50 lines
1.8 KiB
C++
50 lines
1.8 KiB
C++
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#include <gtest/gtest.h>
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#include <entt/core/type_traits.hpp>
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#include <entt/meta/meta.hpp>
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#include <entt/meta/resolve.hpp>
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#include <entt/meta/template.hpp>
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template<typename>
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struct function_type;
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template<typename Ret, typename... Args>
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struct function_type<Ret(Args...)> {};
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template<typename Ret, typename... Args>
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struct entt::meta_template_traits<function_type<Ret(Args...)>> {
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using class_type = meta_class_template_tag<function_type>;
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using args_type = type_list<Ret, Args...>;
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};
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TEST(MetaTemplate, Invalid) {
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const auto type = entt::resolve<int>();
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ASSERT_FALSE(type.is_template_specialization());
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ASSERT_EQ(type.template_arity(), 0u);
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ASSERT_EQ(type.template_type(), entt::meta_type{});
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ASSERT_EQ(type.template_arg(0u), entt::meta_type{});
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}
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TEST(MetaTemplate, Valid) {
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const auto type = entt::resolve<entt::type_list<int, char>>();
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ASSERT_TRUE(type.is_template_specialization());
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ASSERT_EQ(type.template_arity(), 2u);
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ASSERT_EQ(type.template_type(), entt::resolve<entt::meta_class_template_tag<entt::type_list>>());
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ASSERT_EQ(type.template_arg(0u), entt::resolve<int>());
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ASSERT_EQ(type.template_arg(1u), entt::resolve<char>());
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ASSERT_EQ(type.template_arg(2u), entt::meta_type{});
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}
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TEST(MetaTemplate, CustomTraits) {
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const auto type = entt::resolve<function_type<void(int, const char &)>>();
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ASSERT_TRUE(type.is_template_specialization());
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ASSERT_EQ(type.template_arity(), 3u);
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ASSERT_EQ(type.template_type(), entt::resolve<entt::meta_class_template_tag<function_type>>());
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ASSERT_EQ(type.template_arg(0u), entt::resolve<void>());
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ASSERT_EQ(type.template_arg(1u), entt::resolve<int>());
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ASSERT_EQ(type.template_arg(2u), entt::resolve<char>());
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ASSERT_EQ(type.template_arg(3u), entt::meta_type{});
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}
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