meta: small review
This commit is contained in:
Michele Caini
@@ -20,7 +20,9 @@
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#include "entity/utility.hpp"
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#include "entity/view.hpp"
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#include "locator/locator.hpp"
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#include "meta/ctx.hpp"
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#include "meta/factory.hpp"
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#include "meta/internal.hpp"
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#include "meta/meta.hpp"
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#include "meta/resolve.hpp"
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#include "meta/policy.hpp"
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78
src/entt/meta/ctx.hpp
Normal file
78
src/entt/meta/ctx.hpp
Normal file
@@ -0,0 +1,78 @@
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#ifndef ENTT_META_CTX_HPP
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#define ENTT_META_CTX_HPP
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#include "../core/attribute.h"
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#include "../config/config.h"
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#include "internal.hpp"
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namespace entt {
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/**
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* @cond TURN_OFF_DOXYGEN
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* Internal details not to be documented.
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*/
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namespace internal {
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struct ENTT_API meta_context {
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// we could use the lines below but VS2017 returns with an ICE if combined with ENTT_API despite the code being valid C++
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// inline static meta_type_node *local = nullptr;
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// inline static meta_type_node **global = &local;
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[[nodiscard]] static meta_type_node * & local() ENTT_NOEXCEPT {
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static meta_type_node *chain = nullptr;
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return chain;
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}
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[[nodiscard]] static meta_type_node ** & global() ENTT_NOEXCEPT {
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static meta_type_node **chain = &local();
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return chain;
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}
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static void detach(const meta_type_node *node) ENTT_NOEXCEPT {
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auto **it = global();
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while(*it && *it != node) {
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it = &(*it)->next;
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}
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if(*it) {
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*it = (*it)->next;
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}
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}
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};
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}
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/**
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* Internal details not to be documented.
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* @endcond TURN_OFF_DOXYGEN
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*/
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/*! @brief Opaque container for a meta context. */
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struct meta_ctx {
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/**
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* @brief Binds the meta system to a given context.
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* @param other A valid context to which to bind.
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*/
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static void bind(meta_ctx other) ENTT_NOEXCEPT {
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internal::meta_context::global() = other.ctx;
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}
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private:
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internal::meta_type_node **ctx{&internal::meta_context::local()};
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};
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}
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#endif
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@@ -13,6 +13,7 @@
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#include "../core/type_info.hpp"
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#include "../core/type_traits.hpp"
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#include "../core/utility.hpp"
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#include "internal.hpp"
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#include "meta.hpp"
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#include "policy.hpp"
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237
src/entt/meta/internal.hpp
Normal file
237
src/entt/meta/internal.hpp
Normal file
@@ -0,0 +1,237 @@
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#ifndef ENTT_META_INTERNAL_HPP
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#define ENTT_META_INTERNAL_HPP
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#include <cstddef>
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#include <type_traits>
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#include "../core/attribute.h"
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#include "../config/config.h"
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#include "../core/fwd.hpp"
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#include "../core/type_info.hpp"
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#include "../core/type_traits.hpp"
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namespace entt {
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class meta_any;
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/**
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* @cond TURN_OFF_DOXYGEN
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* Internal details not to be documented.
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*/
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namespace internal {
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struct meta_type_node;
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struct meta_prop_node {
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meta_prop_node * next;
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meta_any(* const key)();
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meta_any(* const value)();
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};
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struct meta_base_node {
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meta_type_node * const parent;
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meta_base_node * next;
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meta_type_node *(* const type)() ENTT_NOEXCEPT;
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void *(* const cast)(void *) ENTT_NOEXCEPT;
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};
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struct meta_conv_node {
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meta_type_node * const parent;
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meta_conv_node * next;
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meta_type_node *(* const type)() ENTT_NOEXCEPT;
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meta_any(* const conv)(const void *);
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};
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struct meta_ctor_node {
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using size_type = std::size_t;
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meta_type_node * const parent;
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meta_ctor_node * next;
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meta_prop_node * prop;
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const size_type size;
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meta_type_node *(* const arg)(size_type) ENTT_NOEXCEPT;
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meta_any(* const invoke)(meta_any * const);
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};
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struct meta_dtor_node {
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meta_type_node * const parent;
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void(* const invoke)(void *);
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};
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struct meta_data_node {
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id_type id;
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meta_type_node * const parent;
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meta_data_node * next;
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meta_prop_node * prop;
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const bool is_static;
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meta_type_node *(* const type)() ENTT_NOEXCEPT;
