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 |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 31 | import sys |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 32 | |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 33 | error = 'walker.error' |
| 34 | |
Jeremy Hylton | 9605c11 | 2000-02-08 18:57:32 +0000 | [diff] [blame] | 35 | from consts import CO_VARARGS, CO_VARKEYWORDS |
| 36 | from consts import OP_ASSIGN, OP_DELETE, OP_APPLY |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 37 | |
Jeremy Hylton | fa974a9 | 2000-03-06 18:50:48 +0000 | [diff] [blame] | 38 | def parseFile(path): |
| 39 | f = open(path) |
Jeremy Hylton | accb62b | 2002-12-31 18:17:44 +0000 | [diff] [blame] | 40 | # XXX The parser API tolerates files without a trailing newline, |
| 41 | # but not strings without a trailing newline. Always add an extra |
| 42 | # newline to the file contents, since we're going through the string |
| 43 | # version of the API. |
| 44 | src = f.read() + "\n" |
Jeremy Hylton | fa974a9 | 2000-03-06 18:50:48 +0000 | [diff] [blame] | 45 | f.close() |
| 46 | return parse(src) |
| 47 | |
Jeremy Hylton | 9dca364 | 2001-09-17 21:02:51 +0000 | [diff] [blame] | 48 | def parse(buf, mode="exec"): |
| 49 | if mode == "exec" or mode == "single": |
| 50 | return Transformer().parsesuite(buf) |
| 51 | elif mode == "eval": |
| 52 | return Transformer().parseexpr(buf) |
| 53 | else: |
| 54 | raise ValueError("compile() arg 3 must be" |
| 55 | " 'exec' or 'eval' or 'single'") |
Jeremy Hylton | fa974a9 | 2000-03-06 18:50:48 +0000 | [diff] [blame] | 56 | |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 57 | def asList(nodes): |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 58 | l = [] |
| 59 | for item in nodes: |
| 60 | if hasattr(item, "asList"): |
| 61 | l.append(item.asList()) |
| 62 | else: |
| 63 | if type(item) is type( (None, None) ): |
| 64 | l.append(tuple(asList(item))) |
| 65 | elif type(item) is type( [] ): |
| 66 | l.append(asList(item)) |
| 67 | else: |
| 68 | l.append(item) |
| 69 | return l |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 70 | |
| 71 | def Node(*args): |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 72 | kind = args[0] |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 73 | if nodes.has_key(kind): |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 74 | try: |
Raymond Hettinger | ff41c48 | 2003-04-06 09:01:11 +0000 | [diff] [blame] | 75 | return nodes[kind](*args[1:]) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 76 | except TypeError: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 77 | print nodes[kind], len(args), args |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 78 | raise |
| 79 | else: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 80 | raise error, "Can't find appropriate Node type: %s" % str(args) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 81 | #return apply(ast.Node, args) |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 82 | |
| 83 | class Transformer: |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 84 | """Utility object for transforming Python parse trees. |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 85 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 86 | Exposes the following methods: |
| 87 | tree = transform(ast_tree) |
| 88 | tree = parsesuite(text) |
| 89 | tree = parseexpr(text) |
| 90 | tree = parsefile(fileob | filename) |
| 91 | """ |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 92 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 93 | def __init__(self): |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 94 | self._dispatch = {} |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 95 | for value, name in symbol.sym_name.items(): |
| 96 | if hasattr(self, name): |
| 97 | self._dispatch[value] = getattr(self, name) |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 98 | self._dispatch[token.NEWLINE] = self.com_NEWLINE |
| 99 | self._atom_dispatch = {token.LPAR: self.atom_lpar, |
| 100 | token.LSQB: self.atom_lsqb, |
| 101 | token.LBRACE: self.atom_lbrace, |
| 102 | token.BACKQUOTE: self.atom_backquote, |
| 103 | token.NUMBER: self.atom_number, |
| 104 | token.STRING: self.atom_string, |
| 105 | token.NAME: self.atom_name, |
| 106 | } |
Jeremy Hylton | accb62b | 2002-12-31 18:17:44 +0000 | [diff] [blame] | 107 | self.encoding = None |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 108 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 109 | def transform(self, tree): |
| 110 | """Transform an AST into a modified parse tree.""" |
| 111 | if type(tree) != type(()) and type(tree) != type([]): |
Jeremy Hylton | 7845cf8 | 2001-08-29 20:56:30 +0000 | [diff] [blame] | 112 | tree = parser.ast2tuple(tree, line_info=1) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 113 | return self.compile_node(tree) |
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 parsesuite(self, text): |
| 116 | """Return a modified parse tree for the given suite text.""" |
| 117 | # Hack for handling non-native line endings on non-DOS like OSs. |
Jeremy Hylton | accb62b | 2002-12-31 18:17:44 +0000 | [diff] [blame] | 118 | # this can go now we have universal newlines? |
Neal Norwitz | a312c3a | 2002-06-06 18:30:10 +0000 | [diff] [blame] | 119 | text = text.replace('\x0d', '') |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 120 | return self.transform(parser.suite(text)) |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 121 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 122 | def parseexpr(self, text): |
| 123 | """Return a modified parse tree for the given expression text.""" |
| 124 | return self.transform(parser.expr(text)) |
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 parsefile(self, file): |
| 127 | """Return a modified parse tree for the contents of the given file.""" |
| 128 | if type(file) == type(''): |
| 129 | file = open(file) |
| 130 | return self.parsesuite(file.read()) |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 131 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 132 | # -------------------------------------------------------------- |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 133 | # |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 134 | # PRIVATE METHODS |
| 135 | # |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 136 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 137 | def compile_node(self, node): |
| 138 | ### emit a line-number node? |
| 139 | n = node[0] |
Jeremy Hylton | accb62b | 2002-12-31 18:17:44 +0000 | [diff] [blame] | 140 | |
| 141 | if n == symbol.encoding_decl: |
| 142 | self.encoding = node[2] |
| 143 | node = node[1] |
| 144 | n = node[0] |
Tim Peters | 669454e | 2003-03-07 17:30:48 +0000 | [diff] [blame] | 145 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 146 | if n == symbol.single_input: |
| 147 | return self.single_input(node[1:]) |
| 148 | if n == symbol.file_input: |
| 149 | return self.file_input(node[1:]) |
| 150 | if n == symbol.eval_input: |
| 151 | return self.eval_input(node[1:]) |
| 152 | if n == symbol.lambdef: |
| 153 | return self.lambdef(node[1:]) |
| 154 | if n == symbol.funcdef: |
| 155 | return self.funcdef(node[1:]) |
| 156 | if n == symbol.classdef: |
| 157 | return self.classdef(node[1:]) |
| 158 | |
| 159 | raise error, ('unexpected node type', n) |
| 160 | |
| 161 | def single_input(self, node): |
| 162 | ### do we want to do anything about being "interactive" ? |
| 163 | |
| 164 | # NEWLINE | simple_stmt | compound_stmt NEWLINE |
| 165 | n = node[0][0] |
| 166 | if n != token.NEWLINE: |
| 167 | return self.com_stmt(node[0]) |
| 168 | |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 169 | return Pass() |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 170 | |
| 171 | def file_input(self, nodelist): |
| 172 | doc = self.get_docstring(nodelist, symbol.file_input) |
Jeremy Hylton | ec92734 | 2001-08-18 00:04:31 +0000 | [diff] [blame] | 173 | if doc is not None: |
| 174 | i = 1 |
| 175 | else: |
| 176 | i = 0 |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 177 | stmts = [] |
Jeremy Hylton | ec92734 | 2001-08-18 00:04:31 +0000 | [diff] [blame] | 178 | for node in nodelist[i:]: |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 179 | if node[0] != token.ENDMARKER and node[0] != token.NEWLINE: |
| 180 | self.com_append_stmt(stmts, node) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 181 | return Module(doc, Stmt(stmts)) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 182 | |
| 183 | def eval_input(self, nodelist): |
| 184 | # from the built-in function input() |
| 185 | ### is this sufficient? |
Barry Warsaw | 52acb49 | 2001-12-21 20:04:22 +0000 | [diff] [blame] | 186 | return Expression(self.com_node(nodelist[0])) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 187 | |
Anthony Baxter | c2a5a63 | 2004-08-02 06:10:11 +0000 | [diff] [blame] | 188 | def decorator_name(self, nodelist): |
| 189 | listlen = len(nodelist) |
| 190 | assert listlen >= 1 and listlen % 2 == 1 |
| 191 | |
| 192 | item = self.atom_name(nodelist) |
| 193 | i = 1 |
| 194 | while i < listlen: |
| 195 | assert nodelist[i][0] == token.DOT |
| 196 | assert nodelist[i + 1][0] == token.NAME |
| 197 | item = Getattr(item, nodelist[i + 1][1]) |
| 198 | i += 2 |
| 199 | |
| 200 | return item |
| 201 | |
