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= class Racc::Parser == Super Class Object == Instance Methods : do_parse -> Object The entry point of parser. This method is used with #next_token. If Racc wants to get token (and its value), calls next_token. -- # Example ---- inner def parse @q = [[1,1], [2,2], [3,3], [false, '$']] do_parse end def next_token @q.shift end -- : next_token -> [Symbol, Object] [abstract method] The method to fetch next token. If you use #do_parse method, you must implement #next_token. The format of return value is [TOKEN_SYMBOL, VALUE]. token-symbol is represented by Ruby's symbol by default, e.g. :IDENT for 'IDENT'. ";" (String) for ';'. The final symbol (End of file) must be false. : yyparse( receiver, method_id ) The another entry point of parser. If you use this method, you must implement RECEIVER#METHOD_ID method. RECEIVER#METHOD_ID is a method to get next token. It must 'yield's token, which format is [TOKEN-SYMBOL, VALUE]. : on_error( error_token_id, error_value, value_stack ) This method is called when parse error is found. ERROR_TOKEN_ID is an internal ID of token which caused error. You can get string replesentation of this ID by calling #token_to_str. ERROR_VALUE is a value of error token. value_stack is a stack of symbol values. DO NOT MODIFY this object. This method raises ParseError by default. If this method returns, parsers enter "error recovering mode". : token_to_str( t ) -> String Convert internal ID of token symbol to the string. : yyerror Enter error recovering mode. This method does not call #on_error. : yyerrok Leave error recovering mode. : yyaccept Exit parser. Return value is Symbol_Value_Stack[0].
Version data entries
5 entries across 5 versions & 1 rubygems
Version | Path |
---|---|
racc-1.4.9-java | rdoc/en/parser.en.rdoc |
racc-1.4.9 | rdoc/en/parser.en.rdoc |
racc-1.4.8 | rdoc/en/parser.en.rdoc |
racc-1.4.7 | rdoc/en/parser.en.rdoc |
racc-1.4.6 | doc/en/parser.en.rdoc |