http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56815
--- Comment #6 from Chung-Ju Wu <jasonwucj at gmail dot com> 2013-04-03 07:33:03 UTC --- (In reply to comment #5) > (In reply to comment #4) > > From gcc manpage, the option '-std=' specifies base standard and > > accept some GNU extensions that do not contradict it. > > > > If you would like to issue warnings/errors demanded by strict > > ISO C and ISO C++, the -pedantic/-pedantic-errors are required. > > Ok, thanks. It works. > But still. What is the difference between +=1 and ++ ? It's the same > operation. The operation result may be the same. But the grammar parsing is different. Refer to ISO/IEC 14882:1998 C++ standard, Annex A, Grammar summary. '+=' is parsed via assignment-expression '++' is parsed via postfix-expression I have no idea whether the same checking strategy should be applied for these two operations. But at least, I guess they are indeed treated in different way in the parser~ :p
