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* [Bug c++/54277] New: Template class member referred to with implicit this inside lambda is incorrectly const-qualified
@ 2012-08-15 22:21 travis at gockelhut dot com
2012-08-16 6:24 ` [Bug c++/54277] " daniel.kruegler at googlemail dot com
` (6 more replies)
0 siblings, 7 replies; 8+ messages in thread
From: travis at gockelhut dot com @ 2012-08-15 22:21 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54277
Bug #: 54277
Summary: Template class member referred to with implicit this
inside lambda is incorrectly const-qualified
Classification: Unclassified
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: travis@gockelhut.com
Created attachment 28025
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=28025
reproduce -- fails in 4.7.0, works in 4.6.3
When a template class attempts to call a member's member function inside of a
lambda function AND the member is referred to through an implicit this, the
member will be erroneously const-qualified.
struct Used
{
void foo() { }
};
template <typename>
struct S
{
Used x;
void bar()
{
auto f = [this] { x.foo(); };
f();
}
};
Yields the following compilation error with g++ 4.7:
capture-this-const.cpp: In lambda function:
capture-this-const.cpp:13:27: error: no matching function for call to
‘Used::foo() const’
capture-this-const.cpp:13:27: note: candidate is:
capture-this-const.cpp:3:7: note: void Used::foo() <near match>
capture-this-const.cpp:3:7: note: no known conversion for implicit ‘this’
parameter from ‘const Used*’ to ‘Used*’
---
This can be compiled properly by explicitly adding this->:
auto f = [this] { this->x.foo(); };
---
$> g++ -v
Using built-in specs.
COLLECT_GCC=g++-4.7
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/4.7/lto-wrapper
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu/Linaro
4.7.0-7ubuntu3' --with-bugurl=file:///usr/share/doc/gcc-4.7/README.Bugs
--enable-languages=c,c++,go,fortran,objc,obj-c++ --prefix=/usr
--program-suffix=-4.7 --enable-shared --enable-linker-build-id
--with-system-zlib --libexecdir=/usr/lib --without-included-gettext
--enable-threads=posix --with-gxx-include-dir=/usr/include/c++/4.7
--libdir=/usr/lib --enable-nls --disable-bootstrap --with-sysroot=/
--enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes
--enable-gnu-unique-object --enable-plugin --enable-objc-gc --disable-werror
--with-arch-32=i686 --with-tune=generic --enable-checking=release
--build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
gcc version 4.7.0 (Ubuntu/Linaro 4.7.0-7ubuntu3)
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug c++/54277] Template class member referred to with implicit this inside lambda is incorrectly const-qualified
2012-08-15 22:21 [Bug c++/54277] New: Template class member referred to with implicit this inside lambda is incorrectly const-qualified travis at gockelhut dot com
@ 2012-08-16 6:24 ` daniel.kruegler at googlemail dot com
2012-08-29 14:54 ` leo at yuriev dot ru
` (5 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: daniel.kruegler at googlemail dot com @ 2012-08-16 6:24 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54277
Daniel Krügler <daniel.kruegler at googlemail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |daniel.kruegler at
| |googlemail dot com
--- Comment #1 from Daniel Krügler <daniel.kruegler at googlemail dot com> 2012-08-16 06:24:26 UTC ---
The problem still exists in gcc 4.8.0 20120729 (experimental)
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug c++/54277] Template class member referred to with implicit this inside lambda is incorrectly const-qualified
2012-08-15 22:21 [Bug c++/54277] New: Template class member referred to with implicit this inside lambda is incorrectly const-qualified travis at gockelhut dot com
2012-08-16 6:24 ` [Bug c++/54277] " daniel.kruegler at googlemail dot com
@ 2012-08-29 14:54 ` leo at yuriev dot ru
2012-10-06 0:08 ` paolo.carlini at oracle dot com
` (4 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: leo at yuriev dot ru @ 2012-08-29 14:54 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54277
Leo Yuriev <leo at yuriev dot ru> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |leo at yuriev dot ru
--- Comment #2 from Leo Yuriev <leo at yuriev dot ru> 2012-08-29 14:54:15 UTC ---
+1, just confirm
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug c++/54277] Template class member referred to with implicit this inside lambda is incorrectly const-qualified
2012-08-15 22:21 [Bug c++/54277] New: Template class member referred to with implicit this inside lambda is incorrectly const-qualified travis at gockelhut dot com
2012-08-16 6:24 ` [Bug c++/54277] " daniel.kruegler at googlemail dot com
2012-08-29 14:54 ` leo at yuriev dot ru
@ 2012-10-06 0:08 ` paolo.carlini at oracle dot com
2013-02-15 19:25 ` jason at gcc dot gnu.org
` (3 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: paolo.carlini at oracle dot com @ 2012-10-06 0:08 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54277
Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2012-10-06
Ever Confirmed|0 |1
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug c++/54277] Template class member referred to with implicit this inside lambda is incorrectly const-qualified
2012-08-15 22:21 [Bug c++/54277] New: Template class member referred to with implicit this inside lambda is incorrectly const-qualified travis at gockelhut dot com
` (2 preceding siblings ...)
