(bison.info.gz) Token Positions

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(bison.info.gz) Token Values

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 Textual Positions of Tokens
 ---------------------------
 
    If you are using the `@N'-feature ( Tracking Locations
 Locations.) in actions to keep track of the textual locations of tokens
 and groupings, then you must provide this information in `yylex'.  The
 function `yyparse' expects to find the textual location of a token just
 parsed in the global variable `yylloc'.  So `yylex' must store the
 proper data in that variable.
 
    By default, the value of `yylloc' is a structure and you need only
 initialize the members that are going to be used by the actions.  The
 four members are called `first_line', `first_column', `last_line' and
 `last_column'.  Note that the use of this feature makes the parser
 noticeably slower.
 
    The data type of `yylloc' has the name `YYLTYPE'.
 

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(bison.info.gz) Token Values

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(bison.info.gz) Pure Calling