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 | ec92734 | 2001-08-18 00:04:31 +0000 | [diff] [blame] | 156 | if doc is not None: |
| 157 | i = 1 |
| 158 | else: |
| 159 | i = 0 |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 160 | stmts = [] |
Jeremy Hylton | ec92734 | 2001-08-18 00:04:31 +0000 | [diff] [blame] | 161 | for node in nodelist[i:]: |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 162 | if node[0] != token.ENDMARKER and node[0] != token.NEWLINE: |
| 163 | self.com_append_stmt(stmts, node) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 164 | return Module(doc, Stmt(stmts)) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 165 | |
| 166 | def eval_input(self, nodelist): |
| 167 | # from the built-in function input() |
| 168 | ### is this sufficient? |
| 169 | return self.com_node(nodelist[0]) |
| 170 | |
| 171 | def funcdef(self, nodelist): |
| 172 | # funcdef: 'def' NAME parameters ':' suite |
| 173 | # parameters: '(' [varargslist] ')' |
| 174 | |
| 175 | lineno = nodelist[1][2] |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 176 | name = nodelist[1][1] |
| 177 | args = nodelist[2][2] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 178 | |
| 179 | if args[0] == symbol.varargslist: |
| 180 | names, defaults, flags = self.com_arglist(args[1:]) |
| 181 | else: |
| 182 | names = defaults = () |
| 183 | flags = 0 |
| 184 | doc = self.get_docstring(nodelist[4]) |
| 185 | |
| 186 | # code for function |
| 187 | code = self.com_node(nodelist[4]) |
| 188 | |
Jeremy Hylton | a59ac0a | 2000-11-06 03:33:52 +0000 | [diff] [blame] | 189 | if doc is not None: |
| 190 | assert isinstance(code, Stmt) |
| 191 | assert isinstance(code.nodes[0], Discard) |
| 192 | del code.nodes[0] |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 193 | n = Function(name, names, defaults, flags, doc, code) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 194 | n.lineno = lineno |
| 195 | return n |
| 196 | |
| 197 | def lambdef(self, nodelist): |
| 198 | # lambdef: 'lambda' [varargslist] ':' test |
| 199 | if nodelist[2][0] == symbol.varargslist: |
| 200 | names, defaults, flags = self.com_arglist(nodelist[2][1:]) |
| 201 | else: |
| 202 | names = defaults = () |
| 203 | flags = 0 |
| 204 | |
| 205 | # code for lambda |
| 206 | code = self.com_node(nodelist[-1]) |
| 207 | |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 208 | n = Lambda(names, defaults, flags, code) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 209 | n.lineno = nodelist[1][2] |
| 210 | return n |
| 211 | |
| 212 | def classdef(self, nodelist): |
| 213 | # classdef: 'class' NAME ['(' testlist ')'] ':' suite |
| 214 | |
| 215 | name = nodelist[1][1] |
| 216 | doc = self.get_docstring(nodelist[-1]) |
| 217 | if nodelist[2][0] == token.COLON: |
| 218 | bases = [] |
| 219 | else: |
| 220 | bases = self.com_bases(nodelist[3]) |
| 221 | |
| 222 | # code for class |
| 223 | code = self.com_node(nodelist[-1]) |
| 224 | |
Jeremy Hylton | da8db8c | 2001-08-29 17:19:02 +0000 | [diff] [blame] | 225 | if doc is not None: |
| 226 | assert isinstance(code, Stmt) |
| 227 | assert isinstance(code.nodes[0], Discard) |
| 228 | del code.nodes[0] |
| 229 | |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 230 | n = Class(name, bases, doc, code) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 231 | n.lineno = nodelist[1][2] |
| 232 | return n |
| 233 | |
| 234 | def stmt(self, nodelist): |
| 235 | return self.com_stmt(nodelist[0]) |
| 236 | |
| 237 | small_stmt = stmt |
| 238 | flow_stmt = stmt |
| 239 | compound_stmt = stmt |
| 240 | |
| 241 | def simple_stmt(self, nodelist): |
| 242 | # small_stmt (';' small_stmt)* [';'] NEWLINE |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 243 | stmts = [] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 244 | for i in range(0, len(nodelist), 2): |
| 245 | self.com_append_stmt(stmts, nodelist[i]) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 246 | return Stmt(stmts) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 247 | |
| 248 | def parameters(self, nodelist): |
| 249 | raise error |
| 250 | |
| 251 | def varargslist(self, nodelist): |
| 252 | raise error |
| 253 | |
| 254 | def fpdef(self, nodelist): |
| 255 | raise error |
| 256 | |
| 257 | def fplist(self, nodelist): |
| 258 | raise error |
| 259 | |
| 260 | def dotted_name(self, nodelist): |
| 261 | raise error |
| 262 | |
| 263 | def comp_op(self, nodelist): |
| 264 | raise error |
| 265 | |
| 266 | def trailer(self, nodelist): |
| 267 | raise error |
| 268 | |
| 269 | def sliceop(self, nodelist): |
| 270 | raise error |
| 271 | |
| 272 | def argument(self, nodelist): |
| 273 | raise error |
| 274 | |
| 275 | # -------------------------------------------------------------- |
| 276 | # |
| 277 | # STATEMENT NODES (invoked by com_node()) |
| 278 | # |
| 279 | |
| 280 | def expr_stmt(self, nodelist): |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 281 | # augassign testlist | testlist ('=' testlist)* |
Jeremy Hylton | 7e30c9b | 2001-08-27 21:02:51 +0000 | [diff] [blame] | 282 | en = nodelist[-1] |
| 283 | exprNode = self.lookup_node(en)(en[1:]) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 284 | if len(nodelist) == 1: |
Jeremy Hylton | 4c1f427 | 2001-04-11 16:22:26 +0000 | [diff] [blame] | 285 | n = Discard(exprNode) |
| 286 | n.lineno = exprNode.lineno |
| 287 | return n |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 288 | if nodelist[1][0] == token.EQUAL: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 289 | nodes = [] |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 290 | for i in range(0, len(nodelist) - 2, 2): |
| 291 | nodes.append(self.com_assign(nodelist[i], OP_ASSIGN)) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 292 | n = Assign(nodes, exprNode) |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 293 | n.lineno = nodelist[1][2] |
| 294 | else: |
| 295 | lval = self.com_augassign(nodelist[0]) |
| 296 | op = self.com_augassign_op(nodelist[1]) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 297 | n = AugAssign(lval, op[1], exprNode) |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 298 | n.lineno = op[2] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 299 | return n |
| 300 | |
| 301 | def print_stmt(self, nodelist): |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 302 | # print ([ test (',' test)* [','] ] | '>>' test [ (',' test)+ [','] ]) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 303 | items = [] |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 304 | if len(nodelist) == 1: |
| 305 | start = 1 |
| 306 | dest = None |
| 307 | elif nodelist[1][0] == token.RIGHTSHIFT: |
| 308 | assert len(nodelist) == 3 \ |
| 309 | or nodelist[3][0] == token.COMMA |
| 310 | dest = self.com_node(nodelist[2]) |
| 311 | start = 4 |
| 312 | else: |
| 313 | dest = None |
| 314 | start = 1 |
| 315 | for i in range(start, len(nodelist), 2): |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 316 | items.append(self.com_node(nodelist[i])) |
| 317 | if nodelist[-1][0] == token.COMMA: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 318 | n = Print(items, dest) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 319 | n.lineno = nodelist[0][2] |
| 320 | return n |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 321 | n = Printnl(items, dest) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 322 | n.lineno = nodelist[0][2] |
