Thanks to visit codestin.com
Credit goes to github.com

Skip to content

Make to_array ADL-proof #4042

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
StephanTLavavej merged 4 commits into from
Sep 22, 2023
Merged

Make to_array ADL-proof #4042

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
4 commits
Select commit Hold shift + click to select a range
d782e77
Make `to_array` ADL-proof
frederick-vs-ja Sep 21, 2023
e5c04fe
Qualify `_Swap_ranges_unchecked`
frederick-vs-ja Sep 21, 2023
13cecd3
Merge branch 'main' into adl-proof-to_array
StephanTLavavej Sep 22, 2023
80ddd84
Work around the `/clr` bug with incomplete types.
StephanTLavavej Sep 22, 2023
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
6 changes: 3 additions & 3 deletions stl/inc/array
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -433,7 +433,7 @@ public:
}

_CONSTEXPR20 void swap(array& _Other) noexcept(_Is_nothrow_swappable<_Ty>::value) {
_Swap_ranges_unchecked(_Elems, _Elems + _Size, _Other._Elems);
_STD _Swap_ranges_unchecked(_Elems, _Elems + _Size, _Other._Elems);
}

_NODISCARD _CONSTEXPR17 iterator begin() noexcept {
Expand Down Expand Up @@ -834,7 +834,7 @@ _NODISCARD constexpr array<remove_cv_t<_Ty>, _Size> to_array(_Ty (&_Array)[_Size
"to_array does not accept multidimensional arrays.");
static_assert(is_constructible_v<_Ty, _Ty&>, "N4950 [array.creation]/1: "
"to_array requires copy constructible elements.");
return _To_array_lvalue_impl(_Array, make_index_sequence<_Size>{});
return _STD _To_array_lvalue_impl(_Array, make_index_sequence<_Size>{});
}

_EXPORT_STD template <class _Ty, size_t _Size>
Expand All @@ -843,7 +843,7 @@ _NODISCARD constexpr array<remove_cv_t<_Ty>, _Size> to_array(_Ty (&&_Array)[_Siz
"to_array does not accept multidimensional arrays.");
static_assert(is_move_constructible_v<_Ty>, "N4950 [array.creation]/4: "
"to_array requires move constructible elements.");
return _To_array_rvalue_impl(_STD move(_Array), make_index_sequence<_Size>{});
return _STD _To_array_rvalue_impl(_STD move(_Array), make_index_sequence<_Size>{});
}
#endif // _HAS_CXX20

Expand Down
15 changes: 15 additions & 0 deletions tests/std/tests/P0325R4_to_array/test.cpp
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -53,6 +53,21 @@ void assert_not_constexpr() {
assert_equal(to_array({"cats"s, "go"s, "meow"s}), array<string, 3>{"cats", "go", "meow"});
}

#ifndef _M_CEE // TRANSITION, VSO-1659496
struct incomplete;

template <class T>
struct holder {
T t;
};

void test_adl_proof() { // COMPILE-ONLY
holder<incomplete>* a[1]{};
(void) std::to_array(a); // intentionally qualified to avoid ADL
(void) std::to_array(std::move(a)); // intentionally qualified to avoid ADL
}
#endif // _M_CEE

int main() {
assert(assert_constexpr());
static_assert(assert_constexpr());
Expand Down