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

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

test/entt/resource/resource.cpp

@@ -0,0 +1,144 @@
+#include <gtest/gtest.h>
+#include <entt/core/type_info.hpp>
+#include <entt/resource/resource.hpp>
+
+struct base {
+    virtual ~base() = default;
+
+    virtual const entt::type_info &type() const noexcept {
+        return entt::type_id<base>();
+    }
+};
+
+struct derived: base {
+    const entt::type_info &type() const noexcept override {
+        return entt::type_id<derived>();
+    }
+};
+
+template<typename Type, typename Other>
+entt::resource<Type> dynamic_resource_cast(const entt::resource<Other> &other) {
+    if(other->type() == entt::type_id<Type>()) {
+        return entt::resource<Type>{other, static_cast<Type &>(*other)};
+    }
+
+    return {};
+}
+
+TEST(Resource, Functionalities) {
+    entt::resource<derived> resource{};
+
+    ASSERT_FALSE(resource);
+    ASSERT_EQ(resource.operator->(), nullptr);
+    ASSERT_EQ(resource.handle().use_count(), 0l);
+
+    const auto value = std::make_shared<derived>();
+    entt::resource<derived> other{value};
+
+    ASSERT_TRUE(other);
+    ASSERT_EQ(other.operator->(), value.get());
+    ASSERT_EQ(&static_cast<derived &>(other), value.get());
+    ASSERT_EQ(&*other, value.get());
+    ASSERT_EQ(other.handle().use_count(), 2l);
+
+    entt::resource<derived> copy{resource};
+    entt::resource<derived> move{std::move(other)};
+
+    ASSERT_FALSE(copy);
+    ASSERT_TRUE(move);
+
+    copy = std::move(move);
+    move = copy;
+
+    ASSERT_TRUE(copy);
+    ASSERT_TRUE(move);
+    ASSERT_EQ(copy, move);
+}
+
+TEST(Resource, DerivedToBase) {
+    entt::resource<derived> resource{std::make_shared<derived>()};
+    entt::resource<base> other{resource};
+    entt::resource<const base> cother{resource};
+
+    ASSERT_TRUE(resource);
+    ASSERT_TRUE(other);
+    ASSERT_TRUE(cother);
+    ASSERT_EQ(resource, other);
+    ASSERT_EQ(other, cother);
+
+    other = resource;
+    cother = resource;
+
+    ASSERT_EQ(resource, other);
+    ASSERT_EQ(other, cother);
+}
+
+TEST(Resource, ConstNonConstAndAllInBetween) {
+    entt::resource<derived> resource{std::make_shared<derived>()};
+    entt::resource<derived> other{resource};
+
+    static_assert(std::is_same_v<decltype(*resource), derived &>);
+    static_assert(std::is_same_v<decltype(*entt::resource<const derived>{other}), const derived &>);
+    static_assert(std::is_same_v<decltype(*std::as_const(resource)), derived &>);
+
+    entt::resource<const derived> copy{resource};
+    entt::resource<const derived> move{std::move(other)};
+
+    ASSERT_TRUE(resource);
+    ASSERT_FALSE(other);
+
+    ASSERT_TRUE(copy);
+    ASSERT_EQ(copy, resource);
+    ASSERT_NE(copy, entt::resource<derived>{});
+    ASSERT_EQ(copy.handle().use_count(), 3u);
+
+    ASSERT_TRUE(move);
+    ASSERT_EQ(move, resource);
+    ASSERT_NE(move, entt::resource<derived>{});
+    ASSERT_EQ(move.handle().use_count(), 3u);
