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 |
Jeremy Hylton | 566d934 | 2004-09-07 15:28:01 +0000 | [diff] [blame] | 17 | # |
| 18 | # Some fixes to try to have correct line number on almost all nodes |
| 19 | # (except Module, Discard and Stmt) added by Sylvain Thenault |
| 20 | # |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 21 | # Portions of this file are: |
| 22 | # Copyright (C) 1997-1998 Greg Stein. All Rights Reserved. |
| 23 | # |
| 24 | # This module is provided under a BSD-ish license. See |
| 25 | # http://www.opensource.org/licenses/bsd-license.html |
| 26 | # and replace OWNER, ORGANIZATION, and YEAR as appropriate. |
| 27 | |
Jeremy Hylton | 566d934 | 2004-09-07 15:28:01 +0000 | [diff] [blame] | 28 | from compiler.ast import * |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 29 | import parser |
| 30 | import symbol |
| 31 | import token |
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 | 566d934 | 2004-09-07 15:28:01 +0000 | [diff] [blame] | 34 | class WalkerError(StandardError): |
| 35 | pass |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 36 | |
Jeremy Hylton | 9605c11 | 2000-02-08 18:57:32 +0000 | [diff] [blame] | 37 | from consts import CO_VARARGS, CO_VARKEYWORDS |
| 38 | from consts import OP_ASSIGN, OP_DELETE, OP_APPLY |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 39 | |
Jeremy Hylton | fa974a9 | 2000-03-06 18:50:48 +0000 | [diff] [blame] | 40 | def parseFile(path): |
Jeremy Hylton | 566d934 | 2004-09-07 15:28:01 +0000 | [diff] [blame] | 41 | f = open(path, "U") |
Jeremy Hylton | accb62b | 2002-12-31 18:17:44 +0000 | [diff] [blame] | 42 | # XXX The parser API tolerates files without a trailing newline, |
| 43 | # but not strings without a trailing newline. Always add an extra |
| 44 | # newline to the file contents, since we're going through the string |
| 45 | # version of the API. |
| 46 | src = f.read() + "\n" |
Jeremy Hylton | fa974a9 | 2000-03-06 18:50:48 +0000 | [diff] [blame] | 47 | f.close() |
| 48 | return parse(src) |
| 49 | |
Jeremy Hylton | 9dca364 | 2001-09-17 21:02:51 +0000 | [diff] [blame] | 50 | def parse(buf, mode="exec"): |
| 51 | if mode == "exec" or mode == "single": |
| 52 | return Transformer().parsesuite(buf) |
| 53 | elif mode == "eval": |
| 54 | return Transformer().parseexpr(buf) |
| 55 | else: |
| 56 | raise ValueError("compile() arg 3 must be" |
| 57 | " 'exec' or 'eval' or 'single'") |
Jeremy Hylton | fa974a9 | 2000-03-06 18:50:48 +0000 | [diff] [blame] | 58 | |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 59 | def asList(nodes): |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 60 | l = [] |
| 61 | for item in nodes: |
| 62 | if hasattr(item, "asList"): |
| 63 | l.append(item.asList()) |
| 64 | else: |
| 65 | if type(item) is type( (None, None) ): |
| 66 | l.append(tuple(asList(item))) |
| 67 | elif type(item) is type( [] ): |
| 68 | l.append(asList(item)) |
| 69 | else: |
| 70 | l.append(item) |
| 71 | return l |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 72 | |
Jeremy Hylton | 566d934 | 2004-09-07 15:28:01 +0000 | [diff] [blame] | 73 | def extractLineNo(ast): |
| 74 | if not isinstance(ast[1], tuple): |
| 75 | # get a terminal node |
| 76 | return ast[2] |
| 77 | for child in ast[1:]: |
| 78 | if isinstance(child, tuple): |
| 79 | lineno = extractLineNo(child) |
| 80 | if lineno is not None: |
| 81 | return lineno |
Tim Peters | 0e9980f | 2004-09-12 03:49:31 +0000 | [diff] [blame] | 82 | |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 83 | def Node(*args): |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 84 | kind = args[0] |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 85 | if nodes.has_key(kind): |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 86 | try: |
Raymond Hettinger | ff41c48 | 2003-04-06 09:01:11 +0000 | [diff] [blame] | 87 | return nodes[kind](*args[1:]) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 88 | except TypeError: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 89 | print nodes[kind], len(args), args |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 90 | raise |
| 91 | else: |
Jeremy Hylton | 566d934 | 2004-09-07 15:28:01 +0000 | [diff] [blame] | 92 | raise WalkerEror, "Can't find appropriate Node type: %s" % str(args) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 93 | #return apply(ast.Node, args) |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 94 | |
| 95 | class Transformer: |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 96 | """Utility object for transforming Python parse trees. |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 97 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 98 | Exposes the following methods: |
| 99 | tree = transform(ast_tree) |
| 100 | tree = parsesuite(text) |
| 101 | tree = parseexpr(text) |
| 102 | tree = parsefile(fileob | filename) |
| 103 | """ |
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 __init__(self): |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 106 | self._dispatch = {} |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 107 | for value, name in symbol.sym_name.items(): |
| 108 | if hasattr(self, name): |
| 109 | self._dispatch[value] = getattr(self, name) |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 110 | self._dispatch[token.NEWLINE] = self.com_NEWLINE |
| 111 | self._atom_dispatch = {token.LPAR: self.atom_lpar, |
| 112 | token.LSQB: self.atom_lsqb, |
| 113 | token.LBRACE: self.atom_lbrace, |
| 114 | token.BACKQUOTE: self.atom_backquote, |
| 115 | token.NUMBER: self.atom_number, |
| 116 | token.STRING: self.atom_string, |
| 117 | token.NAME: self.atom_name, |
| 118 | } |
Jeremy Hylton | accb62b | 2002-12-31 18:17:44 +0000 | [diff] [blame] | 119 | self.encoding = None |
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 | def transform(self, tree): |
| 122 | """Transform an AST into a modified parse tree.""" |
Jeremy Hylton | 566d934 | 2004-09-07 15:28:01 +0000 | [diff] [blame] | 123 | if not (isinstance(tree, tuple) or isinstance(tree, list)): |
Jeremy Hylton | 7845cf8 | 2001-08-29 20:56:30 +0000 | [diff] [blame] | 124 | tree = parser.ast2tuple(tree, line_info=1) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 125 | return self.compile_node(tree) |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 126 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 127 | def parsesuite(self, text): |
| 128 | """Return a modified parse tree for the given suite text.""" |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 129 | return self.transform(parser.suite(text)) |
Tim Peters | 0e9980f | 2004-09-12 03:49:31 +0000 | [diff] [blame] | 130 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 131 | def parseexpr(self, text): |
| 132 | """Return a modified parse tree for the given expression text.""" |
| 133 | return self.transform(parser.expr(text)) |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 134 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 135 | def parsefile(self, file): |
| 136 | """Return a modified parse tree for the contents of the given file.""" |
| 137 | if type(file) == type(''): |
| 138 | file = open(file) |
| 139 | return self.parsesuite(file.read()) |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 140 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 141 | # -------------------------------------------------------------- |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 142 | # |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 143 | # PRIVATE METHODS |
| 144 | # |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 145 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 146 | def compile_node(self, node): |
| 147 | ### emit a line-number node? |
| 148 | n = node[0] |
Jeremy Hylton | accb62b | 2002-12-31 18:17:44 +0000 | [diff] [blame] | 149 | |
| 150 | if n == symbol.encoding_decl: |
| 151 | self.encoding = node[2] |
| 152 | node = node[1] |
| 153 | n = node[0] |
Tim Peters | 669454e | 2003-03-07 17:30:48 +0000 | [diff] [blame] | 154 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 155 | if n == symbol.single_input: |
| 156 | return self.single_input(node[1:]) |
| 157 | if n == symbol.file_input: |
| 158 | return self.file_input(node[1:]) |
| 159 | if n == symbol.eval_input: |
| 160 | return self.eval_input(node[1:]) |
| 161 | if n == symbol.lambdef: |
| 162 | return self.lambdef(node[1:]) |
| 163 | if n == symbol.funcdef: |
| 164 | return self.funcdef(node[1:]) |
| 165 | if n == symbol.classdef: |
| 166 | return self.classdef(node[1:]) |
| 167 | |
Jeremy Hylton | 566d934 | 2004-09-07 15:28:01 +0000 | [diff] [blame] | 168 | raise WalkerEror, ('unexpected node type', n) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 169 | |
| 170 | def single_input(self, node): |
| 171 | ### do we want to do anything about being "interactive" ? |
| 172 | |
| 173 | # NEWLINE | simple_stmt | compound_stmt NEWLINE |
| 174 | n = node[0][0] |
| 175 | if n != token.NEWLINE: |
| 176 | return self.com_stmt(node[0]) |
| 177 | |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 178 | return Pass() |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 179 | |
| 180 | def file_input(self, nodelist): |
| 181 | doc = self.get_docstring(nodelist, symbol.file_input) |
Jeremy Hylton | ec92734 | 2001-08-18 00:04:31 +0000 | [diff] [blame] | 182 | if doc is not None: |
| 183 | i = 1 |
| 184 | else: |
| 185 | i = 0 |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 186 | stmts = [] |
Jeremy Hylton | ec92734 | 2001-08-18 00:04:31 +0000 | [diff] [blame] | 187 | for node in nodelist[i:]: |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 188 | if node[0] != token.ENDMARKER and node[0] != token.NEWLINE: |
| 189 | self.com_append_stmt(stmts, node) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 190 | return Module(doc, Stmt(stmts)) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 191 | |
| 192 | def eval_input(self, nodelist): |
| 193 | # from the built-in function input() |
| 194 | ### is this sufficient? |
