Green Sky
5c7231b7a3
git-subtree-dir: external/entt/entt git-subtree-split: fef921132cae7588213d0f9bcd2fb9c8ffd8b7fc
39 lines
1.8 KiB
C++
39 lines
1.8 KiB
C++
#include <tuple>
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#include <gtest/gtest.h>
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#include <entt/core/tuple.hpp>
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TEST(Tuple, IsTuple) {
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static_assert(!entt::is_tuple_v<int>);
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static_assert(entt::is_tuple_v<std::tuple<>>);
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static_assert(entt::is_tuple_v<std::tuple<int>>);
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static_assert(entt::is_tuple_v<std::tuple<int, char>>);
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}
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TEST(Tuple, UnwrapTuple) {
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auto single = std::make_tuple(42);
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auto multi = std::make_tuple(42, 'c');
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auto ref = std::forward_as_tuple(std::get<0>(single));
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ASSERT_TRUE((std::is_same_v<decltype(entt::unwrap_tuple(single)), int &>));
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ASSERT_TRUE((std::is_same_v<decltype(entt::unwrap_tuple(multi)), std::tuple<int, char> &>));
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ASSERT_TRUE((std::is_same_v<decltype(entt::unwrap_tuple(ref)), int &>));
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ASSERT_TRUE((std::is_same_v<decltype(entt::unwrap_tuple(std::move(single))), int &&>));
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ASSERT_TRUE((std::is_same_v<decltype(entt::unwrap_tuple(std::move(multi))), std::tuple<int, char> &&>));
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ASSERT_TRUE((std::is_same_v<decltype(entt::unwrap_tuple(std::move(ref))), int &>));
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ASSERT_TRUE((std::is_same_v<decltype(entt::unwrap_tuple(std::as_const(single))), const int &>));
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ASSERT_TRUE((std::is_same_v<decltype(entt::unwrap_tuple(std::as_const(multi))), const std::tuple<int, char> &>));
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ASSERT_TRUE((std::is_same_v<decltype(entt::unwrap_tuple(std::as_const(ref))), int &>));
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ASSERT_EQ(entt::unwrap_tuple(single), 42);
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ASSERT_EQ(entt::unwrap_tuple(multi), multi);
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ASSERT_EQ(entt::unwrap_tuple(std::move(ref)), 42);
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}
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TEST(Tuple, ForwardApply) {
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ASSERT_EQ(entt::forward_apply{[](auto &&...args) { return sizeof...(args); }}(std::make_tuple()), 0u);
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ASSERT_EQ(entt::forward_apply{[](int i) { return i; }}(std::make_tuple(42)), 42);
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ASSERT_EQ(entt::forward_apply{[](auto... args) { return (args + ...); }}(std::make_tuple('a', 1u)), 'b');
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}
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