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* [Bug c++/54323] New: Friend function declaration not correctly identified with CRTP + enable_if
@ 2012-08-19 15:52 vince.rev at gmail dot com
2012-10-04 15:06 ` [Bug c++/54323] " paolo.carlini at oracle dot com
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: vince.rev at gmail dot com @ 2012-08-19 15:52 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54323
Bug #: 54323
Summary: Friend function declaration not correctly identified
with CRTP + enable_if
Classification: Unclassified
Product: gcc
Version: 4.7.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: vince.rev@gmail.com
Created attachment 28051
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=28051
.cpp bug example
The following example involving a friend function in a Curiously Recurring
Template Pattern base class with an enable_if default template argument is not
working :
// --------------------------------------------------------------------
#include <type_traits>
// Base class definition
template<template<typename> class CRTP, typename T> class Base
{
// Friend function declaration
public:
template<template<typename> class CRTP0, typename T0, class>
friend int func(const Base<CRTP0, T0>& rhs);
// Protected test variable
protected:
int n;
};
// Friend function definition
template<template<typename> class CRTP0, typename T0,
class = typename std::enable_if<true>::type>
int func(const Base<CRTP0, T0>& rhs)
{
return rhs.n;
}
// Derived class definition
template<typename T> class Derived : public Base<Derived, T> {};
// Main
int main()
{
Derived<int> x;
func(x);
return 0;
}
// --------------------------------------------------------------------
g++ (tested with 4.6.1, 4.6.2 and 4.7.1) seems not to be able to match the
definition with the declaration of the function and return the following error
:
"int Base<Derived, int>::n' is protected"
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c++/54323] Friend function declaration not correctly identified with CRTP + enable_if
2012-08-19 15:52 [Bug c++/54323] New: Friend function declaration not correctly identified with CRTP + enable_if vince.rev at gmail dot com
@ 2012-10-04 15:06 ` paolo.carlini at oracle dot com
2012-10-04 15:20 ` paolo at gcc dot gnu.org
2012-10-04 15:22 ` paolo.carlini at oracle dot com
2 siblings, 0 replies; 4+ messages in thread
From: paolo.carlini at oracle dot com @ 2012-10-04 15:06 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54323
Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2012-10-04
Target Milestone|--- |4.8.0
Ever Confirmed|0 |1
--- Comment #1 from Paolo Carlini <paolo.carlini at oracle dot com> 2012-10-04 15:06:33 UTC ---
This works in mainline. I'm adding the testcase and closing the PR.
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c++/54323] Friend function declaration not correctly identified with CRTP + enable_if
2012-08-19 15:52 [Bug c++/54323] New: Friend function declaration not correctly identified with CRTP + enable_if vince.rev at gmail dot com
2012-10-04 15:06 ` [Bug c++/54323] " paolo.carlini at oracle dot com
@ 2012-10-04 15:20 ` paolo at gcc dot gnu.org
2012-10-04 15:22 ` paolo.carlini at oracle dot com
2 siblings, 0 replies; 4+ messages in thread
From: paolo at gcc dot gnu.org @ 2012-10-04 15:20 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54323
--- Comment #2 from paolo at gcc dot gnu.org <paolo at gcc dot gnu.org> 2012-10-04 15:19:42 UTC ---
Author: paolo
Date: Thu Oct 4 15:19:34 2012
New Revision: 192083
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=192083
Log:
2012-10-04 Paolo Carlini <paolo.carlini@oracle.com>
PR c++/54323
* g++.dg/cpp0x/pr54323.C: New.
Added:
trunk/gcc/testsuite/g++.dg/cpp0x/pr54323.C
Modified:
trunk/gcc/testsuite/ChangeLog
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c++/54323] Friend function declaration not correctly identified with CRTP + enable_if
2012-08-19 15:52 [Bug c++/54323] New: Friend function declaration not correctly identified with CRTP + enable_if vince.rev at gmail dot com
2012-10-04 15:06 ` [Bug c++/54323] " paolo.carlini at oracle dot com
2012-10-04 15:20 ` paolo at gcc dot gnu.org
@ 2012-10-04 15:22 ` paolo.carlini at oracle dot com
2 siblings, 0 replies; 4+ messages in thread
From: paolo.carlini at oracle dot com @ 2012-10-04 15:22 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54323
Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution| |FIXED
--- Comment #3 from Paolo Carlini <paolo.carlini at oracle dot com> 2012-10-04 15:22:20 UTC ---
Done.
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2012-10-04 15:22 UTC | newest]
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2012-08-19 15:52 [Bug c++/54323] New: Friend function declaration not correctly identified with CRTP + enable_if vince.rev at gmail dot com
2012-10-04 15:06 ` [Bug c++/54323] " paolo.carlini at oracle dot com
2012-10-04 15:20 ` paolo at gcc dot gnu.org
2012-10-04 15:22 ` paolo.carlini at oracle dot com
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