Barry Warsaw | 52acb49 | 2001-12-21 20:04:22 +0000 | [diff] [blame] | 195 | return Expression(self.com_node(nodelist[0])) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 196 | |
Anthony Baxter | c2a5a63 | 2004-08-02 06:10:11 +0000 | [diff] [blame] | 197 | def decorator_name(self, nodelist): |
| 198 | listlen = len(nodelist) |
| 199 | assert listlen >= 1 and listlen % 2 == 1 |
| 200 | |
| 201 | item = self.atom_name(nodelist) |
| 202 | i = 1 |
| 203 | while i < listlen: |
| 204 | assert nodelist[i][0] == token.DOT |
| 205 | assert nodelist[i + 1][0] == token.NAME |
| 206 | item = Getattr(item, nodelist[i + 1][1]) |
| 207 | i += 2 |
| 208 | |
| 209 | return item |
Tim Peters | 6db15d7 | 2004-08-04 02:36:18 +0000 | [diff] [blame] | 210 | |
Anthony Baxter | c2a5a63 | 2004-08-02 06:10:11 +0000 | [diff] [blame] | 211 | def decorator(self, nodelist): |
| 212 | # '@' dotted_name [ '(' [arglist] ')' ] |
Michael W. Hudson | 0ccff07 | 2004-08-17 17:29:16 +0000 | [diff] [blame] | 213 | assert len(nodelist) in (3, 5, 6) |
Anthony Baxter | c2a5a63 | 2004-08-02 06:10:11 +0000 | [diff] [blame] | 214 | assert nodelist[0][0] == token.AT |
Michael W. Hudson | 0ccff07 | 2004-08-17 17:29:16 +0000 | [diff] [blame] | 215 | assert nodelist[-1][0] == token.NEWLINE |
Anthony Baxter | c2a5a63 | 2004-08-02 06:10:11 +0000 | [diff] [blame] | 216 | |
| 217 | assert nodelist[1][0] == symbol.dotted_name |
| 218 | funcname = self.decorator_name(nodelist[1][1:]) |
| 219 | |
Michael W. Hudson | 0ccff07 | 2004-08-17 17:29:16 +0000 | [diff] [blame] | 220 | if len(nodelist) > 3: |
Anthony Baxter | c2a5a63 | 2004-08-02 06:10:11 +0000 | [diff] [blame] | 221 | assert nodelist[2][0] == token.LPAR |
| 222 | expr = self.com_call_function(funcname, nodelist[3]) |
| 223 | else: |
| 224 | expr = funcname |
Tim Peters | 6db15d7 | 2004-08-04 02:36:18 +0000 | [diff] [blame] | 225 | |
Anthony Baxter | c2a5a63 | 2004-08-02 06:10:11 +0000 | [diff] [blame] | 226 | return expr |
Tim Peters | 6db15d7 | 2004-08-04 02:36:18 +0000 | [diff] [blame] | 227 | |
Anthony Baxter | c2a5a63 | 2004-08-02 06:10:11 +0000 | [diff] [blame] | 228 | def decorators(self, nodelist): |
| 229 | # decorators: decorator ([NEWLINE] decorator)* NEWLINE |
Anthony Baxter | c2a5a63 | 2004-08-02 06:10:11 +0000 | [diff] [blame] | 230 | items = [] |
Michael W. Hudson | 0ccff07 | 2004-08-17 17:29:16 +0000 | [diff] [blame] | 231 | for dec_nodelist in nodelist: |
| 232 | assert dec_nodelist[0] == symbol.decorator |
| 233 | items.append(self.decorator(dec_nodelist[1:])) |
Anthony Baxter | c2a5a63 | 2004-08-02 06:10:11 +0000 | [diff] [blame] | 234 | return Decorators(items) |
Tim Peters | 6db15d7 | 2004-08-04 02:36:18 +0000 | [diff] [blame] | 235 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 236 | def funcdef(self, nodelist): |
Anthony Baxter | c2a5a63 | 2004-08-02 06:10:11 +0000 | [diff] [blame] | 237 | # -6 -5 -4 -3 -2 -1 |
| 238 | # funcdef: [decorators] 'def' NAME parameters ':' suite |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 239 | # parameters: '(' [varargslist] ')' |
| 240 | |
Anthony Baxter | c2a5a63 | 2004-08-02 06:10:11 +0000 | [diff] [blame] | 241 | if len(nodelist) == 6: |
| 242 | assert nodelist[0][0] == symbol.decorators |
| 243 | decorators = self.decorators(nodelist[0][1:]) |
| 244 | else: |
| 245 | assert len(nodelist) == 5 |
| 246 | decorators = None |
Tim Peters | 6db15d7 | 2004-08-04 02:36:18 +0000 | [diff] [blame] | 247 | |
Anthony Baxter | c2a5a63 | 2004-08-02 06:10:11 +0000 | [diff] [blame] | 248 | lineno = nodelist[-4][2] |
| 249 | name = nodelist[-4][1] |
| 250 | args = nodelist[-3][2] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 251 | |
| 252 | if args[0] == symbol.varargslist: |
| 253 | names, defaults, flags = self.com_arglist(args[1:]) |
| 254 | else: |
| 255 | names = defaults = () |
| 256 | flags = 0 |
Anthony Baxter | c2a5a63 | 2004-08-02 06:10:11 +0000 | [diff] [blame] | 257 | doc = self.get_docstring(nodelist[-1]) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 258 | |
| 259 | # code for function |
Anthony Baxter | c2a5a63 | 2004-08-02 06:10:11 +0000 | [diff] [blame] | 260 | code = self.com_node(nodelist[-1]) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 261 | |
Jeremy Hylton | a59ac0a | 2000-11-06 03:33:52 +0000 | [diff] [blame] | 262 | if doc is not None: |
| 263 | assert isinstance(code, Stmt) |
| 264 | assert isinstance(code.nodes[0], Discard) |
| 265 | del code.nodes[0] |
Jeremy Hylton | 566d934 | 2004-09-07 15:28:01 +0000 | [diff] [blame] | 266 | return Function(decorators, name, names, defaults, flags, doc, code, |
| 267 | lineno=lineno) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 268 | |
| 269 | def lambdef(self, nodelist): |
| 270 | # lambdef: 'lambda' [varargslist] ':' test |
| 271 | if nodelist[2][0] == symbol.varargslist: |
| 272 | names, defaults, flags = self.com_arglist(nodelist[2][1:]) |
| 273 | else: |
| 274 | names = defaults = () |
| 275 | flags = 0 |
| 276 | |
| 277 | # code for lambda |
| 278 | code = self.com_node(nodelist[-1]) |
| 279 | |
Jeremy Hylton | 566d934 | 2004-09-07 15:28:01 +0000 | [diff] [blame] | 280 | return Lambda(names, defaults, flags, code, lineno=nodelist[1][2]) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 281 | |
| 282 | def classdef(self, nodelist): |
Brett Cannon | f418991 | 2005-04-09 02:30:16 +0000 | [diff] [blame] | 283 | # classdef: 'class' NAME ['(' [testlist] ')'] ':' suite |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 284 | |
| 285 | name = nodelist[1][1] |
| 286 | doc = self.get_docstring(nodelist[-1]) |
| 287 | if nodelist[2][0] == token.COLON: |
| 288 | bases = [] |
Brett Cannon | f418991 | 2005-04-09 02:30:16 +0000 | [diff] [blame] | 289 | elif nodelist[3][0] == token.RPAR: |
| 290 | bases = [] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 291 | else: |
| 292 | bases = self.com_bases(nodelist[3]) |
| 293 | |
| 294 | # code for class |
| 295 | code = self.com_node(nodelist[-1]) |
| 296 | |
Jeremy Hylton | da8db8c | 2001-08-29 17:19:02 +0000 | [diff] [blame] | 297 | if doc is not None: |
| 298 | assert isinstance(code, Stmt) |
| 299 | assert isinstance(code.nodes[0], Discard) |
| 300 | del code.nodes[0] |
| 301 | |
Jeremy Hylton | 566d934 | 2004-09-07 15:28:01 +0000 | [diff] [blame] | 302 | return Class(name, bases, doc, code, lineno=nodelist[1][2]) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 303 | |
| 304 | def stmt(self, nodelist): |
| 305 | return self.com_stmt(nodelist[0]) |
| 306 | |
| 307 | small_stmt = stmt |
| 308 | flow_stmt = stmt |
| 309 | compound_stmt = stmt |
| 310 | |
| 311 | def simple_stmt(self, nodelist): |
| 312 | # small_stmt (';' small_stmt)* [';'] NEWLINE |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 313 | stmts = [] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 314 | for i in range(0, len(nodelist), 2): |
| 315 | self.com_append_stmt(stmts, nodelist[i]) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 316 | return Stmt(stmts) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 317 | |
| 318 | def parameters(self, nodelist): |
Jeremy Hylton | 566d934 | 2004-09-07 15:28:01 +0000 | [diff] [blame] | 319 | raise WalkerEror |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 320 | |
| 321 | def varargslist(self, nodelist): |
Jeremy Hylton | 566d934 | 2004-09-07 15:28:01 +0000 | [diff] [blame] | 322 | raise WalkerEror |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 323 | |
| 324 | def fpdef(self, nodelist): |
Jeremy Hylton | 566d934 | 2004-09-07 15:28:01 +0000 | [diff] [blame] | 325 | raise WalkerEror |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 326 | |
| 327 | def fplist(self, nodelist): |
Jeremy Hylton | 566d934 | 2004-09-07 15:28:01 +0000 | [diff] [blame] | 328 | raise WalkerEror |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 329 | |
| 330 | def dotted_name(self, nodelist): |
Jeremy Hylton | 566d934 | 2004-09-07 15:28:01 +0000 | [diff] [blame] | 331 | raise WalkerEror |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 332 | |
| 333 | def comp_op(self, nodelist): |
Jeremy Hylton | 566d934 | 2004-09-07 15:28:01 +0000 | [diff] [blame] | 334 | raise WalkerEror |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 335 | |
| 336 | def trailer(self, nodelist): |
Jeremy Hylton | 566d934 | 2004-09-07 15:28:01 +0000 | [diff] [blame] | 337 | raise WalkerEror |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 338 | |
| 339 | def sliceop(self, nodelist): |
Jeremy Hylton | 566d934 | 2004-09-07 15:28:01 +0000 | [diff] [blame] | 340 | raise WalkerEror |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 341 | |
| 342 | def argument(self, nodelist): |
Jeremy Hylton | 566d934 | 2004-09-07 15:28:01 +0000 | [diff] [blame] | 343 | raise WalkerEror |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 344 | |
| 345 | # -------------------------------------------------------------- |
| 346 | # |
| 347 | # STATEMENT NODES (invoked by com_node()) |
| 348 | # |
| 349 | |
| 350 | def expr_stmt(self, nodelist): |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 351 | # augassign testlist | testlist ('=' testlist)* |
Jeremy Hylton | 7e30c9b | 2001-08-27 21:02:51 +0000 | [diff] [blame] | 352 | en = nodelist[-1] |
| 353 | exprNode = self.lookup_node(en)(en[1:]) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 354 | if len(nodelist) == 1: |
Jeremy Hylton | 566d934 | 2004-09-07 15:28:01 +0000 | [diff] [blame] | 355 | return Discard(exprNode, lineno=exprNode.lineno) |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 356 | if nodelist[1][0] == token.EQUAL: |
Martin v. Löwis | 51e234a | 2002-02-28 17:48:48 +0000 | [diff] [blame] | 357 | nodesl = [] |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 358 | for i in range(0, len(nodelist) - 2, 2): |
Martin v. Löwis | 51e234a | 2002-02-28 17:48:48 +0000 | [diff] [blame] | 359 | nodesl.append(self.com_assign(nodelist[i], OP_ASSIGN)) |
Jeremy Hylton | 566d934 | 2004-09-07 15:28:01 +0000 | [diff] [blame] | 360 | return Assign(nodesl, exprNode, lineno=nodelist[1][2]) |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 361 | else: |
| 362 | lval = self.com_augassign(nodelist[0]) |
| 363 | op = self.com_augassign_op(nodelist[1]) |
