Squashed 'external/entt/entt/' content from commit fef92113

git-subtree-dir: external/entt/entt
git-subtree-split: fef921132cae7588213d0f9bcd2fb9c8ffd8b7fc

test/entt/meta/meta_dtor.cpp

@@ -0,0 +1,113 @@
+#include <utility>
+#include <gtest/gtest.h>
+#include <entt/core/hashed_string.hpp>
+#include <entt/locator/locator.hpp>
+#include <entt/meta/factory.hpp>
+#include <entt/meta/meta.hpp>
+#include <entt/meta/node.hpp>
+#include <entt/meta/resolve.hpp>
+
+struct clazz_t {
+    clazz_t() {
+        ++counter;
+    }
+
+    static void destroy_decr(clazz_t &) {
+        --counter;
+    }
+
+    void destroy_incr() const {
+        ++counter;
+    }
+
+    inline static int counter = 0;
+};
+
+struct MetaDtor: ::testing::Test {
+    void SetUp() override {
+        using namespace entt::literals;
+
+        entt::meta<clazz_t>()
+            .type("clazz"_hs)
+            .dtor<clazz_t::destroy_decr>();
+
+        clazz_t::counter = 0;
+    }
+
+    void TearDown() override {
+        entt::meta_reset();
+    }
+};
+
+TEST_F(MetaDtor, Functionalities) {
+    ASSERT_EQ(clazz_t::counter, 0);
+
+    auto any = entt::resolve<clazz_t>().construct();
+    auto cref = std::as_const(any).as_ref();
+    auto ref = any.as_ref();
+
+    ASSERT_TRUE(any);
+    ASSERT_TRUE(cref);
+    ASSERT_TRUE(ref);
+
+    ASSERT_EQ(clazz_t::counter, 1);
+
+    cref.reset();
+    ref.reset();
+
+    ASSERT_TRUE(any);
+    ASSERT_FALSE(cref);
+    ASSERT_FALSE(ref);
+
+    ASSERT_EQ(clazz_t::counter, 1);
+
+    any.reset();
+
+    ASSERT_FALSE(any);
+    ASSERT_FALSE(cref);
+    ASSERT_FALSE(ref);
+
+    ASSERT_EQ(clazz_t::counter, 0);
+}
+
+TEST_F(MetaDtor, AsRefConstruction) {
+    ASSERT_EQ(clazz_t::counter, 0);
+
+    clazz_t instance{};
+    auto any = entt::forward_as_meta(instance);
+    auto cany = entt::forward_as_meta(std::as_const(instance));
+    auto cref = cany.as_ref();
+    auto ref = any.as_ref();
+
+    ASSERT_TRUE(any);
+    ASSERT_TRUE(cany);
+    ASSERT_TRUE(cref);
+    ASSERT_TRUE(ref);
+
+    ASSERT_EQ(clazz_t::counter, 1);
+
+    any.reset();
+    cany.reset();
+    cref.reset();
+    ref.reset();
+
+    ASSERT_FALSE(any);
+    ASSERT_FALSE(cany);
+    ASSERT_FALSE(cref);
+    ASSERT_FALSE(ref);
+
+    ASSERT_EQ(clazz_t::counter, 1);
+}
+
+TEST_F(MetaDtor, ReRegistration) {
+    SetUp();
+
+    auto &&node = entt::internal::resolve<clazz_t>(entt::internal::meta_context::from(entt::locator<entt::meta_ctx>::value_or()));
+
+    ASSERT_NE(node.dtor.dtor, nullptr);
+
+    entt::meta<clazz_t>().dtor<&clazz_t::destroy_incr>();
+    entt::resolve<clazz_t>().construct().reset();
+
+    ASSERT_EQ(clazz_t::counter, 2);
+}