| 202 | def decorator(self, nodelist): |
| 203 | # '@' dotted_name [ '(' [arglist] ')' ] |
| 204 | assert len(nodelist) in (2, 4, 5) |
| 205 | assert nodelist[0][0] == token.AT |
| 206 | |
| 207 | assert nodelist[1][0] == symbol.dotted_name |
| 208 | funcname = self.decorator_name(nodelist[1][1:]) |
| 209 | |
| 210 | if len(nodelist) > 2: |
| 211 | assert nodelist[2][0] == token.LPAR |
| 212 | expr = self.com_call_function(funcname, nodelist[3]) |
| 213 | else: |
| 214 | expr = funcname |
| 215 | |
| 216 | return expr |
| 217 | |
| 218 | def decorators(self, nodelist): |
| 219 | # decorators: decorator ([NEWLINE] decorator)* NEWLINE |
| 220 | listlen = len(nodelist) |
| 221 | i = 0 |
| 222 | items = [] |
| 223 | while i < listlen: |
| 224 | assert nodelist[i][0] == symbol.decorator |
| 225 | items.append(self.decorator(nodelist[i][1:])) |
| 226 | i += 1 |
| 227 | |
| 228 | if i < listlen and nodelist[i][0] == token.NEWLINE: |
| 229 | i += 1 |
| 230 | return Decorators(items) |
| 231 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 232 | def funcdef(self, nodelist): |
Anthony Baxter | c2a5a63 | 2004-08-02 06:10:11 +0000 | [diff] [blame] | 233 | # -6 -5 -4 -3 -2 -1 |
| 234 | # funcdef: [decorators] 'def' NAME parameters ':' suite |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 235 | # parameters: '(' [varargslist] ')' |
| 236 | |
Anthony Baxter | c2a5a63 | 2004-08-02 06:10:11 +0000 | [diff] [blame] | 237 | if len(nodelist) == 6: |
| 238 | assert nodelist[0][0] == symbol.decorators |
| 239 | decorators = self.decorators(nodelist[0][1:]) |
| 240 | else: |
| 241 | assert len(nodelist) == 5 |
| 242 | decorators = None |
| 243 | |
| 244 | lineno = nodelist[-4][2] |
| 245 | name = nodelist[-4][1] |
| 246 | args = nodelist[-3][2] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 247 | |
| 248 | if args[0] == symbol.varargslist: |
| 249 | names, defaults, flags = self.com_arglist(args[1:]) |
| 250 | else: |
| 251 | names = defaults = () |
| 252 | flags = 0 |
Anthony Baxter | c2a5a63 | 2004-08-02 06:10:11 +0000 | [diff] [blame] | 253 | doc = self.get_docstring(nodelist[-1]) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 254 | |
| 255 | # code for function |
Anthony Baxter | c2a5a63 | 2004-08-02 06:10:11 +0000 | [diff] [blame] | 256 | code = self.com_node(nodelist[-1]) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 257 | |
Jeremy Hylton | a59ac0a | 2000-11-06 03:33:52 +0000 | [diff] [blame] | 258 | if doc is not None: |
| 259 | assert isinstance(code, Stmt) |
| 260 | assert isinstance(code.nodes[0], Discard) |
| 261 | del code.nodes[0] |
Anthony Baxter | c2a5a63 | 2004-08-02 06:10:11 +0000 | [diff] [blame] | 262 | n = Function(decorators, name, names, defaults, flags, doc, code) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 263 | n.lineno = lineno |
| 264 | return n |
| 265 | |
| 266 | def lambdef(self, nodelist): |
| 267 | # lambdef: 'lambda' [varargslist] ':' test |
| 268 | if nodelist[2][0] == symbol.varargslist: |
| 269 | names, defaults, flags = self.com_arglist(nodelist[2][1:]) |
| 270 | else: |
| 271 | names = defaults = () |
| 272 | flags = 0 |
| 273 | |
| 274 | # code for lambda |
| 275 | code = self.com_node(nodelist[-1]) |
| 276 | |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 277 | n = Lambda(names, defaults, flags, code) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 278 | n.lineno = nodelist[1][2] |
| 279 | return n |
| 280 | |
| 281 | def classdef(self, nodelist): |
| 282 | # classdef: 'class' NAME ['(' testlist ')'] ':' suite |
| 283 | |
| 284 | name = nodelist[1][1] |
| 285 | doc = self.get_docstring(nodelist[-1]) |
| 286 | if nodelist[2][0] == token.COLON: |
| 287 | bases = [] |
| 288 | else: |
| 289 | bases = self.com_bases(nodelist[3]) |
| 290 | |
| 291 | # code for class |
| 292 | code = self.com_node(nodelist[-1]) |
| 293 | |
Jeremy Hylton | da8db8c | 2001-08-29 17:19:02 +0000 | [diff] [blame] | 294 | if doc is not None: |
| 295 | assert isinstance(code, Stmt) |
| 296 | assert isinstance(code.nodes[0], Discard) |
| 297 | del code.nodes[0] |
| 298 | |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 299 | n = Class(name, bases, doc, code) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 300 | n.lineno = nodelist[1][2] |
| 301 | return n |
| 302 | |
| 303 | def stmt(self, nodelist): |
| 304 | return self.com_stmt(nodelist[0]) |
| 305 | |
| 306 | small_stmt = stmt |
| 307 | flow_stmt = stmt |
| 308 | compound_stmt = stmt |
| 309 | |
| 310 | def simple_stmt(self, nodelist): |
| 311 | # small_stmt (';' small_stmt)* [';'] NEWLINE |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 312 | stmts = [] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 313 | for i in range(0, len(nodelist), 2): |
| 314 | self.com_append_stmt(stmts, nodelist[i]) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 315 | return Stmt(stmts) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 316 | |
| 317 | def parameters(self, nodelist): |
| 318 | raise error |
| 319 | |
| 320 | def varargslist(self, nodelist): |
| 321 | raise error |
| 322 | |
| 323 | def fpdef(self, nodelist): |
| 324 | raise error |
| 325 | |
| 326 | def fplist(self, nodelist): |
| 327 | raise error |
| 328 | |
| 329 | def dotted_name(self, nodelist): |
| 330 | raise error |
| 331 | |
| 332 | def comp_op(self, nodelist): |
| 333 | raise error |
| 334 | |
| 335 | def trailer(self, nodelist): |
| 336 | raise error |
| 337 | |
| 338 | def sliceop(self, nodelist): |
| 339 | raise error |
| 340 | |
| 341 | def argument(self, nodelist): |
| 342 | raise error |
| 343 | |
| 344 | # -------------------------------------------------------------- |
| 345 | # |
| 346 | # STATEMENT NODES (invoked by com_node()) |
| 347 | # |
| 348 | |
| 349 | def expr_stmt(self, nodelist): |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 350 | # augassign testlist | testlist ('=' testlist)* |
Jeremy Hylton | 7e30c9b | 2001-08-27 21:02:51 +0000 | [diff] [blame] | 351 | en = nodelist[-1] |
| 352 | exprNode = self.lookup_node(en)(en[1:]) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 353 | if len(nodelist) == 1: |
Jeremy Hylton | 4c1f427 | 2001-04-11 16:22:26 +0000 | [diff] [blame] | 354 | n = Discard(exprNode) |
| 355 | n.lineno = exprNode.lineno |
| 356 | return n |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 357 | if nodelist[1][0] == token.EQUAL: |
Martin v. Löwis | 51e234a | 2002-02-28 17:48:48 +0000 | [diff] [blame] | 358 | nodesl = [] |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 359 | for i in range(0, len(nodelist) - 2, 2): |
Martin v. Löwis | 51e234a | 2002-02-28 17:48:48 +0000 | [diff] [blame] | 360 | nodesl.append(self.com_assign(nodelist[i], OP_ASSIGN)) |
| 361 | n = Assign(nodesl, exprNode) |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 362 | n.lineno = nodelist[1][2] |
| 363 | else: |
| 364 | lval = self.com_augassign(nodelist[0]) |
| 365 | op = self.com_augassign_op(nodelist[1]) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 366 | n = AugAssign(lval, op[1], exprNode) |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 367 | n.lineno = op[2] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 368 | return n |
| 369 | |
| 370 | def print_stmt(self, nodelist): |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 371 | # print ([ test (',' test)* [','] ] | '>>' test [ (',' test)+ [','] ]) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 372 | items = [] |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 373 | if len(nodelist) == 1: |
| 374 | start = 1 |
| 375 | dest = None |
| 376 | elif nodelist[1][0] == token.RIGHTSHIFT: |
| 377 | assert len(nodelist) == 3 \ |
| 378 | or nodelist[3][0] == token.COMMA |
| 379 | dest = self.com_node(nodelist[2]) |
| 380 | start = 4 |
| 381 | else: |
| 382 | dest = None |
| 383 | start = 1 |
| 384 | for i in range(start, len(nodelist), 2): |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 385 | items.append(self.com_node(nodelist[i])) |
| 386 | if nodelist[-1][0] == token.COMMA: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 387 | n = Print(items, dest) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 388 | n.lineno = nodelist[0][2] |
| 389 | return n |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 390 | n = Printnl(items, dest) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 391 | n.lineno = nodelist[0][2] |
| 392 | return n |
| 393 | |
| 394 | def del_stmt(self, nodelist): |
| 395 | return self.com_assign(nodelist[1], OP_DELETE) |
| 396 | |
| 397 | def pass_stmt(self, nodelist): |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 398 | n = Pass() |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 399 | n.lineno = nodelist[0][2] |
| 400 | return n |
| 401 | |
| 402 | def break_stmt(self, nodelist): |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 403 | n = Break() |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 404 | n.lineno = nodelist[0][2] |
| 405 | return n |
| 406 | |
| 407 | def continue_stmt(self, nodelist): |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 408 | n = Continue() |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 409 | n.lineno = nodelist[0][2] |
| 410 | return n |
| 411 | |
| 412 | def return_stmt(self, nodelist): |
| 413 | # return: [testlist] |
| 414 | if len(nodelist) < 2: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 415 | n = Return(Const(None)) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 416 | n.lineno = nodelist[0][2] |
