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* [Bug c++/111277] New: braced-init-list allowed in a template-argument
@ 2023-09-03 17:22 janschultke at googlemail dot com
2023-09-05 14:27 ` [Bug c++/111277] GCC fails to reject braced-init-list " mpolacek at gcc dot gnu.org
0 siblings, 1 reply; 2+ messages in thread
From: janschultke at googlemail dot com @ 2023-09-03 17:22 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111277
Bug ID: 111277
Summary: braced-init-list allowed in a template-argument
Product: gcc
Version: 14.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: janschultke at googlemail dot com
Target Milestone: ---
## Code to reproduce (https://godbolt.org/z/ds7zo5Yeo)
#include <cstddef>
template <typename ValueType, std::size_t Size>
struct ArrayPrimitive
{
constexpr ArrayPrimitive(const ValueType (&array)[Size]) {}
};
template <ArrayPrimitive T>
using ignore = void;
using i = ignore<{{1, 2, 3}}>;
## Explanation
A braced-init-list currently cannot appear in a template-argument.
This is a known defect (https://cplusplus.github.io/CWG/issues/2450.html), but
it is the status quo.
GCC rejects ignore<{1, 2, 3}>, but it does not reject ignore<{{1, 2, 3}}>.
I suspect it fails to recognize the latter as a braced-init-list for whatever
reason.
This bug was discovered here: https://stackoverflow.com/q/77032755/5740428
^ permalink raw reply [flat|nested] 2+ messages in thread
* [Bug c++/111277] GCC fails to reject braced-init-list in a template-argument
2023-09-03 17:22 [Bug c++/111277] New: braced-init-list allowed in a template-argument janschultke at googlemail dot com
@ 2023-09-05 14:27 ` mpolacek at gcc dot gnu.org
0 siblings, 0 replies; 2+ messages in thread
From: mpolacek at gcc dot gnu.org @ 2023-09-05 14:27 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111277
Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |mpolacek at gcc dot gnu.org
--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
We implement CWG 2450.
^ permalink raw reply [flat|nested] 2+ messages in thread
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2023-09-03 17:22 [Bug c++/111277] New: braced-init-list allowed in a template-argument janschultke at googlemail dot com
2023-09-05 14:27 ` [Bug c++/111277] GCC fails to reject braced-init-list " mpolacek at gcc dot gnu.org
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