| 323 | return n |
| 324 | |
| 325 | def del_stmt(self, nodelist): |
| 326 | return self.com_assign(nodelist[1], OP_DELETE) |
| 327 | |
| 328 | def pass_stmt(self, nodelist): |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 329 | n = Pass() |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 330 | n.lineno = nodelist[0][2] |
| 331 | return n |
| 332 | |
| 333 | def break_stmt(self, nodelist): |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 334 | n = Break() |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 335 | n.lineno = nodelist[0][2] |
| 336 | return n |
| 337 | |
| 338 | def continue_stmt(self, nodelist): |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 339 | n = Continue() |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 340 | n.lineno = nodelist[0][2] |
| 341 | return n |
| 342 | |
| 343 | def return_stmt(self, nodelist): |
| 344 | # return: [testlist] |
| 345 | if len(nodelist) < 2: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 346 | n = Return(Const(None)) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 347 | n.lineno = nodelist[0][2] |
| 348 | return n |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 349 | n = Return(self.com_node(nodelist[1])) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 350 | n.lineno = nodelist[0][2] |
| 351 | return n |
| 352 | |
Jeremy Hylton | ec92734 | 2001-08-18 00:04:31 +0000 | [diff] [blame] | 353 | def yield_stmt(self, nodelist): |
| 354 | n = Yield(self.com_node(nodelist[1])) |
| 355 | n.lineno = nodelist[0][2] |
| 356 | return n |
| 357 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 358 | def raise_stmt(self, nodelist): |
| 359 | # raise: [test [',' test [',' test]]] |
| 360 | if len(nodelist) > 5: |
| 361 | expr3 = self.com_node(nodelist[5]) |
| 362 | else: |
| 363 | expr3 = None |
| 364 | if len(nodelist) > 3: |
| 365 | expr2 = self.com_node(nodelist[3]) |
| 366 | else: |
| 367 | expr2 = None |
| 368 | if len(nodelist) > 1: |
| 369 | expr1 = self.com_node(nodelist[1]) |
| 370 | else: |
| 371 | expr1 = None |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 372 | n = Raise(expr1, expr2, expr3) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 373 | n.lineno = nodelist[0][2] |
| 374 | return n |
| 375 | |
| 376 | def import_stmt(self, nodelist): |
| 377 | # import_stmt: 'import' dotted_as_name (',' dotted_as_name)* | |
| 378 | # from: 'from' dotted_name 'import' |
| 379 | # ('*' | import_as_name (',' import_as_name)*) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 380 | if nodelist[0][1] == 'from': |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 381 | names = [] |
| 382 | if nodelist[3][0] == token.NAME: |
| 383 | for i in range(3, len(nodelist), 2): |
| 384 | names.append((nodelist[i][1], None)) |
| 385 | else: |
| 386 | for i in range(3, len(nodelist), 2): |
Jeremy Hylton | 42a0830 | 2001-04-09 04:27:12 +0000 | [diff] [blame] | 387 | names.append(self.com_import_as_name(nodelist[i])) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 388 | n = From(self.com_dotted_name(nodelist[1]), names) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 389 | n.lineno = nodelist[0][2] |
| 390 | return n |
| 391 | |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 392 | if nodelist[1][0] == symbol.dotted_name: |
| 393 | names = [(self.com_dotted_name(nodelist[1][1:]), None)] |
| 394 | else: |
| 395 | names = [] |
| 396 | for i in range(1, len(nodelist), 2): |
| 397 | names.append(self.com_dotted_as_name(nodelist[i])) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 398 | n = Import(names) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 399 | n.lineno = nodelist[0][2] |
| 400 | return n |
| 401 | |
| 402 | def global_stmt(self, nodelist): |
| 403 | # global: NAME (',' NAME)* |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 404 | names = [] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 405 | for i in range(1, len(nodelist), 2): |
| 406 | names.append(nodelist[i][1]) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 407 | n = Global(names) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 408 | n.lineno = nodelist[0][2] |
| 409 | return n |
| 410 | |
| 411 | def exec_stmt(self, nodelist): |
| 412 | # exec_stmt: 'exec' expr ['in' expr [',' expr]] |
| 413 | expr1 = self.com_node(nodelist[1]) |
| 414 | if len(nodelist) >= 4: |
| 415 | expr2 = self.com_node(nodelist[3]) |
| 416 | if len(nodelist) >= 6: |
| 417 | expr3 = self.com_node(nodelist[5]) |
| 418 | else: |
| 419 | expr3 = None |
| 420 | else: |
| 421 | expr2 = expr3 = None |
| 422 | |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 423 | n = Exec(expr1, expr2, expr3) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 424 | n.lineno = nodelist[0][2] |
| 425 | return n |
| 426 | |
| 427 | def assert_stmt(self, nodelist): |
| 428 | # 'assert': test, [',' test] |
| 429 | expr1 = self.com_node(nodelist[1]) |
| 430 | if (len(nodelist) == 4): |
| 431 | expr2 = self.com_node(nodelist[3]) |
| 432 | else: |
Jeremy Hylton | a59ac0a | 2000-11-06 03:33:52 +0000 | [diff] [blame] | 433 | expr2 = None |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 434 | n = Assert(expr1, expr2) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 435 | n.lineno = nodelist[0][2] |
| 436 | return n |
| 437 | |
| 438 | def if_stmt(self, nodelist): |
| 439 | # if: test ':' suite ('elif' test ':' suite)* ['else' ':' suite] |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 440 | tests = [] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 441 | for i in range(0, len(nodelist) - 3, 4): |
| 442 | testNode = self.com_node(nodelist[i + 1]) |
| 443 | suiteNode = self.com_node(nodelist[i + 3]) |
| 444 | tests.append((testNode, suiteNode)) |
| 445 | |
| 446 | if len(nodelist) % 4 == 3: |
| 447 | elseNode = self.com_node(nodelist[-1]) |
| 448 | ## elseNode.lineno = nodelist[-1][1][2] |
| 449 | else: |
| 450 | elseNode = None |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 451 | n = If(tests, elseNode) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 452 | n.lineno = nodelist[0][2] |
| 453 | return n |
| 454 | |
| 455 | def while_stmt(self, nodelist): |
| 456 | # 'while' test ':' suite ['else' ':' suite] |
| 457 | |
| 458 | testNode = self.com_node(nodelist[1]) |
| 459 | bodyNode = self.com_node(nodelist[3]) |
| 460 | |
| 461 | if len(nodelist) > 4: |
| 462 | elseNode = self.com_node(nodelist[6]) |
| 463 | else: |
| 464 | elseNode = None |
| 465 | |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 466 | n = While(testNode, bodyNode, elseNode) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 467 | n.lineno = nodelist[0][2] |
| 468 | return n |
| 469 | |
| 470 | def for_stmt(self, nodelist): |
| 471 | # 'for' exprlist 'in' exprlist ':' suite ['else' ':' suite] |
| 472 | |
| 473 | assignNode = self.com_assign(nodelist[1], OP_ASSIGN) |
| 474 | listNode = self.com_node(nodelist[3]) |
| 475 | bodyNode = self.com_node(nodelist[5]) |
| 476 | |
| 477 | if len(nodelist) > 8: |
| 478 | elseNode = self.com_node(nodelist[8]) |
| 479 | else: |
| 480 | elseNode = None |
| 481 | |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 482 | n = For(assignNode, listNode, bodyNode, elseNode) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 483 | n.lineno = nodelist[0][2] |
| 484 | return n |
| 485 | |
| 486 | def try_stmt(self, nodelist): |
