* C++ grammar issue
@ 2004-04-07 23:19 Yu Yang
2004-04-07 23:22 ` Ian Lance Taylor
0 siblings, 1 reply; 2+ messages in thread
From: Yu Yang @ 2004-04-07 23:19 UTC (permalink / raw)
To: gcc
Hi,
Just now I check C++'s grammar in gcc with bison/yacc.
To my surprise, both tools report that there are 33 shift/reduce
conflicts and 58 reduce/reduce conflicts in the C++ grammar that
gcc support. How does gcc deal with so many conflicts?
Thanks!
Yu
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: C++ grammar issue
2004-04-07 23:19 C++ grammar issue Yu Yang
@ 2004-04-07 23:22 ` Ian Lance Taylor
0 siblings, 0 replies; 2+ messages in thread
From: Ian Lance Taylor @ 2004-04-07 23:22 UTC (permalink / raw)
To: Yu Yang; +Cc: gcc
"Yu Yang" <yuyang@cise.ufl.edu> writes:
> Just now I check C++'s grammar in gcc with bison/yacc.
> To my surprise, both tools report that there are 33 shift/reduce
> conflicts and 58 reduce/reduce conflicts in the C++ grammar that
> gcc support. How does gcc deal with so many conflicts?
gcc dealt with it by cunningly rewriting the parser for the 3.4
release to use recursive descent instead.
But in fact conflicts in the parser are not generally a serious
problem. They require attention, but they don't by themselves
indicate that the parser is broken.
Ian
^ permalink raw reply [flat|nested] 2+ messages in thread
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