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bool(* const set)(meta_any, meta_any, meta_any);
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meta_any(* const get)(meta_any, meta_any);
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};
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struct meta_func_node {
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using size_type = std::size_t;
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id_type id;
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meta_type_node * const parent;
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meta_func_node * next;
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meta_prop_node * prop;
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const size_type size;
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const bool is_const;
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const bool is_static;
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meta_type_node *(* const ret)() ENTT_NOEXCEPT;
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meta_type_node *(* const arg)(size_type) ENTT_NOEXCEPT;
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meta_any(* const invoke)(meta_any, meta_any *);
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};
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struct meta_type_node {
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using size_type = std::size_t;
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const id_type type_id;
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id_type id;
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meta_type_node * next;
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meta_prop_node * prop;
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const bool is_void;
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const bool is_integral;
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const bool is_floating_point;
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const bool is_array;
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const bool is_enum;
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const bool is_union;
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const bool is_class;
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const bool is_pointer;
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const bool is_function_pointer;
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const bool is_member_object_pointer;
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const bool is_member_function_pointer;
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const size_type extent;
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bool(* const compare)(const void *, const void *);
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meta_type_node *(* const remove_pointer)() ENTT_NOEXCEPT;
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meta_type_node *(* const remove_extent)() ENTT_NOEXCEPT;
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meta_base_node *base{nullptr};
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meta_conv_node *conv{nullptr};
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meta_ctor_node *ctor{nullptr};
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meta_dtor_node *dtor{nullptr};
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meta_data_node *data{nullptr};
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meta_func_node *func{nullptr};
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};
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template<typename Type, typename Op, typename Node>
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void visit(Op &op, Node *node) {
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while(node) {
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op(Type{node});
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node = node->next;
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}
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}
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template<auto Member, typename Type, typename Op>
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void visit(Op &op, const internal::meta_type_node *node) {
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if(node) {
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internal::visit<Type>(op, node->*Member);
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auto *next = node->base;
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while(next) {
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visit<Member, Type>(op, next->type());
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next = next->next;
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}
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}
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}
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template<typename Op, typename Node>
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auto find_if(const Op &op, Node *node) {
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while(node && !op(node)) {
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node = node->next;
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}
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return node;
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}
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template<auto Member, typename Op>
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auto find_if(const Op &op, const meta_type_node *node)
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-> decltype(find_if(op, node->*Member)) {
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decltype(find_if(op, node->*Member)) ret = nullptr;
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if(node) {
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ret = find_if(op, node->*Member);
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auto *next = node->base;
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while(next && !ret) {
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ret = find_if<Member>(op, next->type());
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next = next->next;
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}
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}
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return ret;
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}
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template<typename Type>
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struct ENTT_API meta_node {
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static_assert(std::is_same_v<Type, std::remove_cv_t<std::remove_reference_t<Type>>>, "Invalid type");
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[[nodiscard]] static bool compare(const void *lhs, const void *rhs) {
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if constexpr(!std::is_function_v<Type> && is_equality_comparable_v<Type>) {
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return *static_cast<const Type *>(lhs) == *static_cast<const Type *>(rhs);
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} else {
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return lhs == rhs;
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}
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}
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[[nodiscard]] static meta_type_node * resolve() ENTT_NOEXCEPT {
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static meta_type_node node{
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type_info<Type>::id(),
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{},
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nullptr,
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nullptr,
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std::is_void_v<Type>,
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std::is_integral_v<Type>,
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std::is_floating_point_v<Type>,
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std::is_array_v<Type>,
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std::is_enum_v<Type>,
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std::is_union_v<Type>,
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std::is_class_v<Type>,
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std::is_pointer_v<Type>,
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std::is_pointer_v<Type> && std::is_function_v<std::remove_pointer_t<Type>>,
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std::is_member_object_pointer_v<Type>,
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std::is_member_function_pointer_v<Type>,
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std::extent_v<Type>,
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&compare, // workaround for an issue with VS2017
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&meta_node<std::remove_const_t<std::remove_pointer_t<Type>>>::resolve,
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&meta_node<std::remove_const_t<std::remove_extent_t<Type>>>::resolve
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};
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return &node;
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}
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};
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template<typename... Type>
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struct meta_info: meta_node<std::remove_cv_t<std::remove_reference_t<Type>>...> {};
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}
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/**
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* Internal details not to be documented.