Jeremy Hylton | 566d934 | 2004-09-07 15:28:01 +0000 | [diff] [blame] | 364 | return AugAssign(lval, op[1], exprNode, lineno=op[2]) |
| 365 | raise WalkerError, "can't get here" |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 366 | |
| 367 | def print_stmt(self, nodelist): |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 368 | # print ([ test (',' test)* [','] ] | '>>' test [ (',' test)+ [','] ]) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 369 | items = [] |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 370 | if len(nodelist) == 1: |
| 371 | start = 1 |
| 372 | dest = None |
| 373 | elif nodelist[1][0] == token.RIGHTSHIFT: |
| 374 | assert len(nodelist) == 3 \ |
| 375 | or nodelist[3][0] == token.COMMA |
| 376 | dest = self.com_node(nodelist[2]) |
| 377 | start = 4 |
| 378 | else: |
| 379 | dest = None |
| 380 | start = 1 |
| 381 | for i in range(start, len(nodelist), 2): |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 382 | items.append(self.com_node(nodelist[i])) |
| 383 | if nodelist[-1][0] == token.COMMA: |
Jeremy Hylton | 566d934 | 2004-09-07 15:28:01 +0000 | [diff] [blame] | 384 | return Print(items, dest, lineno=nodelist[0][2]) |
| 385 | return Printnl(items, dest, lineno=nodelist[0][2]) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 386 | |
| 387 | def del_stmt(self, nodelist): |
| 388 | return self.com_assign(nodelist[1], OP_DELETE) |
| 389 | |
| 390 | def pass_stmt(self, nodelist): |
Jeremy Hylton | 566d934 | 2004-09-07 15:28:01 +0000 | [diff] [blame] | 391 | return Pass(lineno=nodelist[0][2]) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 392 | |
| 393 | def break_stmt(self, nodelist): |
Jeremy Hylton | 566d934 | 2004-09-07 15:28:01 +0000 | [diff] [blame] | 394 | return Break(lineno=nodelist[0][2]) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 395 | |
| 396 | def continue_stmt(self, nodelist): |
Jeremy Hylton | 566d934 | 2004-09-07 15:28:01 +0000 | [diff] [blame] | 397 | return Continue(lineno=nodelist[0][2]) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 398 | |
| 399 | def return_stmt(self, nodelist): |
| 400 | # return: [testlist] |
| 401 | if len(nodelist) < 2: |
Jeremy Hylton | 566d934 | 2004-09-07 15:28:01 +0000 | [diff] [blame] | 402 | return Return(Const(None), lineno=nodelist[0][2]) |
| 403 | return Return(self.com_node(nodelist[1]), lineno=nodelist[0][2]) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 404 | |
Jeremy Hylton | ec92734 | 2001-08-18 00:04:31 +0000 | [diff] [blame] | 405 | def yield_stmt(self, nodelist): |
Jeremy Hylton | 566d934 | 2004-09-07 15:28:01 +0000 | [diff] [blame] | 406 | return Yield(self.com_node(nodelist[1]), lineno=nodelist[0][2]) |
Jeremy Hylton | ec92734 | 2001-08-18 00:04:31 +0000 | [diff] [blame] | 407 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 408 | def raise_stmt(self, nodelist): |
| 409 | # raise: [test [',' test [',' test]]] |
| 410 | if len(nodelist) > 5: |
| 411 | expr3 = self.com_node(nodelist[5]) |
| 412 | else: |
| 413 | expr3 = None |
| 414 | if len(nodelist) > 3: |
| 415 | expr2 = self.com_node(nodelist[3]) |
| 416 | else: |
| 417 | expr2 = None |
| 418 | if len(nodelist) > 1: |
| 419 | expr1 = self.com_node(nodelist[1]) |
| 420 | else: |
| 421 | expr1 = None |
Jeremy Hylton | 566d934 | 2004-09-07 15:28:01 +0000 | [diff] [blame] | 422 | return Raise(expr1, expr2, expr3, lineno=nodelist[0][2]) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 423 | |
| 424 | def import_stmt(self, nodelist): |
Anthony Baxter | 1a4ddae | 2004-08-31 10:07:13 +0000 | [diff] [blame] | 425 | # import_stmt: import_name | import_from |
| 426 | assert len(nodelist) == 1 |
| 427 | return self.com_node(nodelist[0]) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 428 | |
Anthony Baxter | 1a4ddae | 2004-08-31 10:07:13 +0000 | [diff] [blame] | 429 | def import_name(self, nodelist): |
| 430 | # import_name: 'import' dotted_as_names |
Tim Peters | 0e9980f | 2004-09-12 03:49:31 +0000 | [diff] [blame] | 431 | return Import(self.com_dotted_as_names(nodelist[1]), |
Jeremy Hylton | 566d934 | 2004-09-07 15:28:01 +0000 | [diff] [blame] | 432 | lineno=nodelist[0][2]) |
Anthony Baxter | 1a4ddae | 2004-08-31 10:07:13 +0000 | [diff] [blame] | 433 | |
| 434 | def import_from(self, nodelist): |
| 435 | # import_from: 'from' dotted_name 'import' ('*' | |
| 436 | # '(' import_as_names ')' | import_as_names) |
| 437 | assert nodelist[0][1] == 'from' |
| 438 | assert nodelist[1][0] == symbol.dotted_name |
| 439 | assert nodelist[2][1] == 'import' |
| 440 | fromname = self.com_dotted_name(nodelist[1]) |
| 441 | if nodelist[3][0] == token.STAR: |
Michael W. Hudson | 05522ad | 2004-11-08 12:17:34 +0000 | [diff] [blame] | 442 | return From(fromname, [('*', None)], |
| 443 | lineno=nodelist[0][2]) |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 444 | else: |
Anthony Baxter | 1a4ddae | 2004-08-31 10:07:13 +0000 | [diff] [blame] | 445 | node = nodelist[3 + (nodelist[3][0] == token.LPAR)] |
Jeremy Hylton | 566d934 | 2004-09-07 15:28:01 +0000 | [diff] [blame] | 446 | return From(fromname, self.com_import_as_names(node), |
| 447 | lineno=nodelist[0][2]) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 448 | |
| 449 | def global_stmt(self, nodelist): |
| 450 | # global: NAME (',' NAME)* |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 451 | names = [] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 452 | for i in range(1, len(nodelist), 2): |
| 453 | names.append(nodelist[i][1]) |
Jeremy Hylton | 566d934 | 2004-09-07 15:28:01 +0000 | [diff] [blame] | 454 | return Global(names, lineno=nodelist[0][2]) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 455 | |
| 456 | def exec_stmt(self, nodelist): |
| 457 | # exec_stmt: 'exec' expr ['in' expr [',' expr]] |
| 458 | expr1 = self.com_node(nodelist[1]) |
| 459 | if len(nodelist) >= 4: |
| 460 | expr2 = self.com_node(nodelist[3]) |
| 461 | if len(nodelist) >= 6: |
| 462 | expr3 = self.com_node(nodelist[5]) |
| 463 | else: |
| 464 | expr3 = None |
| 465 | else: |
| 466 | expr2 = expr3 = None |
| 467 | |
Jeremy Hylton | 566d934 | 2004-09-07 15:28:01 +0000 | [diff] [blame] | 468 | return Exec(expr1, expr2, expr3, lineno=nodelist[0][2]) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 469 | |
| 470 | def assert_stmt(self, nodelist): |
| 471 | # 'assert': test, [',' test] |
| 472 | expr1 = self.com_node(nodelist[1]) |
| 473 | if (len(nodelist) == 4): |
| 474 | expr2 = self.com_node(nodelist[3]) |
| 475 | else: |
Jeremy Hylton | a59ac0a | 2000-11-06 03:33:52 +0000 | [diff] [blame] | 476 | expr2 = None |
Jeremy Hylton | 566d934 | 2004-09-07 15:28:01 +0000 | [diff] [blame] | 477 | return Assert(expr1, expr2, lineno=nodelist[0][2]) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 478 | |
| 479 | def if_stmt(self, nodelist): |
| 480 | # if: test ':' suite ('elif' test ':' suite)* ['else' ':' suite] |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 481 | tests = [] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 482 | for i in range(0, len(nodelist) - 3, 4): |
| 483 | testNode = self.com_node(nodelist[i + 1]) |
| 484 | suiteNode = self.com_node(nodelist[i + 3]) |
| 485 | tests.append((testNode, suiteNode)) |
| 486 | |
| 487 | if len(nodelist) % 4 == 3: |
| 488 | elseNode = self.com_node(nodelist[-1]) |
| 489 | ## elseNode.lineno = nodelist[-1][1][2] |
| 490 | else: |
| 491 | elseNode = None |
Jeremy Hylton | 566d934 | 2004-09-07 15:28:01 +0000 | [diff] [blame] | 492 | return If(tests, elseNode, lineno=nodelist[0][2]) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 493 | |
| 494 | def while_stmt(self, nodelist): |
| 495 | # 'while' test ':' suite ['else' ':' suite] |
| 496 | |
| 497 | testNode = self.com_node(nodelist[1]) |
| 498 | bodyNode = self.com_node(nodelist[3]) |
| 499 | |
| 500 | if len(nodelist) > 4: |
| 501 | elseNode = self.com_node(nodelist[6]) |
| 502 | else: |
| 503 | elseNode = None |
| 504 | |
Jeremy Hylton | 566d934 | 2004-09-07 15:28:01 +0000 | [diff] [blame] | 505 | return While(testNode, bodyNode, elseNode, lineno=nodelist[0][2]) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 506 | |
| 507 | def for_stmt(self, nodelist): |
| 508 | # 'for' exprlist 'in' exprlist ':' suite ['else' ':' suite] |
| 509 | |
| 510 | assignNode = self.com_assign(nodelist[1], OP_ASSIGN) |
| 511 | listNode = self.com_node(nodelist[3]) |
| 512 | bodyNode = self.com_node(nodelist[5]) |
| 513 | |
| 514 | if len(nodelist) > 8: |
| 515 | elseNode = self.com_node(nodelist[8]) |
| 516 | else: |
| 517 | elseNode = None |
| 518 | |
Tim Peters | 0e9980f | 2004-09-12 03:49:31 +0000 | [diff] [blame] | 519 | return For(assignNode, listNode, bodyNode, elseNode, |
Jeremy Hylton | 566d934 | 2004-09-07 15:28:01 +0000 | [diff] [blame] | 520 | lineno=nodelist[0][2]) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 521 | |
| 522 | def try_stmt(self, nodelist): |
| 523 | # 'try' ':' suite (except_clause ':' suite)+ ['else' ':' suite] |
| 524 | # | 'try' ':' suite 'finally' ':' suite |
| 525 | if nodelist[3][0] != symbol.except_clause: |
| 526 | return self.com_try_finally(nodelist) |
| 527 | |
| 528 | return self.com_try_except(nodelist) |
| 529 | |
| 530 | def suite(self, nodelist): |
| 531 | # simple_stmt | NEWLINE INDENT NEWLINE* (stmt NEWLINE*)+ DEDENT |
| 532 | if len(nodelist) == 1: |
| 533 | return self.com_stmt(nodelist[0]) |
| 534 | |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 535 | stmts = [] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 536 | for node in nodelist: |
| 537 | if node[0] == symbol.stmt: |
| 538 | self.com_append_stmt(stmts, node) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 539 | return Stmt(stmts) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 540 | |
| 541 | # -------------------------------------------------------------- |
| 542 | # |
| 543 | # EXPRESSION NODES (invoked by com_node()) |
| 544 | # |
| 545 | |
| 546 | def testlist(self, nodelist): |
| 547 | # testlist: expr (',' expr)* [','] |
