
| 109 | return self.transform(parser.suite(text)) |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 110 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 111 | def parseexpr(self, text): |
| 112 | """Return a modified parse tree for the given expression text.""" |
| 113 | return self.transform(parser.expr(text)) |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 114 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 115 | def parsefile(self, file): |
| 116 | """Return a modified parse tree for the contents of the given file.""" |
| 117 | if type(file) == type(''): |
| 118 | file = open(file) |
| 119 | return self.parsesuite(file.read()) |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 120 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 121 | # -------------------------------------------------------------- |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 122 | # |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 123 | # PRIVATE METHODS |
| 124 | # |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 125 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 126 | def compile_node(self, node): |
| 127 | ### emit a line-number node? |
| 128 | n = node[0] |
| 129 | if n == symbol.single_input: |
| 130 | return self.single_input(node[1:]) |
| 131 | if n == symbol.file_input: |
| 132 | return self.file_input(node[1:]) |
| 133 | if n == symbol.eval_input: |
| 134 | return self.eval_input(node[1:]) |
| 135 | if n == symbol.lambdef: |
| 136 | return self.lambdef(node[1:]) |
| 137 | if n == symbol.funcdef: |
| 138 | return self.funcdef(node[1:]) |
| 139 | if n == symbol.classdef: |
| 140 | return self.classdef(node[1:]) |
| 141 | |
| 142 | raise error, ('unexpected node type', n) |
| 143 | |
| 144 | def single_input(self, node): |
| 145 | ### do we want to do anything about being "interactive" ? |
| 146 | |
| 147 | # NEWLINE | simple_stmt | compound_stmt NEWLINE |
| 148 | n = node[0][0] |
| 149 | if n != token.NEWLINE: |
| 150 | return self.com_stmt(node[0]) |
| 151 | |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 152 | return Pass() |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 153 | |
| 154 | def file_input(self, nodelist): |
| 155 | doc = self.get_docstring(nodelist, symbol.file_input) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 156 | stmts = [] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 157 | for node in nodelist: |
| 158 | if node[0] != token.ENDMARKER and node[0] != token.NEWLINE: |
| 159 | self.com_append_stmt(stmts, node) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 160 | return Module(doc, Stmt(stmts)) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 161 | |
| 162 | def eval_input(self, nodelist): |
| 163 | # from the built-in function input() |
| 164 | ### is this sufficient? |
| 165 | return self.com_node(nodelist[0]) |
| 166 | |
| 167 | def funcdef(self, nodelist): |
| 168 | # funcdef: 'def' NAME parameters ':' suite |
| 169 | # parameters: '(' [varargslist] ')' |
| 170 | |
| 171 | lineno = nodelist[1][2] |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 172 | name = nodelist[1][1] |
| 173 | args = nodelist[2][2] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 174 | |
| 175 | if args[0] == symbol.varargslist: |
| 176 | names, defaults, flags = self.com_arglist(args[1:]) |
| 177 | else: |
| 178 | names = defaults = () |
| 179 | flags = 0 |
| 180 | doc = self.get_docstring(nodelist[4]) |
| 181 | |
| 182 | # code for function |
| 183 | code = self.com_node(nodelist[4]) |
| 184 | |
Jeremy Hylton | a59ac0a | 2000-11-06 03:33:52 +0000 | [diff] [blame] | 185 | if doc is not None: |
| 186 | assert isinstance(code, Stmt) |
| 187 | assert isinstance(code.nodes[0], Discard) |
| 188 | del code.nodes[0] |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 189 | n = Function(name, names, defaults, flags, doc, code) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 190 | n.lineno = lineno |
| 191 | return n |
| 192 | |
| 193 | def lambdef(self, nodelist): |
| 194 | # lambdef: 'lambda' [varargslist] ':' test |
| 195 | if nodelist[2][0] == symbol.varargslist: |
| 196 | names, defaults, flags = self.com_arglist(nodelist[2][1:]) |
| 197 | else: |
| 198 | names = defaults = () |
| 199 | flags = 0 |
| 200 | |
| 201 | # code for lambda |
| 202 | code = self.com_node(nodelist[-1]) |
| 203 | |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 204 | n = Lambda(names, defaults, flags, code) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 205 | n.lineno = nodelist[1][2] |
| 206 | return n |
| 207 | |
| 208 | def classdef(self, nodelist): |
| 209 | # classdef: 'class' NAME ['(' testlist ')'] ':' suite |
| 210 | |
| 211 | name = nodelist[1][1] |
| 212 | doc = self.get_docstring(nodelist[-1]) |
| 213 | if nodelist[2][0] == token.COLON: |
| 214 | bases = [] |
| 215 | else: |
| 216 | bases = self.com_bases(nodelist[3]) |
| 217 | |
| 218 | # code for class |
| 219 | code = self.com_node(nodelist[-1]) |
| 220 | |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 221 | n = Class(name, bases, doc, code) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 222 | n.lineno = nodelist[1][2] |
| 223 | return n |
| 224 | |
| 225 | def stmt(self, nodelist): |
| 226 | return self.com_stmt(nodelist[0]) |
| 227 | |
| 228 | small_stmt = stmt |
| 229 | flow_stmt = stmt |
| 230 | compound_stmt = stmt |
| 231 | |
| 232 | def simple_stmt(self, nodelist): |
| 233 | # small_stmt (';' small_stmt)* [';'] NEWLINE |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 234 | stmts = [] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 235 | for i in range(0, len(nodelist), 2): |
| 236 | self.com_append_stmt(stmts, nodelist[i]) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 237 | return Stmt(stmts) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 238 | |
| 239 | def parameters(self, nodelist): |
| 240 | raise error |
| 241 | |
| 242 | def varargslist(self, nodelist): |
| 243 | raise error |
| 244 | |
| 245 | def fpdef(self, nodelist): |
| 246 | raise error |
| 247 | |
| 248 | def fplist(self, nodelist): |
| 249 | raise error |
| 250 | |
| 251 | def dotted_name(self, nodelist): |
| 252 | raise error |
| 253 | |
| 254 | def comp_op(self, nodelist): |
| 255 | raise error |
| 256 | |
| 257 | def trailer(self, nodelist): |
| 258 | raise error |
| 259 | |
| 260 | def sliceop(self, nodelist): |
| 261 | raise error |
| 262 | |
| 263 | def argument(self, nodelist): |
| 264 | raise error |
| 265 | |
| 266 | # -------------------------------------------------------------- |
| 267 | # |
| 268 | # STATEMENT NODES (invoked by com_node()) |
| 269 | # |
| 270 | |
| 271 | def expr_stmt(self, nodelist): |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 272 | # augassign testlist | testlist ('=' testlist)* |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 273 | exprNode = self.com_node(nodelist[-1]) |
| 274 | if len(nodelist) == 1: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 275 | return Discard(exprNode) |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 276 | if nodelist[1][0] == token.EQUAL: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 277 | nodes = [] |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 278 | for i in range(0, len(nodelist) - 2, 2): |
