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Side by Side Diff: tools/lexer_generator/regex_parser.py

Issue 160443002: Experimental parser: remove match actions (Closed) Base URL: https://v8.googlecode.com/svn/branches/experimental/parser
Patch Set: Created 6 years, 10 months ago
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1 # Copyright 2013 the V8 project authors. All rights reserved. 1 # Copyright 2013 the V8 project authors. All rights reserved.
2 # Redistribution and use in source and binary forms, with or without 2 # Redistribution and use in source and binary forms, with or without
3 # modification, are permitted provided that the following conditions are 3 # modification, are permitted provided that the following conditions are
4 # met: 4 # met:
5 # 5 #
6 # * Redistributions of source code must retain the above copyright 6 # * Redistributions of source code must retain the above copyright
7 # notice, this list of conditions and the following disclaimer. 7 # notice, this list of conditions and the following disclaimer.
8 # * Redistributions in binary form must reproduce the above 8 # * Redistributions in binary form must reproduce the above
9 # copyright notice, this list of conditions and the following 9 # copyright notice, this list of conditions and the following
10 # disclaimer in the documentation and/or other materials provided 10 # disclaimer in the documentation and/or other materials provided
(...skipping 196 matching lines...) Expand 10 before | Expand all | Expand 10 after
207 p[0] = self.__cat(p[1], p[2]) 207 p[0] = self.__cat(p[1], p[2])
208 208
209 def p_fragment(self, p): 209 def p_fragment(self, p):
210 '''fragment : literal maybe_modifier 210 '''fragment : literal maybe_modifier
211 | class maybe_modifier 211 | class maybe_modifier
212 | group maybe_modifier 212 | group maybe_modifier
213 | any maybe_modifier 213 | any maybe_modifier
214 ''' 214 '''
215 if p[2]: 215 if p[2]:
216 if p[2][0] == 'REPEAT': 216 if p[2][0] == 'REPEAT':
217 p[0] = Term(p[2][0], p[2][1], p[2][2], p[1]) 217 p[0] = Term(p[2][0], p[1], p[2][1], p[2][2])
218 else: 218 else:
219 p[0] = Term(p[2][0], p[1]) 219 p[0] = Term(p[2][0], p[1])
220 else: 220 else:
221 p[0] = p[1] 221 p[0] = p[1]
222 222
223 def p_maybe_modifier(self, p): 223 def p_maybe_modifier(self, p):
224 '''maybe_modifier : ONE_OR_MORE 224 '''maybe_modifier : ONE_OR_MORE
225 | ZERO_OR_ONE 225 | ZERO_OR_ONE
226 | ZERO_OR_MORE 226 | ZERO_OR_MORE
227 | REPEAT_BEGIN NUMBER REPEAT_END 227 | REPEAT_BEGIN NUMBER REPEAT_END
(...skipping 56 matching lines...) Expand 10 before | Expand all | Expand 10 after
284 @staticmethod 284 @staticmethod
285 def __cat(left, right): 285 def __cat(left, right):
286 assert left 286 assert left
287 return NfaBuilder.cat_terms([left] if not right else [left, right]) 287 return NfaBuilder.cat_terms([left] if not right else [left, right])
288 288
289 @staticmethod 289 @staticmethod
290 def parse(string): 290 def parse(string):
291 new_lexer = lambda: RegexLexer() 291 new_lexer = lambda: RegexLexer()
292 new_parser = lambda: RegexParser() 292 new_parser = lambda: RegexParser()
293 return ParserBuilder.parse(string, "RegexParser", new_lexer, new_parser) 293 return ParserBuilder.parse(string, "RegexParser", new_lexer, new_parser)
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