Jeremy Hylton | d114261 | 2001-10-17 13:32:52 +0000 | [diff] [blame] | 548 | # testlist_safe: test [(',' test)+ [',']] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 549 | # exprlist: expr (',' expr)* [','] |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 550 | return self.com_binary(Tuple, nodelist) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 551 | |
Jeremy Hylton | d114261 | 2001-10-17 13:32:52 +0000 | [diff] [blame] | 552 | testlist_safe = testlist # XXX |
Jeremy Hylton | accb62b | 2002-12-31 18:17:44 +0000 | [diff] [blame] | 553 | testlist1 = testlist |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 554 | exprlist = testlist |
| 555 | |
Raymond Hettinger | 354433a | 2004-05-19 08:20:33 +0000 | [diff] [blame] | 556 | def testlist_gexp(self, nodelist): |
| 557 | if len(nodelist) == 2 and nodelist[1][0] == symbol.gen_for: |
| 558 | test = self.com_node(nodelist[0]) |
| 559 | return self.com_generator_expression(test, nodelist[1]) |
| 560 | return self.testlist(nodelist) |
| 561 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 562 | def test(self, nodelist): |
| 563 | # and_test ('or' and_test)* | lambdef |
| 564 | if len(nodelist) == 1 and nodelist[0][0] == symbol.lambdef: |
| 565 | return self.lambdef(nodelist[0]) |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 566 | return self.com_binary(Or, nodelist) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 567 | |
| 568 | def and_test(self, nodelist): |
| 569 | # not_test ('and' not_test)* |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 570 | return self.com_binary(And, nodelist) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 571 | |
| 572 | def not_test(self, nodelist): |
| 573 | # 'not' not_test | comparison |
| 574 | result = self.com_node(nodelist[-1]) |
| 575 | if len(nodelist) == 2: |
Jeremy Hylton | 566d934 | 2004-09-07 15:28:01 +0000 | [diff] [blame] | 576 | return Not(result, lineno=nodelist[0][2]) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 577 | return result |
| 578 | |
| 579 | def comparison(self, nodelist): |
| 580 | # comparison: expr (comp_op expr)* |
| 581 | node = self.com_node(nodelist[0]) |
| 582 | if len(nodelist) == 1: |
| 583 | return node |
| 584 | |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 585 | results = [] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 586 | for i in range(2, len(nodelist), 2): |
| 587 | nl = nodelist[i-1] |
| 588 | |
| 589 | # comp_op: '<' | '>' | '=' | '>=' | '<=' | '<>' | '!=' | '==' |
| 590 | # | 'in' | 'not' 'in' | 'is' | 'is' 'not' |
| 591 | n = nl[1] |
| 592 | if n[0] == token.NAME: |
| 593 | type = n[1] |
| 594 | if len(nl) == 3: |
| 595 | if type == 'not': |
| 596 | type = 'not in' |
| 597 | else: |
| 598 | type = 'is not' |
| 599 | else: |
| 600 | type = _cmp_types[n[0]] |
| 601 | |
| 602 | lineno = nl[1][2] |
| 603 | results.append((type, self.com_node(nodelist[i]))) |
| 604 | |
| 605 | # we need a special "compare" node so that we can distinguish |
| 606 | # 3 < x < 5 from (3 < x) < 5 |
| 607 | # the two have very different semantics and results (note that the |
| 608 | # latter form is always true) |
| 609 | |
Jeremy Hylton | 566d934 | 2004-09-07 15:28:01 +0000 | [diff] [blame] | 610 | return Compare(node, results, lineno=lineno) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 611 | |
| 612 | def expr(self, nodelist): |
| 613 | # xor_expr ('|' xor_expr)* |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 614 | return self.com_binary(Bitor, nodelist) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 615 | |
| 616 | def xor_expr(self, nodelist): |
| 617 | # xor_expr ('^' xor_expr)* |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 618 | return self.com_binary(Bitxor, nodelist) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 619 | |
| 620 | def and_expr(self, nodelist): |
| 621 | # xor_expr ('&' xor_expr)* |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 622 | return self.com_binary(Bitand, nodelist) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 623 | |
| 624 | def shift_expr(self, nodelist): |
| 625 | # shift_expr ('<<'|'>>' shift_expr)* |
| 626 | node = self.com_node(nodelist[0]) |
| 627 | for i in range(2, len(nodelist), 2): |
| 628 | right = self.com_node(nodelist[i]) |
| 629 | if nodelist[i-1][0] == token.LEFTSHIFT: |
Jeremy Hylton | 566d934 | 2004-09-07 15:28:01 +0000 | [diff] [blame] | 630 | node = LeftShift([node, right], lineno=nodelist[1][2]) |
Jeremy Hylton | 7abf520 | 2001-08-29 18:12:30 +0000 | [diff] [blame] | 631 | elif nodelist[i-1][0] == token.RIGHTSHIFT: |
Jeremy Hylton | 566d934 | 2004-09-07 15:28:01 +0000 | [diff] [blame] | 632 | node = RightShift([node, right], lineno=nodelist[1][2]) |
Jeremy Hylton | 7abf520 | 2001-08-29 18:12:30 +0000 | [diff] [blame] | 633 | else: |
| 634 | raise ValueError, "unexpected token: %s" % nodelist[i-1][0] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 635 | return node |
| 636 | |
| 637 | def arith_expr(self, nodelist): |
| 638 | node = self.com_node(nodelist[0]) |
| 639 | for i in range(2, len(nodelist), 2): |
| 640 | right = self.com_node(nodelist[i]) |
| 641 | if nodelist[i-1][0] == token.PLUS: |
Jeremy Hylton | 566d934 | 2004-09-07 15:28:01 +0000 | [diff] [blame] | 642 | node = Add([node, right], lineno=nodelist[1][2]) |
Jeremy Hylton | 7abf520 | 2001-08-29 18:12:30 +0000 | [diff] [blame] | 643 | elif nodelist[i-1][0] == token.MINUS: |
Jeremy Hylton | 566d934 | 2004-09-07 15:28:01 +0000 | [diff] [blame] | 644 | node = Sub([node, right], lineno=nodelist[1][2]) |
Jeremy Hylton | 7abf520 | 2001-08-29 18:12:30 +0000 | [diff] [blame] | 645 | else: |
| 646 | raise ValueError, "unexpected token: %s" % nodelist[i-1][0] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 647 | return node |
| 648 | |
| 649 | def term(self, nodelist): |
| 650 | node = self.com_node(nodelist[0]) |
| 651 | for i in range(2, len(nodelist), 2): |
| 652 | right = self.com_node(nodelist[i]) |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 653 | t = nodelist[i-1][0] |
| 654 | if t == token.STAR: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 655 | node = Mul([node, right]) |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 656 | elif t == token.SLASH: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 657 | node = Div([node, right]) |
Jeremy Hylton | 7abf520 | 2001-08-29 18:12:30 +0000 | [diff] [blame] | 658 | elif t == token.PERCENT: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 659 | node = Mod([node, right]) |
Jeremy Hylton | 7abf520 | 2001-08-29 18:12:30 +0000 | [diff] [blame] | 660 | elif t == token.DOUBLESLASH: |
| 661 | node = FloorDiv([node, right]) |
| 662 | else: |
| 663 | raise ValueError, "unexpected token: %s" % t |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 664 | node.lineno = nodelist[1][2] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 665 | return node |
| 666 | |
| 667 | def factor(self, nodelist): |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 668 | elt = nodelist[0] |
| 669 | t = elt[0] |
Jeremy Hylton | 566d934 | 2004-09-07 15:28:01 +0000 | [diff] [blame] | 670 | node = self.lookup_node(nodelist[-1])(nodelist[-1][1:]) |
Jeremy Hylton | accb62b | 2002-12-31 18:17:44 +0000 | [diff] [blame] | 671 | # need to handle (unary op)constant here... |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 672 | if t == token.PLUS: |
Jeremy Hylton | 566d934 | 2004-09-07 15:28:01 +0000 | [diff] [blame] | 673 | return UnaryAdd(node, lineno=elt[2]) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 674 | elif t == token.MINUS: |
Jeremy Hylton | 566d934 | 2004-09-07 15:28:01 +0000 | [diff] [blame] | 675 | return UnarySub(node, lineno=elt[2]) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 676 | elif t == token.TILDE: |
Jeremy Hylton | 566d934 | 2004-09-07 15:28:01 +0000 | [diff] [blame] | 677 | node = Invert(node, lineno=elt[2]) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 678 | return node |
| 679 | |
| 680 | def power(self, nodelist): |
| 681 | # power: atom trailer* ('**' factor)* |
| 682 | node = self.com_node(nodelist[0]) |
| 683 | for i in range(1, len(nodelist)): |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 684 | elt = nodelist[i] |
| 685 | if elt[0] == token.DOUBLESTAR: |
Jeremy Hylton | 566d934 | 2004-09-07 15:28:01 +0000 | [diff] [blame] | 686 | return Power([node, self.com_node(nodelist[i+1])], |
| 687 | lineno=elt[2]) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 688 | |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 689 | node = self.com_apply_trailer(node, elt) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 690 | |
| 691 | return node |
| 692 | |
| 693 | def atom(self, nodelist): |
Jeremy Hylton | 566d934 | 2004-09-07 15:28:01 +0000 | [diff] [blame] | 694 | return self._atom_dispatch[nodelist[0][0]](nodelist) |
Jeremy Hylton | 7845cf8 | 2001-08-29 20:56:30 +0000 | [diff] [blame] | 695 | n.lineno = nodelist[0][2] |
| 696 | return n |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 697 | |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 698 | def atom_lpar(self, nodelist): |
| 699 | if nodelist[1][0] == token.RPAR: |
Jeremy Hylton | 566d934 | 2004-09-07 15:28:01 +0000 | [diff] [blame] | 700 | return Tuple(()) |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 701 | return self.com_node(nodelist[1]) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 702 | |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 703 | def atom_lsqb(self, nodelist): |
| 704 | if nodelist[1][0] == token.RSQB: |
Jeremy Hylton | 566d934 | 2004-09-07 15:28:01 +0000 | [diff] [blame] | 705 | return List(()) |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 706 | return self.com_list_constructor(nodelist[1]) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 707 | |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 708 | def atom_lbrace(self, nodelist): |
| 709 | if nodelist[1][0] == token.RBRACE: |
| 710 | return Dict(()) |
| 711 | return self.com_dictmaker(nodelist[1]) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 712 | |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 713 | def atom_backquote(self, nodelist): |
Jeremy Hylton | 566d934 | 2004-09-07 15:28:01 +0000 | [diff] [blame] | 714 | return Backquote(self.com_node(nodelist[1])) |
