test_compile_time_optional.cpp

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#include "gtest/gtest.h"
 
#include "kokkos-execution/impl/compile_time_optional.hpp"

 
namespace Tests::Impl {
 
struct TestType {
    constexpr TestType(int first, int second) noexcept
        : m_c(first + second) {
    }
 
    int m_c;
};
 
using disabled_t = Kokkos::Execution::Impl::CompileTimeOptional<false, TestType>;
using enabled_t = Kokkos::Execution::Impl::CompileTimeOptional<true, TestType>;

consteval bool test_disabled_is_empty_and_trivially_copyable() {
    return std::is_empty_v<disabled_t> && std::is_trivially_copyable_v<disabled_t>;
}
 
static_assert(test_disabled_is_empty_and_trivially_copyable());

consteval bool test_size_of_enabled() {
    return sizeof(enabled_t) == sizeof(typename enabled_t::value_type);
}
 
static_assert(test_size_of_enabled());

consteval bool test_constructible() {
    static_assert(
        std::is_nothrow_constructible_v<enabled_t, int, int> && std::is_nothrow_constructible_v<disabled_t, int, int>);
 
    return enabled_t(42, 666).value.m_c == 708;
}
 
static_assert(test_constructible());

TEST(CompileTimeOptionalTest, value) {
    ASSERT_EQ(enabled_t(42, 666).value.m_c, 708);
}
 
} // namespace Tests::Impl