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component: yet another piece to fully support non-movable types (see #905)

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This commit is contained in:
Michele Caini
2022-08-02 14:06:35 +02:00
parent e9dbd10db4
commit 879e7d775f
2 changed files with 28 additions and 12 deletions
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4
src/entt/entity/component.hpp
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@@ -14,8 +14,8 @@ namespace entt {
namespace internal {
template<typename, typename = void>
struct in_place_delete: std::false_type {};
template<typename Type, typename = void>
struct in_place_delete: std::bool_constant<!(std::is_move_constructible_v<Type> && std::is_move_assignable_v<Type>)> {};
template<typename Type>
struct in_place_delete<Type, std::enable_if_t<Type::in_place_delete>>

36
test/entt/entity/component.cpp
View File

@@ -1,6 +1,19 @@
#include <gtest/gtest.h>
#include <entt/entity/component.hpp>
struct empty {};
struct non_empty {
int value;
};
struct non_movable {
non_movable() = default;
non_movable(const non_movable &) = delete;
non_movable &operator=(const non_movable &) = delete;
int value;
};
struct self_contained {
static constexpr auto in_place_delete = true;
static constexpr auto page_size = 4u;
@@ -15,36 +28,39 @@ struct entt::component_traits<traits_based> {
static constexpr auto page_size = 8u;
};
struct default_params_empty {};
struct default_params_non_empty {
int value;
};
TEST(Component, VoidType) {
using traits = entt::component_traits<void>;
static_assert(!traits::in_place_delete);
static_assert(traits::in_place_delete);
static_assert(entt::ignore_as_empty_v<typename traits::type>);
// we don't really care about this thanks to ignore_as_empty_v
static_assert(traits::page_size != 0u);
}
TEST(Component, DefaultParamsEmpty) {
using traits = entt::component_traits<default_params_empty>;
TEST(Component, Empty) {
using traits = entt::component_traits<empty>;
static_assert(!traits::in_place_delete);
static_assert(entt::ignore_as_empty_v<typename traits::type>);
static_assert(traits::page_size == 0u);
}
TEST(Component, DefaultParamsNonEmpty) {
using traits = entt::component_traits<default_params_non_empty>;
TEST(Component, NonEmpty) {
using traits = entt::component_traits<non_empty>;
static_assert(!traits::in_place_delete);
static_assert(!entt::ignore_as_empty_v<typename traits::type>);
static_assert(traits::page_size == ENTT_PACKED_PAGE);
}
TEST(Component, NonMovable) {
using traits = entt::component_traits<non_movable>;
static_assert(traits::in_place_delete);
static_assert(!entt::ignore_as_empty_v<typename traits::type>);
static_assert(traits::page_size == ENTT_PACKED_PAGE);
}
TEST(Component, SelfContained) {
using traits = entt::component_traits<self_contained>;