+
+    copy = resource;
+    move = std::move(resource);
+
+    ASSERT_FALSE(resource);
+    ASSERT_FALSE(other);
+
+    ASSERT_TRUE(copy);
+    ASSERT_TRUE(move);
+    ASSERT_EQ(copy.handle().use_count(), 2u);
+}
+
+TEST(Resource, DynamicResourceHandleCast) {
+    entt::resource<derived> resource{std::make_shared<derived>()};
+    entt::resource<const base> other = resource;
+
+    ASSERT_TRUE(other);
+    ASSERT_EQ(resource.handle().use_count(), 2u);
+    ASSERT_EQ(resource, other);
+
+    entt::resource<const derived> cast = dynamic_resource_cast<const derived>(other);
+
+    ASSERT_TRUE(cast);
+    ASSERT_EQ(resource.handle().use_count(), 3u);
+    ASSERT_EQ(resource, cast);
+
+    other = entt::resource<base>{std::make_shared<base>()};
+    cast = dynamic_resource_cast<const derived>(other);
+
+    ASSERT_FALSE(cast);
+    ASSERT_EQ(resource.handle().use_count(), 1u);
+}
+
+TEST(Resource, Comparison) {
+    entt::resource<derived> resource{std::make_shared<derived>()};
+    entt::resource<const base> other = resource;
+
+    ASSERT_TRUE(resource == other);
+    ASSERT_FALSE(resource != other);
+
+    ASSERT_FALSE(resource < other);
+    ASSERT_FALSE(resource > other);
+
+    ASSERT_TRUE(resource <= other);
+    ASSERT_TRUE(resource >= other);
+}

test/entt/resource/resource_cache.cpp

@@ -0,0 +1,428 @@
+#include <cstddef>
+#include <memory>
+#include <tuple>
+#include <utility>
+#include <gtest/gtest.h>
+#include <entt/core/hashed_string.hpp>
+#include <entt/resource/cache.hpp>
+#include <entt/resource/loader.hpp>
+#include "../common/throwing_allocator.hpp"
+
+struct broken_tag {};
+struct with_callback {};
+
+template<typename Type>
+struct loader {
+    using result_type = std::shared_ptr<Type>;
+
+    template<typename... Args>
+    result_type operator()(Args &&...args) const {
+        return std::make_shared<Type>(std::forward<Args>(args)...);
+    }
+
+    template<typename Func>
+    result_type operator()(with_callback, Func &&func) const {
+        return std::forward<Func>(func)();
+    }
+
+    template<typename... Args>
+    result_type operator()(broken_tag, Args &&...) const {
+        return {};
+    }
+};
+
+TEST(ResourceCache, Functionalities) {
+    using namespace entt::literals;
+
+    entt::resource_cache<int> cache;
+
+    ASSERT_NO_FATAL_FAILURE([[maybe_unused]] auto alloc = cache.get_allocator());
+
+    ASSERT_TRUE(cache.empty());
+    ASSERT_EQ(cache.size(), 0u);
+
+    ASSERT_EQ(cache.begin(), cache.end());
+    ASSERT_EQ(std::as_const(cache).begin(), std::as_const(cache).end());
+    ASSERT_EQ(cache.cbegin(), cache.cend());
+
+    ASSERT_FALSE(cache.contains("resource"_hs));
+
+    cache.load("resource"_hs, 42);
+
+    ASSERT_FALSE(cache.empty());
+    ASSERT_EQ(cache.size(), 1u);
+
+    ASSERT_NE(cache.begin(), cache.end());
+    ASSERT_NE(std::as_const(cache).begin(), std::as_const(cache).end());
+    ASSERT_NE(cache.cbegin(), cache.cend());
+
+    ASSERT_TRUE(cache.contains("resource"_hs));
