class Racc::Parser Object
do_parse -> ObjectThe 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 yields 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 ) -> StringConvert internal ID of token symbol to the string.
yyerrorEnter error recovering mode. This method does not call #on_error.
yyerrokLeave error recovering mode.
yyacceptExit parser. Return value is Symbol_Value_Stack[0].