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* @endcond TURN_OFF_DOXYGEN
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*/
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}
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#endif
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@@ -8,277 +8,16 @@
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#include <utility>
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#include "../config/config.h"
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#include "../core/fwd.hpp"
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#include "../core/type_info.hpp"
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#include "../core/type_traits.hpp"
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#include "ctx.hpp"
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#include "internal.hpp"
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namespace entt {
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class meta_any;
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class meta_type;
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/**
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* @cond TURN_OFF_DOXYGEN
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* Internal details not to be documented.
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*/
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namespace internal {
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struct meta_type_node;
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struct meta_prop_node {
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meta_prop_node * next;
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meta_any(* const key)();
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meta_any(* const value)();
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};
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struct meta_base_node {
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meta_type_node * const parent;
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meta_base_node * next;
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meta_type_node *(* const type)() ENTT_NOEXCEPT;
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void *(* const cast)(void *) ENTT_NOEXCEPT;
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};
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struct meta_conv_node {
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meta_type_node * const parent;
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meta_conv_node * next;
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meta_type_node *(* const type)() ENTT_NOEXCEPT;
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meta_any(* const conv)(const void *);
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};
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struct meta_ctor_node {
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using size_type = std::size_t;
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meta_type_node * const parent;
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meta_ctor_node * next;
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meta_prop_node * prop;
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const size_type size;
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meta_type_node *(* const arg)(size_type) ENTT_NOEXCEPT;
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meta_any(* const invoke)(meta_any * const);
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};
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struct meta_dtor_node {
|
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meta_type_node * const parent;
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void(* const invoke)(void *);
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};
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struct meta_data_node {
|
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id_type id;
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meta_type_node * const parent;
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meta_data_node * next;
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meta_prop_node * prop;
|
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const bool is_static;
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meta_type_node *(* const type)() ENTT_NOEXCEPT;
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bool(* const set)(meta_any, meta_any, meta_any);
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meta_any(* const get)(meta_any, meta_any);
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};
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|
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|
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struct meta_func_node {
|
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using size_type = std::size_t;
|
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id_type id;
|
||||
meta_type_node * const parent;
|
||||
meta_func_node * next;
|
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meta_prop_node * prop;
|
||||
const size_type size;
|
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const bool is_const;
|
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const bool is_static;
|
||||
meta_type_node *(* const ret)() ENTT_NOEXCEPT;
|
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meta_type_node *(* const arg)(size_type) ENTT_NOEXCEPT;
|
||||
meta_any(* const invoke)(meta_any, meta_any *);
