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* [Bug c++/51143] New: [C++11][DR1159] Alias template allows class definition
@ 2011-11-15 19:35 daniel.kruegler at googlemail dot com
2011-11-15 21:12 ` [Bug c++/51143] " jason at gcc dot gnu.org
` (4 more replies)
0 siblings, 5 replies; 6+ messages in thread
From: daniel.kruegler at googlemail dot com @ 2011-11-15 19:35 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51143
Bug #: 51143
Summary: [C++11][DR1159] Alias template allows class definition
Classification: Unclassified
Product: gcc
Version: 4.7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: daniel.kruegler@googlemail.com
CC: jason@redhat.com
gcc 4.7.0 20111112 (experimental) in C++11 mode accepts the following program
(if variable a2 is commented out):
//---
template<int N>
using A1 = struct B1 { static auto constexpr value = N; };
A1<0> a1;
template<class T>
using A2 = struct B2 { void f(T){} };
A2<bool> a2; // Causes ICE
int main() { } // Line 11
//---
If a2 is commented in (as shown) an ICE is produced:
"main.cpp|11|internal compiler error: in is_base_type, at dwarf2out.c:9643"
According to 7.1.6 [dcl.type] p3 both alias template definitions should be
rejected:
"A type-specifier-seq shall not define a class or enumeration unless it
appears in the type-id of an alias-declaration (7.1.3) that is not the
declaration of a template-declaration."
This sentence was added to honor NB comment US 74 via:
http://www.open-std.org/jtc1/sc22/wg21/docs/cwg_defects.html#1159
The current implementation correctly rejects enumeration definitions and
unnamed class definitions, though.
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug c++/51143] [C++11][DR1159] Alias template allows class definition
2011-11-15 19:35 [Bug c++/51143] New: [C++11][DR1159] Alias template allows class definition daniel.kruegler at googlemail dot com
@ 2011-11-15 21:12 ` jason at gcc dot gnu.org
2011-11-21 15:23 ` [Bug c++/51143] [C++11][DR 1159] " dodji at gcc dot gnu.org
` (3 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: jason at gcc dot gnu.org @ 2011-11-15 21:12 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51143
Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC|jason at redhat dot com |dodji at gcc dot gnu.org,
| |jason at gcc dot gnu.org
--- Comment #1 from Jason Merrill <jason at gcc dot gnu.org> 2011-11-15 20:32:02 UTC ---
Also, please use jason@gcc.gnu.org for me in Bugzilla, thanks.
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug c++/51143] [C++11][DR 1159] Alias template allows class definition
2011-11-15 19:35 [Bug c++/51143] New: [C++11][DR1159] Alias template allows class definition daniel.kruegler at googlemail dot com
2011-11-15 21:12 ` [Bug c++/51143] " jason at gcc dot gnu.org
@ 2011-11-21 15:23 ` dodji at gcc dot gnu.org
2011-11-22 10:57 ` dodji at gcc dot gnu.org
` (2 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: dodji at gcc dot gnu.org @ 2011-11-21 15:23 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51143
Dodji Seketeli <dodji at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2011-11-21
AssignedTo|unassigned at gcc dot |dodji at gcc dot gnu.org
|gnu.org |
Ever Confirmed|0 |1
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug c++/51143] [C++11][DR 1159] Alias template allows class definition
2011-11-15 19:35 [Bug c++/51143] New: [C++11][DR1159] Alias template allows class definition daniel.kruegler at googlemail dot com
2011-11-15 21:12 ` [Bug c++/51143] " jason at gcc dot gnu.org
2011-11-21 15:23 ` [Bug c++/51143] [C++11][DR 1159] " dodji at gcc dot gnu.org
@ 2011-11-22 10:57 ` dodji at gcc dot gnu.org
2011-11-22 16:58 ` dodji at gcc dot gnu.org
2011-11-22 17:13 ` dodji at gcc dot gnu.org
4 siblings, 0 replies; 6+ messages in thread
From: dodji at gcc dot gnu.org @ 2011-11-22 10:57 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51143
--- Comment #2 from Dodji Seketeli <dodji at gcc dot gnu.org> 2011-11-22 09:49:12 UTC ---
A candidate fix has been posted to
http://gcc.gnu.org/ml/gcc-patches/2011-11/msg02194.html.
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug c++/51143] [C++11][DR 1159] Alias template allows class definition
2011-11-15 19:35 [Bug c++/51143] New: [C++11][DR1159] Alias template allows class definition daniel.kruegler at googlemail dot com
` (2 preceding siblings ...)
2011-11-22 10:57 ` dodji at gcc dot gnu.org
@ 2011-11-22 16:58 ` dodji at gcc dot gnu.org
2011-11-22 17:13 ` dodji at gcc dot gnu.org
4 siblings, 0 replies; 6+ messages in thread
From: dodji at gcc dot gnu.org @ 2011-11-22 16:58 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51143
--- Comment #3 from Dodji Seketeli <dodji at gcc dot gnu.org> 2011-11-22 16:41:18 UTC ---
Author: dodji
Date: Tue Nov 22 16:41:10 2011
New Revision: 181626
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=181626
Log:
PR c++/51143 - Alias template allows class definition
gcc/cp
PR c++/51143
* parser.c (cp_parser_alias_declaration): Don't allow type
definition in templates.
gcc/testsuite
PR c++/51143
* g++.dg/cpp0x/alias-decl-16.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/cpp0x/alias-decl-16.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/parser.c
trunk/gcc/testsuite/ChangeLog
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug c++/51143] [C++11][DR 1159] Alias template allows class definition
2011-11-15 19:35 [Bug c++/51143] New: [C++11][DR1159] Alias template allows class definition daniel.kruegler at googlemail dot com
` (3 preceding siblings ...)
2011-11-22 16:58 ` dodji at gcc dot gnu.org
@ 2011-11-22 17:13 ` dodji at gcc dot gnu.org
4 siblings, 0 replies; 6+ messages in thread
From: dodji at gcc dot gnu.org @ 2011-11-22 17:13 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51143
Dodji Seketeli <dodji at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution| |FIXED
--- Comment #4 from Dodji Seketeli <dodji at gcc dot gnu.org> 2011-11-22 16:42:11 UTC ---
This should be fixed in trunk (4.7) now.
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2011-11-22 16:43 UTC | newest]
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2011-11-15 19:35 [Bug c++/51143] New: [C++11][DR1159] Alias template allows class definition daniel.kruegler at googlemail dot com
2011-11-15 21:12 ` [Bug c++/51143] " jason at gcc dot gnu.org
2011-11-21 15:23 ` [Bug c++/51143] [C++11][DR 1159] " dodji at gcc dot gnu.org
2011-11-22 10:57 ` dodji at gcc dot gnu.org
2011-11-22 16:58 ` dodji at gcc dot gnu.org
2011-11-22 17:13 ` dodji at gcc dot gnu.org
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