Tim Peters | e0c446b | 2001-10-18 21:57:37 +0000 | [diff] [blame] | 715 | |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 716 | def atom_number(self, nodelist): |
| 717 | ### need to verify this matches compile.c |
| 718 | k = eval(nodelist[0][1]) |
Jeremy Hylton | 566d934 | 2004-09-07 15:28:01 +0000 | [diff] [blame] | 719 | return Const(k, lineno=nodelist[0][2]) |
Tim Peters | e0c446b | 2001-10-18 21:57:37 +0000 | [diff] [blame] | 720 | |
Jeremy Hylton | accb62b | 2002-12-31 18:17:44 +0000 | [diff] [blame] | 721 | def decode_literal(self, lit): |
| 722 | if self.encoding: |
| 723 | # this is particularly fragile & a bit of a |
| 724 | # hack... changes in compile.c:parsestr and |
| 725 | # tokenizer.c must be reflected here. |
| 726 | if self.encoding not in ['utf-8', 'iso-8859-1']: |
| 727 | lit = unicode(lit, 'utf-8').encode(self.encoding) |
| 728 | return eval("# coding: %s\n%s" % (self.encoding, lit)) |
| 729 | else: |
| 730 | return eval(lit) |
| 731 | |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 732 | def atom_string(self, nodelist): |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 733 | k = '' |
| 734 | for node in nodelist: |
Jeremy Hylton | accb62b | 2002-12-31 18:17:44 +0000 | [diff] [blame] | 735 | k += self.decode_literal(node[1]) |
Jeremy Hylton | 566d934 | 2004-09-07 15:28:01 +0000 | [diff] [blame] | 736 | return Const(k, lineno=nodelist[0][2]) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 737 | |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 738 | def atom_name(self, nodelist): |
Jeremy Hylton | 566d934 | 2004-09-07 15:28:01 +0000 | [diff] [blame] | 739 | return Name(nodelist[0][1], lineno=nodelist[0][2]) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 740 | |
| 741 | # -------------------------------------------------------------- |
| 742 | # |
| 743 | # INTERNAL PARSING UTILITIES |
| 744 | # |
| 745 | |
Jeremy Hylton | 7e30c9b | 2001-08-27 21:02:51 +0000 | [diff] [blame] | 746 | # The use of com_node() introduces a lot of extra stack frames, |
| 747 | # enough to cause a stack overflow compiling test.test_parser with |
| 748 | # the standard interpreter recursionlimit. The com_node() is a |
| 749 | # convenience function that hides the dispatch details, but comes |
| 750 | # at a very high cost. It is more efficient to dispatch directly |
| 751 | # in the callers. In these cases, use lookup_node() and call the |
| 752 | # dispatched node directly. |
| 753 | |
| 754 | def lookup_node(self, node): |
| 755 | return self._dispatch[node[0]] |
| 756 | |
Jeremy Hylton | 566d934 | 2004-09-07 15:28:01 +0000 | [diff] [blame] | 757 | _callers = {} |
| 758 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 759 | def com_node(self, node): |
| 760 | # Note: compile.c has handling in com_node for del_stmt, pass_stmt, |
| 761 | # break_stmt, stmt, small_stmt, flow_stmt, simple_stmt, |
| 762 | # and compound_stmt. |
| 763 | # We'll just dispatch them. |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 764 | return self._dispatch[node[0]](node[1:]) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 765 | |
Jeremy Hylton | 42a0830 | 2001-04-09 04:27:12 +0000 | [diff] [blame] | 766 | def com_NEWLINE(self, *args): |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 767 | # A ';' at the end of a line can make a NEWLINE token appear |
| 768 | # here, Render it harmless. (genc discards ('discard', |
| 769 | # ('const', xxxx)) Nodes) |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 770 | return Discard(Const(None)) |
Tim Peters | e0c446b | 2001-10-18 21:57:37 +0000 | [diff] [blame] | 771 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 772 | def com_arglist(self, nodelist): |
| 773 | # varargslist: |
Jeremy Hylton | 8d22b04 | 2002-04-19 22:56:37 +0000 | [diff] [blame] | 774 | # (fpdef ['=' test] ',')* ('*' NAME [',' '**' NAME] | '**' NAME) |
| 775 | # | fpdef ['=' test] (',' fpdef ['=' test])* [','] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 776 | # fpdef: NAME | '(' fplist ')' |
| 777 | # fplist: fpdef (',' fpdef)* [','] |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 778 | names = [] |
| 779 | defaults = [] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 780 | flags = 0 |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 781 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 782 | i = 0 |
| 783 | while i < len(nodelist): |
| 784 | node = nodelist[i] |
| 785 | if node[0] == token.STAR or node[0] == token.DOUBLESTAR: |
| 786 | if node[0] == token.STAR: |
| 787 | node = nodelist[i+1] |
| 788 | if node[0] == token.NAME: |
| 789 | names.append(node[1]) |
| 790 | flags = flags | CO_VARARGS |
| 791 | i = i + 3 |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 792 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 793 | if i < len(nodelist): |
Jeremy Hylton | 8d22b04 | 2002-04-19 22:56:37 +0000 | [diff] [blame] | 794 | # should be DOUBLESTAR |
Jeremy Hylton | 7abf520 | 2001-08-29 18:12:30 +0000 | [diff] [blame] | 795 | t = nodelist[i][0] |
| 796 | if t == token.DOUBLESTAR: |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 797 | node = nodelist[i+1] |
Jeremy Hylton | 7abf520 | 2001-08-29 18:12:30 +0000 | [diff] [blame] | 798 | else: |
| 799 | raise ValueError, "unexpected token: %s" % t |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 800 | names.append(node[1]) |
| 801 | flags = flags | CO_VARKEYWORDS |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 802 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 803 | break |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 804 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 805 | # fpdef: NAME | '(' fplist ')' |
| 806 | names.append(self.com_fpdef(node)) |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 807 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 808 | i = i + 1 |
| 809 | if i >= len(nodelist): |
| 810 | break |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 811 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 812 | if nodelist[i][0] == token.EQUAL: |
| 813 | defaults.append(self.com_node(nodelist[i + 1])) |
| 814 | i = i + 2 |
| 815 | elif len(defaults): |
Jeremy Hylton | 8f00a24 | 2004-09-07 15:36:48 +0000 | [diff] [blame] | 816 | # XXX This should be a syntax error. |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 817 | # Treat "(a=1, b)" as "(a=1, b=None)" |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 818 | defaults.append(Const(None)) |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 819 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 820 | i = i + 1 |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 821 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 822 | return names, defaults, flags |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 823 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 824 | def com_fpdef(self, node): |
| 825 | # fpdef: NAME | '(' fplist ')' |
| 826 | if node[1][0] == token.LPAR: |
| 827 | return self.com_fplist(node[2]) |
| 828 | return node[1][1] |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 829 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 830 | def com_fplist(self, node): |
Tim Peters | e0c446b | 2001-10-18 21:57:37 +0000 | [diff] [blame] | 831 | # fplist: fpdef (',' fpdef)* [','] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 832 | if len(node) == 2: |
| 833 | return self.com_fpdef(node[1]) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 834 | list = [] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 835 | for i in range(1, len(node), 2): |
| 836 | list.append(self.com_fpdef(node[i])) |
| 837 | return tuple(list) |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 838 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 839 | def com_dotted_name(self, node): |
| 840 | # String together the dotted names and return the string |
| 841 | name = "" |
| 842 | for n in node: |
| 843 | if type(n) == type(()) and n[0] == 1: |
| 844 | name = name + n[1] + '.' |
| 845 | return name[:-1] |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 846 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 847 | def com_dotted_as_name(self, node): |
Anthony Baxter | 1a4ddae | 2004-08-31 10:07:13 +0000 | [diff] [blame] | 848 | assert node[0] == symbol.dotted_as_name |
| 849 | node = node[1:] |
| 850 | dot = self.com_dotted_name(node[0][1:]) |
| 851 | if len(node) == 1: |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 852 | return dot, None |
Anthony Baxter | 1a4ddae | 2004-08-31 10:07:13 +0000 | [diff] [blame] | 853 | assert node[1][1] == 'as' |
| 854 | assert node[2][0] == token.NAME |
| 855 | return dot, node[2][1] |
| 856 | |
| 857 | def com_dotted_as_names(self, node): |
| 858 | assert node[0] == symbol.dotted_as_names |
| 859 | node = node[1:] |
| 860 | names = [self.com_dotted_as_name(node[0])] |
| 861 | for i in range(2, len(node), 2): |
| 862 | names.append(self.com_dotted_as_name(node[i])) |
| 863 | return names |
Jeremy Hylton | 2051608 | 2000-09-01 20:33:26 +0000 | [diff] [blame] | 864 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 865 | def com_import_as_name(self, node): |
Jeremy Hylton | 42a0830 | 2001-04-09 04:27:12 +0000 | [diff] [blame] | 866 | assert node[0] == symbol.import_as_name |
| 867 | node = node[1:] |
Anthony Baxter | 1a4ddae | 2004-08-31 10:07:13 +0000 | [diff] [blame] | 868 | assert node[0][0] == token.NAME |
Jeremy Hylton | 42a0830 | 2001-04-09 04:27:12 +0000 | [diff] [blame] | 869 | if len(node) == 1: |
Jeremy Hylton | 42a0830 | 2001-04-09 04:27:12 +0000 | [diff] [blame] | 870 | return node[0][1], None |
Jeremy Hylton | 42a0830 | 2001-04-09 04:27:12 +0000 | [diff] [blame] | 871 | assert node[1][1] == 'as', node |
| 872 | assert node[2][0] == token.NAME |
| 873 | return node[0][1], node[2][1] |
Jeremy Hylton | 2051608 | 2000-09-01 20:33:26 +0000 | [diff] [blame] | 874 | |
Anthony Baxter | 1a4ddae | 2004-08-31 10:07:13 +0000 | [diff] [blame] | 875 | def com_import_as_names(self, node): |
| 876 | assert node[0] == symbol.import_as_names |
| 877 | node = node[1:] |