+
+    cache.clear();
+
+    ASSERT_TRUE(cache.empty());
+    ASSERT_EQ(cache.size(), 0u);
+
+    ASSERT_EQ(cache.begin(), cache.end());
+    ASSERT_EQ(std::as_const(cache).begin(), std::as_const(cache).end());
+    ASSERT_EQ(cache.cbegin(), cache.cend());
+
+    ASSERT_FALSE(cache.contains("resource"_hs));
+}
+
+TEST(ResourceCache, Constructors) {
+    using namespace entt::literals;
+
+    entt::resource_cache<int> cache;
+
+    cache = entt::resource_cache<int>{std::allocator<int>{}};
+    cache = entt::resource_cache<int>{entt::resource_loader<int>{}, std::allocator<float>{}};
+
+    cache.load("resource"_hs, 42u);
+
+    entt::resource_cache<int> temp{cache, cache.get_allocator()};
+    entt::resource_cache<int> other{std::move(temp), cache.get_allocator()};
+
+    ASSERT_EQ(cache.size(), 1u);
+    ASSERT_EQ(other.size(), 1u);
+}
+
+TEST(ResourceCache, Copy) {
+    using namespace entt::literals;
+
+    entt::resource_cache<std::size_t> cache;
+    cache.load("resource"_hs, 42u);
+
+    entt::resource_cache<std::size_t> other{cache};
+
+    ASSERT_TRUE(cache.contains("resource"_hs));
+    ASSERT_TRUE(other.contains("resource"_hs));
+
+    cache.load("foo"_hs, 99u);
+    cache.load("bar"_hs, 77u);
+    other.load("quux"_hs, 0u);
+    other = cache;
+
+    ASSERT_TRUE(other.contains("resource"_hs));
+    ASSERT_TRUE(other.contains("foo"_hs));
+    ASSERT_TRUE(other.contains("bar"_hs));
+    ASSERT_FALSE(other.contains("quux"_hs));
+
+    ASSERT_EQ(other["resource"_hs], 42u);
+    ASSERT_EQ(other["foo"_hs], 99u);
+    ASSERT_EQ(other["bar"_hs], 77u);
+}
+
+TEST(ResourceCache, Move) {
+    using namespace entt::literals;
+
+    entt::resource_cache<std::size_t> cache;
+    cache.load("resource"_hs, 42u);
+
+    entt::resource_cache<std::size_t> other{std::move(cache)};
+
+    ASSERT_EQ(cache.size(), 0u);
+    ASSERT_TRUE(other.contains("resource"_hs));
+
+    cache = other;
+    cache.load("foo"_hs, 99u);
+    cache.load("bar"_hs, 77u);
+    other.load("quux"_hs, 0u);
+    other = std::move(cache);
+
+    ASSERT_EQ(cache.size(), 0u);
+    ASSERT_TRUE(other.contains("resource"_hs));
+    ASSERT_TRUE(other.contains("foo"_hs));
+    ASSERT_TRUE(other.contains("bar"_hs));
+    ASSERT_FALSE(other.contains("quux"_hs));
+
+    ASSERT_EQ(other["resource"_hs], 42u);
+    ASSERT_EQ(other["foo"_hs], 99u);
+    ASSERT_EQ(other["bar"_hs], 77u);
+}
+
+TEST(ResourceCache, Iterator) {
+    using namespace entt::literals;
+
+    using iterator = typename entt::resource_cache<int>::iterator;
+
+    static_assert(std::is_same_v<iterator::value_type, std::pair<entt::id_type, entt::resource<int>>>);
+    static_assert(std::is_same_v<iterator::pointer, entt::input_iterator_pointer<std::pair<entt::id_type, entt::resource<int>>>>);
+    static_assert(std::is_same_v<iterator::reference, std::pair<entt::id_type, entt::resource<int>>>);
+
+    entt::resource_cache<int> cache;
+    cache.load("resource"_hs, 42);
+
+    iterator end{cache.begin()};