| 487 | # 'try' ':' suite (except_clause ':' suite)+ ['else' ':' suite] |
| 488 | # | 'try' ':' suite 'finally' ':' suite |
| 489 | if nodelist[3][0] != symbol.except_clause: |
| 490 | return self.com_try_finally(nodelist) |
| 491 | |
| 492 | return self.com_try_except(nodelist) |
| 493 | |
| 494 | def suite(self, nodelist): |
| 495 | # simple_stmt | NEWLINE INDENT NEWLINE* (stmt NEWLINE*)+ DEDENT |
| 496 | if len(nodelist) == 1: |
| 497 | return self.com_stmt(nodelist[0]) |
| 498 | |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 499 | stmts = [] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 500 | for node in nodelist: |
| 501 | if node[0] == symbol.stmt: |
| 502 | self.com_append_stmt(stmts, node) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 503 | return Stmt(stmts) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 504 | |
| 505 | # -------------------------------------------------------------- |
| 506 | # |
| 507 | # EXPRESSION NODES (invoked by com_node()) |
| 508 | # |
| 509 | |
| 510 | def testlist(self, nodelist): |
| 511 | # testlist: expr (',' expr)* [','] |
| 512 | # exprlist: expr (',' expr)* [','] |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 513 | return self.com_binary(Tuple, nodelist) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 514 | |
| 515 | exprlist = testlist |
| 516 | |
| 517 | def test(self, nodelist): |
| 518 | # and_test ('or' and_test)* | lambdef |
| 519 | if len(nodelist) == 1 and nodelist[0][0] == symbol.lambdef: |
| 520 | return self.lambdef(nodelist[0]) |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 521 | return self.com_binary(Or, nodelist) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 522 | |
| 523 | def and_test(self, nodelist): |
| 524 | # not_test ('and' not_test)* |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 525 | return self.com_binary(And, nodelist) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 526 | |
| 527 | def not_test(self, nodelist): |
| 528 | # 'not' not_test | comparison |
| 529 | result = self.com_node(nodelist[-1]) |
| 530 | if len(nodelist) == 2: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 531 | n = Not(result) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 532 | n.lineno = nodelist[0][2] |
| 533 | return n |
| 534 | return result |
| 535 | |
| 536 | def comparison(self, nodelist): |
| 537 | # comparison: expr (comp_op expr)* |
| 538 | node = self.com_node(nodelist[0]) |
| 539 | if len(nodelist) == 1: |
| 540 | return node |
| 541 | |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 542 | results = [] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 543 | for i in range(2, len(nodelist), 2): |
| 544 | nl = nodelist[i-1] |
| 545 | |
| 546 | # comp_op: '<' | '>' | '=' | '>=' | '<=' | '<>' | '!=' | '==' |
| 547 | # | 'in' | 'not' 'in' | 'is' | 'is' 'not' |
| 548 | n = nl[1] |
| 549 | if n[0] == token.NAME: |
| 550 | type = n[1] |
| 551 | if len(nl) == 3: |
| 552 | if type == 'not': |
| 553 | type = 'not in' |
| 554 | else: |
| 555 | type = 'is not' |
| 556 | else: |
| 557 | type = _cmp_types[n[0]] |
| 558 | |
| 559 | lineno = nl[1][2] |
| 560 | results.append((type, self.com_node(nodelist[i]))) |
| 561 | |
| 562 | # we need a special "compare" node so that we can distinguish |
| 563 | # 3 < x < 5 from (3 < x) < 5 |
| 564 | # the two have very different semantics and results (note that the |
| 565 | # latter form is always true) |
| 566 | |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 567 | n = Compare(node, results) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 568 | n.lineno = lineno |
| 569 | return n |
| 570 | |
| 571 | def expr(self, nodelist): |
| 572 | # xor_expr ('|' xor_expr)* |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 573 | return self.com_binary(Bitor, nodelist) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 574 | |
| 575 | def xor_expr(self, nodelist): |
| 576 | # xor_expr ('^' xor_expr)* |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 577 | return self.com_binary(Bitxor, nodelist) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 578 | |
| 579 | def and_expr(self, nodelist): |
| 580 | # xor_expr ('&' xor_expr)* |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 581 | return self.com_binary(Bitand, nodelist) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 582 | |
| 583 | def shift_expr(self, nodelist): |
| 584 | # shift_expr ('<<'|'>>' shift_expr)* |
| 585 | node = self.com_node(nodelist[0]) |
| 586 | for i in range(2, len(nodelist), 2): |
| 587 | right = self.com_node(nodelist[i]) |
| 588 | if nodelist[i-1][0] == token.LEFTSHIFT: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 589 | node = LeftShift([node, right]) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 590 | node.lineno = nodelist[1][2] |
Jeremy Hylton | 7abf520 | 2001-08-29 18:12:30 +0000 | [diff] [blame^] | 591 | elif nodelist[i-1][0] == token.RIGHTSHIFT: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 592 | node = RightShift([node, right]) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 593 | node.lineno = nodelist[1][2] |
Jeremy Hylton | 7abf520 | 2001-08-29 18:12:30 +0000 | [diff] [blame^] | 594 | else: |
| 595 | raise ValueError, "unexpected token: %s" % nodelist[i-1][0] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 596 | return node |
| 597 | |
| 598 | def arith_expr(self, nodelist): |
| 599 | node = self.com_node(nodelist[0]) |
| 600 | for i in range(2, len(nodelist), 2): |
| 601 | right = self.com_node(nodelist[i]) |
| 602 | if nodelist[i-1][0] == token.PLUS: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 603 | node = Add([node, right]) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 604 | node.lineno = nodelist[1][2] |
Jeremy Hylton | 7abf520 | 2001-08-29 18:12:30 +0000 | [diff] [blame^] | 605 | elif nodelist[i-1][0] == token.MINUS: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 606 | node = Sub([node, right]) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 607 | node.lineno = nodelist[1][2] |
Jeremy Hylton | 7abf520 | 2001-08-29 18:12:30 +0000 | [diff] [blame^] | 608 | else: |
| 609 | raise ValueError, "unexpected token: %s" % nodelist[i-1][0] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 610 | return node |
| 611 | |
| 612 | def term(self, nodelist): |
| 613 | node = self.com_node(nodelist[0]) |
| 614 | for i in range(2, len(nodelist), 2): |
| 615 | right = self.com_node(nodelist[i]) |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 616 | t = nodelist[i-1][0] |
| 617 | if t == token.STAR: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 618 | node = Mul([node, right]) |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 619 | elif t == token.SLASH: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 620 | node = Div([node, right]) |
Jeremy Hylton | 7abf520 | 2001-08-29 18:12:30 +0000 | [diff] [blame^] | 621 | elif t == token.PERCENT: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 622 | node = Mod([node, right]) |
Jeremy Hylton | 7abf520 | 2001-08-29 18:12:30 +0000 | [diff] [blame^] | 623 | elif t == token.DOUBLESLASH: |
| 624 | node = FloorDiv([node, right]) |
| 625 | else: |
| 626 | raise ValueError, "unexpected token: %s" % t |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 627 | node.lineno = nodelist[1][2] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 628 | return node |