| 878 | names = [self.com_import_as_name(node[0])] |
| 879 | for i in range(2, len(node), 2): |
| 880 | names.append(self.com_import_as_name(node[i])) |
| 881 | return names |
| 882 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 883 | def com_bases(self, node): |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 884 | bases = [] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 885 | for i in range(1, len(node), 2): |
| 886 | bases.append(self.com_node(node[i])) |
| 887 | return bases |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 888 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 889 | def com_try_finally(self, nodelist): |
| 890 | # try_fin_stmt: "try" ":" suite "finally" ":" suite |
Jeremy Hylton | 566d934 | 2004-09-07 15:28:01 +0000 | [diff] [blame] | 891 | return TryFinally(self.com_node(nodelist[2]), |
Tim Peters | 0e9980f | 2004-09-12 03:49:31 +0000 | [diff] [blame] | 892 | self.com_node(nodelist[5]), |
Jeremy Hylton | 566d934 | 2004-09-07 15:28:01 +0000 | [diff] [blame] | 893 | lineno=nodelist[0][2]) |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 894 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 895 | def com_try_except(self, nodelist): |
| 896 | # try_except: 'try' ':' suite (except_clause ':' suite)* ['else' suite] |
| 897 | #tryexcept: [TryNode, [except_clauses], elseNode)] |
| 898 | stmt = self.com_node(nodelist[2]) |
| 899 | clauses = [] |
| 900 | elseNode = None |
| 901 | for i in range(3, len(nodelist), 3): |
| 902 | node = nodelist[i] |
| 903 | if node[0] == symbol.except_clause: |
| 904 | # except_clause: 'except' [expr [',' expr]] */ |
| 905 | if len(node) > 2: |
| 906 | expr1 = self.com_node(node[2]) |
| 907 | if len(node) > 4: |
| 908 | expr2 = self.com_assign(node[4], OP_ASSIGN) |
| 909 | else: |
| 910 | expr2 = None |
| 911 | else: |
| 912 | expr1 = expr2 = None |
| 913 | clauses.append((expr1, expr2, self.com_node(nodelist[i+2]))) |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 914 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 915 | if node[0] == token.NAME: |
| 916 | elseNode = self.com_node(nodelist[i+2]) |
Jeremy Hylton | 566d934 | 2004-09-07 15:28:01 +0000 | [diff] [blame] | 917 | return TryExcept(self.com_node(nodelist[2]), clauses, elseNode, |
| 918 | lineno=nodelist[0][2]) |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 919 | |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 920 | def com_augassign_op(self, node): |
| 921 | assert node[0] == symbol.augassign |
| 922 | return node[1] |
| 923 | |
| 924 | def com_augassign(self, node): |
| 925 | """Return node suitable for lvalue of augmented assignment |
| 926 | |
| 927 | Names, slices, and attributes are the only allowable nodes. |
| 928 | """ |
| 929 | l = self.com_node(node) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 930 | if l.__class__ in (Name, Slice, Subscript, Getattr): |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 931 | return l |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 932 | raise SyntaxError, "can't assign to %s" % l.__class__.__name__ |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 933 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 934 | def com_assign(self, node, assigning): |
| 935 | # return a node suitable for use as an "lvalue" |
| 936 | # loop to avoid trivial recursion |
| 937 | while 1: |
| 938 | t = node[0] |
Michael W. Hudson | 3f06189 | 2004-07-12 13:15:56 +0000 | [diff] [blame] | 939 | 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] | 940 | if len(node) > 2: |
| 941 | return self.com_assign_tuple(node, assigning) |
| 942 | node = node[1] |
| 943 | elif t in _assign_types: |
| 944 | if len(node) > 2: |
| 945 | raise SyntaxError, "can't assign to operator" |
| 946 | node = node[1] |
| 947 | elif t == symbol.power: |
| 948 | if node[1][0] != symbol.atom: |
| 949 | raise SyntaxError, "can't assign to operator" |
| 950 | if len(node) > 2: |
| 951 | primary = self.com_node(node[1]) |
| 952 | for i in range(2, len(node)-1): |
| 953 | ch = node[i] |
| 954 | if ch[0] == token.DOUBLESTAR: |
| 955 | raise SyntaxError, "can't assign to operator" |
| 956 | primary = self.com_apply_trailer(primary, ch) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 957 | return self.com_assign_trailer(primary, node[-1], |
Tim Peters | e0c446b | 2001-10-18 21:57:37 +0000 | [diff] [blame] | 958 | assigning) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 959 | node = node[1] |
| 960 | elif t == symbol.atom: |
| 961 | t = node[1][0] |
| 962 | if t == token.LPAR: |
| 963 | node = node[2] |
| 964 | if node[0] == token.RPAR: |
| 965 | raise SyntaxError, "can't assign to ()" |
| 966 | elif t == token.LSQB: |
| 967 | node = node[2] |
| 968 | if node[0] == token.RSQB: |
| 969 | raise SyntaxError, "can't assign to []" |
| 970 | return self.com_assign_list(node, assigning) |
| 971 | elif t == token.NAME: |
| 972 | return self.com_assign_name(node[1], assigning) |
| 973 | else: |
| 974 | raise SyntaxError, "can't assign to literal" |
| 975 | else: |
| 976 | raise SyntaxError, "bad assignment" |
| 977 | |
| 978 | def com_assign_tuple(self, node, assigning): |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 979 | assigns = [] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 980 | for i in range(1, len(node), 2): |
| 981 | assigns.append(self.com_assign(node[i], assigning)) |
Jeremy Hylton | 566d934 | 2004-09-07 15:28:01 +0000 | [diff] [blame] | 982 | return AssTuple(assigns, lineno=extractLineNo(node)) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 983 | |
| 984 | def com_assign_list(self, node, assigning): |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 985 | assigns = [] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 986 | for i in range(1, len(node), 2): |
Jeremy Hylton | 2e4cc7e | 2001-09-17 19:33:48 +0000 | [diff] [blame] | 987 | if i + 1 < len(node): |
| 988 | if node[i + 1][0] == symbol.list_for: |
| 989 | raise SyntaxError, "can't assign to list comprehension" |
| 990 | assert node[i + 1][0] == token.COMMA, node[i + 1] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 991 | assigns.append(self.com_assign(node[i], assigning)) |
Jeremy Hylton | 566d934 | 2004-09-07 15:28:01 +0000 | [diff] [blame] | 992 | return AssList(assigns, lineno=extractLineNo(node)) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 993 | |
| 994 | def com_assign_name(self, node, assigning): |
Jeremy Hylton | 566d934 | 2004-09-07 15:28:01 +0000 | [diff] [blame] | 995 | return AssName(node[1], assigning, lineno=node[2]) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 996 | |
| 997 | def com_assign_trailer(self, primary, node, assigning): |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 998 | t = node[1][0] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 999 | if t == token.DOT: |
| 1000 | return self.com_assign_attr(primary, node[2], assigning) |
| 1001 | if t == token.LSQB: |
| 1002 | return self.com_subscriptlist(primary, node[2], assigning) |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 1003 | if t == token.LPAR: |
| 1004 | raise SyntaxError, "can't assign to function call" |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1005 | raise SyntaxError, "unknown trailer type: %s" % t |
| 1006 | |
| 1007 | def com_assign_attr(self, primary, node, assigning): |
Jeremy Hylton | 566d934 | 2004-09-07 15:28:01 +0000 | [diff] [blame] | 1008 | return AssAttr(primary, node[1], assigning, lineno=node[-1]) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1009 | |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 1010 | def com_binary(self, constructor, nodelist): |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1011 | "Compile 'NODE (OP NODE)*' into (type, [ node1, ..., nodeN ])." |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1012 | l = len(nodelist) |
| 1013 | if l == 1: |
Jeremy Hylton | 7e30c9b | 2001-08-27 21:02:51 +0000 | [diff] [blame] | 1014 | n = nodelist[0] |
| 1015 | return self.lookup_node(n)(n[1:]) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1016 | items = [] |
| 1017 | for i in range(0, l, 2): |
Jeremy Hylton | 7e30c9b | 2001-08-27 21:02:51 +0000 | [diff] [blame] | 1018 | n = nodelist[i] |
| 1019 | items.append(self.lookup_node(n)(n[1:])) |
Jeremy Hylton | 566d934 | 2004-09-07 15:28:01 +0000 | [diff] [blame] | 1020 | return constructor(items, lineno=extractLineNo(nodelist)) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1021 | |
| 1022 | def com_stmt(self, node): |
Jeremy Hylton | 7e30c9b | 2001-08-27 21:02:51 +0000 | [diff] [blame] | 1023 | result = self.lookup_node(node)(node[1:]) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1024 | assert result is not None |
| 1025 | if isinstance(result, Stmt): |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1026 | return result |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1027 | return Stmt([result]) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1028 | |
| 1029 | def com_append_stmt(self, stmts, node): |
Jeremy Hylton | 566d934 | 2004-09-07 15:28:01 +0000 | [diff] [blame] | 1030 | result = self.lookup_node(node)(node[1:]) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1031 | assert result is not None |
| 1032 | if isinstance(result, Stmt): |
| 1033 | stmts.extend(result.nodes) |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1034 | else: |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1035 | stmts.append(result) |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1036 | |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 1037 | if hasattr(symbol, 'list_for'): |
| 1038 | def com_list_constructor(self, nodelist): |
| 1039 | # listmaker: test ( list_for | (',' test)* [','] ) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1040 | values = [] |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 1041 | for i in range(1, len(nodelist)): |
| 1042 | if nodelist[i][0] == symbol.list_for: |
| 1043 | assert len(nodelist[i:]) == 1 |
| 1044 | return self.com_list_comprehension(values[0], |
| 1045 | nodelist[i]) |
| 1046 | elif nodelist[i][0] == token.COMMA: |
| 1047 | continue |