| 417 | return n |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 418 | n = Return(self.com_node(nodelist[1])) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 419 | n.lineno = nodelist[0][2] |
| 420 | return n |
| 421 | |
Jeremy Hylton | ec92734 | 2001-08-18 00:04:31 +0000 | [diff] [blame] | 422 | def yield_stmt(self, nodelist): |
| 423 | n = Yield(self.com_node(nodelist[1])) |
| 424 | n.lineno = nodelist[0][2] |
| 425 | return n |
| 426 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 427 | def raise_stmt(self, nodelist): |
| 428 | # raise: [test [',' test [',' test]]] |
| 429 | if len(nodelist) > 5: |
| 430 | expr3 = self.com_node(nodelist[5]) |
| 431 | else: |
| 432 | expr3 = None |
| 433 | if len(nodelist) > 3: |
| 434 | expr2 = self.com_node(nodelist[3]) |
| 435 | else: |
| 436 | expr2 = None |
| 437 | if len(nodelist) > 1: |
| 438 | expr1 = self.com_node(nodelist[1]) |
| 439 | else: |
| 440 | expr1 = None |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 441 | n = Raise(expr1, expr2, expr3) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 442 | n.lineno = nodelist[0][2] |
| 443 | return n |
| 444 | |
| 445 | def import_stmt(self, nodelist): |
| 446 | # import_stmt: 'import' dotted_as_name (',' dotted_as_name)* | |
| 447 | # from: 'from' dotted_name 'import' |
| 448 | # ('*' | import_as_name (',' import_as_name)*) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 449 | if nodelist[0][1] == 'from': |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 450 | names = [] |
| 451 | if nodelist[3][0] == token.NAME: |
| 452 | for i in range(3, len(nodelist), 2): |
| 453 | names.append((nodelist[i][1], None)) |
| 454 | else: |
| 455 | for i in range(3, len(nodelist), 2): |
Jeremy Hylton | 42a0830 | 2001-04-09 04:27:12 +0000 | [diff] [blame] | 456 | names.append(self.com_import_as_name(nodelist[i])) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 457 | n = From(self.com_dotted_name(nodelist[1]), names) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 458 | n.lineno = nodelist[0][2] |
| 459 | return n |
| 460 | |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 461 | if nodelist[1][0] == symbol.dotted_name: |
| 462 | names = [(self.com_dotted_name(nodelist[1][1:]), None)] |
| 463 | else: |
| 464 | names = [] |
| 465 | for i in range(1, len(nodelist), 2): |
| 466 | names.append(self.com_dotted_as_name(nodelist[i])) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 467 | n = Import(names) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 468 | n.lineno = nodelist[0][2] |
| 469 | return n |
| 470 | |
| 471 | def global_stmt(self, nodelist): |
| 472 | # global: NAME (',' NAME)* |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 473 | names = [] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 474 | for i in range(1, len(nodelist), 2): |
| 475 | names.append(nodelist[i][1]) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 476 | n = Global(names) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 477 | n.lineno = nodelist[0][2] |
| 478 | return n |
| 479 | |
| 480 | def exec_stmt(self, nodelist): |
| 481 | # exec_stmt: 'exec' expr ['in' expr [',' expr]] |
| 482 | expr1 = self.com_node(nodelist[1]) |
| 483 | if len(nodelist) >= 4: |
| 484 | expr2 = self.com_node(nodelist[3]) |
| 485 | if len(nodelist) >= 6: |
| 486 | expr3 = self.com_node(nodelist[5]) |
| 487 | else: |
| 488 | expr3 = None |
| 489 | else: |
| 490 | expr2 = expr3 = None |
| 491 | |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 492 | n = Exec(expr1, expr2, expr3) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 493 | n.lineno = nodelist[0][2] |
| 494 | return n |
| 495 | |
| 496 | def assert_stmt(self, nodelist): |
| 497 | # 'assert': test, [',' test] |
| 498 | expr1 = self.com_node(nodelist[1]) |
| 499 | if (len(nodelist) == 4): |
| 500 | expr2 = self.com_node(nodelist[3]) |
| 501 | else: |
Jeremy Hylton | a59ac0a | 2000-11-06 03:33:52 +0000 | [diff] [blame] | 502 | expr2 = None |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 503 | n = Assert(expr1, expr2) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 504 | n.lineno = nodelist[0][2] |
| 505 | return n |
| 506 | |
| 507 | def if_stmt(self, nodelist): |
| 508 | # if: test ':' suite ('elif' test ':' suite)* ['else' ':' suite] |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 509 | tests = [] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 510 | for i in range(0, len(nodelist) - 3, 4): |
| 511 | testNode = self.com_node(nodelist[i + 1]) |
| 512 | suiteNode = self.com_node(nodelist[i + 3]) |
| 513 | tests.append((testNode, suiteNode)) |
| 514 | |
| 515 | if len(nodelist) % 4 == 3: |
| 516 | elseNode = self.com_node(nodelist[-1]) |
| 517 | ## elseNode.lineno = nodelist[-1][1][2] |
| 518 | else: |
| 519 | elseNode = None |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 520 | n = If(tests, elseNode) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 521 | n.lineno = nodelist[0][2] |
| 522 | return n |
| 523 | |
| 524 | def while_stmt(self, nodelist): |
| 525 | # 'while' test ':' suite ['else' ':' suite] |
| 526 | |
| 527 | testNode = self.com_node(nodelist[1]) |
| 528 | bodyNode = self.com_node(nodelist[3]) |
| 529 | |
| 530 | if len(nodelist) > 4: |
| 531 | elseNode = self.com_node(nodelist[6]) |
| 532 | else: |
| 533 | elseNode = None |
| 534 | |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 535 | n = While(testNode, bodyNode, elseNode) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 536 | n.lineno = nodelist[0][2] |
| 537 | return n |
| 538 | |
| 539 | def for_stmt(self, nodelist): |
| 540 | # 'for' exprlist 'in' exprlist ':' suite ['else' ':' suite] |
| 541 | |
| 542 | assignNode = self.com_assign(nodelist[1], OP_ASSIGN) |
| 543 | listNode = self.com_node(nodelist[3]) |
| 544 | bodyNode = self.com_node(nodelist[5]) |
| 545 | |
| 546 | if len(nodelist) > 8: |
| 547 | elseNode = self.com_node(nodelist[8]) |
| 548 | else: |
| 549 | elseNode = None |
| 550 | |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 551 | n = For(assignNode, listNode, bodyNode, elseNode) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 552 | n.lineno = nodelist[0][2] |
| 553 | return n |
| 554 | |
| 555 | def try_stmt(self, nodelist): |
| 556 | # 'try' ':' suite (except_clause ':' suite)+ ['else' ':' suite] |
| 557 | # | 'try' ':' suite 'finally' ':' suite |
| 558 | if nodelist[3][0] != symbol.except_clause: |
| 559 | return self.com_try_finally(nodelist) |
| 560 | |
| 561 | return self.com_try_except(nodelist) |
| 562 | |
| 563 | def suite(self, nodelist): |
| 564 | # simple_stmt | NEWLINE INDENT NEWLINE* (stmt NEWLINE*)+ DEDENT |
| 565 | if len(nodelist) == 1: |
| 566 | return self.com_stmt(nodelist[0]) |
| 567 | |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 568 | stmts = [] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 569 | for node in nodelist: |
| 570 | if node[0] == symbol.stmt: |
| 571 | self.com_append_stmt(stmts, node) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 572 | return Stmt(stmts) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 573 | |
| 574 | # -------------------------------------------------------------- |
| 575 | # |
| 576 | # EXPRESSION NODES (invoked by com_node()) |
| 577 | # |
| 578 | |
| 579 | def testlist(self, nodelist): |
| 580 | # testlist: expr (',' expr)* [','] |
Jeremy Hylton | d114261 | 2001-10-17 13:32:52 +0000 | [diff] [blame] | 581 | # testlist_safe: test [(',' test)+ [',']] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 582 | # exprlist: expr (',' expr)* [','] |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 583 | return self.com_binary(Tuple, nodelist) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 584 | |
Jeremy Hylton | d114261 | 2001-10-17 13:32:52 +0000 | [diff] [blame] | 585 | testlist_safe = testlist # XXX |
Jeremy Hylton | accb62b | 2002-12-31 18:17:44 +0000 | [diff] [blame] | 586 | testlist1 = testlist |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 587 | exprlist = testlist |
| 588 | |
Raymond Hettinger | 354433a | 2004-05-19 08:20:33 +0000 | [diff] [blame] | 589 | def testlist_gexp(self, nodelist): |
| 590 | if len(nodelist) == 2 and nodelist[1][0] == symbol.gen_for: |
| 591 | test = self.com_node(nodelist[0]) |
| 592 | return self.com_generator_expression(test, nodelist[1]) |
| 593 | return self.testlist(nodelist) |
| 594 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 595 | def test(self, nodelist): |
| 596 | # and_test ('or' and_test)* | lambdef |
| 597 | if len(nodelist) == 1 and nodelist[0][0] == symbol.lambdef: |
| 598 | return self.lambdef(nodelist[0]) |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 599 | return self.com_binary(Or, nodelist) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 600 | |
| 601 | def and_test(self, nodelist): |
| 602 | # not_test ('and' not_test)* |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 603 | return self.com_binary(And, nodelist) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 604 | |
| 605 | def not_test(self, nodelist): |
| 606 | # 'not' not_test | comparison |
| 607 | result = self.com_node(nodelist[-1]) |
| 608 | if len(nodelist) == 2: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 609 | n = Not(result) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 610 | n.lineno = nodelist[0][2] |
