On 8 Mar 2008, at 17:47, Necrosoft wrote:
I would know the expected token in a parser (GLR also..l) when yyerror
function is invoked. For example:
A = aB | bB
B = b | c
etc....
if the string in input is "ad$", in yyerror I would capture correct
tokens
expected...like b or c.
Ho I can make that?
It prints something like that (or used to), but the LALR(1) that
Bison uses compacts the statements in a way that when an error token
appears in the input, additional reduction can be performed. So to
get a fully correct error handling, including tokens, LR without this
type of compaction, or some search algorithm would be needed.
Hans Aberg
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