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<ranges>: Fix a correctness-damaging typo in ranges::to #4218

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merged 1 commit into from
Nov 29, 2023
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<ranges>: Fix a correctness-damaging typo in ranges::to #4218

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2 changes: 1 addition & 1 deletion stl/inc/ranges
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Original file line number Diff line number Diff line change
Expand Up @@ -10298,7 +10298,7 @@ namespace ranges {
} else if constexpr (_Converts_tag_constructible<_Rng, _Container, _Types...>) {
return _Container(from_range, _STD forward<_Rng>(_Range), _STD forward<_Types>(_Args)...);
} else if constexpr (_Converts_and_common_constructible<_Rng, _Container, _Types...>) {
return _Container(_RANGES begin(_Range), _RANGES end(_Range), _STD forward<_Types...>(_Args)...);
return _Container(_RANGES begin(_Range), _RANGES end(_Range), _STD forward<_Types>(_Args)...);
} else if constexpr (_Converts_constructible_insertable<_Rng, _Container, _Types...>) {
_Container _Cont(_STD forward<_Types>(_Args)...);
if constexpr (_Sized_and_reservable<_Rng, _Container>) {
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22 changes: 21 additions & 1 deletion tests/std/tests/P1206R7_ranges_to_misc/test.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -67,13 +67,17 @@ constexpr bool test_common_constructible() {
using value_type = int;

constexpr common_constructible(const int* const first, const int* const last, secret_key_t)
: first_{first}, last_{last} {}
: first_{first}, last_{last}, args_{3} {}

constexpr common_constructible(const int* const first, const int* const last, secret_key_t, double)
: first_{first}, last_{last}, args_{4} {}

const int* begin() const; // not defined
const int* end() const; // not defined

const int* first_;
const int* last_;
int args_;
};

int some_ints[] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
Expand All @@ -82,11 +86,27 @@ constexpr bool test_common_constructible() {
std::same_as<common_constructible> auto c0 = ranges::to<common_constructible>(some_ints, secret_key);
assert(c0.first_ == ranges::begin(some_ints));
assert(c0.last_ == ranges::end(some_ints));
assert(c0.args_ == 3);
}
{
std::same_as<common_constructible> auto c1 = some_ints | ranges::to<common_constructible>(secret_key);
assert(c1.first_ == ranges::begin(some_ints));
assert(c1.last_ == ranges::end(some_ints));
assert(c1.args_ == 3);
}

// Verify that more than one argument can be passed after the range:
{
std::same_as<common_constructible> auto c2 = ranges::to<common_constructible>(some_ints, secret_key, 3.14);
assert(c2.first_ == ranges::begin(some_ints));
assert(c2.last_ == ranges::end(some_ints));
assert(c2.args_ == 4);
}
{
std::same_as<common_constructible> auto c3 = some_ints | ranges::to<common_constructible>(secret_key, 3.14);
assert(c3.first_ == ranges::begin(some_ints));
assert(c3.last_ == ranges::end(some_ints));
assert(c3.args_ == 4);
}

return true;
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