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Re: newbie : modifying C++ grammar
- From: Paolo Bonzini <paolo dot bonzini at lu dot unisi dot ch>
- To: Suresh Shukla <suresh_shukla3 at yahoo dot co dot in>, GCC Development <gcc at gcc dot gnu dot org>
- Date: Fri, 15 Sep 2006 15:17:48 +0200
- Subject: Re: newbie : modifying C++ grammar
- References: <20060915124422.33744.qmail@web7713.mail.in.yahoo.com>
Suresh Shukla wrote:
I have downloaded and built gcc-core and gcc-g++ (both
4.1.1).
I am not able to locate the yacc file for C++.
I want to experiment with some grammar changes.
All parsers in GCC, but the Java parser, are hand written. The C++
parser is in gcc/cp/parser.c and was rewritten for 3.4. It is a
backtracking recursive-descent parser (Fortran is one too; C does not
need backtracking). Though there are examples of C++ grammars written
using Yacc, C++ and Fortran are so complex (and C comes close when you
add OpenMP for example) that using Yacc only adds complexity.
Paolo