+    iterator begin{};
+    begin = cache.end();
+    std::swap(begin, end);
+
+    ASSERT_EQ(begin, cache.begin());
+    ASSERT_EQ(end, cache.end());
+    ASSERT_NE(begin, end);
+
+    ASSERT_EQ(begin++, cache.begin());
+    ASSERT_EQ(begin--, cache.end());
+
+    ASSERT_EQ(begin + 1, cache.end());
+    ASSERT_EQ(end - 1, cache.begin());
+
+    ASSERT_EQ(++begin, cache.end());
+    ASSERT_EQ(--begin, cache.begin());
+
+    ASSERT_EQ(begin += 1, cache.end());
+    ASSERT_EQ(begin -= 1, cache.begin());
+
+    ASSERT_EQ(begin + (end - begin), cache.end());
+    ASSERT_EQ(begin - (begin - end), cache.end());
+
+    ASSERT_EQ(end - (end - begin), cache.begin());
+    ASSERT_EQ(end + (begin - end), cache.begin());
+
+    ASSERT_EQ(begin[0u].first, cache.begin()->first);
+    ASSERT_EQ(begin[0u].second, (*cache.begin()).second);
+
+    ASSERT_LT(begin, end);
+    ASSERT_LE(begin, cache.begin());
+
+    ASSERT_GT(end, begin);
+    ASSERT_GE(end, cache.end());
+
+    cache.load("other"_hs, 3);
+    begin = cache.begin();
+
+    ASSERT_EQ(begin[0u].first, "resource"_hs);
+    ASSERT_EQ(begin[1u].second, 3);
+}
+
+TEST(ResourceCache, ConstIterator) {
+    using namespace entt::literals;
+
+    using iterator = typename entt::resource_cache<int>::const_iterator;
+
+    static_assert(std::is_same_v<iterator::value_type, std::pair<entt::id_type, entt::resource<const int>>>);
+    static_assert(std::is_same_v<iterator::pointer, entt::input_iterator_pointer<std::pair<entt::id_type, entt::resource<const int>>>>);
+    static_assert(std::is_same_v<iterator::reference, std::pair<entt::id_type, entt::resource<const int>>>);
+
+    entt::resource_cache<int> cache;
+    cache.load("resource"_hs, 42);
+
+    iterator cend{cache.cbegin()};
+    iterator cbegin{};
+    cbegin = cache.cend();
+    std::swap(cbegin, cend);
+
+    ASSERT_EQ(cbegin, cache.cbegin());
+    ASSERT_EQ(cend, cache.cend());
+    ASSERT_NE(cbegin, cend);
+
+    ASSERT_EQ(cbegin++, cache.cbegin());
+    ASSERT_EQ(cbegin--, cache.cend());
+
+    ASSERT_EQ(cbegin + 1, cache.cend());
+    ASSERT_EQ(cend - 1, cache.cbegin());
+
+    ASSERT_EQ(++cbegin, cache.cend());
+    ASSERT_EQ(--cbegin, cache.cbegin());
+
+    ASSERT_EQ(cbegin += 1, cache.cend());
+    ASSERT_EQ(cbegin -= 1, cache.cbegin());
+
+    ASSERT_EQ(cbegin + (cend - cbegin), cache.cend());
+    ASSERT_EQ(cbegin - (cbegin - cend), cache.cend());
+
+    ASSERT_EQ(cend - (cend - cbegin), cache.cbegin());
+    ASSERT_EQ(cend + (cbegin - cend), cache.cbegin());
+
+    ASSERT_EQ(cbegin[0u].first, cache.cbegin()->first);
+    ASSERT_EQ(cbegin[0u].second, (*cache.cbegin()).second);
+
+    ASSERT_LT(cbegin, cend);
+    ASSERT_LE(cbegin, cache.cbegin());
+
+    ASSERT_GT(cend, cbegin);
+    ASSERT_GE(cend, cache.cend());
+
+    cache.load("other"_hs, 3);
+    cbegin = cache.cbegin();
+
+    ASSERT_EQ(cbegin[0u].first, "resource"_hs);
+    ASSERT_EQ(cbegin[1u].second, 3);
+}
+
+TEST(ResourceCache, IteratorConversion) {