| 611 | return n |
| 612 | return result |
| 613 | |
| 614 | def comparison(self, nodelist): |
| 615 | # comparison: expr (comp_op expr)* |
| 616 | node = self.com_node(nodelist[0]) |
| 617 | if len(nodelist) == 1: |
| 618 | return node |
| 619 | |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 620 | results = [] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 621 | for i in range(2, len(nodelist), 2): |
| 622 | nl = nodelist[i-1] |
| 623 | |
| 624 | # comp_op: '<' | '>' | '=' | '>=' | '<=' | '<>' | '!=' | '==' |
| 625 | # | 'in' | 'not' 'in' | 'is' | 'is' 'not' |
| 626 | n = nl[1] |
| 627 | if n[0] == token.NAME: |
| 628 | type = n[1] |
| 629 | if len(nl) == 3: |
| 630 | if type == 'not': |
| 631 | type = 'not in' |
| 632 | else: |
| 633 | type = 'is not' |
| 634 | else: |
| 635 | type = _cmp_types[n[0]] |
| 636 | |
| 637 | lineno = nl[1][2] |
| 638 | results.append((type, self.com_node(nodelist[i]))) |
| 639 | |
| 640 | # we need a special "compare" node so that we can distinguish |
| 641 | # 3 < x < 5 from (3 < x) < 5 |
| 642 | # the two have very different semantics and results (note that the |
| 643 | # latter form is always true) |
| 644 | |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 645 | n = Compare(node, results) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 646 | n.lineno = lineno |
| 647 | return n |
| 648 | |
| 649 | def expr(self, nodelist): |
| 650 | # xor_expr ('|' xor_expr)* |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 651 | return self.com_binary(Bitor, nodelist) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 652 | |
| 653 | def xor_expr(self, nodelist): |
| 654 | # xor_expr ('^' xor_expr)* |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 655 | return self.com_binary(Bitxor, nodelist) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 656 | |
| 657 | def and_expr(self, nodelist): |
| 658 | # xor_expr ('&' xor_expr)* |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 659 | return self.com_binary(Bitand, nodelist) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 660 | |
| 661 | def shift_expr(self, nodelist): |
| 662 | # shift_expr ('<<'|'>>' shift_expr)* |
| 663 | node = self.com_node(nodelist[0]) |
| 664 | for i in range(2, len(nodelist), 2): |
| 665 | right = self.com_node(nodelist[i]) |
| 666 | if nodelist[i-1][0] == token.LEFTSHIFT: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 667 | node = LeftShift([node, right]) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 668 | node.lineno = nodelist[1][2] |
Jeremy Hylton | 7abf520 | 2001-08-29 18:12:30 +0000 | [diff] [blame] | 669 | elif nodelist[i-1][0] == token.RIGHTSHIFT: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 670 | node = RightShift([node, right]) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 671 | node.lineno = nodelist[1][2] |
Jeremy Hylton | 7abf520 | 2001-08-29 18:12:30 +0000 | [diff] [blame] | 672 | else: |
| 673 | raise ValueError, "unexpected token: %s" % nodelist[i-1][0] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 674 | return node |
| 675 | |
| 676 | def arith_expr(self, nodelist): |
| 677 | node = self.com_node(nodelist[0]) |
| 678 | for i in range(2, len(nodelist), 2): |
| 679 | right = self.com_node(nodelist[i]) |
| 680 | if nodelist[i-1][0] == token.PLUS: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 681 | node = Add([node, right]) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 682 | node.lineno = nodelist[1][2] |
Jeremy Hylton | 7abf520 | 2001-08-29 18:12:30 +0000 | [diff] [blame] | 683 | elif nodelist[i-1][0] == token.MINUS: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 684 | node = Sub([node, right]) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 685 | node.lineno = nodelist[1][2] |
Jeremy Hylton | 7abf520 | 2001-08-29 18:12:30 +0000 | [diff] [blame] | 686 | else: |
| 687 | raise ValueError, "unexpected token: %s" % nodelist[i-1][0] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 688 | return node |
| 689 | |
| 690 | def term(self, nodelist): |
| 691 | node = self.com_node(nodelist[0]) |
| 692 | for i in range(2, len(nodelist), 2): |
| 693 | right = self.com_node(nodelist[i]) |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 694 | t = nodelist[i-1][0] |
| 695 | if t == token.STAR: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 696 | node = Mul([node, right]) |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 697 | elif t == token.SLASH: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 698 | node = Div([node, right]) |
Jeremy Hylton | 7abf520 | 2001-08-29 18:12:30 +0000 | [diff] [blame] | 699 | elif t == token.PERCENT: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 700 | node = Mod([node, right]) |
Jeremy Hylton | 7abf520 | 2001-08-29 18:12:30 +0000 | [diff] [blame] | 701 | elif t == token.DOUBLESLASH: |
| 702 | node = FloorDiv([node, right]) |
| 703 | else: |
| 704 | raise ValueError, "unexpected token: %s" % t |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 705 | node.lineno = nodelist[1][2] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 706 | return node |
| 707 | |
| 708 | def factor(self, nodelist): |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 709 | elt = nodelist[0] |
| 710 | t = elt[0] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 711 | node = self.com_node(nodelist[-1]) |
Jeremy Hylton | accb62b | 2002-12-31 18:17:44 +0000 | [diff] [blame] | 712 | # need to handle (unary op)constant here... |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 713 | if t == token.PLUS: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 714 | node = UnaryAdd(node) |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 715 | node.lineno = elt[2] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 716 | elif t == token.MINUS: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 717 | node = UnarySub(node) |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 718 | node.lineno = elt[2] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 719 | elif t == token.TILDE: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 720 | node = Invert(node) |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 721 | node.lineno = elt[2] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 722 | return node |
| 723 | |
| 724 | def power(self, nodelist): |
| 725 | # power: atom trailer* ('**' factor)* |
| 726 | node = self.com_node(nodelist[0]) |
| 727 | for i in range(1, len(nodelist)): |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 728 | elt = nodelist[i] |
| 729 | if elt[0] == token.DOUBLESTAR: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 730 | n = Power([node, self.com_node(nodelist[i+1])]) |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 731 | n.lineno = elt[2] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 732 | return n |
| 733 | |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 734 | node = self.com_apply_trailer(node, elt) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 735 | |
| 736 | return node |
| 737 | |
| 738 | def atom(self, nodelist): |
Jeremy Hylton | 7845cf8 | 2001-08-29 20:56:30 +0000 | [diff] [blame] | 739 | n = self._atom_dispatch[nodelist[0][0]](nodelist) |
| 740 | n.lineno = nodelist[0][2] |
| 741 | return n |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 742 | |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 743 | def atom_lpar(self, nodelist): |
| 744 | if nodelist[1][0] == token.RPAR: |
| 745 | n = Tuple(()) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 746 | n.lineno = nodelist[0][2] |
| 747 | return n |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 748 | return self.com_node(nodelist[1]) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 749 | |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 750 | def atom_lsqb(self, nodelist): |
| 751 | if nodelist[1][0] == token.RSQB: |
| 752 | n = List(()) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 753 | n.lineno = nodelist[0][2] |
| 754 | return n |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 755 | return self.com_list_constructor(nodelist[1]) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 756 | |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 757 | def atom_lbrace(self, nodelist): |
| 758 | if nodelist[1][0] == token.RBRACE: |
| 759 | return Dict(()) |
| 760 | return self.com_dictmaker(nodelist[1]) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 761 | |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 762 | def atom_backquote(self, nodelist): |
| 763 | n = Backquote(self.com_node(nodelist[1])) |
| 764 | n.lineno = nodelist[0][2] |
| 765 | return n |
Tim Peters | e0c446b | 2001-10-18 21:57:37 +0000 | [diff] [blame] | 766 | |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 767 | def atom_number(self, nodelist): |
| 768 | ### need to verify this matches compile.c |
| 769 | k = eval(nodelist[0][1]) |
| 770 | n = Const(k) |
| 771 | n.lineno = nodelist[0][2] |
| 772 | return n |
Tim Peters | e0c446b | 2001-10-18 21:57:37 +0000 | [diff] [blame] | 773 | |
Jeremy Hylton | accb62b | 2002-12-31 18:17:44 +0000 | [diff] [blame] | 774 | def decode_literal(self, lit): |
| 775 | if self.encoding: |
| 776 | # this is particularly fragile & a bit of a |
| 777 | # hack... changes in compile.c:parsestr and |
| 778 | # tokenizer.c must be reflected here. |