| 1048 | values.append(self.com_node(nodelist[i])) |
Jeremy Hylton | 566d934 | 2004-09-07 15:28:01 +0000 | [diff] [blame] | 1049 | return List(values, lineno=values[0].lineno) |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 1050 | |
| 1051 | def com_list_comprehension(self, expr, node): |
| 1052 | # list_iter: list_for | list_if |
| 1053 | # list_for: 'for' exprlist 'in' testlist [list_iter] |
| 1054 | # list_if: 'if' test [list_iter] |
Jeremy Hylton | 42a0830 | 2001-04-09 04:27:12 +0000 | [diff] [blame] | 1055 | |
| 1056 | # XXX should raise SyntaxError for assignment |
Tim Peters | e0c446b | 2001-10-18 21:57:37 +0000 | [diff] [blame] | 1057 | |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 1058 | lineno = node[1][2] |
| 1059 | fors = [] |
| 1060 | while node: |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 1061 | t = node[1][1] |
| 1062 | if t == 'for': |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 1063 | assignNode = self.com_assign(node[2], OP_ASSIGN) |
| 1064 | listNode = self.com_node(node[4]) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1065 | newfor = ListCompFor(assignNode, listNode, []) |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 1066 | newfor.lineno = node[1][2] |
| 1067 | fors.append(newfor) |
| 1068 | if len(node) == 5: |
| 1069 | node = None |
| 1070 | else: |
| 1071 | node = self.com_list_iter(node[5]) |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 1072 | elif t == 'if': |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 1073 | test = self.com_node(node[2]) |
Jeremy Hylton | 566d934 | 2004-09-07 15:28:01 +0000 | [diff] [blame] | 1074 | newif = ListCompIf(test, lineno=node[1][2]) |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 1075 | newfor.ifs.append(newif) |
| 1076 | if len(node) == 3: |
| 1077 | node = None |
| 1078 | else: |
| 1079 | node = self.com_list_iter(node[3]) |
| 1080 | else: |
| 1081 | raise SyntaxError, \ |
| 1082 | ("unexpected list comprehension element: %s %d" |
| 1083 | % (node, lineno)) |
Jeremy Hylton | 566d934 | 2004-09-07 15:28:01 +0000 | [diff] [blame] | 1084 | return ListComp(expr, fors, lineno=lineno) |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 1085 | |
| 1086 | def com_list_iter(self, node): |
| 1087 | assert node[0] == symbol.list_iter |
| 1088 | return node[1] |
| 1089 | else: |
| 1090 | def com_list_constructor(self, nodelist): |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1091 | values = [] |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 1092 | for i in range(1, len(nodelist), 2): |
| 1093 | values.append(self.com_node(nodelist[i])) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1094 | return List(values) |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1095 | |
Raymond Hettinger | 354433a | 2004-05-19 08:20:33 +0000 | [diff] [blame] | 1096 | if hasattr(symbol, 'gen_for'): |
| 1097 | def com_generator_expression(self, expr, node): |
| 1098 | # gen_iter: gen_for | gen_if |
| 1099 | # gen_for: 'for' exprlist 'in' test [gen_iter] |
| 1100 | # gen_if: 'if' test [gen_iter] |
| 1101 | |
| 1102 | lineno = node[1][2] |
| 1103 | fors = [] |
| 1104 | while node: |
| 1105 | t = node[1][1] |
| 1106 | if t == 'for': |
| 1107 | assignNode = self.com_assign(node[2], OP_ASSIGN) |
| 1108 | genNode = self.com_node(node[4]) |
Jeremy Hylton | 566d934 | 2004-09-07 15:28:01 +0000 | [diff] [blame] | 1109 | newfor = GenExprFor(assignNode, genNode, [], |
| 1110 | lineno=node[1][2]) |
Raymond Hettinger | 354433a | 2004-05-19 08:20:33 +0000 | [diff] [blame] | 1111 | fors.append(newfor) |
| 1112 | if (len(node)) == 5: |
| 1113 | node = None |
| 1114 | else: |
| 1115 | node = self.com_gen_iter(node[5]) |
| 1116 | elif t == 'if': |
| 1117 | test = self.com_node(node[2]) |
Jeremy Hylton | 566d934 | 2004-09-07 15:28:01 +0000 | [diff] [blame] | 1118 | newif = GenExprIf(test, lineno=node[1][2]) |
Raymond Hettinger | 354433a | 2004-05-19 08:20:33 +0000 | [diff] [blame] | 1119 | newfor.ifs.append(newif) |
| 1120 | if len(node) == 3: |
| 1121 | node = None |
| 1122 | else: |
| 1123 | node = self.com_gen_iter(node[3]) |
| 1124 | else: |
| 1125 | raise SyntaxError, \ |
| 1126 | ("unexpected generator expression element: %s %d" |
| 1127 | % (node, lineno)) |
| 1128 | fors[0].is_outmost = True |
Jeremy Hylton | 566d934 | 2004-09-07 15:28:01 +0000 | [diff] [blame] | 1129 | return GenExpr(GenExprInner(expr, fors), lineno=lineno) |
Raymond Hettinger | 354433a | 2004-05-19 08:20:33 +0000 | [diff] [blame] | 1130 | |
| 1131 | def com_gen_iter(self, node): |
| 1132 | assert node[0] == symbol.gen_iter |
| 1133 | return node[1] |
| 1134 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1135 | def com_dictmaker(self, nodelist): |
| 1136 | # dictmaker: test ':' test (',' test ':' value)* [','] |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1137 | items = [] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1138 | for i in range(1, len(nodelist), 4): |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 1139 | items.append((self.com_node(nodelist[i]), |
| 1140 | self.com_node(nodelist[i+2]))) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1141 | return Dict(items) |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1142 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1143 | def com_apply_trailer(self, primaryNode, nodelist): |
| 1144 | t = nodelist[1][0] |
| 1145 | if t == token.LPAR: |
| 1146 | return self.com_call_function(primaryNode, nodelist[2]) |
| 1147 | if t == token.DOT: |
| 1148 | return self.com_select_member(primaryNode, nodelist[2]) |
| 1149 | if t == token.LSQB: |
| 1150 | return self.com_subscriptlist(primaryNode, nodelist[2], OP_APPLY) |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1151 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1152 | raise SyntaxError, 'unknown node type: %s' % t |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1153 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1154 | def com_select_member(self, primaryNode, nodelist): |
| 1155 | if nodelist[0] != token.NAME: |
| 1156 | raise SyntaxError, "member must be a name" |
Jeremy Hylton | 566d934 | 2004-09-07 15:28:01 +0000 | [diff] [blame] | 1157 | return Getattr(primaryNode, nodelist[1], lineno=nodelist[2]) |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1158 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1159 | def com_call_function(self, primaryNode, nodelist): |
| 1160 | if nodelist[0] == token.RPAR: |
Jeremy Hylton | 566d934 | 2004-09-07 15:28:01 +0000 | [diff] [blame] | 1161 | return CallFunc(primaryNode, [], lineno=extractLineNo(nodelist)) |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1162 | args = [] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1163 | kw = 0 |
| 1164 | len_nodelist = len(nodelist) |
| 1165 | for i in range(1, len_nodelist, 2): |
| 1166 | node = nodelist[i] |
| 1167 | if node[0] == token.STAR or node[0] == token.DOUBLESTAR: |
Tim Peters | e0c446b | 2001-10-18 21:57:37 +0000 | [diff] [blame] | 1168 | break |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1169 | kw, result = self.com_argument(node, kw) |
Michael W. Hudson | c054a8b | 2004-10-11 15:35:53 +0000 | [diff] [blame] | 1170 | |
| 1171 | if len_nodelist != 2 and isinstance(result, GenExpr) \ |
| 1172 | and len(node) == 3 and node[2][0] == symbol.gen_for: |
| 1173 | # allow f(x for x in y), but reject f(x for x in y, 1) |
| 1174 | # should use f((x for x in y), 1) instead of f(x for x in y, 1) |
Raymond Hettinger | 354433a | 2004-05-19 08:20:33 +0000 | [diff] [blame] | 1175 | raise SyntaxError, 'generator expression needs parenthesis' |
Michael W. Hudson | c054a8b | 2004-10-11 15:35:53 +0000 | [diff] [blame] | 1176 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1177 | args.append(result) |
Jeremy Hylton | be317e6 | 2000-05-02 22:32:59 +0000 | [diff] [blame] | 1178 | else: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1179 | # No broken by star arg, so skip the last one we processed. |
| 1180 | i = i + 1 |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1181 | if i < len_nodelist and nodelist[i][0] == token.COMMA: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1182 | # need to accept an application that looks like "f(a, b,)" |
| 1183 | i = i + 1 |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1184 | star_node = dstar_node = None |
| 1185 | while i < len_nodelist: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1186 | tok = nodelist[i] |
| 1187 | ch = nodelist[i+1] |
| 1188 | i = i + 3 |
| 1189 | if tok[0]==token.STAR: |
| 1190 | if star_node is not None: |
| 1191 | raise SyntaxError, 'already have the varargs indentifier' |
| 1192 | star_node = self.com_node(ch) |
| 1193 | elif tok[0]==token.DOUBLESTAR: |
| 1194 | if dstar_node is not None: |
| 1195 | raise SyntaxError, 'already have the kwargs indentifier' |
| 1196 | dstar_node = self.com_node(ch) |
| 1197 | else: |
| 1198 | raise SyntaxError, 'unknown node type: %s' % tok |
Jeremy Hylton | 566d934 | 2004-09-07 15:28:01 +0000 | [diff] [blame] | 1199 | return CallFunc(primaryNode, args, star_node, dstar_node, |
| 1200 | lineno=extractLineNo(nodelist)) |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1201 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1202 | def com_argument(self, nodelist, kw): |
Raymond Hettinger | 354433a | 2004-05-19 08:20:33 +0000 | [diff] [blame] | 1203 | if len(nodelist) == 3 and nodelist[2][0] == symbol.gen_for: |
| 1204 | test = self.com_node(nodelist[1]) |
| 1205 | return 0, self.com_generator_expression(test, nodelist[2]) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1206 | if len(nodelist) == 2: |
| 1207 | if kw: |
| 1208 | raise SyntaxError, "non-keyword arg after keyword arg" |
| 1209 | return 0, self.com_node(nodelist[1]) |
| 1210 | result = self.com_node(nodelist[3]) |
| 1211 | n = nodelist[1] |
| 1212 | while len(n) == 2 and n[0] != token.NAME: |
| 1213 | n = n[1] |
| 1214 | if n[0] != token.NAME: |
| 1215 | raise SyntaxError, "keyword can't be an expression (%s)"%n[0] |