| 279 | nodes.append(self.com_assign(nodelist[i], OP_ASSIGN)) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 280 | n = Assign(nodes, exprNode) |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 281 | n.lineno = nodelist[1][2] |
| 282 | else: |
| 283 | lval = self.com_augassign(nodelist[0]) |
| 284 | op = self.com_augassign_op(nodelist[1]) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 285 | n = AugAssign(lval, op[1], exprNode) |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 286 | n.lineno = op[2] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 287 | return n |
| 288 | |
| 289 | def print_stmt(self, nodelist): |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 290 | # print ([ test (',' test)* [','] ] | '>>' test [ (',' test)+ [','] ]) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 291 | items = [] |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 292 | if len(nodelist) == 1: |
| 293 | start = 1 |
| 294 | dest = None |
| 295 | elif nodelist[1][0] == token.RIGHTSHIFT: |
| 296 | assert len(nodelist) == 3 \ |
| 297 | or nodelist[3][0] == token.COMMA |
| 298 | dest = self.com_node(nodelist[2]) |
| 299 | start = 4 |
| 300 | else: |
| 301 | dest = None |
| 302 | start = 1 |
| 303 | for i in range(start, len(nodelist), 2): |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 304 | items.append(self.com_node(nodelist[i])) |
| 305 | if nodelist[-1][0] == token.COMMA: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 306 | n = Print(items, dest) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 307 | n.lineno = nodelist[0][2] |
| 308 | return n |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 309 | n = Printnl(items, dest) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 310 | n.lineno = nodelist[0][2] |
| 311 | return n |
| 312 | |
| 313 | def del_stmt(self, nodelist): |
| 314 | return self.com_assign(nodelist[1], OP_DELETE) |
| 315 | |
| 316 | def pass_stmt(self, nodelist): |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 317 | n = Pass() |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 318 | n.lineno = nodelist[0][2] |
| 319 | return n |
| 320 | |
| 321 | def break_stmt(self, nodelist): |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 322 | n = Break() |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 323 | n.lineno = nodelist[0][2] |
| 324 | return n |
| 325 | |
| 326 | def continue_stmt(self, nodelist): |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 327 | n = Continue() |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 328 | n.lineno = nodelist[0][2] |
| 329 | return n |
| 330 | |
| 331 | def return_stmt(self, nodelist): |
| 332 | # return: [testlist] |
| 333 | if len(nodelist) < 2: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 334 | n = Return(Const(None)) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 335 | n.lineno = nodelist[0][2] |
| 336 | return n |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 337 | n = Return(self.com_node(nodelist[1])) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 338 | n.lineno = nodelist[0][2] |
| 339 | return n |
| 340 | |
| 341 | def raise_stmt(self, nodelist): |
| 342 | # raise: [test [',' test [',' test]]] |
| 343 | if len(nodelist) > 5: |
| 344 | expr3 = self.com_node(nodelist[5]) |
| 345 | else: |
| 346 | expr3 = None |
| 347 | if len(nodelist) > 3: |
| 348 | expr2 = self.com_node(nodelist[3]) |
| 349 | else: |
| 350 | expr2 = None |
| 351 | if len(nodelist) > 1: |
| 352 | expr1 = self.com_node(nodelist[1]) |
| 353 | else: |
| 354 | expr1 = None |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 355 | n = Raise(expr1, expr2, expr3) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 356 | n.lineno = nodelist[0][2] |
| 357 | return n |
| 358 | |
| 359 | def import_stmt(self, nodelist): |
| 360 | # import_stmt: 'import' dotted_as_name (',' dotted_as_name)* | |
| 361 | # from: 'from' dotted_name 'import' |
| 362 | # ('*' | import_as_name (',' import_as_name)*) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 363 | if nodelist[0][1] == 'from': |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 364 | names = [] |
| 365 | if nodelist[3][0] == token.NAME: |
| 366 | for i in range(3, len(nodelist), 2): |
| 367 | names.append((nodelist[i][1], None)) |
| 368 | else: |
| 369 | for i in range(3, len(nodelist), 2): |
| 370 | names.append(self.com_import_as_name(nodelist[i][1])) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 371 | n = From(self.com_dotted_name(nodelist[1]), names) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 372 | n.lineno = nodelist[0][2] |
| 373 | return n |
| 374 | |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 375 | if nodelist[1][0] == symbol.dotted_name: |
| 376 | names = [(self.com_dotted_name(nodelist[1][1:]), None)] |
| 377 | else: |
| 378 | names = [] |
| 379 | for i in range(1, len(nodelist), 2): |
| 380 | names.append(self.com_dotted_as_name(nodelist[i])) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 381 | n = Import(names) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 382 | n.lineno = nodelist[0][2] |
| 383 | return n |
| 384 | |
| 385 | def global_stmt(self, nodelist): |
| 386 | # global: NAME (',' NAME)* |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 387 | names = [] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 388 | for i in range(1, len(nodelist), 2): |
| 389 | names.append(nodelist[i][1]) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 390 | n = Global(names) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 391 | n.lineno = nodelist[0][2] |
| 392 | return n |
| 393 | |
| 394 | def exec_stmt(self, nodelist): |
| 395 | # exec_stmt: 'exec' expr ['in' expr [',' expr]] |
| 396 | expr1 = self.com_node(nodelist[1]) |
| 397 | if len(nodelist) >= 4: |
| 398 | expr2 = self.com_node(nodelist[3]) |
| 399 | if len(nodelist) >= 6: |
| 400 | expr3 = self.com_node(nodelist[5]) |
| 401 | else: |
| 402 | expr3 = None |
| 403 | else: |
| 404 | expr2 = expr3 = None |
| 405 | |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 406 | n = Exec(expr1, expr2, expr3) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 407 | n.lineno = nodelist[0][2] |
| 408 | return n |
| 409 | |
| 410 | def assert_stmt(self, nodelist): |
| 411 | # 'assert': test, [',' test] |
| 412 | expr1 = self.com_node(nodelist[1]) |
| 413 | if (len(nodelist) == 4): |
| 414 | expr2 = self.com_node(nodelist[3]) |
| 415 | else: |
Jeremy Hylton | a59ac0a | 2000-11-06 03:33:52 +0000 | [diff] [blame] | 416 | expr2 = None |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 417 | n = Assert(expr1, expr2) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 418 | n.lineno = nodelist[0][2] |
| 419 | return n |
| 420 | |
| 421 | def if_stmt(self, nodelist): |
| 422 | # if: test ':' suite ('elif' test ':' suite)* ['else' ':' suite] |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 423 | tests = [] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 424 | for i in range(0, len(nodelist) - 3, 4): |
| 425 | testNode = self.com_node(nodelist[i + 1]) |
| 426 | suiteNode = self.com_node(nodelist[i + 3]) |
| 427 | tests.append((testNode, suiteNode)) |