+    using namespace entt::literals;
+
+    entt::resource_cache<int> cache;
+    cache.load("resource"_hs, 42);
+
+    typename entt::resource_cache<int>::iterator it = cache.begin();
+    typename entt::resource_cache<int>::const_iterator cit = it;
+
+    static_assert(std::is_same_v<decltype(*it), std::pair<entt::id_type, entt::resource<int>>>);
+    static_assert(std::is_same_v<decltype(*cit), std::pair<entt::id_type, entt::resource<const int>>>);
+
+    ASSERT_EQ(it->first, "resource"_hs);
+    ASSERT_EQ((*it).second, 42);
+    ASSERT_EQ(it->first, cit->first);
+    ASSERT_EQ((*it).second, (*cit).second);
+
+    ASSERT_EQ(it - cit, 0);
+    ASSERT_EQ(cit - it, 0);
+    ASSERT_LE(it, cit);
+    ASSERT_LE(cit, it);
+    ASSERT_GE(it, cit);
+    ASSERT_GE(cit, it);
+    ASSERT_EQ(it, cit);
+    ASSERT_NE(++cit, it);
+}
+
+TEST(ResourceCache, Load) {
+    using namespace entt::literals;
+
+    entt::resource_cache<int> cache;
+    typename entt::resource_cache<int>::iterator it;
+    bool result;
+
+    ASSERT_TRUE(cache.empty());
+    ASSERT_EQ(cache.size(), 0u);
+    ASSERT_EQ(cache["resource"_hs], entt::resource<int>{});
+    ASSERT_EQ(std::as_const(cache)["resource"_hs], entt::resource<const int>{});
+    ASSERT_FALSE(cache.contains("resource"_hs));
+
+    std::tie(it, result) = cache.load("resource"_hs, 1);
+
+    ASSERT_TRUE(result);
+    ASSERT_EQ(cache.size(), 1u);
+    ASSERT_EQ(it, --cache.end());
+    ASSERT_TRUE(cache.contains("resource"_hs));
+    ASSERT_NE(cache["resource"_hs], entt::resource<int>{});
+    ASSERT_NE(std::as_const(cache)["resource"_hs], entt::resource<const int>{});
+    ASSERT_EQ(it->first, "resource"_hs);
+    ASSERT_EQ(it->second, 1);
+
+    std::tie(it, result) = cache.load("resource"_hs, 2);
+
+    ASSERT_FALSE(result);
+    ASSERT_EQ(cache.size(), 1u);
+    ASSERT_EQ(it, --cache.end());
+    ASSERT_EQ(it->second, 1);
+
+    std::tie(it, result) = cache.force_load("resource"_hs, 3);
+
+    ASSERT_TRUE(result);
+    ASSERT_EQ(cache.size(), 1u);
+    ASSERT_EQ(it, --cache.end());
+    ASSERT_EQ(it->second, 3);
+}
+
+TEST(ResourceCache, Erase) {
+    static constexpr std::size_t resource_count = 8u;
+    entt::resource_cache<std::size_t> cache;
+
+    for(std::size_t next{}, last = resource_count + 1u; next < last; ++next) {
+        cache.load(next, next);
+    }
+
+    ASSERT_EQ(cache.size(), resource_count + 1u);
+
+    for(std::size_t next{}, last = resource_count + 1u; next < last; ++next) {
+        ASSERT_TRUE(cache.contains(next));
+    }
+
+    auto it = cache.erase(++cache.begin());
+    it = cache.erase(it, it + 1);
+
+    ASSERT_EQ((--cache.end())->first, 6u);
+    ASSERT_EQ(cache.erase(6u), 1u);
+    ASSERT_EQ(cache.erase(6u), 0u);
+
+    ASSERT_EQ(cache.size(), resource_count + 1u - 3u);
+
+    ASSERT_EQ(it, ++cache.begin());
+    ASSERT_EQ(it->first, 7u);
+    ASSERT_EQ((--cache.end())->first, 5u);
+
+    for(std::size_t next{}, last = resource_count + 1u; next < last; ++next) {