2012-10-06 0:08 ` paolo.carlini at oracle dot com
@ 2013-02-15 19:25 ` jason at gcc dot gnu.org
2013-03-05 14:10 ` Martin.vGagern at gmx dot net
` (2 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: jason at gcc dot gnu.org @ 2013-02-15 19:25 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54277
Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
AssignedTo|unassigned at gcc dot |jason at gcc dot gnu.org
|gnu.org |
--- Comment #3 from Jason Merrill <jason at gcc dot gnu.org> 2013-02-15 19:25:31 UTC ---
Created attachment 29472
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=29472
patch
I'll be checking this in after 4.8 branches.
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug c++/54277] Template class member referred to with implicit this inside lambda is incorrectly const-qualified
2012-08-15 22:21 [Bug c++/54277] New: Template class member referred to with implicit this inside lambda is incorrectly const-qualified travis at gockelhut dot com
` (3 preceding siblings ...)
2013-02-15 19:25 ` jason at gcc dot gnu.org
@ 2013-03-05 14:10 ` Martin.vGagern at gmx dot net
2013-03-17 2:42 ` jason at gcc dot gnu.org
2013-03-23 16:57 ` [Bug c++/54277] [4.7/4.8 regression] " jason at gcc dot gnu.org
6 siblings, 0 replies; 8+ messages in thread
From: Martin.vGagern at gmx dot net @ 2013-03-05 14:10 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54277
Martin von Gagern <Martin.vGagern at gmx dot net> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |Martin.vGagern at gmx dot
| |net
--- Comment #4 from Martin von Gagern <Martin.vGagern at gmx dot net> 2013-03-05 14:10:14 UTC ---
*** Bug 56537 has been marked as a duplicate of this bug. ***
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug c++/54277] Template class member referred to with implicit this inside lambda is incorrectly const-qualified
2012-08-15 22:21 [Bug c++/54277] New: Template class member referred to with implicit this inside lambda is incorrectly const-qualified travis at gockelhut dot com
` (4 preceding siblings ...)
2013-03-05 14:10 ` Martin.vGagern at gmx dot net
@ 2013-03-17 2:42 ` jason at gcc dot gnu.org
2013-03-23 16:57 ` [Bug c++/54277] [4.7/4.8 regression] " jason at gcc dot gnu.org
6 siblings, 0 replies; 8+ messages in thread
From: jason at gcc dot gnu.org @ 2013-03-17 2:42 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54277
--- Comment #5 from Jason Merrill <jason at gcc dot gnu.org> 2013-03-17 02:41:35 UTC ---
Author: jason
Date: Sun Mar 17 02:41:22 2013
New Revision: 196747
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=196747
Log:
PR c++/54277
* cp-tree.h (WILDCARD_TYPE_P): Split out from...
(MAYBE_CLASS_TYPE_P): ...here.
* semantics.c (lambda_capture_field_type): Only build a
magic decltype for wildcard types.
(lambda_proxy_type): Likewise.
(finish_non_static_data_member): Get the quals from
the object.
Added:
trunk/gcc/testsuite/g++.dg/cpp0x/lambda/lambda-this9.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/cp-tree.h
trunk/gcc/cp/semantics.c
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug c++/54277] [4.7/4.8 regression] Template class member referred to with implicit this inside lambda is incorrectly const-qualified
2012-08-15 22:21 [Bug c++/54277] New: Template class member referred to with implicit this inside lambda is incorrectly const-qualified travis at gockelhut dot com
` (5 preceding siblings ...)
2013-03-17 2:42 ` jason at gcc dot gnu.org
@ 2013-03-23 16:57 ` jason at gcc dot gnu.org
6 siblings, 0 replies; 8+ messages in thread
From: jason at gcc dot gnu.org @ 2013-03-23 16:57 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54277
Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution| |FIXED
Target Milestone|--- |4.7.3
Summary|Template class member |[4.7/4.8 regression]
|referred to with implicit |Template class member
|this inside lambda is |referred to with implicit
|incorrectly const-qualified |this inside lambda is
| |incorrectly const-qualified
--- Comment #6 from Jason Merrill <jason at gcc dot gnu.org> 2013-03-23 16:57:12 UTC ---
Fixed for 4.7.3.
^ permalink raw reply [flat|nested] 8+ messages in thread
end of thread, other threads:[~2013-03-23 16:57 UTC | newest]
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2012-08-15 22:21 [Bug c++/54277] New: Template class member referred to with implicit this inside lambda is incorrectly const-qualified travis at gockelhut dot com
2012-08-16 6:24 ` [Bug c++/54277] " daniel.kruegler at googlemail dot com
2012-08-29 14:54 ` leo at yuriev dot ru
2012-10-06 0:08 ` paolo.carlini at oracle dot com
2013-02-15 19:25 ` jason at gcc dot gnu.org
2013-03-05 14:10 ` Martin.vGagern at gmx dot net
2013-03-17 2:42 ` jason at gcc dot gnu.org
2013-03-23 16:57 ` [Bug c++/54277] [4.7/4.8 regression] " jason at gcc dot gnu.org
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