| 428 | |
| 429 | if len(nodelist) % 4 == 3: |
| 430 | elseNode = self.com_node(nodelist[-1]) |
| 431 | ## elseNode.lineno = nodelist[-1][1][2] |
| 432 | else: |
| 433 | elseNode = None |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 434 | n = If(tests, elseNode) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 435 | n.lineno = nodelist[0][2] |
| 436 | return n |
| 437 | |
| 438 | def while_stmt(self, nodelist): |
| 439 | # 'while' test ':' suite ['else' ':' suite] |
| 440 | |
| 441 | testNode = self.com_node(nodelist[1]) |
| 442 | bodyNode = self.com_node(nodelist[3]) |
| 443 | |
| 444 | if len(nodelist) > 4: |
| 445 | elseNode = self.com_node(nodelist[6]) |
| 446 | else: |
| 447 | elseNode = None |
| 448 | |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 449 | n = While(testNode, bodyNode, elseNode) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 450 | n.lineno = nodelist[0][2] |
| 451 | return n |
| 452 | |
| 453 | def for_stmt(self, nodelist): |
| 454 | # 'for' exprlist 'in' exprlist ':' suite ['else' ':' suite] |
| 455 | |
| 456 | assignNode = self.com_assign(nodelist[1], OP_ASSIGN) |
| 457 | listNode = self.com_node(nodelist[3]) |
| 458 | bodyNode = self.com_node(nodelist[5]) |
| 459 | |
| 460 | if len(nodelist) > 8: |
| 461 | elseNode = self.com_node(nodelist[8]) |
| 462 | else: |
| 463 | elseNode = None |
| 464 | |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 465 | n = For(assignNode, listNode, bodyNode, elseNode) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 466 | n.lineno = nodelist[0][2] |
| 467 | return n |
| 468 | |
| 469 | def try_stmt(self, nodelist): |
| 470 | # 'try' ':' suite (except_clause ':' suite)+ ['else' ':' suite] |
| 471 | # | 'try' ':' suite 'finally' ':' suite |
| 472 | if nodelist[3][0] != symbol.except_clause: |
| 473 | return self.com_try_finally(nodelist) |
| 474 | |
| 475 | return self.com_try_except(nodelist) |
| 476 | |
| 477 | def suite(self, nodelist): |
| 478 | # simple_stmt | NEWLINE INDENT NEWLINE* (stmt NEWLINE*)+ DEDENT |
| 479 | if len(nodelist) == 1: |
| 480 | return self.com_stmt(nodelist[0]) |
| 481 | |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 482 | stmts = [] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 483 | for node in nodelist: |
| 484 | if node[0] == symbol.stmt: |
| 485 | self.com_append_stmt(stmts, node) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 486 | return Stmt(stmts) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 487 | |
| 488 | # -------------------------------------------------------------- |
| 489 | # |
| 490 | # EXPRESSION NODES (invoked by com_node()) |
| 491 | # |
| 492 | |
| 493 | def testlist(self, nodelist): |
| 494 | # testlist: expr (',' expr)* [','] |
| 495 | # exprlist: expr (',' expr)* [','] |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 496 | return self.com_binary(Tuple, nodelist) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 497 | |
| 498 | exprlist = testlist |
| 499 | |
| 500 | def test(self, nodelist): |
| 501 | # and_test ('or' and_test)* | lambdef |
| 502 | if len(nodelist) == 1 and nodelist[0][0] == symbol.lambdef: |
| 503 | return self.lambdef(nodelist[0]) |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 504 | return self.com_binary(Or, nodelist) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 505 | |
| 506 | def and_test(self, nodelist): |
| 507 | # not_test ('and' not_test)* |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 508 | return self.com_binary(And, nodelist) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 509 | |
| 510 | def not_test(self, nodelist): |
| 511 | # 'not' not_test | comparison |
| 512 | result = self.com_node(nodelist[-1]) |
| 513 | if len(nodelist) == 2: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 514 | n = Not(result) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 515 | n.lineno = nodelist[0][2] |
| 516 | return n |
| 517 | return result |
| 518 | |
| 519 | def comparison(self, nodelist): |
| 520 | # comparison: expr (comp_op expr)* |
| 521 | node = self.com_node(nodelist[0]) |
| 522 | if len(nodelist) == 1: |
| 523 | return node |
| 524 | |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 525 | results = [] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 526 | for i in range(2, len(nodelist), 2): |
| 527 | nl = nodelist[i-1] |
| 528 | |
| 529 | # comp_op: '<' | '>' | '=' | '>=' | '<=' | '<>' | '!=' | '==' |
| 530 | # | 'in' | 'not' 'in' | 'is' | 'is' 'not' |
| 531 | n = nl[1] |
| 532 | if n[0] == token.NAME: |
| 533 | type = n[1] |
| 534 | if len(nl) == 3: |
| 535 | if type == 'not': |
| 536 | type = 'not in' |
| 537 | else: |
| 538 | type = 'is not' |
| 539 | else: |
| 540 | type = _cmp_types[n[0]] |
| 541 | |
| 542 | lineno = nl[1][2] |
| 543 | results.append((type, self.com_node(nodelist[i]))) |
| 544 | |
| 545 | # we need a special "compare" node so that we can distinguish |
| 546 | # 3 < x < 5 from (3 < x) < 5 |
| 547 | # the two have very different semantics and results (note that the |
| 548 | # latter form is always true) |
| 549 | |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 550 | n = Compare(node, results) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 551 | n.lineno = lineno |
| 552 | return n |
| 553 | |
| 554 | def expr(self, nodelist): |
| 555 | # xor_expr ('|' xor_expr)* |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 556 | return self.com_binary(Bitor, nodelist) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 557 | |
| 558 | def xor_expr(self, nodelist): |
| 559 | # xor_expr ('^' xor_expr)* |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 560 | return self.com_binary(Bitxor, nodelist) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 561 | |
| 562 | def and_expr(self, nodelist): |
| 563 | # xor_expr ('&' xor_expr)* |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 564 | return self.com_binary(Bitand, nodelist) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 565 | |
| 566 | def shift_expr(self, nodelist): |
| 567 | # shift_expr ('<<'|'>>' shift_expr)* |
| 568 | node = self.com_node(nodelist[0]) |
| 569 | for i in range(2, len(nodelist), 2): |
| 570 | right = self.com_node(nodelist[i]) |
| 571 | if nodelist[i-1][0] == token.LEFTSHIFT: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 572 | node = LeftShift([node, right]) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 573 | node.lineno = nodelist[1][2] |
| 574 | else: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 575 | node = RightShift([node, right]) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 576 | node.lineno = nodelist[1][2] |
| 577 | return node |
| 578 | |
| 579 | def arith_expr(self, nodelist): |
| 580 | node = self.com_node(nodelist[0]) |
| 581 | for i in range(2, len(nodelist), 2): |
| 582 | right = self.com_node(nodelist[i]) |
| 583 | if nodelist[i-1][0] == token.PLUS: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 584 | node = Add([node, right]) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 585 | node.lineno = nodelist[1][2] |
| 586 | else: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 587 | node = Sub([node, right]) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 588 | node.lineno = nodelist[1][2] |