| 629 | |
| 630 | def factor(self, nodelist): |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 631 | elt = nodelist[0] |
| 632 | t = elt[0] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 633 | node = self.com_node(nodelist[-1]) |
| 634 | if t == token.PLUS: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 635 | node = UnaryAdd(node) |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 636 | node.lineno = elt[2] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 637 | elif t == token.MINUS: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 638 | node = UnarySub(node) |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 639 | node.lineno = elt[2] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 640 | elif t == token.TILDE: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 641 | node = Invert(node) |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 642 | node.lineno = elt[2] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 643 | return node |
| 644 | |
| 645 | def power(self, nodelist): |
| 646 | # power: atom trailer* ('**' factor)* |
| 647 | node = self.com_node(nodelist[0]) |
| 648 | for i in range(1, len(nodelist)): |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 649 | elt = nodelist[i] |
| 650 | if elt[0] == token.DOUBLESTAR: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 651 | n = Power([node, self.com_node(nodelist[i+1])]) |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 652 | n.lineno = elt[2] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 653 | return n |
| 654 | |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 655 | node = self.com_apply_trailer(node, elt) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 656 | |
| 657 | return node |
| 658 | |
| 659 | def atom(self, nodelist): |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 660 | return self._atom_dispatch[nodelist[0][0]](nodelist) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 661 | |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 662 | def atom_lpar(self, nodelist): |
| 663 | if nodelist[1][0] == token.RPAR: |
| 664 | n = Tuple(()) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 665 | n.lineno = nodelist[0][2] |
| 666 | return n |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 667 | return self.com_node(nodelist[1]) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 668 | |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 669 | def atom_lsqb(self, nodelist): |
| 670 | if nodelist[1][0] == token.RSQB: |
| 671 | n = List(()) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 672 | n.lineno = nodelist[0][2] |
| 673 | return n |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 674 | return self.com_list_constructor(nodelist[1]) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 675 | |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 676 | def atom_lbrace(self, nodelist): |
| 677 | if nodelist[1][0] == token.RBRACE: |
| 678 | return Dict(()) |
| 679 | return self.com_dictmaker(nodelist[1]) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 680 | |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 681 | def atom_backquote(self, nodelist): |
| 682 | n = Backquote(self.com_node(nodelist[1])) |
| 683 | n.lineno = nodelist[0][2] |
| 684 | return n |
| 685 | |
| 686 | def atom_number(self, nodelist): |
| 687 | ### need to verify this matches compile.c |
| 688 | k = eval(nodelist[0][1]) |
| 689 | n = Const(k) |
| 690 | n.lineno = nodelist[0][2] |
| 691 | return n |
| 692 | |
| 693 | def atom_string(self, nodelist): |
| 694 | ### need to verify this matches compile.c |
| 695 | k = '' |
| 696 | for node in nodelist: |
| 697 | k = k + eval(node[1]) |
| 698 | n = Const(k) |
| 699 | n.lineno = nodelist[0][2] |
| 700 | return n |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 701 | |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 702 | def atom_name(self, nodelist): |
| 703 | ### any processing to do? |
| 704 | n = Name(nodelist[0][1]) |
| 705 | n.lineno = nodelist[0][2] |
| 706 | return n |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 707 | |
| 708 | # -------------------------------------------------------------- |
| 709 | # |
| 710 | # INTERNAL PARSING UTILITIES |
| 711 | # |
| 712 | |
Jeremy Hylton | 7e30c9b | 2001-08-27 21:02:51 +0000 | [diff] [blame] | 713 | # The use of com_node() introduces a lot of extra stack frames, |
| 714 | # enough to cause a stack overflow compiling test.test_parser with |
| 715 | # the standard interpreter recursionlimit. The com_node() is a |
| 716 | # convenience function that hides the dispatch details, but comes |
| 717 | # at a very high cost. It is more efficient to dispatch directly |
| 718 | # in the callers. In these cases, use lookup_node() and call the |
| 719 | # dispatched node directly. |
| 720 | |
| 721 | def lookup_node(self, node): |
| 722 | return self._dispatch[node[0]] |
| 723 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 724 | def com_node(self, node): |
| 725 | # Note: compile.c has handling in com_node for del_stmt, pass_stmt, |
| 726 | # break_stmt, stmt, small_stmt, flow_stmt, simple_stmt, |
| 727 | # and compound_stmt. |
| 728 | # We'll just dispatch them. |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 729 | return self._dispatch[node[0]](node[1:]) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 730 | |
Jeremy Hylton | 42a0830 | 2001-04-09 04:27:12 +0000 | [diff] [blame] | 731 | def com_NEWLINE(self, *args): |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 732 | # A ';' at the end of a line can make a NEWLINE token appear |
| 733 | # here, Render it harmless. (genc discards ('discard', |
| 734 | # ('const', xxxx)) Nodes) |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 735 | return Discard(Const(None)) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 736 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 737 | def com_arglist(self, nodelist): |
| 738 | # varargslist: |
| 739 | # (fpdef ['=' test] ',')* ('*' NAME [',' ('**'|'*' '*') NAME] |
| 740 | # | fpdef ['=' test] (',' fpdef ['=' test])* [','] |
| 741 | # | ('**'|'*' '*') NAME) |
| 742 | # fpdef: NAME | '(' fplist ')' |
| 743 | # fplist: fpdef (',' fpdef)* [','] |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 744 | names = [] |
| 745 | defaults = [] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 746 | flags = 0 |
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 = 0 |
| 749 | while i < len(nodelist): |
| 750 | node = nodelist[i] |
| 751 | if node[0] == token.STAR or node[0] == token.DOUBLESTAR: |
| 752 | if node[0] == token.STAR: |
| 753 | node = nodelist[i+1] |
| 754 | if node[0] == token.NAME: |
| 755 | names.append(node[1]) |
| 756 | flags = flags | CO_VARARGS |
| 757 | i = i + 3 |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 758 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 759 | if i < len(nodelist): |
| 760 | # should be DOUBLESTAR or STAR STAR |
Jeremy Hylton | 7abf520 | 2001-08-29 18:12:30 +0000 | [diff] [blame^] | 761 | t = nodelist[i][0] |
| 762 | if t == token.DOUBLESTAR: |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 763 | node = nodelist[i+1] |
Jeremy Hylton | 7abf520 | 2001-08-29 18:12:30 +0000 | [diff] [blame^] | 764 | elif t == token.STARSTAR: |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 765 | node = nodelist[i+2] |