|
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};
|
||||
|
||||
|
||||
struct meta_type_node {
|
||||
using size_type = std::size_t;
|
||||
const id_type type_id;
|
||||
id_type id;
|
||||
meta_type_node * next;
|
||||
meta_prop_node * prop;
|
||||
const bool is_void;
|
||||
const bool is_integral;
|
||||
const bool is_floating_point;
|
||||
const bool is_array;
|
||||
const bool is_enum;
|
||||
const bool is_union;
|
||||
const bool is_class;
|
||||
const bool is_pointer;
|
||||
const bool is_function_pointer;
|
||||
const bool is_member_object_pointer;
|
||||
const bool is_member_function_pointer;
|
||||
const size_type extent;
|
||||
bool(* const compare)(const void *, const void *);
|
||||
meta_type_node *(* const remove_pointer)() ENTT_NOEXCEPT;
|
||||
meta_type_node *(* const remove_extent)() ENTT_NOEXCEPT;
|
||||
meta_base_node *base{nullptr};
|
||||
meta_conv_node *conv{nullptr};
|
||||
meta_ctor_node *ctor{nullptr};
|
||||
meta_dtor_node *dtor{nullptr};
|
||||
meta_data_node *data{nullptr};
|
||||
meta_func_node *func{nullptr};
|
||||
};
|
||||
|
||||
|
||||
template<typename Type, typename Op, typename Node>
|
||||
void visit(Op &op, Node *node) {
|
||||
while(node) {
|
||||
op(Type{node});
|
||||
node = node->next;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
template<auto Member, typename Type, typename Op>
|
||||
void visit(Op &op, const internal::meta_type_node *node) {
|
||||
if(node) {
|
||||
internal::visit<Type>(op, node->*Member);
|
||||
auto *next = node->base;
|
||||
|
||||
while(next) {
|
||||
visit<Member, Type>(op, next->type());
|
||||
next = next->next;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
template<typename Op, typename Node>
|
||||
auto find_if(const Op &op, Node *node) {
|
||||
while(node && !op(node)) {
|
||||
node = node->next;
|
||||
}
|
||||
|
||||
return node;
|
||||
}
|
||||
|
||||
|
||||
template<auto Member, typename Op>
|
||||
auto find_if(const Op &op, const meta_type_node *node)
|
||||
-> decltype(find_if(op, node->*Member)) {
|
||||
decltype(find_if(op, node->*Member)) ret = nullptr;
|
||||
|
||||
if(node) {
|
||||
ret = find_if(op, node->*Member);
|
||||
auto *next = node->base;
|
||||
|
||||
while(next && !ret) {
|
||||
ret = find_if<Member>(op, next->type());
|
||||
next = next->next;
|
||||
}
|
||||
}
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
|
||||
template<typename Type>
|
||||
[[nodiscard]] bool compare(const void *lhs, const void *rhs) {
|
||||
if constexpr(!std::is_function_v<Type> && is_equality_comparable_v<Type>) {
|
||||
return *static_cast<const Type *>(lhs) == *static_cast<const Type *>(rhs);
|
||||
} else {
|
||||
return lhs == rhs;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
struct ENTT_API meta_context {
|
||||
// we could use the lines below but VS2017 returns with an ICE if combined with ENTT_API despite the code being valid C++
|
||||
// inline static meta_type_node *local = nullptr;
|
||||
// inline static meta_type_node **global = &local;
|
||||
|
||||
[[nodiscard]] static meta_type_node * & local() ENTT_NOEXCEPT {
|
||||
static meta_type_node *chain = nullptr;
|
||||
return chain;
|
||||
}
|
||||
|
||||
[[nodiscard]] static meta_type_node ** & global() ENTT_NOEXCEPT {
|
||||
static meta_type_node **chain = &local();
|
||||
return chain;
|
||||
}
|
||||
|
||||
static void detach(const meta_type_node *node) ENTT_NOEXCEPT {
|
||||
auto **it = global();
|
||||
|
||||
while(*it && *it != node) {
|
||||
it = &(*it)->next;
|
||||
}
|
||||
|
||||
if(*it) {
|
||||
*it = (*it)->next;
|
||||
}
|
||||
}
|
||||
};
|
||||
|
||||
|
||||
template<typename Type>
|
||||
struct ENTT_API meta_node {
|
||||
static_assert(std::is_same_v<Type, std::remove_cv_t<std::remove_reference_t<Type>>>, "Invalid type");
|
||||
|
||||
[[nodiscard]] static meta_type_node * resolve() ENTT_NOEXCEPT {
|
||||
static meta_type_node node{
|
||||
type_info<Type>::id(),
|
||||
{},
|
||||
nullptr,
|
||||
nullptr,
|
||||
std::is_void_v<Type>,
|
||||
std::is_integral_v<Type>,
|
||||
std::is_floating_point_v<Type>,
|
||||
std::is_array_v<Type>,
|
||||
std::is_enum_v<Type>,
|
||||
std::is_union_v<Type>,
|
||||
std::is_class_v<Type>,
|
||||
std::is_pointer_v<Type>,
|
||||
std::is_pointer_v<Type> && std::is_function_v<std::remove_pointer_t<Type>>,
|
||||
std::is_member_object_pointer_v<Type>,
|
||||
std::is_member_function_pointer_v<Type>,
|
||||
std::extent_v<Type>,
|
||||
&compare<Type>, // workaround for an issue with VS2017
|
||||
&meta_node<std::remove_const_t<std::remove_pointer_t<Type>>>::resolve,
|
||||
&meta_node<std::remove_const_t<std::remove_extent_t<Type>>>::resolve
|
||||
};
|
||||
|
||||
return &node;
|
||||
}
|
||||
};
|
||||
|
||||
|
||||
template<typename... Type>
|
||||
struct meta_info: meta_node<std::remove_cv_t<std::remove_reference_t<Type>>...> {};
|
||||
|
||||
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* Internal details not to be documented.
|
||||
* @endcond TURN_OFF_DOXYGEN
|
||||
*/
|
||||
|
||||
|
||||
/*! @brief Opaque container for a meta context. */
|
||||
struct meta_ctx {
|
||||
/**
|
||||
* @brief Binds the meta system to a given context.
|
||||
* @param other A valid context to which to bind.
|
||||
*/
|
||||
static void bind(meta_ctx other) ENTT_NOEXCEPT {
|
||||
internal::meta_context::global() = other.ctx;
|
||||
}
|
||||
|
||||
private:
|
||||
internal::meta_type_node **ctx{&internal::meta_context::local()};
|
||||
};
|
||||
|
||||
|
||||
/**
|
||||
* @brief Opaque container for values of any type.
|
||||
*
|
||||
|
||||
Reference in New Issue
Block a user