44 lines
1.5 KiB
C++
44 lines
1.5 KiB
C++
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#include <iterator>
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#include <type_traits>
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#include <gtest/gtest.h>
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#include <entt/entity/entity.hpp>
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#include <entt/entity/registry.hpp>
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template<typename Type, typename Entity>
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struct entt::storage_type<Type, Entity> {
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// no signal regardless of component type ...
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using type = basic_storage<Type, Entity>;
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};
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template<typename Entity>
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struct entt::storage_type<char, Entity> {
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// ... unless it's char, because yes.
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using type = sigh_storage_mixin<basic_storage<char, Entity>>;
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};
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template<typename, typename, typename = void>
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struct has_on_construct: std::false_type {};
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template<typename Entity, typename Type>
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struct has_on_construct<Entity, Type, std::void_t<decltype(&entt::storage_type_t<Type>::on_construct)>>: std::true_type {};
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template<typename Entity, typename Type>
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inline constexpr auto has_on_construct_v = has_on_construct<Entity, Type>::value;
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TEST(Example, SignalLess) {
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// invoking registry::on_construct<int> is a compile-time error
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static_assert(!has_on_construct_v<entt::entity, int>);
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static_assert(has_on_construct_v<entt::entity, char>);
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entt::registry registry;
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const entt::entity entity[1u]{registry.create()};
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// literally a test for storage_adapter_mixin
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registry.emplace<int>(entity[0], 0);
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registry.erase<int>(entity[0]);
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registry.insert<int>(std::begin(entity), std::end(entity), 3);
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registry.patch<int>(entity[0], [](auto &value) { value = 42; });
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ASSERT_EQ(registry.get<int>(entity[0]), 42);
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}
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