| 779 | if self.encoding not in ['utf-8', 'iso-8859-1']: |
| 780 | lit = unicode(lit, 'utf-8').encode(self.encoding) |
| 781 | return eval("# coding: %s\n%s" % (self.encoding, lit)) |
| 782 | else: |
| 783 | return eval(lit) |
| 784 | |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 785 | def atom_string(self, nodelist): |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 786 | k = '' |
| 787 | for node in nodelist: |
Jeremy Hylton | accb62b | 2002-12-31 18:17:44 +0000 | [diff] [blame] | 788 | k += self.decode_literal(node[1]) |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 789 | n = Const(k) |
| 790 | n.lineno = nodelist[0][2] |
| 791 | return n |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 792 | |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 793 | def atom_name(self, nodelist): |
| 794 | ### any processing to do? |
| 795 | n = Name(nodelist[0][1]) |
| 796 | n.lineno = nodelist[0][2] |
| 797 | return n |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 798 | |
| 799 | # -------------------------------------------------------------- |
| 800 | # |
| 801 | # INTERNAL PARSING UTILITIES |
| 802 | # |
| 803 | |
Jeremy Hylton | 7e30c9b | 2001-08-27 21:02:51 +0000 | [diff] [blame] | 804 | # The use of com_node() introduces a lot of extra stack frames, |
| 805 | # enough to cause a stack overflow compiling test.test_parser with |
| 806 | # the standard interpreter recursionlimit. The com_node() is a |
| 807 | # convenience function that hides the dispatch details, but comes |
| 808 | # at a very high cost. It is more efficient to dispatch directly |
| 809 | # in the callers. In these cases, use lookup_node() and call the |
| 810 | # dispatched node directly. |
| 811 | |
| 812 | def lookup_node(self, node): |
| 813 | return self._dispatch[node[0]] |
| 814 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 815 | def com_node(self, node): |
| 816 | # Note: compile.c has handling in com_node for del_stmt, pass_stmt, |
| 817 | # break_stmt, stmt, small_stmt, flow_stmt, simple_stmt, |
| 818 | # and compound_stmt. |
| 819 | # We'll just dispatch them. |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 820 | return self._dispatch[node[0]](node[1:]) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 821 | |
Jeremy Hylton | 42a0830 | 2001-04-09 04:27:12 +0000 | [diff] [blame] | 822 | def com_NEWLINE(self, *args): |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 823 | # A ';' at the end of a line can make a NEWLINE token appear |
| 824 | # here, Render it harmless. (genc discards ('discard', |
| 825 | # ('const', xxxx)) Nodes) |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 826 | return Discard(Const(None)) |
Tim Peters | e0c446b | 2001-10-18 21:57:37 +0000 | [diff] [blame] | 827 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 828 | def com_arglist(self, nodelist): |
| 829 | # varargslist: |
Jeremy Hylton | 8d22b04 | 2002-04-19 22:56:37 +0000 | [diff] [blame] | 830 | # (fpdef ['=' test] ',')* ('*' NAME [',' '**' NAME] | '**' NAME) |
| 831 | # | fpdef ['=' test] (',' fpdef ['=' test])* [','] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 832 | # fpdef: NAME | '(' fplist ')' |
| 833 | # fplist: fpdef (',' fpdef)* [','] |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 834 | names = [] |
| 835 | defaults = [] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 836 | flags = 0 |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 837 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 838 | i = 0 |
| 839 | while i < len(nodelist): |
| 840 | node = nodelist[i] |
| 841 | if node[0] == token.STAR or node[0] == token.DOUBLESTAR: |
| 842 | if node[0] == token.STAR: |
| 843 | node = nodelist[i+1] |
| 844 | if node[0] == token.NAME: |
| 845 | names.append(node[1]) |
| 846 | flags = flags | CO_VARARGS |
| 847 | i = i + 3 |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 848 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 849 | if i < len(nodelist): |
Jeremy Hylton | 8d22b04 | 2002-04-19 22:56:37 +0000 | [diff] [blame] | 850 | # should be DOUBLESTAR |
Jeremy Hylton | 7abf520 | 2001-08-29 18:12:30 +0000 | [diff] [blame] | 851 | t = nodelist[i][0] |
| 852 | if t == token.DOUBLESTAR: |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 853 | node = nodelist[i+1] |
Jeremy Hylton | 7abf520 | 2001-08-29 18:12:30 +0000 | [diff] [blame] | 854 | else: |
| 855 | raise ValueError, "unexpected token: %s" % t |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 856 | names.append(node[1]) |
| 857 | flags = flags | CO_VARKEYWORDS |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 858 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 859 | break |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 860 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 861 | # fpdef: NAME | '(' fplist ')' |
| 862 | names.append(self.com_fpdef(node)) |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 863 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 864 | i = i + 1 |
| 865 | if i >= len(nodelist): |
| 866 | break |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 867 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 868 | if nodelist[i][0] == token.EQUAL: |
| 869 | defaults.append(self.com_node(nodelist[i + 1])) |
| 870 | i = i + 2 |
| 871 | elif len(defaults): |
| 872 | # Treat "(a=1, b)" as "(a=1, b=None)" |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 873 | defaults.append(Const(None)) |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 874 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 875 | i = i + 1 |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 876 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 877 | return names, defaults, flags |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 878 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 879 | def com_fpdef(self, node): |
| 880 | # fpdef: NAME | '(' fplist ')' |
| 881 | if node[1][0] == token.LPAR: |
| 882 | return self.com_fplist(node[2]) |
| 883 | return node[1][1] |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 884 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 885 | def com_fplist(self, node): |
Tim Peters | e0c446b | 2001-10-18 21:57:37 +0000 | [diff] [blame] | 886 | # fplist: fpdef (',' fpdef)* [','] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 887 | if len(node) == 2: |
| 888 | return self.com_fpdef(node[1]) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 889 | list = [] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 890 | for i in range(1, len(node), 2): |
| 891 | list.append(self.com_fpdef(node[i])) |
| 892 | return tuple(list) |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 893 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 894 | def com_dotted_name(self, node): |
| 895 | # String together the dotted names and return the string |
| 896 | name = "" |
| 897 | for n in node: |
| 898 | if type(n) == type(()) and n[0] == 1: |
| 899 | name = name + n[1] + '.' |
| 900 | return name[:-1] |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 901 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 902 | def com_dotted_as_name(self, node): |
| 903 | dot = self.com_dotted_name(node[1]) |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 904 | if len(node) <= 2: |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 905 | return dot, None |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 906 | if node[0] == symbol.dotted_name: |
| 907 | pass |
| 908 | else: |
| 909 | assert node[2][1] == 'as' |
| 910 | assert node[3][0] == token.NAME |
| 911 | return dot, node[3][1] |
Jeremy Hylton | 2051608 | 2000-09-01 20:33:26 +0000 | [diff] [blame] | 912 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 913 | def com_import_as_name(self, node): |
Jeremy Hylton | 42a0830 | 2001-04-09 04:27:12 +0000 | [diff] [blame] | 914 | if node[0] == token.STAR: |
Jeremy Hylton | 4e1be72 | 2000-10-12 20:23:23 +0000 | [diff] [blame] | 915 | return '*', None |
Jeremy Hylton | 42a0830 | 2001-04-09 04:27:12 +0000 | [diff] [blame] | 916 | assert node[0] == symbol.import_as_name |
| 917 | node = node[1:] |
| 918 | if len(node) == 1: |
| 919 | assert node[0][0] == token.NAME |
| 920 | return node[0][1], None |
| 921 | |
| 922 | assert node[1][1] == 'as', node |
| 923 | assert node[2][0] == token.NAME |
| 924 | return node[0][1], node[2][1] |
Jeremy Hylton | 2051608 | 2000-09-01 20:33:26 +0000 | [diff] [blame] | 925 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 926 | def com_bases(self, node): |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 927 | bases = [] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 928 | for i in range(1, len(node), 2): |
| 929 | bases.append(self.com_node(node[i])) |
| 930 | return bases |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 931 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 932 | def com_try_finally(self, nodelist): |
| 933 | # try_fin_stmt: "try" ":" suite "finally" ":" suite |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 934 | n = TryFinally(self.com_node(nodelist[2]), |
Tim Peters | e0c446b | 2001-10-18 21:57:37 +0000 | [diff] [blame] | 935 | self.com_node(nodelist[5])) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 936 | n.lineno = nodelist[0][2] |