| 589 | return node |
| 590 | |
| 591 | def term(self, nodelist): |
| 592 | node = self.com_node(nodelist[0]) |
| 593 | for i in range(2, len(nodelist), 2): |
| 594 | right = self.com_node(nodelist[i]) |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 595 | t = nodelist[i-1][0] |
| 596 | if t == token.STAR: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 597 | node = Mul([node, right]) |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 598 | elif t == token.SLASH: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 599 | node = Div([node, right]) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 600 | else: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 601 | node = Mod([node, right]) |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 602 | node.lineno = nodelist[1][2] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 603 | return node |
| 604 | |
| 605 | def factor(self, nodelist): |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 606 | elt = nodelist[0] |
| 607 | t = elt[0] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 608 | node = self.com_node(nodelist[-1]) |
| 609 | if t == token.PLUS: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 610 | node = UnaryAdd(node) |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 611 | node.lineno = elt[2] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 612 | elif t == token.MINUS: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 613 | node = UnarySub(node) |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 614 | node.lineno = elt[2] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 615 | elif t == token.TILDE: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 616 | node = Invert(node) |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 617 | node.lineno = elt[2] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 618 | return node |
| 619 | |
| 620 | def power(self, nodelist): |
| 621 | # power: atom trailer* ('**' factor)* |
| 622 | node = self.com_node(nodelist[0]) |
| 623 | for i in range(1, len(nodelist)): |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 624 | elt = nodelist[i] |
| 625 | if elt[0] == token.DOUBLESTAR: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 626 | n = Power([node, self.com_node(nodelist[i+1])]) |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 627 | n.lineno = elt[2] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 628 | return n |
| 629 | |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 630 | node = self.com_apply_trailer(node, elt) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 631 | |
| 632 | return node |
| 633 | |
| 634 | def atom(self, nodelist): |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 635 | return self._atom_dispatch[nodelist[0][0]](nodelist) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 636 | |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 637 | def atom_lpar(self, nodelist): |
| 638 | if nodelist[1][0] == token.RPAR: |
| 639 | n = Tuple(()) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 640 | n.lineno = nodelist[0][2] |
| 641 | return n |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 642 | return self.com_node(nodelist[1]) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 643 | |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 644 | def atom_lsqb(self, nodelist): |
| 645 | if nodelist[1][0] == token.RSQB: |
| 646 | n = List(()) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 647 | n.lineno = nodelist[0][2] |
| 648 | return n |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 649 | return self.com_list_constructor(nodelist[1]) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 650 | |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 651 | def atom_lbrace(self, nodelist): |
| 652 | if nodelist[1][0] == token.RBRACE: |
| 653 | return Dict(()) |
| 654 | return self.com_dictmaker(nodelist[1]) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 655 | |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 656 | def atom_backquote(self, nodelist): |
| 657 | n = Backquote(self.com_node(nodelist[1])) |
| 658 | n.lineno = nodelist[0][2] |
| 659 | return n |
| 660 | |
| 661 | def atom_number(self, nodelist): |
| 662 | ### need to verify this matches compile.c |
| 663 | k = eval(nodelist[0][1]) |
| 664 | n = Const(k) |
| 665 | n.lineno = nodelist[0][2] |
| 666 | return n |
| 667 | |
| 668 | def atom_string(self, nodelist): |
| 669 | ### need to verify this matches compile.c |
| 670 | k = '' |
| 671 | for node in nodelist: |
| 672 | k = k + eval(node[1]) |
| 673 | n = Const(k) |
| 674 | n.lineno = nodelist[0][2] |
| 675 | return n |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 676 | |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 677 | def atom_name(self, nodelist): |
| 678 | ### any processing to do? |
| 679 | n = Name(nodelist[0][1]) |
| 680 | n.lineno = nodelist[0][2] |
| 681 | return n |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 682 | |
| 683 | # -------------------------------------------------------------- |
| 684 | # |
| 685 | # INTERNAL PARSING UTILITIES |
| 686 | # |
| 687 | |
| 688 | def com_node(self, node): |
| 689 | # Note: compile.c has handling in com_node for del_stmt, pass_stmt, |
| 690 | # break_stmt, stmt, small_stmt, flow_stmt, simple_stmt, |
| 691 | # and compound_stmt. |
| 692 | # We'll just dispatch them. |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 693 | return self._dispatch[node[0]](node[1:]) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 694 | |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 695 | def com_NEWLINE(self): |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 696 | # A ';' at the end of a line can make a NEWLINE token appear |
| 697 | # here, Render it harmless. (genc discards ('discard', |
| 698 | # ('const', xxxx)) Nodes) |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 699 | return Discard(Const(None)) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 700 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 701 | def com_arglist(self, nodelist): |
| 702 | # varargslist: |
| 703 | # (fpdef ['=' test] ',')* ('*' NAME [',' ('**'|'*' '*') NAME] |
| 704 | # | fpdef ['=' test] (',' fpdef ['=' test])* [','] |
| 705 | # | ('**'|'*' '*') NAME) |
| 706 | # fpdef: NAME | '(' fplist ')' |
| 707 | # fplist: fpdef (',' fpdef)* [','] |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 708 | names = [] |
| 709 | defaults = [] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 710 | flags = 0 |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 711 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 712 | i = 0 |
| 713 | while i < len(nodelist): |
| 714 | node = nodelist[i] |
| 715 | if node[0] == token.STAR or node[0] == token.DOUBLESTAR: |
| 716 | if node[0] == token.STAR: |
| 717 | node = nodelist[i+1] |
| 718 | if node[0] == token.NAME: |
| 719 | names.append(node[1]) |
| 720 | flags = flags | CO_VARARGS |
| 721 | i = i + 3 |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 722 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 723 | if i < len(nodelist): |
| 724 | # should be DOUBLESTAR or STAR STAR |
