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* [Bug c++/54903] New: Auto + static in-class constant initalization not working
@ 2012-10-11 18:54 rhalbersma at gmail dot com
2012-10-11 22:53 ` [Bug c++/54903] [4.8 Regression] " paolo.carlini at oracle dot com
` (3 more replies)
0 siblings, 4 replies; 5+ messages in thread
From: rhalbersma at gmail dot com @ 2012-10-11 18:54 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54903
Bug #: 54903
Summary: Auto + static in-class constant initalization not
working
Classification: Unclassified
Product: gcc
Version: 4.7.2
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: rhalbersma@gmail.com
template<int N, int D>
struct Modulus
{
static auto const value = N % D;
};
template<int N>
struct Angle
{
static auto const value = Modulus<N, 360>::value; // ERROR
//static int const value = Modulus<N, 360>::value; // OK
//static auto const value = N % 360; // OK
typedef Angle<value> type;
};
I cannot do static auto const = Modulus<N, 360>::value, with either MinGW gcc
4.7.2 (Nuwen distro) or Ideone (gcc 4.5.1). Instead, I have to either
explicitly denote the type as static int const value = Modulus<N, 360>::value
or I have to use auto with the full modular expression as static auto const
value = N % 360;.
The code appears to be Standard compliant and works on both Visual C++ 2010
Express and Clang 3.1
Link to Stackoverflow: http://stackoverflow.com/q/12834874/819272
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug c++/54903] [4.8 Regression] Auto + static in-class constant initalization not working
2012-10-11 18:54 [Bug c++/54903] New: Auto + static in-class constant initalization not working rhalbersma at gmail dot com
@ 2012-10-11 22:53 ` paolo.carlini at oracle dot com
2012-10-12 8:12 ` mpolacek at gcc dot gnu.org
` (2 subsequent siblings)
3 siblings, 0 replies; 5+ messages in thread
From: paolo.carlini at oracle dot com @ 2012-10-11 22:53 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54903
Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2012-10-11
CC| |jason at gcc dot gnu.org
Target Milestone|--- |4.8.0
Summary|Auto + static in-class |[4.8 Regression] Auto +
|constant initalization not |static in-class constant
|working |initalization not working
Ever Confirmed|0 |1
--- Comment #1 from Paolo Carlini <paolo.carlini at oracle dot com> 2012-10-11 22:53:25 UTC ---
In terms of FSF releases, this is accepted by all the 4.7.x releases up to
current 4_7-branch. It's not accepted by current mainline with:
54903.C:14:23: error: use of ‘Angle<N>::value’ before deduction of ‘auto’
typedef Angle<value> type;
^
54903.C:14:23: error: use of ‘Angle<N>::value’ before deduction of ‘auto’
Thus it seems a Regression (if anything ;)
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug c++/54903] [4.8 Regression] Auto + static in-class constant initalization not working
2012-10-11 18:54 [Bug c++/54903] New: Auto + static in-class constant initalization not working rhalbersma at gmail dot com
2012-10-11 22:53 ` [Bug c++/54903] [4.8 Regression] " paolo.carlini at oracle dot com
@ 2012-10-12 8:12 ` mpolacek at gcc dot gnu.org
2012-11-15 16:12 ` [Bug c++/54903] [4.8 Regression] Auto + static in-class constant initialization " jason at gcc dot gnu.org
2012-11-15 16:48 ` jason at gcc dot gnu.org
3 siblings, 0 replies; 5+ messages in thread
From: mpolacek at gcc dot gnu.org @ 2012-10-12 8:12 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54903
Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |mpolacek at gcc dot gnu.org
--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> 2012-10-12 08:12:23 UTC ---
Started with http://gcc.gnu.org/viewcvs?view=revision&revision=185768
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug c++/54903] [4.8 Regression] Auto + static in-class constant initialization not working
2012-10-11 18:54 [Bug c++/54903] New: Auto + static in-class constant initalization not working rhalbersma at gmail dot com
2012-10-11 22:53 ` [Bug c++/54903] [4.8 Regression] " paolo.carlini at oracle dot com
2012-10-12 8:12 ` mpolacek at gcc dot gnu.org
@ 2012-11-15 16:12 ` jason at gcc dot gnu.org
2012-11-15 16:48 ` jason at gcc dot gnu.org
3 siblings, 0 replies; 5+ messages in thread
From: jason at gcc dot gnu.org @ 2012-11-15 16:12 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54903
--- Comment #3 from Jason Merrill <jason at gcc dot gnu.org> 2012-11-15 16:12:03 UTC ---
Author: jason
Date: Thu Nov 15 16:11:56 2012
New Revision: 193535
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=193535
Log:
PR c++/54903
* decl2.c (mark_used): Don't complain about auto in templates.
Added:
trunk/gcc/testsuite/g++.dg/cpp0x/auto36.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/decl2.c
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug c++/54903] [4.8 Regression] Auto + static in-class constant initialization not working
2012-10-11 18:54 [Bug c++/54903] New: Auto + static in-class constant initalization not working rhalbersma at gmail dot com
` (2 preceding siblings ...)
2012-11-15 16:12 ` [Bug c++/54903] [4.8 Regression] Auto + static in-class constant initialization " jason at gcc dot gnu.org
@ 2012-11-15 16:48 ` jason at gcc dot gnu.org
3 siblings, 0 replies; 5+ messages in thread
From: jason at gcc dot gnu.org @ 2012-11-15 16:48 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54903
Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution| |FIXED
--- Comment #4 from Jason Merrill <jason at gcc dot gnu.org> 2012-11-15 16:47:45 UTC ---
Fixed.
^ permalink raw reply [flat|nested] 5+ messages in thread
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2012-10-11 18:54 [Bug c++/54903] New: Auto + static in-class constant initalization not working rhalbersma at gmail dot com
2012-10-11 22:53 ` [Bug c++/54903] [4.8 Regression] " paolo.carlini at oracle dot com
2012-10-12 8:12 ` mpolacek at gcc dot gnu.org
2012-11-15 16:12 ` [Bug c++/54903] [4.8 Regression] Auto + static in-class constant initialization " jason at gcc dot gnu.org
2012-11-15 16:48 ` jason at gcc dot gnu.org
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