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* [Bug c++/53721] New: "this" not allowed in trailing return type
@ 2012-06-19 3:45 spe56nw9 at vivid dot ocn.ne.jp
2012-06-20 12:35 ` [Bug c++/53721] " daniel.kruegler at googlemail dot com
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: spe56nw9 at vivid dot ocn.ne.jp @ 2012-06-19 3:45 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53721
Bug #: 53721
Summary: "this" not allowed in trailing return type
Classification: Unclassified
Product: gcc
Version: 4.7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: spe56nw9@vivid.ocn.ne.jp
gcc 4.7.0 outputs following errors when "this" pointer used in trailing return
type:
error: invalid use of incomplete type 'struct A'
error: forward declaration of 'struct A'
error: invalid use of incomplete type 'struct A'
error: forward declaration of 'struct A'
However, according to [expr.prim.general]§5.1.1 clause 3 it should be valid
because it appears after the "cv-qualifier-seq".
Code Example:
struct A
{
void f() {};
auto g() -> decltype(this->f())
{
}
};
Possible duplicate of Bug 52869, however that is about noexcept clauses.
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c++/53721] "this" not allowed in trailing return type
2012-06-19 3:45 [Bug c++/53721] New: "this" not allowed in trailing return type spe56nw9 at vivid dot ocn.ne.jp
@ 2012-06-20 12:35 ` daniel.kruegler at googlemail dot com
2012-06-20 13:42 ` [Bug c++/53721] [C++11] " redi at gcc dot gnu.org
2013-04-24 16:48 ` jason at gcc dot gnu.org
2 siblings, 0 replies; 4+ messages in thread
From: daniel.kruegler at googlemail dot com @ 2012-06-20 12:35 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53721
--- Comment #1 from Daniel Krügler <daniel.kruegler at googlemail dot com> 2012-06-20 12:34:44 UTC ---
I agree that the example should be accepted. I would like to add one further
related example directly from the standard specification. The example from
[expr.prim.general] p3 is also rejected in C++11 mode:
struct A {
char g();
template<class T> auto f(T t) -> decltype(t + g())
{ return t + g(); }
};
template auto A::f(int t) -> decltype(t + g()); // Line 7
reporting on gcc 4.8.0 20120610 (experimental):
"7|error: cannot call member function 'char A::g()' without object"
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c++/53721] [C++11] "this" not allowed in trailing return type
2012-06-19 3:45 [Bug c++/53721] New: "this" not allowed in trailing return type spe56nw9 at vivid dot ocn.ne.jp
2012-06-20 12:35 ` [Bug c++/53721] " daniel.kruegler at googlemail dot com
@ 2012-06-20 13:42 ` redi at gcc dot gnu.org
2013-04-24 16:48 ` jason at gcc dot gnu.org
2 siblings, 0 replies; 4+ messages in thread
From: redi at gcc dot gnu.org @ 2012-06-20 13:42 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53721
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2012-06-20
Summary|"this" not allowed in |[C++11] "this" not allowed
|trailing return type |in trailing return type
Ever Confirmed|0 |1
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c++/53721] [C++11] "this" not allowed in trailing return type
2012-06-19 3:45 [Bug c++/53721] New: "this" not allowed in trailing return type spe56nw9 at vivid dot ocn.ne.jp
2012-06-20 12:35 ` [Bug c++/53721] " daniel.kruegler at googlemail dot com
2012-06-20 13:42 ` [Bug c++/53721] [C++11] " redi at gcc dot gnu.org
@ 2013-04-24 16:48 ` jason at gcc dot gnu.org
2 siblings, 0 replies; 4+ messages in thread
From: jason at gcc dot gnu.org @ 2013-04-24 16:48 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53721
Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
CC| |jason at gcc dot gnu.org
Resolution| |FIXED
AssignedTo|unassigned at gcc dot |jason at gcc dot gnu.org
|gnu.org |
Target Milestone|--- |4.9.0
--- Comment #2 from Jason Merrill <jason at gcc dot gnu.org> 2013-04-24 16:48:00 UTC ---
Fixed for 4.9.
^ permalink raw reply [flat|nested] 4+ messages in thread
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2012-06-19 3:45 [Bug c++/53721] New: "this" not allowed in trailing return type spe56nw9 at vivid dot ocn.ne.jp
2012-06-20 12:35 ` [Bug c++/53721] " daniel.kruegler at googlemail dot com
2012-06-20 13:42 ` [Bug c++/53721] [C++11] " redi at gcc dot gnu.org
2013-04-24 16:48 ` jason at gcc dot gnu.org
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