| 725 | if nodelist[i][0] == token.DOUBLESTAR: |
| 726 | node = nodelist[i+1] |
| 727 | else: |
| 728 | node = nodelist[i+2] |
| 729 | names.append(node[1]) |
| 730 | flags = flags | CO_VARKEYWORDS |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 731 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 732 | break |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 733 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 734 | # fpdef: NAME | '(' fplist ')' |
| 735 | names.append(self.com_fpdef(node)) |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 736 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 737 | i = i + 1 |
| 738 | if i >= len(nodelist): |
| 739 | break |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 740 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 741 | if nodelist[i][0] == token.EQUAL: |
| 742 | defaults.append(self.com_node(nodelist[i + 1])) |
| 743 | i = i + 2 |
| 744 | elif len(defaults): |
| 745 | # Treat "(a=1, b)" as "(a=1, b=None)" |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 746 | defaults.append(Const(None)) |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 747 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 748 | i = i + 1 |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 749 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 750 | return names, defaults, flags |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 751 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 752 | def com_fpdef(self, node): |
| 753 | # fpdef: NAME | '(' fplist ')' |
| 754 | if node[1][0] == token.LPAR: |
| 755 | return self.com_fplist(node[2]) |
| 756 | return node[1][1] |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 757 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 758 | def com_fplist(self, node): |
| 759 | # fplist: fpdef (',' fpdef)* [','] |
| 760 | if len(node) == 2: |
| 761 | return self.com_fpdef(node[1]) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 762 | list = [] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 763 | for i in range(1, len(node), 2): |
| 764 | list.append(self.com_fpdef(node[i])) |
| 765 | return tuple(list) |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 766 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 767 | def com_dotted_name(self, node): |
| 768 | # String together the dotted names and return the string |
| 769 | name = "" |
| 770 | for n in node: |
| 771 | if type(n) == type(()) and n[0] == 1: |
| 772 | name = name + n[1] + '.' |
| 773 | return name[:-1] |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 774 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 775 | def com_dotted_as_name(self, node): |
| 776 | dot = self.com_dotted_name(node[1]) |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 777 | if len(node) <= 2: |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 778 | return dot, None |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 779 | if node[0] == symbol.dotted_name: |
| 780 | pass |
| 781 | else: |
| 782 | assert node[2][1] == 'as' |
| 783 | assert node[3][0] == token.NAME |
| 784 | return dot, node[3][1] |
Jeremy Hylton | 2051608 | 2000-09-01 20:33:26 +0000 | [diff] [blame] | 785 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 786 | def com_import_as_name(self, node): |
Jeremy Hylton | 4e1be72 | 2000-10-12 20:23:23 +0000 | [diff] [blame] | 787 | if node == '*': |
| 788 | return '*', None |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 789 | if node[0] == token.NAME: |
| 790 | return node[1], None |
| 791 | assert len(node) == 4 |
| 792 | assert node[2][1] == 'as' |
| 793 | assert node[3][0] == token.NAME |
| 794 | return node[1][1], node[3][1] |
Jeremy Hylton | 2051608 | 2000-09-01 20:33:26 +0000 | [diff] [blame] | 795 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 796 | def com_bases(self, node): |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 797 | bases = [] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 798 | for i in range(1, len(node), 2): |
| 799 | bases.append(self.com_node(node[i])) |
| 800 | return bases |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 801 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 802 | def com_try_finally(self, nodelist): |
| 803 | # try_fin_stmt: "try" ":" suite "finally" ":" suite |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 804 | n = TryFinally(self.com_node(nodelist[2]), |
| 805 | self.com_node(nodelist[5])) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 806 | n.lineno = nodelist[0][2] |
| 807 | return n |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 808 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 809 | def com_try_except(self, nodelist): |
| 810 | # try_except: 'try' ':' suite (except_clause ':' suite)* ['else' suite] |
| 811 | #tryexcept: [TryNode, [except_clauses], elseNode)] |
| 812 | stmt = self.com_node(nodelist[2]) |
| 813 | clauses = [] |
| 814 | elseNode = None |
| 815 | for i in range(3, len(nodelist), 3): |
| 816 | node = nodelist[i] |
| 817 | if node[0] == symbol.except_clause: |
| 818 | # except_clause: 'except' [expr [',' expr]] */ |
| 819 | if len(node) > 2: |
| 820 | expr1 = self.com_node(node[2]) |
| 821 | if len(node) > 4: |
| 822 | expr2 = self.com_assign(node[4], OP_ASSIGN) |
| 823 | else: |
| 824 | expr2 = None |
| 825 | else: |
| 826 | expr1 = expr2 = None |
| 827 | clauses.append((expr1, expr2, self.com_node(nodelist[i+2]))) |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 828 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 829 | if node[0] == token.NAME: |
| 830 | elseNode = self.com_node(nodelist[i+2]) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 831 | n = TryExcept(self.com_node(nodelist[2]), clauses, elseNode) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 832 | n.lineno = nodelist[0][2] |
| 833 | return n |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 834 | |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 835 | def com_augassign_op(self, node): |
| 836 | assert node[0] == symbol.augassign |
| 837 | return node[1] |
| 838 | |
| 839 | def com_augassign(self, node): |
| 840 | """Return node suitable for lvalue of augmented assignment |
| 841 | |
| 842 | Names, slices, and attributes are the only allowable nodes. |
| 843 | """ |
| 844 | l = self.com_node(node) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 845 | if l.__class__ in (Name, Slice, Subscript, Getattr): |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 846 | return l |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 847 | raise SyntaxError, "can't assign to %s" % l.__class__.__name__ |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 848 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 849 | def com_assign(self, node, assigning): |
| 850 | # return a node suitable for use as an "lvalue" |
| 851 | # loop to avoid trivial recursion |
| 852 | while 1: |
| 853 | t = node[0] |
| 854 | if t == symbol.exprlist or t == symbol.testlist: |
| 855 | if len(node) > 2: |
| 856 | return self.com_assign_tuple(node, assigning) |
| 857 | node = node[1] |
| 858 | elif t in _assign_types: |
| 859 | if len(node) > 2: |
| 860 | raise SyntaxError, "can't assign to operator" |