Jeremy Hylton | 566d934 | 2004-09-07 15:28:01 +0000 | [diff] [blame] | 1216 | node = Keyword(n[1], result, lineno=n[2]) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1217 | return 1, node |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1218 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1219 | def com_subscriptlist(self, primary, nodelist, assigning): |
| 1220 | # slicing: simple_slicing | extended_slicing |
| 1221 | # simple_slicing: primary "[" short_slice "]" |
Tim Peters | e0c446b | 2001-10-18 21:57:37 +0000 | [diff] [blame] | 1222 | # extended_slicing: primary "[" slice_list "]" |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1223 | # slice_list: slice_item ("," slice_item)* [","] |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1224 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1225 | # backwards compat slice for '[i:j]' |
| 1226 | if len(nodelist) == 2: |
| 1227 | sub = nodelist[1] |
| 1228 | if (sub[1][0] == token.COLON or \ |
| 1229 | (len(sub) > 2 and sub[2][0] == token.COLON)) and \ |
| 1230 | sub[-1][0] != symbol.sliceop: |
| 1231 | return self.com_slice(primary, sub, assigning) |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1232 | |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1233 | subscripts = [] |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1234 | for i in range(1, len(nodelist), 2): |
| 1235 | subscripts.append(self.com_subscript(nodelist[i])) |
Tim Peters | 0e9980f | 2004-09-12 03:49:31 +0000 | [diff] [blame] | 1236 | return Subscript(primary, assigning, subscripts, |
Jeremy Hylton | 566d934 | 2004-09-07 15:28:01 +0000 | [diff] [blame] | 1237 | lineno=extractLineNo(nodelist)) |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1238 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1239 | def com_subscript(self, node): |
| 1240 | # slice_item: expression | proper_slice | ellipsis |
| 1241 | ch = node[1] |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 1242 | t = ch[0] |
| 1243 | if t == token.DOT and node[2][0] == token.DOT: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1244 | return Ellipsis() |
Jeremy Hylton | 4ebf3be | 2000-11-06 16:03:52 +0000 | [diff] [blame] | 1245 | if t == token.COLON or len(node) > 2: |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1246 | return self.com_sliceobj(node) |
| 1247 | return self.com_node(ch) |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1248 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1249 | def com_sliceobj(self, node): |
| 1250 | # proper_slice: short_slice | long_slice |
| 1251 | # short_slice: [lower_bound] ":" [upper_bound] |
| 1252 | # long_slice: short_slice ":" [stride] |
| 1253 | # lower_bound: expression |
| 1254 | # upper_bound: expression |
| 1255 | # stride: expression |
| 1256 | # |
| 1257 | # Note: a stride may be further slicing... |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1258 | |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1259 | items = [] |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1260 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1261 | if node[1][0] == token.COLON: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1262 | items.append(Const(None)) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1263 | i = 2 |
| 1264 | else: |
| 1265 | items.append(self.com_node(node[1])) |
| 1266 | # i == 2 is a COLON |
| 1267 | i = 3 |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1268 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1269 | if i < len(node) and node[i][0] == symbol.test: |
| 1270 | items.append(self.com_node(node[i])) |
| 1271 | i = i + 1 |
| 1272 | else: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1273 | items.append(Const(None)) |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1274 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1275 | # a short_slice has been built. look for long_slice now by looking |
| 1276 | # for strides... |
| 1277 | for j in range(i, len(node)): |
| 1278 | ch = node[j] |
| 1279 | if len(ch) == 2: |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1280 | items.append(Const(None)) |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1281 | else: |
| 1282 | items.append(self.com_node(ch[2])) |
Jeremy Hylton | 566d934 | 2004-09-07 15:28:01 +0000 | [diff] [blame] | 1283 | return Sliceobj(items, lineno=extractLineNo(node)) |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1284 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1285 | def com_slice(self, primary, node, assigning): |
| 1286 | # short_slice: [lower_bound] ":" [upper_bound] |
| 1287 | lower = upper = None |
| 1288 | if len(node) == 3: |
| 1289 | if node[1][0] == token.COLON: |
| 1290 | upper = self.com_node(node[2]) |
| 1291 | else: |
| 1292 | lower = self.com_node(node[1]) |
| 1293 | elif len(node) == 4: |
| 1294 | lower = self.com_node(node[1]) |
| 1295 | upper = self.com_node(node[3]) |
Jeremy Hylton | 566d934 | 2004-09-07 15:28:01 +0000 | [diff] [blame] | 1296 | return Slice(primary, assigning, lower, upper, |
| 1297 | lineno=extractLineNo(node)) |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1298 | |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1299 | def get_docstring(self, node, n=None): |
| 1300 | if n is None: |
| 1301 | n = node[0] |
| 1302 | node = node[1:] |
| 1303 | if n == symbol.suite: |
| 1304 | if len(node) == 1: |
| 1305 | return self.get_docstring(node[0]) |
| 1306 | for sub in node: |
| 1307 | if sub[0] == symbol.stmt: |
| 1308 | return self.get_docstring(sub) |
| 1309 | return None |
| 1310 | if n == symbol.file_input: |
| 1311 | for sub in node: |
| 1312 | if sub[0] == symbol.stmt: |
| 1313 | return self.get_docstring(sub) |
| 1314 | return None |
| 1315 | if n == symbol.atom: |
| 1316 | if node[0][0] == token.STRING: |
| 1317 | s = '' |
| 1318 | for t in node: |
| 1319 | s = s + eval(t[1]) |
| 1320 | return s |
| 1321 | return None |
Jeremy Hylton | 7cff7fe | 2000-10-25 18:10:32 +0000 | [diff] [blame] | 1322 | if n == symbol.stmt or n == symbol.simple_stmt \ |
| 1323 | or n == symbol.small_stmt: |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1324 | return self.get_docstring(node[0]) |
| 1325 | if n in _doc_nodes and len(node) == 1: |
| 1326 | return self.get_docstring(node[0]) |
| 1327 | return None |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1328 | |
| 1329 | |
| 1330 | _doc_nodes = [ |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1331 | symbol.expr_stmt, |
| 1332 | symbol.testlist, |
Jeremy Hylton | d114261 | 2001-10-17 13:32:52 +0000 | [diff] [blame] | 1333 | symbol.testlist_safe, |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1334 | symbol.test, |
| 1335 | symbol.and_test, |
| 1336 | symbol.not_test, |
| 1337 | symbol.comparison, |
| 1338 | symbol.expr, |
| 1339 | symbol.xor_expr, |
| 1340 | symbol.and_expr, |
| 1341 | symbol.shift_expr, |
| 1342 | symbol.arith_expr, |
| 1343 | symbol.term, |
| 1344 | symbol.factor, |
| 1345 | symbol.power, |
| 1346 | ] |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1347 | |
| 1348 | # comp_op: '<' | '>' | '=' | '>=' | '<=' | '<>' | '!=' | '==' |
| 1349 | # | 'in' | 'not' 'in' | 'is' | 'is' 'not' |
| 1350 | _cmp_types = { |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1351 | token.LESS : '<', |
| 1352 | token.GREATER : '>', |
| 1353 | token.EQEQUAL : '==', |
| 1354 | token.EQUAL : '==', |
| 1355 | token.LESSEQUAL : '<=', |
| 1356 | token.GREATEREQUAL : '>=', |
| 1357 | token.NOTEQUAL : '!=', |
| 1358 | } |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1359 | |
| 1360 | _legal_node_types = [ |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1361 | symbol.funcdef, |
| 1362 | symbol.classdef, |
| 1363 | symbol.stmt, |
| 1364 | symbol.small_stmt, |
| 1365 | symbol.flow_stmt, |
| 1366 | symbol.simple_stmt, |
| 1367 | symbol.compound_stmt, |
| 1368 | symbol.expr_stmt, |
| 1369 | symbol.print_stmt, |
| 1370 | symbol.del_stmt, |
| 1371 | symbol.pass_stmt, |
| 1372 | symbol.break_stmt, |
| 1373 | symbol.continue_stmt, |
| 1374 | symbol.return_stmt, |
| 1375 | symbol.raise_stmt, |
| 1376 | symbol.import_stmt, |
| 1377 | symbol.global_stmt, |
| 1378 | symbol.exec_stmt, |
| 1379 | symbol.assert_stmt, |
| 1380 | symbol.if_stmt, |
| 1381 | symbol.while_stmt, |
| 1382 | symbol.for_stmt, |
| 1383 | symbol.try_stmt, |
| 1384 | symbol.suite, |
| 1385 | symbol.testlist, |
Jeremy Hylton | d114261 | 2001-10-17 13:32:52 +0000 | [diff] [blame] | 1386 | symbol.testlist_safe, |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1387 | symbol.test, |
| 1388 | symbol.and_test, |
| 1389 | symbol.not_test, |
| 1390 | symbol.comparison, |
| 1391 | symbol.exprlist, |
| 1392 | symbol.expr, |
| 1393 | symbol.xor_expr, |
| 1394 | symbol.and_expr, |
| 1395 | symbol.shift_expr, |
| 1396 | symbol.arith_expr, |
| 1397 | symbol.term, |
| 1398 | symbol.factor, |
| 1399 | symbol.power, |
| 1400 | symbol.atom, |
| 1401 | ] |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1402 | |
Jeremy Hylton | 7e30c9b | 2001-08-27 21:02:51 +0000 | [diff] [blame] | 1403 | if hasattr(symbol, 'yield_stmt'): |
| 1404 | _legal_node_types.append(symbol.yield_stmt) |
| 1405 | |
Jeremy Hylton | f968e85 | 2000-02-04 00:25:23 +0000 | [diff] [blame] | 1406 | _assign_types = [ |
Jeremy Hylton | 572bdce | 2000-09-20 02:47:28 +0000 | [diff] [blame] | 1407 | symbol.test, |
| 1408 | symbol.and_test, |
| 1409 | symbol.not_test, |
| 1410 | symbol.comparison, |
| 1411 | symbol.expr, |
| 1412 | symbol.xor_expr, |
| 1413 | symbol.and_expr, |
| 1414 | symbol.shift_expr, |
| 1415 | symbol.arith_expr, |
| 1416 | symbol.term, |
| 1417 | symbol.factor, |
| 1418 | ] |
Jeremy Hylton | 9c048f9 | 2000-10-13 21:58:13 +0000 | [diff] [blame] | 1419 | |
| 1420 | import types |
| 1421 | _names = {} |
| 1422 | for k, v in symbol.sym_name.items(): |
| 1423 | _names[k] = v |
| 1424 | for k, v in token.tok_name.items(): |
| 1425 | _names[k] = v |
| 1426 | |
| 1427 | def debug_tree(tree): |
| 1428 | l = [] |
| 1429 | for elt in tree: |
| 1430 | if type(elt) == types.IntType: |
| 1431 | l.append(_names.get(elt, elt)) |
| 1432 | elif type(elt) == types.StringType: |
| 1433 | l.append(elt) |
| 1434 | else: |
| 1435 | l.append(debug_tree(elt)) |
| 1436 | return l |