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Re: how to enable trace in bison C++ parser

From: Martin Jost
Subject: Re: how to enable trace in bison C++ parser
Date: Thu, 23 Aug 2007 15:50:16 +0200

"Gvnaena Pura" <> schrieb im Newsbeitrag">
> Hi,
> I know for C parsers, one can simply #define YYDEBUG to be 1, and set
> yydebug=1 somewhere, and then the parser will print trace information
> at each step.  But how can I do this for C++ parser?  I
> used ::set_debug_level and ::set_debug_stream, and there is no effect
> at all.  How can I do this?  Thanks in advance.

According to my notes, this should do the trick. But I had my share of 
trouble  here.
Two notes:
- Try option -t to bison
- If you changed the prefix from yy to something else ('%name-prefix="..."' 
or '-p' to bison), you need to change it too on yydebug.



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