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* [Bug c++/112354] New: mismatched types 'B<T>' and 'B<int>&' for generic lambda noexcept-specifier referencing enclosing function parameter
@ 2023-11-02 18:24 ed at catmur dot uk
2023-11-02 18:33 ` [Bug c++/112354] " pinskia at gcc dot gnu.org
0 siblings, 1 reply; 2+ messages in thread
From: ed at catmur dot uk @ 2023-11-02 18:24 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112354
Bug ID: 112354
Summary: mismatched types 'B<T>' and 'B<int>&' for generic
lambda noexcept-specifier referencing enclosing
function parameter
Product: gcc
Version: 14.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: ed at catmur dot uk
Target Milestone: ---
Since 4.9.0,
template<class>
struct B {
B();
B(B const&);
};
template<class T> void g(B<T>, int);
auto f(B<int> x) {
return [](auto y) noexcept(noexcept(g(x, y))) {
return 1;
};
}
int i = f({})(0);
fails with:
<source>: In instantiation of 'f(B<int>)::<lambda(auto:1)> [with auto:1 =
int]':
<source>:12:14: required from here
12 | int i = f({})(0);
| ~~~~~^~~
<source>:8:42: error: no matching function for call to 'g(B<int>&&, int&)'
8 | return [](auto y) noexcept(noexcept(g(x, y))) {
| ~^~~~~~
<source>:6:24: note: candidate: 'template<class T> void g(B<T>, int)'
6 | template<class T> void g(B<T>, int);
| ^
<source>:6:24: note: template argument deduction/substitution failed:
<source>:8:42: note: mismatched types 'B<T>' and 'B<int>&'
8 | return [](auto y) noexcept(noexcept(g(x, y))) {
| ~^~~~~~
^ permalink raw reply [flat|nested] 2+ messages in thread
* [Bug c++/112354] mismatched types 'B<T>' and 'B<int>&' for generic lambda noexcept-specifier referencing enclosing function parameter
2023-11-02 18:24 [Bug c++/112354] New: mismatched types 'B<T>' and 'B<int>&' for generic lambda noexcept-specifier referencing enclosing function parameter ed at catmur dot uk
@ 2023-11-02 18:33 ` pinskia at gcc dot gnu.org
0 siblings, 0 replies; 2+ messages in thread
From: pinskia at gcc dot gnu.org @ 2023-11-02 18:33 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112354
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2023-11-02
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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2023-11-02 18:24 [Bug c++/112354] New: mismatched types 'B<T>' and 'B<int>&' for generic lambda noexcept-specifier referencing enclosing function parameter ed at catmur dot uk
2023-11-02 18:33 ` [Bug c++/112354] " pinskia at gcc dot gnu.org
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