Re: bison/yacc: force look-ahead

saratoga@myremarq.com (China Blue)
18 Aug 1999 11:27:54 -0400

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bison/yacc: force look-ahead hannes_e@my-deja.com (hannes) (1999-08-18)
Re: bison/yacc: force look-ahead saratoga@myremarq.com (1999-08-18)
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From: saratoga@myremarq.com (China Blue)
Newsgroups: comp.compilers,comp.lang.c
Date: 18 Aug 1999 11:27:54 -0400
Organization: Collective Against Consenual Sanity
References: 99-08-074
Keywords: yacc

/ In a bison action I can discover that there is
/ no lookahead token (yychar == YYEMPTY)
/
/ How (if at all) do I force bison to do the lookahead
/ anyway, so I can examine the next symbol in the
/ action?
/
/ /Hannes
/ [The usual advice is "don't do that". I suppose you could call yylex,
/ stick the result in yychar, and hope the bison would do the right
/ thing. -John]


[Or wonder why not defer the action until the next symbol is shifted or
reduced.]

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