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