Jeremy Hylton | 7abf520 | 2001-08-29 18:12:30 +0000 | [diff] [blame^] | 766 | else: |
| 767 | raise ValueError, "unexpected token: %s" % t |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 768 | names.append(node[1]) |
| 769 | flags = flags | CO_VARKEYWORDS |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 770 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 771 | break |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 772 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 773 | # fpdef: NAME | '(' fplist ')' |
| 774 | names.append(self.com_fpdef(node)) |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 775 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 776 | i = i + 1 |
| 777 | if i >= len(nodelist): |
| 778 | break |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 779 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 780 | if nodelist[i][0] == token.EQUAL: |
| 781 | defaults.append(self.com_node(nodelist[i + 1])) |
| 782 | i = i + 2 |
| 783 | elif len(defaults): |
| 784 | # Treat "(a=1, b)" as "(a=1, b=None)" |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 785 | defaults.append(Const(None)) |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 786 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 787 | i = i + 1 |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 788 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 789 | return names, defaults, flags |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 790 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 791 | def com_fpdef(self, node): |
| 792 | # fpdef: NAME | '(' fplist ')' |
| 793 | if node[1][0] == token.LPAR: |
| 794 | return self.com_fplist(node[2]) |
| 795 | return node[1][1] |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 796 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 797 | def com_fplist(self, node): |
| 798 | # fplist: fpdef (',' fpdef)* [','] |
| 799 | if len(node) == 2: |
| 800 | return self.com_fpdef(node[1]) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 801 | list = [] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 802 | for i in range(1, len(node), 2): |
| 803 | list.append(self.com_fpdef(node[i])) |
| 804 | return tuple(list) |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 805 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 806 | def com_dotted_name(self, node): |
| 807 | # String together the dotted names and return the string |
| 808 | name = "" |
| 809 | for n in node: |
| 810 | if type(n) == type(()) and n[0] == 1: |
| 811 | name = name + n[1] + '.' |
| 812 | return name[:-1] |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 813 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 814 | def com_dotted_as_name(self, node): |
| 815 | dot = self.com_dotted_name(node[1]) |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 816 | if len(node) <= 2: |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 817 | return dot, None |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 818 | if node[0] == symbol.dotted_name: |
| 819 | pass |
| 820 | else: |
| 821 | assert node[2][1] == 'as' |
| 822 | assert node[3][0] == token.NAME |
| 823 | return dot, node[3][1] |
Jeremy Hylton | 2051608 | 2000-09-01 20:33:26 +0000 | [diff] [blame] | 824 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 825 | def com_import_as_name(self, node): |
Jeremy Hylton | 42a0830 | 2001-04-09 04:27:12 +0000 | [diff] [blame] | 826 | if node[0] == token.STAR: |
Jeremy Hylton | 4e1be72 | 2000-10-12 20:23:23 +0000 | [diff] [blame] | 827 | return '*', None |
Jeremy Hylton | 42a0830 | 2001-04-09 04:27:12 +0000 | [diff] [blame] | 828 | assert node[0] == symbol.import_as_name |
| 829 | node = node[1:] |
| 830 | if len(node) == 1: |
| 831 | assert node[0][0] == token.NAME |
| 832 | return node[0][1], None |
| 833 | |
| 834 | assert node[1][1] == 'as', node |
| 835 | assert node[2][0] == token.NAME |
| 836 | return node[0][1], node[2][1] |
Jeremy Hylton | 2051608 | 2000-09-01 20:33:26 +0000 | [diff] [blame] | 837 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 838 | def com_bases(self, node): |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 839 | bases = [] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 840 | for i in range(1, len(node), 2): |
| 841 | bases.append(self.com_node(node[i])) |
| 842 | return bases |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 843 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 844 | def com_try_finally(self, nodelist): |
| 845 | # try_fin_stmt: "try" ":" suite "finally" ":" suite |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 846 | n = TryFinally(self.com_node(nodelist[2]), |
| 847 | self.com_node(nodelist[5])) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 848 | n.lineno = nodelist[0][2] |
| 849 | return n |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 850 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 851 | def com_try_except(self, nodelist): |
| 852 | # try_except: 'try' ':' suite (except_clause ':' suite)* ['else' suite] |
| 853 | #tryexcept: [TryNode, [except_clauses], elseNode)] |
| 854 | stmt = self.com_node(nodelist[2]) |
| 855 | clauses = [] |
| 856 | elseNode = None |
| 857 | for i in range(3, len(nodelist), 3): |
| 858 | node = nodelist[i] |
| 859 | if node[0] == symbol.except_clause: |
| 860 | # except_clause: 'except' [expr [',' expr]] */ |
| 861 | if len(node) > 2: |
| 862 | expr1 = self.com_node(node[2]) |
| 863 | if len(node) > 4: |
| 864 | expr2 = self.com_assign(node[4], OP_ASSIGN) |
| 865 | else: |
| 866 | expr2 = None |
| 867 | else: |
| 868 | expr1 = expr2 = None |
| 869 | clauses.append((expr1, expr2, self.com_node(nodelist[i+2]))) |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 870 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 871 | if node[0] == token.NAME: |
| 872 | elseNode = self.com_node(nodelist[i+2]) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 873 | n = TryExcept(self.com_node(nodelist[2]), clauses, elseNode) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 874 | n.lineno = nodelist[0][2] |
| 875 | return n |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 876 | |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 877 | def com_augassign_op(self, node): |
| 878 | assert node[0] == symbol.augassign |
| 879 | return node[1] |
| 880 | |
| 881 | def com_augassign(self, node): |
| 882 | """Return node suitable for lvalue of augmented assignment |
| 883 | |
| 884 | Names, slices, and attributes are the only allowable nodes. |
| 885 | """ |
| 886 | l = self.com_node(node) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 887 | if l.__class__ in (Name, Slice, Subscript, Getattr): |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 888 | return l |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 889 | raise SyntaxError, "can't assign to %s" % l.__class__.__name__ |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 890 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 891 | def com_assign(self, node, assigning): |
| 892 | # return a node suitable for use as an "lvalue" |
| 893 | # loop to avoid trivial recursion |
| 894 | while 1: |
| 895 | t = node[0] |
| 896 | if t == symbol.exprlist or t == symbol.testlist: |
| 897 | if len(node) > 2: |
| 898 | return self.com_assign_tuple(node, assigning) |
| 899 | node = node[1] |
| 900 | elif t in _assign_types: |
| 901 | if len(node) > 2: |
