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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 |
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| 23 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | 23 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | 24 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | 25 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 26 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | 26 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | 27 |
| 28 import argparse | 28 import argparse |
| 29 from nfa import Nfa | 29 from nfa import Nfa |
| 30 from nfa_builder import NfaBuilder | 30 from nfa_builder import NfaBuilder |
| 31 from dfa import Dfa | 31 from dfa import Dfa |
| 32 from rule_parser import RuleParser, RuleParserState | 32 from rule_parser import RuleParser, RuleParserState |
| 33 from code_generator import CodeGenerator |
| 33 | 34 |
| 34 file_template = ''' | 35 file_template = ''' |
| 35 <html> | 36 <html> |
| 36 <head> | 37 <head> |
| 37 <script src="viz.js"></script> | 38 <script src="viz.js"></script> |
| 38 <script> | 39 <script> |
| 39 function draw(name, id) { | 40 function draw(name, id) { |
| 40 code = document.getElementById(id).innerHTML | 41 code = document.getElementById(id).innerHTML |
| 41 document.body.innerHTML += "<h1>" + name + "</h1>"; | 42 document.body.innerHTML += "<h1>" + name + "</h1>"; |
| 42 try { | 43 try { |
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| 134 self.__automata[rule_name] = (nfa, dfa) | 135 self.__automata[rule_name] = (nfa, dfa) |
| 135 | 136 |
| 136 # Lexes strings with the help of DFAs procuded by the grammar. For sanity | 137 # Lexes strings with the help of DFAs procuded by the grammar. For sanity |
| 137 # checking the automata. | 138 # checking the automata. |
| 138 def lex(self, string): | 139 def lex(self, string): |
| 139 (nfa, dfa) = self.__automata['default'] | 140 (nfa, dfa) = self.__automata['default'] |
| 140 return dfa.lex(string) | 141 return dfa.lex(string) |
| 141 | 142 |
| 142 def generate_code(self): | 143 def generate_code(self): |
| 143 (nfa, dfa) = self.__automata['default'] | 144 (nfa, dfa) = self.__automata['default'] |
| 144 return dfa.to_code() | 145 return CodeGenerator.dfa_to_code(dfa) |
| 145 | 146 |
| 146 if __name__ == '__main__': | 147 if __name__ == '__main__': |
| 147 | 148 |
| 148 parser = argparse.ArgumentParser() | 149 parser = argparse.ArgumentParser() |
| 149 parser.add_argument('--html') | 150 parser.add_argument('--html') |
| 150 parser.add_argument('--re', default='src/lexer/lexer_py.re') | 151 parser.add_argument('--re', default='src/lexer/lexer_py.re') |
| 151 parser.add_argument('--input') | 152 parser.add_argument('--input') |
| 152 parser.add_argument('--code') | 153 parser.add_argument('--code') |
| 153 args = parser.parse_args() | 154 args = parser.parse_args() |
| 154 | 155 |
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| 171 with open(code_file, 'w') as f: | 172 with open(code_file, 'w') as f: |
| 172 f.write(code) | 173 f.write(code) |
| 173 print "wrote code to %s" % code_file | 174 print "wrote code to %s" % code_file |
| 174 | 175 |
| 175 input_file = args.input | 176 input_file = args.input |
| 176 if input_file: | 177 if input_file: |
| 177 with open(input_file, 'r') as f: | 178 with open(input_file, 'r') as f: |
| 178 input_text = f.read() + '\0' | 179 input_text = f.read() + '\0' |
| 179 for t in generator.lex(input_text): | 180 for t in generator.lex(input_text): |
| 180 print t | 181 print t |
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Chromium Code Reviews
Issue 66333008:
Experimental parser: move code gen to own class (Closed)
Base URL: https://v8.googlecode.com/svn/branches/experimental/parser