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set flex start conditions from bison?
From: |
Rui Maciel |
Subject: |
set flex start conditions from bison? |
Date: |
Mon, 24 Aug 2009 13:32:42 +0100 |
User-agent: |
KNode/4.3.0 |
Is it possible to set the flex start conditions from within bison? I've set a
couple of lexer start
conditions in the flex file and added yy_push_state() to the bison file, which
already includes a flex-
generated header. Nonetheless, the compiler still complains that the start
condition symbol (named s_element)
is undeclared. As the start condition symbol is described in the flex file as:
#ifdef YY_HEADER_EXPORT_START_CONDITIONS
#define INITIAL 0
#define s_element 1
#endif
That leads me to believe that some other tweaking is needed to at least define
YY_HEADER_EXPORT_START_CONDITIONS and therefore declare the start condition
symbol.
So, how do we set flex start conditions from within a bison file?
Thanks in advance,
Rui Maciel
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