| 902 | raise SyntaxError, "can't assign to operator" |
| 903 | node = node[1] |
| 904 | elif t == symbol.power: |
| 905 | if node[1][0] != symbol.atom: |
| 906 | raise SyntaxError, "can't assign to operator" |
| 907 | if len(node) > 2: |
| 908 | primary = self.com_node(node[1]) |
| 909 | for i in range(2, len(node)-1): |
| 910 | ch = node[i] |
| 911 | if ch[0] == token.DOUBLESTAR: |
| 912 | raise SyntaxError, "can't assign to operator" |
| 913 | primary = self.com_apply_trailer(primary, ch) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 914 | return self.com_assign_trailer(primary, node[-1], |
| 915 | assigning) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 916 | node = node[1] |
| 917 | elif t == symbol.atom: |
| 918 | t = node[1][0] |
| 919 | if t == token.LPAR: |
| 920 | node = node[2] |
| 921 | if node[0] == token.RPAR: |
| 922 | raise SyntaxError, "can't assign to ()" |
| 923 | elif t == token.LSQB: |
| 924 | node = node[2] |
| 925 | if node[0] == token.RSQB: |
| 926 | raise SyntaxError, "can't assign to []" |
| 927 | return self.com_assign_list(node, assigning) |
| 928 | elif t == token.NAME: |
| 929 | return self.com_assign_name(node[1], assigning) |
| 930 | else: |
| 931 | raise SyntaxError, "can't assign to literal" |
| 932 | else: |
| 933 | raise SyntaxError, "bad assignment" |
| 934 | |
| 935 | def com_assign_tuple(self, node, assigning): |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 936 | assigns = [] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 937 | for i in range(1, len(node), 2): |
| 938 | assigns.append(self.com_assign(node[i], assigning)) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 939 | return AssTuple(assigns) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 940 | |
| 941 | def com_assign_list(self, node, assigning): |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 942 | assigns = [] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 943 | for i in range(1, len(node), 2): |
| 944 | assigns.append(self.com_assign(node[i], assigning)) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 945 | return AssList(assigns) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 946 | |
| 947 | def com_assign_name(self, node, assigning): |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 948 | n = AssName(node[1], assigning) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 949 | n.lineno = node[2] |
| 950 | return n |
| 951 | |
| 952 | def com_assign_trailer(self, primary, node, assigning): |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 953 | t = node[1][0] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 954 | if t == token.DOT: |
| 955 | return self.com_assign_attr(primary, node[2], assigning) |
| 956 | if t == token.LSQB: |
| 957 | return self.com_subscriptlist(primary, node[2], assigning) |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 958 | if t == token.LPAR: |
| 959 | raise SyntaxError, "can't assign to function call" |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 960 | raise SyntaxError, "unknown trailer type: %s" % t |
| 961 | |
| 962 | def com_assign_attr(self, primary, node, assigning): |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 963 | return AssAttr(primary, node[1], assigning) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 964 | |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 965 | def com_binary(self, constructor, nodelist): |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 966 | "Compile 'NODE (OP NODE)*' into (type, [ node1, ..., nodeN ])." |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 967 | l = len(nodelist) |
| 968 | if l == 1: |
Jeremy Hylton | 7e30c9b | 2001-08-27 21:02:51 +0000 | [diff] [blame] | 969 | n = nodelist[0] |
| 970 | return self.lookup_node(n)(n[1:]) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 971 | items = [] |
| 972 | for i in range(0, l, 2): |
Jeremy Hylton | 7e30c9b | 2001-08-27 21:02:51 +0000 | [diff] [blame] | 973 | n = nodelist[i] |
| 974 | items.append(self.lookup_node(n)(n[1:])) |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 975 | return constructor(items) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 976 | |
| 977 | def com_stmt(self, node): |
Jeremy Hylton | 7e30c9b | 2001-08-27 21:02:51 +0000 | [diff] [blame] | 978 | result = self.lookup_node(node)(node[1:]) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 979 | assert result is not None |
| 980 | if isinstance(result, Stmt): |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 981 | return result |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 982 | return Stmt([result]) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 983 | |
| 984 | def com_append_stmt(self, stmts, node): |
| 985 | result = self.com_node(node) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 986 | assert result is not None |
| 987 | if isinstance(result, Stmt): |
| 988 | stmts.extend(result.nodes) |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 989 | else: |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 990 | stmts.append(result) |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 991 | |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 992 | if hasattr(symbol, 'list_for'): |
| 993 | def com_list_constructor(self, nodelist): |
| 994 | # listmaker: test ( list_for | (',' test)* [','] ) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 995 | values = [] |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 996 | for i in range(1, len(nodelist)): |
| 997 | if nodelist[i][0] == symbol.list_for: |
| 998 | assert len(nodelist[i:]) == 1 |
| 999 | return self.com_list_comprehension(values[0], |
| 1000 | nodelist[i]) |
| 1001 | elif nodelist[i][0] == token.COMMA: |
| 1002 | continue |
| 1003 | values.append(self.com_node(nodelist[i])) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1004 | return List(values) |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 1005 | |
| 1006 | def com_list_comprehension(self, expr, node): |
| 1007 | # list_iter: list_for | list_if |
| 1008 | # list_for: 'for' exprlist 'in' testlist [list_iter] |
| 1009 | # list_if: 'if' test [list_iter] |
Jeremy Hylton | 42a0830 | 2001-04-09 04:27:12 +0000 | [diff] [blame] | 1010 | |
| 1011 | # XXX should raise SyntaxError for assignment |
| 1012 | |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 1013 | lineno = node[1][2] |
| 1014 | fors = [] |
| 1015 | while node: |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 1016 | t = node[1][1] |
| 1017 | if t == 'for': |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 1018 | assignNode = self.com_assign(node[2], OP_ASSIGN) |
| 1019 | listNode = self.com_node(node[4]) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1020 | newfor = ListCompFor(assignNode, listNode, []) |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 1021 | newfor.lineno = node[1][2] |
| 1022 | fors.append(newfor) |
| 1023 | if len(node) == 5: |
| 1024 | node = None |
| 1025 | else: |
| 1026 | node = self.com_list_iter(node[5]) |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 1027 | elif t == 'if': |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 1028 | test = self.com_node(node[2]) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1029 | newif = ListCompIf(test) |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 1030 | newif.lineno = node[1][2] |
| 1031 | newfor.ifs.append(newif) |