| 861 | node = node[1] |
| 862 | elif t == symbol.power: |
| 863 | if node[1][0] != symbol.atom: |
| 864 | raise SyntaxError, "can't assign to operator" |
| 865 | if len(node) > 2: |
| 866 | primary = self.com_node(node[1]) |
| 867 | for i in range(2, len(node)-1): |
| 868 | ch = node[i] |
| 869 | if ch[0] == token.DOUBLESTAR: |
| 870 | raise SyntaxError, "can't assign to operator" |
| 871 | primary = self.com_apply_trailer(primary, ch) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 872 | return self.com_assign_trailer(primary, node[-1], |
| 873 | assigning) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 874 | node = node[1] |
| 875 | elif t == symbol.atom: |
| 876 | t = node[1][0] |
| 877 | if t == token.LPAR: |
| 878 | node = node[2] |
| 879 | if node[0] == token.RPAR: |
| 880 | raise SyntaxError, "can't assign to ()" |
| 881 | elif t == token.LSQB: |
| 882 | node = node[2] |
| 883 | if node[0] == token.RSQB: |
| 884 | raise SyntaxError, "can't assign to []" |
| 885 | return self.com_assign_list(node, assigning) |
| 886 | elif t == token.NAME: |
| 887 | return self.com_assign_name(node[1], assigning) |
| 888 | else: |
| 889 | raise SyntaxError, "can't assign to literal" |
| 890 | else: |
| 891 | raise SyntaxError, "bad assignment" |
| 892 | |
| 893 | def com_assign_tuple(self, node, assigning): |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 894 | assigns = [] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 895 | for i in range(1, len(node), 2): |
| 896 | assigns.append(self.com_assign(node[i], assigning)) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 897 | return AssTuple(assigns) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 898 | |
| 899 | def com_assign_list(self, node, assigning): |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 900 | assigns = [] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 901 | for i in range(1, len(node), 2): |
| 902 | assigns.append(self.com_assign(node[i], assigning)) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 903 | return AssList(assigns) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 904 | |
| 905 | def com_assign_name(self, node, assigning): |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 906 | n = AssName(node[1], assigning) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 907 | n.lineno = node[2] |
| 908 | return n |
| 909 | |
| 910 | def com_assign_trailer(self, primary, node, assigning): |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 911 | t = node[1][0] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 912 | if t == token.DOT: |
| 913 | return self.com_assign_attr(primary, node[2], assigning) |
| 914 | if t == token.LSQB: |
| 915 | return self.com_subscriptlist(primary, node[2], assigning) |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 916 | if t == token.LPAR: |
| 917 | raise SyntaxError, "can't assign to function call" |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 918 | raise SyntaxError, "unknown trailer type: %s" % t |
| 919 | |
| 920 | def com_assign_attr(self, primary, node, assigning): |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 921 | return AssAttr(primary, node[1], assigning) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 922 | |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 923 | def com_binary(self, constructor, nodelist): |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 924 | "Compile 'NODE (OP NODE)*' into (type, [ node1, ..., nodeN ])." |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 925 | l = len(nodelist) |
| 926 | if l == 1: |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 927 | return self.com_node(nodelist[0]) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 928 | items = [] |
| 929 | for i in range(0, l, 2): |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 930 | items.append(self.com_node(nodelist[i])) |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 931 | return constructor(items) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 932 | |
| 933 | def com_stmt(self, node): |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 934 | result = self.com_node(node) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 935 | assert result is not None |
| 936 | if isinstance(result, Stmt): |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 937 | return result |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 938 | return Stmt([result]) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 939 | |
| 940 | def com_append_stmt(self, stmts, node): |
| 941 | result = self.com_node(node) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 942 | assert result is not None |
| 943 | if isinstance(result, Stmt): |
| 944 | stmts.extend(result.nodes) |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 945 | else: |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 946 | stmts.append(result) |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 947 | |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 948 | if hasattr(symbol, 'list_for'): |
| 949 | def com_list_constructor(self, nodelist): |
| 950 | # listmaker: test ( list_for | (',' test)* [','] ) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 951 | values = [] |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 952 | for i in range(1, len(nodelist)): |
| 953 | if nodelist[i][0] == symbol.list_for: |
| 954 | assert len(nodelist[i:]) == 1 |
| 955 | return self.com_list_comprehension(values[0], |
| 956 | nodelist[i]) |
| 957 | elif nodelist[i][0] == token.COMMA: |
| 958 | continue |
| 959 | values.append(self.com_node(nodelist[i])) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 960 | return List(values) |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 961 | |
| 962 | def com_list_comprehension(self, expr, node): |
| 963 | # list_iter: list_for | list_if |
| 964 | # list_for: 'for' exprlist 'in' testlist [list_iter] |
| 965 | # list_if: 'if' test [list_iter] |
| 966 | lineno = node[1][2] |
| 967 | fors = [] |
| 968 | while node: |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 969 | t = node[1][1] |
| 970 | if t == 'for': |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 971 | assignNode = self.com_assign(node[2], OP_ASSIGN) |
| 972 | listNode = self.com_node(node[4]) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 973 | newfor = ListCompFor(assignNode, listNode, []) |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 974 | newfor.lineno = node[1][2] |
| 975 | fors.append(newfor) |
| 976 | if len(node) == 5: |
| 977 | node = None |
| 978 | else: |
| 979 | node = self.com_list_iter(node[5]) |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 980 | elif t == 'if': |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 981 | test = self.com_node(node[2]) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 982 | newif = ListCompIf(test) |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 983 | newif.lineno = node[1][2] |
| 984 | newfor.ifs.append(newif) |
| 985 | if len(node) == 3: |
| 986 | node = None |
| 987 | else: |
| 988 | node = self.com_list_iter(node[3]) |
| 989 | else: |
| 990 | raise SyntaxError, \ |
| 991 | ("unexpected list comprehension element: %s %d" |
