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* [Bug c++/109387] New: "definition of explicitly-defaulted" error with explicit template instantiation
@ 2023-04-03 8:22 vittorio.romeo at outlook dot com
2023-04-04 0:57 ` [Bug c++/109387] " pinskia at gcc dot gnu.org
0 siblings, 1 reply; 2+ messages in thread
From: vittorio.romeo at outlook dot com @ 2023-04-03 8:22 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109387
Bug ID: 109387
Summary: "definition of explicitly-defaulted" error with
explicit template instantiation
Product: gcc
Version: 12.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: vittorio.romeo at outlook dot com
Target Milestone: ---
Given this code:
template <typename> struct S { S(); };
// extern template struct S<int>;
template <typename T> S<T>::S() = default;
template S<int>::S();
GCC fails to compile with this error:
error: definition of explicitly-defaulted 'S< <template-parameter-1-1>
>::S()
[with <template-parameter-1-1> = int]'
3 | template <typename T> S<T>::S() = default;
| ^~~~
Uncommenting the extern template fixes compilation. Clang compiles the original
code without any issue.
Live example on Compiler Explorer:
- https://gcc.godbolt.org/z/YoPhvKnxa
Related StackOverflow thread:
- https://stackoverflow.com/questions/75913223
^ permalink raw reply [flat|nested] 2+ messages in thread
* [Bug c++/109387] "definition of explicitly-defaulted" error with explicit template instantiation
2023-04-03 8:22 [Bug c++/109387] New: "definition of explicitly-defaulted" error with explicit template instantiation vittorio.romeo at outlook dot com
@ 2023-04-04 0:57 ` pinskia at gcc dot gnu.org
0 siblings, 0 replies; 2+ messages in thread
From: pinskia at gcc dot gnu.org @ 2023-04-04 0:57 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109387
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2023-04-04
Ever confirmed|0 |1
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Confirmed.
^ permalink raw reply [flat|nested] 2+ messages in thread
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2023-04-03 8:22 [Bug c++/109387] New: "definition of explicitly-defaulted" error with explicit template instantiation vittorio.romeo at outlook dot com
2023-04-04 0:57 ` [Bug c++/109387] " pinskia at gcc dot gnu.org
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