+        if(next == 1u || next == 8u || next == 6u) {
+            ASSERT_FALSE(cache.contains(next));
+        } else {
+            ASSERT_TRUE(cache.contains(next));
+        }
+    }
+
+    cache.erase(cache.begin(), cache.end());
+
+    for(std::size_t next{}, last = resource_count + 1u; next < last; ++next) {
+        ASSERT_FALSE(cache.contains(next));
+    }
+
+    ASSERT_EQ(cache.size(), 0u);
+}
+
+TEST(ResourceCache, Indexing) {
+    using namespace entt::literals;
+
+    entt::resource_cache<int> cache;
+
+    ASSERT_FALSE(cache.contains("resource"_hs));
+    ASSERT_FALSE(cache["resource"_hs]);
+    ASSERT_FALSE(std::as_const(cache)["resource"_hs]);
+
+    cache.load("resource"_hs, 99);
+
+    ASSERT_TRUE(cache.contains("resource"_hs));
+    ASSERT_EQ(cache[std::move("resource"_hs)], 99);
+    ASSERT_EQ(std::as_const(cache)["resource"_hs], 99);
+}
+
+TEST(ResourceCache, LoaderDispatching) {
+    using namespace entt::literals;
+
+    entt::resource_cache<int, loader<int>> cache;
+    cache.force_load("resource"_hs, 99);
+
+    ASSERT_TRUE(cache.contains("resource"_hs));
+    ASSERT_EQ(cache["resource"_hs], 99);
+
+    cache.force_load("resource"_hs, with_callback{}, []() { return std::make_shared<int>(42); });
+
+    ASSERT_TRUE(cache.contains("resource"_hs));
+    ASSERT_EQ(cache["resource"_hs], 42);
+}
+
+TEST(ResourceCache, BrokenLoader) {
+    using namespace entt::literals;
+
+    entt::resource_cache<int, loader<int>> cache;
+    cache.load("resource"_hs, broken_tag{});
+
+    ASSERT_TRUE(cache.contains("resource"_hs));
+    ASSERT_FALSE(cache["resource"_hs]);
+
+    cache.force_load("resource"_hs, 42);
+
+    ASSERT_TRUE(cache.contains("resource"_hs));
+    ASSERT_TRUE(cache["resource"_hs]);
+}
+
+TEST(ResourceCache, ThrowingAllocator) {
+    using namespace entt::literals;
+
+    using allocator = test::throwing_allocator<std::size_t>;
+    using packed_allocator = test::throwing_allocator<entt::internal::dense_map_node<entt::id_type, std::shared_ptr<std::size_t>>>;
+    using packed_exception = typename packed_allocator::exception_type;
+
+    entt::resource_cache<std::size_t, entt::resource_loader<std::size_t>, allocator> cache{};
+
+    packed_allocator::trigger_on_allocate = true;
+
+    ASSERT_THROW(cache.load("resource"_hs), packed_exception);
+    ASSERT_FALSE(cache.contains("resource"_hs));
+
+    packed_allocator::trigger_on_allocate = true;
+
+    ASSERT_THROW(cache.force_load("resource"_hs), packed_exception);
+    ASSERT_FALSE(cache.contains("resource"_hs));
+}

test/entt/resource/resource_loader.cpp

@@ -0,0 +1,13 @@
+#include <type_traits>
+#include <gtest/gtest.h>
+#include <entt/resource/loader.hpp>
+
+TEST(ResourceLoader, Functionalities) {
+    using loader_type = entt::resource_loader<int>;
+    const auto resource = loader_type{}(42);
+
+    static_assert(std::is_same_v<typename loader_type::result_type, std::shared_ptr<int>>);
+
+    ASSERT_TRUE(resource);
+    ASSERT_EQ(*resource, 42);
+}