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Subject: [Bug c++/54955] alignas example in gcc 4.8 changes.html won't compile
Date: Wed, 31 Oct 2012 08:56:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54955

--- Comment #6 from Dodji Seketeli <dodji at gcc dot gnu.org> 2012-10-31 08:55:51 UTC ---
Author: dodji
Date: Wed Oct 31 08:55:43 2012
New Revision: 193029

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=193029
Log:
PR c++/54955 - Fail to parse alignas expr at the beginning of a declaration

In this PR, g++ embarrassingly fails to parse the simple alignas
expression below:

    alignas(double) int f;

even though the simple-declaration production in Clause 7 suggests
otherwise.

Fixed thus and tested on x86_64-unknown-linux-gnu against trunk.

gcc/cp

    PR c++/54955
    * parser.c (cp_nth_tokens_can_be_std_attribute_p): Recognize the
    'Alignas' keyword as the beginning of a c++11 attribute specifier.
    Update the comment of the function.
    (cp_next_tokens_can_be_gnu_attribute_p): Update the comment of the
    function.

gcc/testsuite/

    PR c++/54955
    * g++.dg/cpp0x/gen-attrs-48-2.C: New test.

Added:
    trunk/gcc/testsuite/g++.dg/cpp0x/gen-attrs-48-2.C
Modified:
    trunk/gcc/cp/ChangeLog
    trunk/gcc/cp/parser.c
    trunk/gcc/testsuite/ChangeLog