[Bug c++/37875] New: [c++0x] misinterpreted closing angle bracket in decltype operand

[Bug c++/37875] New: [c++0x] misinterpreted closing angle bracket in decltype operand

[gcc-bugzilla at contacts dot eelis dot net]

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I think g++ incorrectly rejects the following code when compiled with
-std=c++0x:

  template <typename> struct X {};
  X<decltype(1 > 2)> x;
    // t.cpp:2: error: template argument 1 is invalid
    // t.cpp:2: error: invalid type in declaration before ‘;’ token

For comparison, here is very similar code that is accepted:

  template <int> struct Y {};
  Y<sizeof(1 > 2)> y;

Hence, I suspect it is a problem with decltype.


-- 
           Summary: [c++0x] misinterpreted closing angle bracket in decltype
                    operand
           Product: gcc
           Version: 4.4.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: gcc-bugzilla at contacts dot eelis dot net


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37875

[Bug c++/37875] [c++0x] misinterpreted closing angle bracket in decltype operand

[reichelt at gcc dot gnu dot org]

------- Comment #1 from reichelt at gcc dot gnu dot org  2008-12-28 23:08 -------
Confirmed.

Btw, the following is accepted:

  template <typename> struct X {};
  X<decltype((1 > 2))> x;


-- 

reichelt at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |reichelt at gcc dot gnu dot
                   |                            |org
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
           Keywords|                            |monitored, rejects-valid
   Last reconfirmed|0000-00-00 00:00:00         |2008-12-28 23:08:38
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37875

[Bug c++/37875] [c++0x] misinterpreted closing angle bracket in decltype operand

[jason at gcc dot gnu dot org]

-- 

jason at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |jason at gcc dot gnu dot org
                   |dot org                     |
             Status|NEW                         |ASSIGNED
   Last reconfirmed|2008-12-28 23:08:38         |2009-10-12 05:51:46
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37875

[Bug c++/37875] [c++0x] misinterpreted closing angle bracket in decltype operand

[jason at gcc dot gnu dot org]

------- Comment #2 from jason at gcc dot gnu dot org  2009-10-12 21:04 -------
Subject: Bug 37875

Author: jason
Date: Mon Oct 12 21:04:35 2009
New Revision: 152686

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=152686
Log:
        PR c++/37875
        * parser.c (cp_parser_decltype): Set greater_than_is_operator_p.

Added:
    trunk/gcc/testsuite/g++.dg/cpp0x/decltype18.C
Modified:
    trunk/gcc/cp/ChangeLog
    trunk/gcc/cp/parser.c
    trunk/gcc/testsuite/ChangeLog


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37875

[Bug c++/37875] [c++0x] misinterpreted closing angle bracket in decltype operand

[jason at gcc dot gnu dot org]

------- Comment #3 from jason at gcc dot gnu dot org  2009-10-12 21:49 -------
Fixed for 4.5; will backport for 4.4.3 once branch reopens.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37875

[Bug c++/37875] [c++0x] misinterpreted closing angle bracket in decltype operand

[jason at gcc dot gnu dot org]

------- Comment #4 from jason at gcc dot gnu dot org  2009-10-18 05:13 -------
Subject: Bug 37875

Author: jason
Date: Sun Oct 18 05:13:05 2009
New Revision: 152966

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=152966
Log:
        PR c++/38798
        * parser.c (CP_PARSER_FLAGS_NO_TYPE_DEFINITIONS): New.
        (cp_parser_type_specifier): Don't try to parse a class-specifier
        or enum-specifier in that case.
        (cp_parser_trailing_type_id): New.
        (cp_parser_late_return_type_opt): Call it.
        (cp_parser_type_id_1): Add is_trailing_return parm.
        (cp_parser_type_specifier_seq): Likewise.

        PR c++/40092
        * tree.c (cp_tree_equal): Add test for TEMPLATE_PARM_PARAMETER_PACK
        equality.

