Mark Mitchell
263ee05239
re PR c++/13275 (Implementation of offsetof macro)
PR c++/13275
* c-common.h (enum rid): Add RID_OFFSETOF.
* c-parser.in (rid_to_yy): Ignore RID_OFFSETOF.
* ginclude/stddef.h (offsetof): Reimplement for C++, using
__offsetof__.
* doc/extend.texi: Document __offsetof__.
PR c++/13275
* lex.c (reswords): Add "__offsetof" and "__offsetof__".
* parser.c (cp_parser): Add in_offsetof_p.
(cp_parser_new): Initialize it.
(cp_parser_primary_expression): Handle __offsetof__ (...).
(cp_parser_postfix_expression): Allow casts to pointer type and
uses of "->" in a constant expression if implementing offsetof.
(cp_parser_unary_expression): Allow the use of "&" in a constant
expression if implementing offsetof.
PR c++/13275
* g++.dg/other/offsetof2.C: Remove XFAIL.
* g++.dg/parse/offsetof1.C: New test.
* g++.gd/parse/offsetof2.C: Likewise.
From-SVN: r74702