| 992 | % (node, lineno)) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 993 | n = ListComp(expr, fors) |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 994 | n.lineno = lineno |
| 995 | return n |
| 996 | |
| 997 | def com_list_iter(self, node): |
| 998 | assert node[0] == symbol.list_iter |
| 999 | return node[1] |
| 1000 | else: |
| 1001 | def com_list_constructor(self, nodelist): |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1002 | values = [] |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 1003 | for i in range(1, len(nodelist), 2): |
| 1004 | values.append(self.com_node(nodelist[i])) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1005 | return List(values) |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1006 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1007 | def com_dictmaker(self, nodelist): |
| 1008 | # dictmaker: test ':' test (',' test ':' value)* [','] |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1009 | items = [] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1010 | for i in range(1, len(nodelist), 4): |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 1011 | items.append((self.com_node(nodelist[i]), |
| 1012 | self.com_node(nodelist[i+2]))) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1013 | return Dict(items) |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1014 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1015 | def com_apply_trailer(self, primaryNode, nodelist): |
| 1016 | t = nodelist[1][0] |
| 1017 | if t == token.LPAR: |
| 1018 | return self.com_call_function(primaryNode, nodelist[2]) |
| 1019 | if t == token.DOT: |
| 1020 | return self.com_select_member(primaryNode, nodelist[2]) |
| 1021 | if t == token.LSQB: |
| 1022 | return self.com_subscriptlist(primaryNode, nodelist[2], OP_APPLY) |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1023 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1024 | raise SyntaxError, 'unknown node type: %s' % t |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1025 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1026 | def com_select_member(self, primaryNode, nodelist): |
| 1027 | if nodelist[0] != token.NAME: |
| 1028 | raise SyntaxError, "member must be a name" |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1029 | n = Getattr(primaryNode, nodelist[1]) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1030 | n.lineno = nodelist[2] |
| 1031 | return n |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1032 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1033 | def com_call_function(self, primaryNode, nodelist): |
| 1034 | if nodelist[0] == token.RPAR: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1035 | return CallFunc(primaryNode, []) |
| 1036 | args = [] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1037 | kw = 0 |
| 1038 | len_nodelist = len(nodelist) |
| 1039 | for i in range(1, len_nodelist, 2): |
| 1040 | node = nodelist[i] |
| 1041 | if node[0] == token.STAR or node[0] == token.DOUBLESTAR: |
| 1042 | break |
| 1043 | kw, result = self.com_argument(node, kw) |
| 1044 | args.append(result) |
Jeremy Hylton | be317e6 | 2000-05-02 22:32:59 +0000 | [diff] [blame] | 1045 | else: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1046 | # No broken by star arg, so skip the last one we processed. |
| 1047 | i = i + 1 |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1048 | if i < len_nodelist and nodelist[i][0] == token.COMMA: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1049 | # need to accept an application that looks like "f(a, b,)" |
| 1050 | i = i + 1 |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1051 | star_node = dstar_node = None |
| 1052 | while i < len_nodelist: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1053 | tok = nodelist[i] |
| 1054 | ch = nodelist[i+1] |
| 1055 | i = i + 3 |
| 1056 | if tok[0]==token.STAR: |
| 1057 | if star_node is not None: |
| 1058 | raise SyntaxError, 'already have the varargs indentifier' |
| 1059 | star_node = self.com_node(ch) |
| 1060 | elif tok[0]==token.DOUBLESTAR: |
| 1061 | if dstar_node is not None: |
| 1062 | raise SyntaxError, 'already have the kwargs indentifier' |
| 1063 | dstar_node = self.com_node(ch) |
| 1064 | else: |
| 1065 | raise SyntaxError, 'unknown node type: %s' % tok |
Jeremy Hylton | be317e6 | 2000-05-02 22:32:59 +0000 | [diff] [blame] | 1066 | |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1067 | return CallFunc(primaryNode, args, star_node, dstar_node) |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1068 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1069 | def com_argument(self, nodelist, kw): |
| 1070 | if len(nodelist) == 2: |
| 1071 | if kw: |
| 1072 | raise SyntaxError, "non-keyword arg after keyword arg" |
| 1073 | return 0, self.com_node(nodelist[1]) |
| 1074 | result = self.com_node(nodelist[3]) |
| 1075 | n = nodelist[1] |
| 1076 | while len(n) == 2 and n[0] != token.NAME: |
| 1077 | n = n[1] |
| 1078 | if n[0] != token.NAME: |
| 1079 | raise SyntaxError, "keyword can't be an expression (%s)"%n[0] |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1080 | node = Keyword(n[1], result) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1081 | node.lineno = n[2] |
| 1082 | return 1, node |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1083 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1084 | def com_subscriptlist(self, primary, nodelist, assigning): |
| 1085 | # slicing: simple_slicing | extended_slicing |
| 1086 | # simple_slicing: primary "[" short_slice "]" |
| 1087 | # extended_slicing: primary "[" slice_list "]" |
| 1088 | # slice_list: slice_item ("," slice_item)* [","] |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1089 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1090 | # backwards compat slice for '[i:j]' |
| 1091 | if len(nodelist) == 2: |
| 1092 | sub = nodelist[1] |
| 1093 | if (sub[1][0] == token.COLON or \ |
| 1094 | (len(sub) > 2 and sub[2][0] == token.COLON)) and \ |
| 1095 | sub[-1][0] != symbol.sliceop: |
| 1096 | return self.com_slice(primary, sub, assigning) |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1097 | |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1098 | subscripts = [] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1099 | for i in range(1, len(nodelist), 2): |
| 1100 | subscripts.append(self.com_subscript(nodelist[i])) |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1101 | |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1102 | return Subscript(primary, assigning, subscripts) |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1103 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1104 | def com_subscript(self, node): |
| 1105 | # slice_item: expression | proper_slice | ellipsis |
| 1106 | ch = node[1] |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 1107 | t = ch[0] |
| 1108 | if t == token.DOT and node[2][0] == token.DOT: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1109 | return Ellipsis() |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 1110 | if t == token.COLON or len(node) > 2: |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1111 | return self.com_sliceobj(node) |