| 1032 | if len(node) == 3: |
| 1033 | node = None |
| 1034 | else: |
| 1035 | node = self.com_list_iter(node[3]) |
| 1036 | else: |
| 1037 | raise SyntaxError, \ |
| 1038 | ("unexpected list comprehension element: %s %d" |
| 1039 | % (node, lineno)) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1040 | n = ListComp(expr, fors) |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 1041 | n.lineno = lineno |
| 1042 | return n |
| 1043 | |
| 1044 | def com_list_iter(self, node): |
| 1045 | assert node[0] == symbol.list_iter |
| 1046 | return node[1] |
| 1047 | else: |
| 1048 | def com_list_constructor(self, nodelist): |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1049 | values = [] |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 1050 | for i in range(1, len(nodelist), 2): |
| 1051 | values.append(self.com_node(nodelist[i])) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1052 | return List(values) |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1053 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1054 | def com_dictmaker(self, nodelist): |
| 1055 | # dictmaker: test ':' test (',' test ':' value)* [','] |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1056 | items = [] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1057 | for i in range(1, len(nodelist), 4): |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 1058 | items.append((self.com_node(nodelist[i]), |
| 1059 | self.com_node(nodelist[i+2]))) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1060 | return Dict(items) |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1061 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1062 | def com_apply_trailer(self, primaryNode, nodelist): |
| 1063 | t = nodelist[1][0] |
| 1064 | if t == token.LPAR: |
| 1065 | return self.com_call_function(primaryNode, nodelist[2]) |
| 1066 | if t == token.DOT: |
| 1067 | return self.com_select_member(primaryNode, nodelist[2]) |
| 1068 | if t == token.LSQB: |
| 1069 | return self.com_subscriptlist(primaryNode, nodelist[2], OP_APPLY) |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1070 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1071 | raise SyntaxError, 'unknown node type: %s' % t |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1072 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1073 | def com_select_member(self, primaryNode, nodelist): |
| 1074 | if nodelist[0] != token.NAME: |
| 1075 | raise SyntaxError, "member must be a name" |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1076 | n = Getattr(primaryNode, nodelist[1]) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1077 | n.lineno = nodelist[2] |
| 1078 | return n |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1079 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1080 | def com_call_function(self, primaryNode, nodelist): |
| 1081 | if nodelist[0] == token.RPAR: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1082 | return CallFunc(primaryNode, []) |
| 1083 | args = [] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1084 | kw = 0 |
| 1085 | len_nodelist = len(nodelist) |
| 1086 | for i in range(1, len_nodelist, 2): |
| 1087 | node = nodelist[i] |
| 1088 | if node[0] == token.STAR or node[0] == token.DOUBLESTAR: |
| 1089 | break |
| 1090 | kw, result = self.com_argument(node, kw) |
| 1091 | args.append(result) |
Jeremy Hylton | be317e6 | 2000-05-02 22:32:59 +0000 | [diff] [blame] | 1092 | else: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1093 | # No broken by star arg, so skip the last one we processed. |
| 1094 | i = i + 1 |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1095 | if i < len_nodelist and nodelist[i][0] == token.COMMA: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1096 | # need to accept an application that looks like "f(a, b,)" |
| 1097 | i = i + 1 |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1098 | star_node = dstar_node = None |
| 1099 | while i < len_nodelist: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1100 | tok = nodelist[i] |
| 1101 | ch = nodelist[i+1] |
| 1102 | i = i + 3 |
| 1103 | if tok[0]==token.STAR: |
| 1104 | if star_node is not None: |
| 1105 | raise SyntaxError, 'already have the varargs indentifier' |
| 1106 | star_node = self.com_node(ch) |
| 1107 | elif tok[0]==token.DOUBLESTAR: |
| 1108 | if dstar_node is not None: |
| 1109 | raise SyntaxError, 'already have the kwargs indentifier' |
| 1110 | dstar_node = self.com_node(ch) |
| 1111 | else: |
| 1112 | raise SyntaxError, 'unknown node type: %s' % tok |
Jeremy Hylton | be317e6 | 2000-05-02 22:32:59 +0000 | [diff] [blame] | 1113 | |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1114 | return CallFunc(primaryNode, args, star_node, dstar_node) |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1115 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1116 | def com_argument(self, nodelist, kw): |
| 1117 | if len(nodelist) == 2: |
| 1118 | if kw: |
| 1119 | raise SyntaxError, "non-keyword arg after keyword arg" |
| 1120 | return 0, self.com_node(nodelist[1]) |
| 1121 | result = self.com_node(nodelist[3]) |
| 1122 | n = nodelist[1] |
| 1123 | while len(n) == 2 and n[0] != token.NAME: |
| 1124 | n = n[1] |
| 1125 | if n[0] != token.NAME: |
| 1126 | raise SyntaxError, "keyword can't be an expression (%s)"%n[0] |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1127 | node = Keyword(n[1], result) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1128 | node.lineno = n[2] |
| 1129 | return 1, node |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1130 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1131 | def com_subscriptlist(self, primary, nodelist, assigning): |
| 1132 | # slicing: simple_slicing | extended_slicing |
| 1133 | # simple_slicing: primary "[" short_slice "]" |
| 1134 | # extended_slicing: primary "[" slice_list "]" |
| 1135 | # slice_list: slice_item ("," slice_item)* [","] |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1136 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1137 | # backwards compat slice for '[i:j]' |
| 1138 | if len(nodelist) == 2: |
| 1139 | sub = nodelist[1] |
| 1140 | if (sub[1][0] == token.COLON or \ |
| 1141 | (len(sub) > 2 and sub[2][0] == token.COLON)) and \ |
| 1142 | sub[-1][0] != symbol.sliceop: |
| 1143 | return self.com_slice(primary, sub, assigning) |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1144 | |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1145 | subscripts = [] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1146 | for i in range(1, len(nodelist), 2): |
| 1147 | subscripts.append(self.com_subscript(nodelist[i])) |
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 Subscript(primary, assigning, subscripts) |
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_subscript(self, node): |
| 1152 | # slice_item: expression | proper_slice | ellipsis |
| 1153 | ch = node[1] |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 1154 | t = ch[0] |
| 1155 | if t == token.DOT and node[2][0] == token.DOT: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1156 | return Ellipsis() |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 1157 | if t == token.COLON or len(node) > 2: |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1158 | return self.com_sliceobj(node) |