| 937 | return n |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 938 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 939 | def com_try_except(self, nodelist): |
| 940 | # try_except: 'try' ':' suite (except_clause ':' suite)* ['else' suite] |
| 941 | #tryexcept: [TryNode, [except_clauses], elseNode)] |
| 942 | stmt = self.com_node(nodelist[2]) |
| 943 | clauses = [] |
| 944 | elseNode = None |
| 945 | for i in range(3, len(nodelist), 3): |
| 946 | node = nodelist[i] |
| 947 | if node[0] == symbol.except_clause: |
| 948 | # except_clause: 'except' [expr [',' expr]] */ |
| 949 | if len(node) > 2: |
| 950 | expr1 = self.com_node(node[2]) |
| 951 | if len(node) > 4: |
| 952 | expr2 = self.com_assign(node[4], OP_ASSIGN) |
| 953 | else: |
| 954 | expr2 = None |
| 955 | else: |
| 956 | expr1 = expr2 = None |
| 957 | clauses.append((expr1, expr2, self.com_node(nodelist[i+2]))) |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 958 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 959 | if node[0] == token.NAME: |
| 960 | elseNode = self.com_node(nodelist[i+2]) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 961 | n = TryExcept(self.com_node(nodelist[2]), clauses, elseNode) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 962 | n.lineno = nodelist[0][2] |
| 963 | return n |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 964 | |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 965 | def com_augassign_op(self, node): |
| 966 | assert node[0] == symbol.augassign |
| 967 | return node[1] |
| 968 | |
| 969 | def com_augassign(self, node): |
| 970 | """Return node suitable for lvalue of augmented assignment |
| 971 | |
| 972 | Names, slices, and attributes are the only allowable nodes. |
| 973 | """ |
| 974 | l = self.com_node(node) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 975 | if l.__class__ in (Name, Slice, Subscript, Getattr): |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 976 | return l |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 977 | raise SyntaxError, "can't assign to %s" % l.__class__.__name__ |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 978 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 979 | def com_assign(self, node, assigning): |
| 980 | # return a node suitable for use as an "lvalue" |
| 981 | # loop to avoid trivial recursion |
| 982 | while 1: |
| 983 | t = node[0] |
Michael W. Hudson | 3f06189 | 2004-07-12 13:15:56 +0000 | [diff] [blame] | 984 | if t == symbol.exprlist or t == symbol.testlist or t == symbol.testlist_gexp: |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 985 | if len(node) > 2: |
| 986 | return self.com_assign_tuple(node, assigning) |
| 987 | node = node[1] |
| 988 | elif t in _assign_types: |
| 989 | if len(node) > 2: |
| 990 | raise SyntaxError, "can't assign to operator" |
| 991 | node = node[1] |
| 992 | elif t == symbol.power: |
| 993 | if node[1][0] != symbol.atom: |
| 994 | raise SyntaxError, "can't assign to operator" |
| 995 | if len(node) > 2: |
| 996 | primary = self.com_node(node[1]) |
| 997 | for i in range(2, len(node)-1): |
| 998 | ch = node[i] |
| 999 | if ch[0] == token.DOUBLESTAR: |
| 1000 | raise SyntaxError, "can't assign to operator" |
| 1001 | primary = self.com_apply_trailer(primary, ch) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1002 | return self.com_assign_trailer(primary, node[-1], |
Tim Peters | e0c446b | 2001-10-18 21:57:37 +0000 | [diff] [blame] | 1003 | assigning) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1004 | node = node[1] |
| 1005 | elif t == symbol.atom: |
| 1006 | t = node[1][0] |
| 1007 | if t == token.LPAR: |
| 1008 | node = node[2] |
| 1009 | if node[0] == token.RPAR: |
| 1010 | raise SyntaxError, "can't assign to ()" |
| 1011 | elif t == token.LSQB: |
| 1012 | node = node[2] |
| 1013 | if node[0] == token.RSQB: |
| 1014 | raise SyntaxError, "can't assign to []" |
| 1015 | return self.com_assign_list(node, assigning) |
| 1016 | elif t == token.NAME: |
| 1017 | return self.com_assign_name(node[1], assigning) |
| 1018 | else: |
| 1019 | raise SyntaxError, "can't assign to literal" |
| 1020 | else: |
| 1021 | raise SyntaxError, "bad assignment" |
| 1022 | |
| 1023 | def com_assign_tuple(self, node, assigning): |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1024 | assigns = [] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1025 | for i in range(1, len(node), 2): |
| 1026 | assigns.append(self.com_assign(node[i], assigning)) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1027 | return AssTuple(assigns) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1028 | |
| 1029 | def com_assign_list(self, node, assigning): |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1030 | assigns = [] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1031 | for i in range(1, len(node), 2): |
Jeremy Hylton | 2e4cc7e | 2001-09-17 19:33:48 +0000 | [diff] [blame] | 1032 | if i + 1 < len(node): |
| 1033 | if node[i + 1][0] == symbol.list_for: |
| 1034 | raise SyntaxError, "can't assign to list comprehension" |
| 1035 | assert node[i + 1][0] == token.COMMA, node[i + 1] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1036 | assigns.append(self.com_assign(node[i], assigning)) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1037 | return AssList(assigns) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1038 | |
| 1039 | def com_assign_name(self, node, assigning): |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1040 | n = AssName(node[1], assigning) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1041 | n.lineno = node[2] |
| 1042 | return n |
| 1043 | |
| 1044 | def com_assign_trailer(self, primary, node, assigning): |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1045 | t = node[1][0] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1046 | if t == token.DOT: |
| 1047 | return self.com_assign_attr(primary, node[2], assigning) |
| 1048 | if t == token.LSQB: |
| 1049 | return self.com_subscriptlist(primary, node[2], assigning) |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 1050 | if t == token.LPAR: |
| 1051 | raise SyntaxError, "can't assign to function call" |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1052 | raise SyntaxError, "unknown trailer type: %s" % t |
| 1053 | |
| 1054 | def com_assign_attr(self, primary, node, assigning): |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1055 | return AssAttr(primary, node[1], assigning) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1056 | |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 1057 | def com_binary(self, constructor, nodelist): |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1058 | "Compile 'NODE (OP NODE)*' into (type, [ node1, ..., nodeN ])." |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1059 | l = len(nodelist) |
| 1060 | if l == 1: |
Jeremy Hylton | 7e30c9b | 2001-08-27 21:02:51 +0000 | [diff] [blame] | 1061 | n = nodelist[0] |
| 1062 | return self.lookup_node(n)(n[1:]) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1063 | items = [] |
| 1064 | for i in range(0, l, 2): |
Jeremy Hylton | 7e30c9b | 2001-08-27 21:02:51 +0000 | [diff] [blame] | 1065 | n = nodelist[i] |
| 1066 | items.append(self.lookup_node(n)(n[1:])) |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 1067 | return constructor(items) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1068 | |
| 1069 | def com_stmt(self, node): |
Jeremy Hylton | 7e30c9b | 2001-08-27 21:02:51 +0000 | [diff] [blame] | 1070 | result = self.lookup_node(node)(node[1:]) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1071 | assert result is not None |
| 1072 | if isinstance(result, Stmt): |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1073 | return result |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1074 | return Stmt([result]) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1075 | |
| 1076 | def com_append_stmt(self, stmts, node): |
| 1077 | result = self.com_node(node) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1078 | assert result is not None |
| 1079 | if isinstance(result, Stmt): |
| 1080 | stmts.extend(result.nodes) |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1081 | else: |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1082 | stmts.append(result) |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1083 | |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 1084 | if hasattr(symbol, 'list_for'): |
| 1085 | def com_list_constructor(self, nodelist): |
| 1086 | # listmaker: test ( list_for | (',' test)* [','] ) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1087 | values = [] |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 1088 | for i in range(1, len(nodelist)): |
| 1089 | if nodelist[i][0] == symbol.list_for: |
| 1090 | assert len(nodelist[i:]) == 1 |
| 1091 | return self.com_list_comprehension(values[0], |
| 1092 | nodelist[i]) |
| 1093 | elif nodelist[i][0] == token.COMMA: |
| 1094 | continue |
| 1095 | values.append(self.com_node(nodelist[i])) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1096 | return List(values) |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 1097 | |
| 1098 | def com_list_comprehension(self, expr, node): |
| 1099 | # list_iter: list_for | list_if |
| 1100 | # list_for: 'for' exprlist 'in' testlist [list_iter] |
| 1101 | # list_if: 'if' test [list_iter] |
Jeremy Hylton | 42a0830 | 2001-04-09 04:27:12 +0000 | [diff] [blame] | 1102 | |