| 1112 | return self.com_node(ch) |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1113 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1114 | def com_sliceobj(self, node): |
| 1115 | # proper_slice: short_slice | long_slice |
| 1116 | # short_slice: [lower_bound] ":" [upper_bound] |
| 1117 | # long_slice: short_slice ":" [stride] |
| 1118 | # lower_bound: expression |
| 1119 | # upper_bound: expression |
| 1120 | # stride: expression |
| 1121 | # |
| 1122 | # Note: a stride may be further slicing... |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1123 | |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1124 | items = [] |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1125 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1126 | if node[1][0] == token.COLON: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1127 | items.append(Const(None)) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1128 | i = 2 |
| 1129 | else: |
| 1130 | items.append(self.com_node(node[1])) |
| 1131 | # i == 2 is a COLON |
| 1132 | i = 3 |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1133 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1134 | if i < len(node) and node[i][0] == symbol.test: |
| 1135 | items.append(self.com_node(node[i])) |
| 1136 | i = i + 1 |
| 1137 | else: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1138 | items.append(Const(None)) |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1139 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1140 | # a short_slice has been built. look for long_slice now by looking |
| 1141 | # for strides... |
| 1142 | for j in range(i, len(node)): |
| 1143 | ch = node[j] |
| 1144 | if len(ch) == 2: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1145 | items.append(Const(None)) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1146 | else: |
| 1147 | items.append(self.com_node(ch[2])) |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1148 | |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1149 | return Sliceobj(items) |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1150 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1151 | def com_slice(self, primary, node, assigning): |
| 1152 | # short_slice: [lower_bound] ":" [upper_bound] |
| 1153 | lower = upper = None |
| 1154 | if len(node) == 3: |
| 1155 | if node[1][0] == token.COLON: |
| 1156 | upper = self.com_node(node[2]) |
| 1157 | else: |
| 1158 | lower = self.com_node(node[1]) |
| 1159 | elif len(node) == 4: |
| 1160 | lower = self.com_node(node[1]) |
| 1161 | upper = self.com_node(node[3]) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1162 | return Slice(primary, assigning, lower, upper) |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1163 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1164 | def get_docstring(self, node, n=None): |
| 1165 | if n is None: |
| 1166 | n = node[0] |
| 1167 | node = node[1:] |
| 1168 | if n == symbol.suite: |
| 1169 | if len(node) == 1: |
| 1170 | return self.get_docstring(node[0]) |
| 1171 | for sub in node: |
| 1172 | if sub[0] == symbol.stmt: |
| 1173 | return self.get_docstring(sub) |
| 1174 | return None |
| 1175 | if n == symbol.file_input: |
| 1176 | for sub in node: |
| 1177 | if sub[0] == symbol.stmt: |
| 1178 | return self.get_docstring(sub) |
| 1179 | return None |
| 1180 | if n == symbol.atom: |
| 1181 | if node[0][0] == token.STRING: |
| 1182 | s = '' |
| 1183 | for t in node: |
| 1184 | s = s + eval(t[1]) |
| 1185 | return s |
| 1186 | return None |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1187 | if n == symbol.stmt or n == symbol.simple_stmt \ |
| 1188 | or n == symbol.small_stmt: |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1189 | return self.get_docstring(node[0]) |
| 1190 | if n in _doc_nodes and len(node) == 1: |
| 1191 | return self.get_docstring(node[0]) |
| 1192 | return None |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1193 | |
| 1194 | |
| 1195 | _doc_nodes = [ |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1196 | symbol.expr_stmt, |
| 1197 | symbol.testlist, |
| 1198 | symbol.test, |
| 1199 | symbol.and_test, |
| 1200 | symbol.not_test, |
| 1201 | symbol.comparison, |
| 1202 | symbol.expr, |
| 1203 | symbol.xor_expr, |
| 1204 | symbol.and_expr, |
| 1205 | symbol.shift_expr, |
| 1206 | symbol.arith_expr, |
| 1207 | symbol.term, |
| 1208 | symbol.factor, |
| 1209 | symbol.power, |
| 1210 | ] |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1211 | |
| 1212 | # comp_op: '<' | '>' | '=' | '>=' | '<=' | '<>' | '!=' | '==' |
| 1213 | # | 'in' | 'not' 'in' | 'is' | 'is' 'not' |
| 1214 | _cmp_types = { |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1215 | token.LESS : '<', |
| 1216 | token.GREATER : '>', |
| 1217 | token.EQEQUAL : '==', |
| 1218 | token.EQUAL : '==', |
| 1219 | token.LESSEQUAL : '<=', |
| 1220 | token.GREATEREQUAL : '>=', |
| 1221 | token.NOTEQUAL : '!=', |
| 1222 | } |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1223 | |
| 1224 | _legal_node_types = [ |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1225 | symbol.funcdef, |
| 1226 | symbol.classdef, |
| 1227 | symbol.stmt, |
| 1228 | symbol.small_stmt, |
| 1229 | symbol.flow_stmt, |
| 1230 | symbol.simple_stmt, |
| 1231 | symbol.compound_stmt, |
| 1232 | symbol.expr_stmt, |
| 1233 | symbol.print_stmt, |
| 1234 | symbol.del_stmt, |
| 1235 | symbol.pass_stmt, |
| 1236 | symbol.break_stmt, |
| 1237 | symbol.continue_stmt, |
| 1238 | symbol.return_stmt, |
| 1239 | symbol.raise_stmt, |
| 1240 | symbol.import_stmt, |
| 1241 | symbol.global_stmt, |
| 1242 | symbol.exec_stmt, |
| 1243 | symbol.assert_stmt, |
| 1244 | symbol.if_stmt, |
| 1245 | symbol.while_stmt, |
| 1246 | symbol.for_stmt, |
| 1247 | symbol.try_stmt, |
| 1248 | symbol.suite, |
| 1249 | symbol.testlist, |
| 1250 | symbol.test, |
| 1251 | symbol.and_test, |
| 1252 | symbol.not_test, |
| 1253 | symbol.comparison, |
| 1254 | symbol.exprlist, |
| 1255 | symbol.expr, |
| 1256 | symbol.xor_expr, |
| 1257 | symbol.and_expr, |
| 1258 | symbol.shift_expr, |
| 1259 | symbol.arith_expr, |
| 1260 | symbol.term, |
| 1261 | symbol.factor, |
| 1262 | symbol.power, |
| 1263 | symbol.atom, |
| 1264 | ] |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1265 | |
| 1266 | _assign_types = [ |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1267 | symbol.test, |
| 1268 | symbol.and_test, |
| 1269 | symbol.not_test, |
| 1270 | symbol.comparison, |
| 1271 | symbol.expr, |
| 1272 | symbol.xor_expr, |
| 1273 | symbol.and_expr, |
| 1274 | symbol.shift_expr, |
| 1275 | symbol.arith_expr, |
| 1276 | symbol.term, |
| 1277 | symbol.factor, |
| 1278 | ] |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 1279 | |
| 1280 | import types |
| 1281 | _names = {} |
| 1282 | for k, v in symbol.sym_name.items(): |
| 1283 | _names[k] = v |
| 1284 | for k, v in token.tok_name.items(): |
| 1285 | _names[k] = v |
| 1286 | |
| 1287 | def debug_tree(tree): |
| 1288 | l = [] |
| 1289 | for elt in tree: |
| 1290 | if type(elt) == types.IntType: |
| 1291 | l.append(_names.get(elt, elt)) |
| 1292 | elif type(elt) == types.StringType: |
| 1293 | l.append(elt) |
| 1294 | else: |
| 1295 | l.append(debug_tree(elt)) |
| 1296 | return l |