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* [Bug c++/112448] New: Constraint expression b<x.v> rejected
@ 2023-11-08 20:49 fchelnokov at gmail dot com
2023-11-08 21:48 ` [Bug c++/112448] " pinskia at gcc dot gnu.org
2023-11-08 21:54 ` ppalka at gcc dot gnu.org
0 siblings, 2 replies; 3+ messages in thread
From: fchelnokov at gmail dot com @ 2023-11-08 20:49 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112448
Bug ID: 112448
Summary: Constraint expression b<x.v> rejected
Product: gcc
Version: 13.2.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: fchelnokov at gmail dot com
Target Milestone: ---
This program
struct s { static constexpr bool v = true; };
template<auto> inline constexpr bool b = true;
constexpr bool f(auto x) requires b<x.v> { return true; }
static_assert(f(s{})); // clang ok, gcc nope, msvc ok
is valid per the explanation here https://stackoverflow.com/a/77439003/7325599
but GCC rejects it with the error:
missing template arguments before '<' token
3 | constexpr bool f(auto x) requires b<x.v> { return true; }
| ^
<source>:3:36: error: expected initializer before '<' token
<source>:4:15: error: 'f' was not declared in this scope
4 | static_assert(f(s{}));
Online demo: https://godbolt.org/z/1Gejvr4cn
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug c++/112448] Constraint expression b<x.v> rejected
2023-11-08 20:49 [Bug c++/112448] New: Constraint expression b<x.v> rejected fchelnokov at gmail dot com
@ 2023-11-08 21:48 ` pinskia at gcc dot gnu.org
2023-11-08 21:54 ` ppalka at gcc dot gnu.org
1 sibling, 0 replies; 3+ messages in thread
From: pinskia at gcc dot gnu.org @ 2023-11-08 21:48 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112448
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Note the error message on the trunk changed to:
<source>:4:40: error: template argument 1 is invalid
4 | constexpr bool f(auto x) requires b<x.v> { return true; }
| ^
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug c++/112448] Constraint expression b<x.v> rejected
2023-11-08 20:49 [Bug c++/112448] New: Constraint expression b<x.v> rejected fchelnokov at gmail dot com
2023-11-08 21:48 ` [Bug c++/112448] " pinskia at gcc dot gnu.org
@ 2023-11-08 21:54 ` ppalka at gcc dot gnu.org
1 sibling, 0 replies; 3+ messages in thread
From: ppalka at gcc dot gnu.org @ 2023-11-08 21:54 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112448
Patrick Palka <ppalka at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |ppalka at gcc dot gnu.org
Resolution|--- |DUPLICATE
Status|UNCONFIRMED |RESOLVED
--- Comment #2 from Patrick Palka <ppalka at gcc dot gnu.org> ---
dup
*** This bug has been marked as a duplicate of bug 104255 ***
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2023-11-08 21:54 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
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2023-11-08 20:49 [Bug c++/112448] New: Constraint expression b<x.v> rejected fchelnokov at gmail dot com
2023-11-08 21:48 ` [Bug c++/112448] " pinskia at gcc dot gnu.org
2023-11-08 21:54 ` ppalka at gcc dot gnu.org
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