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Properly test the resolution of LWG-4053 #4748

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Merged
StephanTLavavej merged 1 commit into from
Jul 5, 2024
Merged

Properly test the resolution of LWG-4053 #4748

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15 changes: 5 additions & 10 deletions tests/std/tests/P2474R2_views_repeat/test.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -360,16 +360,6 @@ constexpr bool test() {
test_iterator_arithmetic<wchar_t>();
test_iterator_arithmetic<_Signed128>();

// GH-4507: LWG-4053 Unary call to std::views::repeat does not decay the argument
{
using RPV = ranges::repeat_view<const char*>;

static_assert(same_as<decltype(views::repeat("foo", unreachable_sentinel)), RPV>);
static_assert(same_as<decltype(views::repeat(+"foo", unreachable_sentinel)), RPV>);
static_assert(same_as<decltype(views::repeat("foo")), RPV>);
static_assert(same_as<decltype(views::repeat(+"foo")), RPV>);
}

return true;
}

Expand All @@ -380,6 +370,11 @@ static_assert(CanViewRepeat<string, _Signed128>);
static_assert(
!CanViewRepeat<string, _Unsigned128>); // _Unsigned128 does not satisfy 'integer-like-with-usable-difference-type'

// Check LWG-4053 "Unary call to std::views::repeat does not decay the argument" (affects CTAD only due to LWG-4054)
static_assert(is_same_v<decltype(ranges::repeat_view(ranges::repeat_view(42))), ranges::repeat_view<int>>);
static_assert(is_same_v<decltype(ranges::repeat_view("Hello world!")), ranges::repeat_view<const char*>>);
static_assert(is_same_v<decltype(ranges::repeat_view(test)), ranges::repeat_view<bool (*)()>>);

// Check LWG-4054 "Repeating a repeat_view should repeat the view"
static_assert(is_same_v<decltype(views::repeat(views::repeat(42))), ranges::repeat_view<ranges::repeat_view<int>>>);
static_assert(is_same_v<decltype(views::repeat("Hello world!")), ranges::repeat_view<const char*>>);
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