| 1103 | # XXX should raise SyntaxError for assignment |
Tim Peters | e0c446b | 2001-10-18 21:57:37 +0000 | [diff] [blame] | 1104 | |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 1105 | lineno = node[1][2] |
| 1106 | fors = [] |
| 1107 | while node: |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 1108 | t = node[1][1] |
| 1109 | if t == 'for': |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 1110 | assignNode = self.com_assign(node[2], OP_ASSIGN) |
| 1111 | listNode = self.com_node(node[4]) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1112 | newfor = ListCompFor(assignNode, listNode, []) |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 1113 | newfor.lineno = node[1][2] |
| 1114 | fors.append(newfor) |
| 1115 | if len(node) == 5: |
| 1116 | node = None |
| 1117 | else: |
| 1118 | node = self.com_list_iter(node[5]) |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 1119 | elif t == 'if': |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 1120 | test = self.com_node(node[2]) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1121 | newif = ListCompIf(test) |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 1122 | newif.lineno = node[1][2] |
| 1123 | newfor.ifs.append(newif) |
| 1124 | if len(node) == 3: |
| 1125 | node = None |
| 1126 | else: |
| 1127 | node = self.com_list_iter(node[3]) |
| 1128 | else: |
| 1129 | raise SyntaxError, \ |
| 1130 | ("unexpected list comprehension element: %s %d" |
| 1131 | % (node, lineno)) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1132 | n = ListComp(expr, fors) |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 1133 | n.lineno = lineno |
| 1134 | return n |
| 1135 | |
| 1136 | def com_list_iter(self, node): |
| 1137 | assert node[0] == symbol.list_iter |
| 1138 | return node[1] |
| 1139 | else: |
| 1140 | def com_list_constructor(self, nodelist): |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1141 | values = [] |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 1142 | for i in range(1, len(nodelist), 2): |
| 1143 | values.append(self.com_node(nodelist[i])) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1144 | return List(values) |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1145 | |
Raymond Hettinger | 354433a | 2004-05-19 08:20:33 +0000 | [diff] [blame] | 1146 | if hasattr(symbol, 'gen_for'): |
| 1147 | def com_generator_expression(self, expr, node): |
| 1148 | # gen_iter: gen_for | gen_if |
| 1149 | # gen_for: 'for' exprlist 'in' test [gen_iter] |
| 1150 | # gen_if: 'if' test [gen_iter] |
| 1151 | |
| 1152 | lineno = node[1][2] |
| 1153 | fors = [] |
| 1154 | while node: |
| 1155 | t = node[1][1] |
| 1156 | if t == 'for': |
| 1157 | assignNode = self.com_assign(node[2], OP_ASSIGN) |
| 1158 | genNode = self.com_node(node[4]) |
| 1159 | newfor = GenExprFor(assignNode, genNode, []) |
| 1160 | newfor.lineno = node[1][2] |
| 1161 | fors.append(newfor) |
| 1162 | if (len(node)) == 5: |
| 1163 | node = None |
| 1164 | else: |
| 1165 | node = self.com_gen_iter(node[5]) |
| 1166 | elif t == 'if': |
| 1167 | test = self.com_node(node[2]) |
| 1168 | newif = GenExprIf(test) |
| 1169 | newif.lineno = node[1][2] |
| 1170 | newfor.ifs.append(newif) |
| 1171 | if len(node) == 3: |
| 1172 | node = None |
| 1173 | else: |
| 1174 | node = self.com_gen_iter(node[3]) |
| 1175 | else: |
| 1176 | raise SyntaxError, \ |
| 1177 | ("unexpected generator expression element: %s %d" |
| 1178 | % (node, lineno)) |
| 1179 | fors[0].is_outmost = True |
| 1180 | n = GenExpr(GenExprInner(expr, fors)) |
| 1181 | n.lineno = lineno |
| 1182 | return n |
| 1183 | |
| 1184 | def com_gen_iter(self, node): |
| 1185 | assert node[0] == symbol.gen_iter |
| 1186 | return node[1] |
| 1187 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1188 | def com_dictmaker(self, nodelist): |
| 1189 | # dictmaker: test ':' test (',' test ':' value)* [','] |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1190 | items = [] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1191 | for i in range(1, len(nodelist), 4): |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 1192 | items.append((self.com_node(nodelist[i]), |
| 1193 | self.com_node(nodelist[i+2]))) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1194 | return Dict(items) |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1195 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1196 | def com_apply_trailer(self, primaryNode, nodelist): |
| 1197 | t = nodelist[1][0] |
| 1198 | if t == token.LPAR: |
| 1199 | return self.com_call_function(primaryNode, nodelist[2]) |
| 1200 | if t == token.DOT: |
| 1201 | return self.com_select_member(primaryNode, nodelist[2]) |
| 1202 | if t == token.LSQB: |
| 1203 | return self.com_subscriptlist(primaryNode, nodelist[2], OP_APPLY) |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1204 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1205 | raise SyntaxError, 'unknown node type: %s' % t |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1206 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1207 | def com_select_member(self, primaryNode, nodelist): |
| 1208 | if nodelist[0] != token.NAME: |
| 1209 | raise SyntaxError, "member must be a name" |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1210 | n = Getattr(primaryNode, nodelist[1]) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1211 | n.lineno = nodelist[2] |
| 1212 | return n |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1213 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1214 | def com_call_function(self, primaryNode, nodelist): |
| 1215 | if nodelist[0] == token.RPAR: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1216 | return CallFunc(primaryNode, []) |
| 1217 | args = [] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1218 | kw = 0 |
| 1219 | len_nodelist = len(nodelist) |
| 1220 | for i in range(1, len_nodelist, 2): |
| 1221 | node = nodelist[i] |
| 1222 | if node[0] == token.STAR or node[0] == token.DOUBLESTAR: |
Tim Peters | e0c446b | 2001-10-18 21:57:37 +0000 | [diff] [blame] | 1223 | break |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1224 | kw, result = self.com_argument(node, kw) |
Raymond Hettinger | 354433a | 2004-05-19 08:20:33 +0000 | [diff] [blame] | 1225 | if len_nodelist != 2 and isinstance(result, GenExpr): |
| 1226 | raise SyntaxError, 'generator expression needs parenthesis' |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1227 | args.append(result) |
Jeremy Hylton | be317e6 | 2000-05-02 22:32:59 +0000 | [diff] [blame] | 1228 | else: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1229 | # No broken by star arg, so skip the last one we processed. |
| 1230 | i = i + 1 |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1231 | if i < len_nodelist and nodelist[i][0] == token.COMMA: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1232 | # need to accept an application that looks like "f(a, b,)" |
| 1233 | i = i + 1 |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1234 | star_node = dstar_node = None |
| 1235 | while i < len_nodelist: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1236 | tok = nodelist[i] |
| 1237 | ch = nodelist[i+1] |
| 1238 | i = i + 3 |
| 1239 | if tok[0]==token.STAR: |
| 1240 | if star_node is not None: |
| 1241 | raise SyntaxError, 'already have the varargs indentifier' |
| 1242 | star_node = self.com_node(ch) |
| 1243 | elif tok[0]==token.DOUBLESTAR: |
| 1244 | if dstar_node is not None: |
| 1245 | raise SyntaxError, 'already have the kwargs indentifier' |
| 1246 | dstar_node = self.com_node(ch) |
| 1247 | else: |
| 1248 | raise SyntaxError, 'unknown node type: %s' % tok |
Jeremy Hylton | be317e6 | 2000-05-02 22:32:59 +0000 | [diff] [blame] | 1249 | |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1250 | return CallFunc(primaryNode, args, star_node, dstar_node) |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1251 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1252 | def com_argument(self, nodelist, kw): |
Raymond Hettinger | 354433a | 2004-05-19 08:20:33 +0000 | [diff] [blame] | 1253 | if len(nodelist) == 3 and nodelist[2][0] == symbol.gen_for: |
| 1254 | test = self.com_node(nodelist[1]) |
| 1255 | return 0, self.com_generator_expression(test, nodelist[2]) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1256 | if len(nodelist) == 2: |
| 1257 | if kw: |
| 1258 | raise SyntaxError, "non-keyword arg after keyword arg" |
| 1259 | return 0, self.com_node(nodelist[1]) |
| 1260 | result = self.com_node(nodelist[3]) |
| 1261 | n = nodelist[1] |
| 1262 | while len(n) == 2 and n[0] != token.NAME: |
| 1263 | n = n[1] |
| 1264 | if n[0] != token.NAME: |
| 1265 | raise SyntaxError, "keyword can't be an expression (%s)"%n[0] |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1266 | node = Keyword(n[1], result) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1267 | node.lineno = n[2] |
| 1268 | return 1, node |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1269 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1270 | def com_subscriptlist(self, primary, nodelist, assigning): |
| 1271 | # slicing: simple_slicing | extended_slicing |
| 1272 | # simple_slicing: primary "[" short_slice "]" |
