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* [Bug c++/114106] New: Wrong result of decltype
@ 2024-02-25 21:59 egor.pugin at gmail dot com
2024-02-25 22:01 ` [Bug c++/114106] " pinskia at gcc dot gnu.org
2024-04-13 8:36 ` pinskia at gcc dot gnu.org
0 siblings, 2 replies; 3+ messages in thread
From: egor.pugin at gmail dot com @ 2024-02-25 21:59 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114106
Bug ID: 114106
Summary: Wrong result of decltype
Product: gcc
Version: 14.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: egor.pugin at gmail dot com
Target Milestone: ---
https://godbolt.org/z/ojbzGYqbW
MSVC works.
template <typename>
struct Type {};
template <typename... Ts>
struct ImplT : Ts...
{ using Ts::operator()...; };
template <typename... Ts>
using ImplA = ImplT<decltype([](Type<Ts>){})...>;
template <typename... Ts>
constexpr bool allUnique{
([]( ImplA<Ts...> x, Type<Ts> t )
{ x.operator()(t); return true;} && ...)}; // <- error is here
//static_assert(allUnique<int>); // also does not work
<source>: In lambda function:
<source>:16:18: error: request for member 'operator()' in 'x', which is of
non-class type 'int'
16 | { x.operator()(t); return true;} && ...)};
| ^
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug c++/114106] Wrong result of decltype
2024-02-25 21:59 [Bug c++/114106] New: Wrong result of decltype egor.pugin at gmail dot com
@ 2024-02-25 22:01 ` pinskia at gcc dot gnu.org
2024-04-13 8:36 ` pinskia at gcc dot gnu.org
1 sibling, 0 replies; 3+ messages in thread
From: pinskia at gcc dot gnu.org @ 2024-02-25 22:01 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114106
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |c++-lambda
Blocks| |107430
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
>decltype([](Type<Ts>){})
Yes lambdas inside a decltype is known to cause issues.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107430
[Bug 107430] [meta-bug] lambda in decltype
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug c++/114106] Wrong result of decltype
2024-02-25 21:59 [Bug c++/114106] New: Wrong result of decltype egor.pugin at gmail dot com
2024-02-25 22:01 ` [Bug c++/114106] " pinskia at gcc dot gnu.org
@ 2024-04-13 8:36 ` pinskia at gcc dot gnu.org
1 sibling, 0 replies; 3+ messages in thread
From: pinskia at gcc dot gnu.org @ 2024-04-13 8:36 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114106
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |14.0
Resolution|--- |FIXED
Status|UNCONFIRMED |RESOLVED
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Fixed on the trunk for GCC 14 by the recent lambda template patches.
^ permalink raw reply [flat|nested] 3+ messages in thread
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2024-02-25 21:59 [Bug c++/114106] New: Wrong result of decltype egor.pugin at gmail dot com
2024-02-25 22:01 ` [Bug c++/114106] " pinskia at gcc dot gnu.org
2024-04-13 8:36 ` pinskia at gcc dot gnu.org
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