ply/ply/yacc.py

34 # This implements an LR parser that is constructed from grammar rules defined
41 # LR parser itself is defined in terms of an object (which allows multiple
72                                # a 'parser.out' file in the current directory
74 debug_file  = 'parser.out'     # Default name of the debugging file
113 # such as the parser.out file.  If a user wants more detailed
142 # Format the result message that the parser produces when running in debug mode.
152 # Format stack entries when the parser is running in debug mode
164 # The following classes are used for the LR parser itself.  These are not
196         self.parser= None
300         # Set up the lexer and parser objects on pslice
302         pslice.parser = self
586             raise RuntimeError("yacc: internal parser error!!!\n")
611         # Set up the lexer and parser objects on pslice
613         pslice.parser = self
859             raise RuntimeError("yacc: internal parser error!!!\n")
883         # Set up the lexer and parser objects on pslice
885         pslice.parser = self
1114             raise RuntimeError("yacc: internal parser error!!!\n")
2381         # Build the parser table, state by state
2758 # This class represents information extracted for building a parser including
2820     # in the parser module file.  Without this function, it is really easy for
2822     # bugger to try and figure out why the resulting parser doesn't work).  Therefore,
3033 # Build a parser
3040     global parse                 # Reference to the parsing method of the last built parser
3050     # Get the module dictionary used for the parser
3057     # Collect parser information from the dictionary
3062         raise YaccError("Unable to build parser")
3077                 parser = LRParser(lr,pinfo.error_func)
3078                 parse = parser.parse
3079                 return parser
3100     # Validate the parser information
3102         raise YaccError("Unable to build parser")
3140         raise YaccError("Unable to build parser")
3214         raise YaccError("Unable to build parser")
3271     # Build the parser
3273     parser = LRParser(lr,pinfo.error_func)
3275     parse = parser.parse
3276     return parser