Tim Peters | e0c446b | 2001-10-18 21:57:37 +0000 | [diff] [blame] | 1273 | # extended_slicing: primary "[" slice_list "]" |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1274 | # slice_list: slice_item ("," slice_item)* [","] |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1275 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1276 | # backwards compat slice for '[i:j]' |
| 1277 | if len(nodelist) == 2: |
| 1278 | sub = nodelist[1] |
| 1279 | if (sub[1][0] == token.COLON or \ |
| 1280 | (len(sub) > 2 and sub[2][0] == token.COLON)) and \ |
| 1281 | sub[-1][0] != symbol.sliceop: |
| 1282 | return self.com_slice(primary, sub, assigning) |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1283 | |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1284 | subscripts = [] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1285 | for i in range(1, len(nodelist), 2): |
| 1286 | subscripts.append(self.com_subscript(nodelist[i])) |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1287 | |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1288 | return Subscript(primary, assigning, subscripts) |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1289 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1290 | def com_subscript(self, node): |
| 1291 | # slice_item: expression | proper_slice | ellipsis |
| 1292 | ch = node[1] |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 1293 | t = ch[0] |
| 1294 | if t == token.DOT and node[2][0] == token.DOT: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1295 | return Ellipsis() |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 1296 | if t == token.COLON or len(node) > 2: |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1297 | return self.com_sliceobj(node) |
| 1298 | return self.com_node(ch) |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1299 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1300 | def com_sliceobj(self, node): |
| 1301 | # proper_slice: short_slice | long_slice |
| 1302 | # short_slice: [lower_bound] ":" [upper_bound] |
| 1303 | # long_slice: short_slice ":" [stride] |
| 1304 | # lower_bound: expression |
| 1305 | # upper_bound: expression |
| 1306 | # stride: expression |
| 1307 | # |
| 1308 | # Note: a stride may be further slicing... |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1309 | |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1310 | items = [] |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1311 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1312 | if node[1][0] == token.COLON: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1313 | items.append(Const(None)) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1314 | i = 2 |
| 1315 | else: |
| 1316 | items.append(self.com_node(node[1])) |
| 1317 | # i == 2 is a COLON |
| 1318 | i = 3 |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1319 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1320 | if i < len(node) and node[i][0] == symbol.test: |
| 1321 | items.append(self.com_node(node[i])) |
| 1322 | i = i + 1 |
| 1323 | else: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1324 | items.append(Const(None)) |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1325 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1326 | # a short_slice has been built. look for long_slice now by looking |
| 1327 | # for strides... |
| 1328 | for j in range(i, len(node)): |
| 1329 | ch = node[j] |
| 1330 | if len(ch) == 2: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1331 | items.append(Const(None)) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1332 | else: |
| 1333 | items.append(self.com_node(ch[2])) |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1334 | |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1335 | return Sliceobj(items) |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1336 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1337 | def com_slice(self, primary, node, assigning): |
| 1338 | # short_slice: [lower_bound] ":" [upper_bound] |
| 1339 | lower = upper = None |
| 1340 | if len(node) == 3: |
| 1341 | if node[1][0] == token.COLON: |
| 1342 | upper = self.com_node(node[2]) |
| 1343 | else: |
| 1344 | lower = self.com_node(node[1]) |
| 1345 | elif len(node) == 4: |
| 1346 | lower = self.com_node(node[1]) |
| 1347 | upper = self.com_node(node[3]) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1348 | return Slice(primary, assigning, lower, upper) |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1349 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1350 | def get_docstring(self, node, n=None): |
| 1351 | if n is None: |
| 1352 | n = node[0] |
| 1353 | node = node[1:] |
| 1354 | if n == symbol.suite: |
| 1355 | if len(node) == 1: |
| 1356 | return self.get_docstring(node[0]) |
| 1357 | for sub in node: |
| 1358 | if sub[0] == symbol.stmt: |
| 1359 | return self.get_docstring(sub) |
| 1360 | return None |
| 1361 | if n == symbol.file_input: |
| 1362 | for sub in node: |
| 1363 | if sub[0] == symbol.stmt: |
| 1364 | return self.get_docstring(sub) |
| 1365 | return None |
| 1366 | if n == symbol.atom: |
| 1367 | if node[0][0] == token.STRING: |
| 1368 | s = '' |
| 1369 | for t in node: |
| 1370 | s = s + eval(t[1]) |
| 1371 | return s |
| 1372 | return None |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1373 | if n == symbol.stmt or n == symbol.simple_stmt \ |
| 1374 | or n == symbol.small_stmt: |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1375 | return self.get_docstring(node[0]) |
| 1376 | if n in _doc_nodes and len(node) == 1: |
| 1377 | return self.get_docstring(node[0]) |
| 1378 | return None |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1379 | |
| 1380 | |
| 1381 | _doc_nodes = [ |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1382 | symbol.expr_stmt, |
| 1383 | symbol.testlist, |
Jeremy Hylton | d114261 | 2001-10-17 13:32:52 +0000 | [diff] [blame] | 1384 | symbol.testlist_safe, |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1385 | symbol.test, |
| 1386 | symbol.and_test, |
| 1387 | symbol.not_test, |
| 1388 | symbol.comparison, |
| 1389 | symbol.expr, |
| 1390 | symbol.xor_expr, |
| 1391 | symbol.and_expr, |
| 1392 | symbol.shift_expr, |
| 1393 | symbol.arith_expr, |
| 1394 | symbol.term, |
| 1395 | symbol.factor, |
| 1396 | symbol.power, |
| 1397 | ] |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1398 | |
| 1399 | # comp_op: '<' | '>' | '=' | '>=' | '<=' | '<>' | '!=' | '==' |
| 1400 | # | 'in' | 'not' 'in' | 'is' | 'is' 'not' |
| 1401 | _cmp_types = { |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1402 | token.LESS : '<', |
| 1403 | token.GREATER : '>', |
| 1404 | token.EQEQUAL : '==', |
| 1405 | token.EQUAL : '==', |
| 1406 | token.LESSEQUAL : '<=', |
| 1407 | token.GREATEREQUAL : '>=', |
| 1408 | token.NOTEQUAL : '!=', |
| 1409 | } |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1410 | |
| 1411 | _legal_node_types = [ |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1412 | symbol.funcdef, |
| 1413 | symbol.classdef, |
| 1414 | symbol.stmt, |
| 1415 | symbol.small_stmt, |
| 1416 | symbol.flow_stmt, |
| 1417 | symbol.simple_stmt, |
| 1418 | symbol.compound_stmt, |
| 1419 | symbol.expr_stmt, |
| 1420 | symbol.print_stmt, |
| 1421 | symbol.del_stmt, |
| 1422 | symbol.pass_stmt, |
| 1423 | symbol.break_stmt, |
| 1424 | symbol.continue_stmt, |
| 1425 | symbol.return_stmt, |
| 1426 | symbol.raise_stmt, |
| 1427 | symbol.import_stmt, |
| 1428 | symbol.global_stmt, |
| 1429 | symbol.exec_stmt, |
| 1430 | symbol.assert_stmt, |
| 1431 | symbol.if_stmt, |
| 1432 | symbol.while_stmt, |
| 1433 | symbol.for_stmt, |
| 1434 | symbol.try_stmt, |
| 1435 | symbol.suite, |
| 1436 | symbol.testlist, |
Jeremy Hylton | d114261 | 2001-10-17 13:32:52 +0000 | [diff] [blame] | 1437 | symbol.testlist_safe, |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1438 | symbol.test, |
| 1439 | symbol.and_test, |
| 1440 | symbol.not_test, |
| 1441 | symbol.comparison, |
| 1442 | symbol.exprlist, |
| 1443 | symbol.expr, |
| 1444 | symbol.xor_expr, |
| 1445 | symbol.and_expr, |
| 1446 | symbol.shift_expr, |
| 1447 | symbol.arith_expr, |
| 1448 | symbol.term, |
| 1449 | symbol.factor, |
| 1450 | symbol.power, |
| 1451 | symbol.atom, |
| 1452 | ] |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1453 | |
Jeremy Hylton | 7e30c9b | 2001-08-27 21:02:51 +0000 | [diff] [blame] | 1454 | if hasattr(symbol, 'yield_stmt'): |
| 1455 | _legal_node_types.append(symbol.yield_stmt) |
| 1456 | |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1457 | _assign_types = [ |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1458 | symbol.test, |
| 1459 | symbol.and_test, |
| 1460 | symbol.not_test, |
| 1461 | symbol.comparison, |
| 1462 | symbol.expr, |
| 1463 | symbol.xor_expr, |
| 1464 | symbol.and_expr, |
| 1465 | symbol.shift_expr, |
| 1466 | symbol.arith_expr, |
| 1467 | symbol.term, |
| 1468 | symbol.factor, |
| 1469 | ] |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 1470 | |
| 1471 | import types |
| 1472 | _names = {} |
| 1473 | for k, v in symbol.sym_name.items(): |
| 1474 | _names[k] = v |
| 1475 | for k, v in token.tok_name.items(): |
| 1476 | _names[k] = v |
| 1477 | |
| 1478 | def debug_tree(tree): |
| 1479 | l = [] |
| 1480 | for elt in tree: |
| 1481 | if type(elt) == types.IntType: |
| 1482 | l.append(_names.get(elt, elt)) |
| 1483 | elif type(elt) == types.StringType: |
| 1484 | l.append(elt) |
| 1485 | else: |
| 1486 | l.append(debug_tree(elt)) |
| 1487 | return l |