| 1159 | return self.com_node(ch) |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1160 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1161 | def com_sliceobj(self, node): |
| 1162 | # proper_slice: short_slice | long_slice |
| 1163 | # short_slice: [lower_bound] ":" [upper_bound] |
| 1164 | # long_slice: short_slice ":" [stride] |
| 1165 | # lower_bound: expression |
| 1166 | # upper_bound: expression |
| 1167 | # stride: expression |
| 1168 | # |
| 1169 | # Note: a stride may be further slicing... |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1170 | |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1171 | items = [] |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1172 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1173 | if node[1][0] == token.COLON: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1174 | items.append(Const(None)) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1175 | i = 2 |
| 1176 | else: |
| 1177 | items.append(self.com_node(node[1])) |
| 1178 | # i == 2 is a COLON |
| 1179 | i = 3 |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1180 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1181 | if i < len(node) and node[i][0] == symbol.test: |
| 1182 | items.append(self.com_node(node[i])) |
| 1183 | i = i + 1 |
| 1184 | else: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1185 | items.append(Const(None)) |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1186 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1187 | # a short_slice has been built. look for long_slice now by looking |
| 1188 | # for strides... |
| 1189 | for j in range(i, len(node)): |
| 1190 | ch = node[j] |
| 1191 | if len(ch) == 2: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1192 | items.append(Const(None)) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1193 | else: |
| 1194 | items.append(self.com_node(ch[2])) |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1195 | |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1196 | return Sliceobj(items) |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1197 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1198 | def com_slice(self, primary, node, assigning): |
| 1199 | # short_slice: [lower_bound] ":" [upper_bound] |
| 1200 | lower = upper = None |
| 1201 | if len(node) == 3: |
| 1202 | if node[1][0] == token.COLON: |
| 1203 | upper = self.com_node(node[2]) |
| 1204 | else: |
| 1205 | lower = self.com_node(node[1]) |
| 1206 | elif len(node) == 4: |
| 1207 | lower = self.com_node(node[1]) |
| 1208 | upper = self.com_node(node[3]) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1209 | return Slice(primary, assigning, lower, upper) |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1210 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1211 | def get_docstring(self, node, n=None): |
| 1212 | if n is None: |
| 1213 | n = node[0] |
| 1214 | node = node[1:] |
| 1215 | if n == symbol.suite: |
| 1216 | if len(node) == 1: |
| 1217 | return self.get_docstring(node[0]) |
| 1218 | for sub in node: |
| 1219 | if sub[0] == symbol.stmt: |
| 1220 | return self.get_docstring(sub) |
| 1221 | return None |
| 1222 | if n == symbol.file_input: |
| 1223 | for sub in node: |
| 1224 | if sub[0] == symbol.stmt: |
| 1225 | return self.get_docstring(sub) |
| 1226 | return None |
| 1227 | if n == symbol.atom: |
| 1228 | if node[0][0] == token.STRING: |
| 1229 | s = '' |
| 1230 | for t in node: |
| 1231 | s = s + eval(t[1]) |
| 1232 | return s |
| 1233 | return None |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1234 | if n == symbol.stmt or n == symbol.simple_stmt \ |
| 1235 | or n == symbol.small_stmt: |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1236 | return self.get_docstring(node[0]) |
| 1237 | if n in _doc_nodes and len(node) == 1: |
| 1238 | return self.get_docstring(node[0]) |
| 1239 | return None |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1240 | |
| 1241 | |
| 1242 | _doc_nodes = [ |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1243 | symbol.expr_stmt, |
| 1244 | symbol.testlist, |
| 1245 | symbol.test, |
| 1246 | symbol.and_test, |
| 1247 | symbol.not_test, |
| 1248 | symbol.comparison, |
| 1249 | symbol.expr, |
| 1250 | symbol.xor_expr, |
| 1251 | symbol.and_expr, |
| 1252 | symbol.shift_expr, |
| 1253 | symbol.arith_expr, |
| 1254 | symbol.term, |
| 1255 | symbol.factor, |
| 1256 | symbol.power, |
| 1257 | ] |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1258 | |
| 1259 | # comp_op: '<' | '>' | '=' | '>=' | '<=' | '<>' | '!=' | '==' |
| 1260 | # | 'in' | 'not' 'in' | 'is' | 'is' 'not' |
| 1261 | _cmp_types = { |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1262 | token.LESS : '<', |
| 1263 | token.GREATER : '>', |
| 1264 | token.EQEQUAL : '==', |
| 1265 | token.EQUAL : '==', |
| 1266 | token.LESSEQUAL : '<=', |
| 1267 | token.GREATEREQUAL : '>=', |
| 1268 | token.NOTEQUAL : '!=', |
| 1269 | } |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1270 | |
| 1271 | _legal_node_types = [ |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1272 | symbol.funcdef, |
| 1273 | symbol.classdef, |
| 1274 | symbol.stmt, |
| 1275 | symbol.small_stmt, |
| 1276 | symbol.flow_stmt, |
| 1277 | symbol.simple_stmt, |
| 1278 | symbol.compound_stmt, |
| 1279 | symbol.expr_stmt, |
| 1280 | symbol.print_stmt, |
| 1281 | symbol.del_stmt, |
| 1282 | symbol.pass_stmt, |
| 1283 | symbol.break_stmt, |
| 1284 | symbol.continue_stmt, |
| 1285 | symbol.return_stmt, |
| 1286 | symbol.raise_stmt, |
| 1287 | symbol.import_stmt, |
| 1288 | symbol.global_stmt, |
| 1289 | symbol.exec_stmt, |
| 1290 | symbol.assert_stmt, |
| 1291 | symbol.if_stmt, |
| 1292 | symbol.while_stmt, |
| 1293 | symbol.for_stmt, |
| 1294 | symbol.try_stmt, |
| 1295 | symbol.suite, |
| 1296 | symbol.testlist, |
| 1297 | symbol.test, |
| 1298 | symbol.and_test, |
| 1299 | symbol.not_test, |
| 1300 | symbol.comparison, |
| 1301 | symbol.exprlist, |
| 1302 | symbol.expr, |
| 1303 | symbol.xor_expr, |
| 1304 | symbol.and_expr, |
| 1305 | symbol.shift_expr, |
| 1306 | symbol.arith_expr, |
| 1307 | symbol.term, |
| 1308 | symbol.factor, |
| 1309 | symbol.power, |
| 1310 | symbol.atom, |
| 1311 | ] |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1312 | |
Jeremy Hylton | 7e30c9b | 2001-08-27 21:02:51 +0000 | [diff] [blame] | 1313 | if hasattr(symbol, 'yield_stmt'): |
| 1314 | _legal_node_types.append(symbol.yield_stmt) |
| 1315 | |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1316 | _assign_types = [ |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1317 | symbol.test, |
| 1318 | symbol.and_test, |
| 1319 | symbol.not_test, |
| 1320 | symbol.comparison, |
| 1321 | symbol.expr, |
| 1322 | symbol.xor_expr, |
| 1323 | symbol.and_expr, |
| 1324 | symbol.shift_expr, |
| 1325 | symbol.arith_expr, |
| 1326 | symbol.term, |
| 1327 | symbol.factor, |
| 1328 | ] |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 1329 | |
| 1330 | import types |
| 1331 | _names = {} |
| 1332 | for k, v in symbol.sym_name.items(): |
| 1333 | _names[k] = v |
| 1334 | for k, v in token.tok_name.items(): |
| 1335 | _names[k] = v |
| 1336 | |
| 1337 | def debug_tree(tree): |
| 1338 | l = [] |
| 1339 | for elt in tree: |
| 1340 | if type(elt) == types.IntType: |
| 1341 | l.append(_names.get(elt, elt)) |
| 1342 | elif type(elt) == types.StringType: |
| 1343 | l.append(elt) |
| 1344 | else: |
| 1345 | l.append(debug_tree(elt)) |
| 1346 | return l |