        PR c++/37875
        * parser.c (cp_parser_decltype): Set greater_than_is_operator_p.

        PR c++/37766
        * pt.c (type_unification_real): Call convert_template_argument
        for function default template arguments.
        (check_default_tmpl_args): Suggest -std=c++0x when function default
        template args seen in C++98 mode.

        PR c++/37204
        * typeck.c (build_reinterpret_cast_1): Handle rvalue refs
        properly.


Added:
    branches/gcc-4_4-branch/gcc/testsuite/g++.dg/cpp0x/decltype18.C
      - copied unchanged from r152686,
trunk/gcc/testsuite/g++.dg/cpp0x/decltype18.C
    branches/gcc-4_4-branch/gcc/testsuite/g++.dg/cpp0x/fntmpdefarg1.C
      - copied unchanged from r152686,
trunk/gcc/testsuite/g++.dg/cpp0x/fntmpdefarg1.C
    branches/gcc-4_4-branch/gcc/testsuite/g++.dg/cpp0x/rv-reinterpret.C
      - copied unchanged from r152661,
trunk/gcc/testsuite/g++.dg/cpp0x/rv-reinterpret.C
    branches/gcc-4_4-branch/gcc/testsuite/g++.dg/cpp0x/trailing1.C
      - copied unchanged from r152924,
trunk/gcc/testsuite/g++.dg/cpp0x/trailing1.C
    branches/gcc-4_4-branch/gcc/testsuite/g++.dg/cpp0x/trailing2.C
      - copied unchanged from r152924,
trunk/gcc/testsuite/g++.dg/cpp0x/trailing2.C
    branches/gcc-4_4-branch/gcc/testsuite/g++.dg/cpp0x/trailing3.C
      - copied unchanged from r152924,
trunk/gcc/testsuite/g++.dg/cpp0x/trailing3.C
    branches/gcc-4_4-branch/gcc/testsuite/g++.dg/cpp0x/trailing4.C
      - copied unchanged from r152924,
trunk/gcc/testsuite/g++.dg/cpp0x/trailing4.C
    branches/gcc-4_4-branch/gcc/testsuite/g++.dg/cpp0x/trailing5.C
      - copied unchanged from r152924,
trunk/gcc/testsuite/g++.dg/cpp0x/trailing5.C
    branches/gcc-4_4-branch/gcc/testsuite/g++.dg/cpp0x/vt-40092.C
      - copied unchanged from r152751,
trunk/gcc/testsuite/g++.dg/cpp0x/vt-40092.C
Removed:
    branches/gcc-4_4-branch/gcc/testsuite/g++.dg/cpp0x/auto12.C
    branches/gcc-4_4-branch/gcc/testsuite/g++.dg/cpp0x/auto13.C
    branches/gcc-4_4-branch/gcc/testsuite/g++.dg/cpp0x/auto6.C
    branches/gcc-4_4-branch/gcc/testsuite/g++.dg/cpp0x/auto8.C
Modified:
    branches/gcc-4_4-branch/gcc/cp/ChangeLog
    branches/gcc-4_4-branch/gcc/cp/parser.c
    branches/gcc-4_4-branch/gcc/cp/pt.c
    branches/gcc-4_4-branch/gcc/cp/tree.c
    branches/gcc-4_4-branch/gcc/cp/typeck.c
    branches/gcc-4_4-branch/gcc/testsuite/ChangeLog


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37875

[Bug c++/37875] [c++0x] misinterpreted closing angle bracket in decltype operand

[jason at gcc dot gnu dot org]

------- Comment #5 from jason at gcc dot gnu dot org  2009-10-18 05:17 -------
Fixed for 4.4.3.


-- 

jason at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |4.4.3


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37875

[Bug c++/37875] [c++0x] misinterpreted closing angle bracket in decltype operand

[jason at gcc dot gnu dot org]

------- Comment #6 from jason at gcc dot gnu dot org  2009-10-18 05:17 -------
.


-- 

jason at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|                            |FIXED


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37875