271 lines
14 KiB
C++
271 lines
14 KiB
C++
/*************************************************************************/
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/* type_info.h */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md). */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#ifndef TYPE_INFO_H
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#define TYPE_INFO_H
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#include "core/typedefs.h"
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template <bool C, typename T = void>
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struct EnableIf {
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typedef T type;
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};
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template <typename T>
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struct EnableIf<false, T> {
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};
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template <typename, typename>
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struct TypesAreSame {
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static bool const value = false;
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};
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template <typename A>
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struct TypesAreSame<A, A> {
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static bool const value = true;
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};
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template <typename B, typename D>
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struct TypeInherits {
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static D *get_d();
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static char (&test(B *))[1];
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static char (&test(...))[2];
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static bool const value = sizeof(test(get_d())) == sizeof(char) &&
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!TypesAreSame<B volatile const, void volatile const>::value;
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};
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namespace GodotTypeInfo {
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enum Metadata {
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METADATA_NONE,
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METADATA_INT_IS_INT8,
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METADATA_INT_IS_INT16,
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METADATA_INT_IS_INT32,
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METADATA_INT_IS_INT64,
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METADATA_INT_IS_UINT8,
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METADATA_INT_IS_UINT16,
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METADATA_INT_IS_UINT32,
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METADATA_INT_IS_UINT64,
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METADATA_REAL_IS_FLOAT,
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METADATA_REAL_IS_DOUBLE
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};
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}
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// If the compiler fails because it's trying to instantiate the primary 'GetTypeInfo' template
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// instead of one of the specializations, it's most likely because the type 'T' is not supported.
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// If 'T' is a class that inherits 'Object', make sure it can see the actual class declaration
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// instead of a forward declaration. You can always forward declare 'T' in a header file, and then
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// include the actual declaration of 'T' in the source file where 'GetTypeInfo<T>' is instantiated.
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template <class T, typename = void>
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struct GetTypeInfo;
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#define MAKE_TYPE_INFO(m_type, m_var_type) \
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template <> \
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struct GetTypeInfo<m_type> { \
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static const Variant::Type VARIANT_TYPE = m_var_type; \
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static const GodotTypeInfo::Metadata METADATA = GodotTypeInfo::METADATA_NONE; \
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static inline PropertyInfo get_class_info() { \
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return PropertyInfo(VARIANT_TYPE, String()); \
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} \
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}; \
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template <> \
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struct GetTypeInfo<const m_type &> { \
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static const Variant::Type VARIANT_TYPE = m_var_type; \
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static const GodotTypeInfo::Metadata METADATA = GodotTypeInfo::METADATA_NONE; \
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static inline PropertyInfo get_class_info() { \
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return PropertyInfo(VARIANT_TYPE, String()); \
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} \
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};
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#define MAKE_TYPE_INFO_WITH_META(m_type, m_var_type, m_metadata) \
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template <> \
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struct GetTypeInfo<m_type> { \
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static const Variant::Type VARIANT_TYPE = m_var_type; \
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static const GodotTypeInfo::Metadata METADATA = m_metadata; \
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static inline PropertyInfo get_class_info() { \
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return PropertyInfo(VARIANT_TYPE, String()); \
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} \
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}; \
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template <> \
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struct GetTypeInfo<const m_type &> { \
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static const Variant::Type VARIANT_TYPE = m_var_type; \
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static const GodotTypeInfo::Metadata METADATA = m_metadata; \
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static inline PropertyInfo get_class_info() { \
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return PropertyInfo(VARIANT_TYPE, String()); \
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} \
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};
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MAKE_TYPE_INFO(bool, Variant::BOOL)
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MAKE_TYPE_INFO_WITH_META(uint8_t, Variant::INT, GodotTypeInfo::METADATA_INT_IS_UINT8)
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MAKE_TYPE_INFO_WITH_META(int8_t, Variant::INT, GodotTypeInfo::METADATA_INT_IS_INT8)
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MAKE_TYPE_INFO_WITH_META(uint16_t, Variant::INT, GodotTypeInfo::METADATA_INT_IS_UINT16)
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MAKE_TYPE_INFO_WITH_META(int16_t, Variant::INT, GodotTypeInfo::METADATA_INT_IS_INT16)
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MAKE_TYPE_INFO_WITH_META(uint32_t, Variant::INT, GodotTypeInfo::METADATA_INT_IS_UINT32)
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MAKE_TYPE_INFO_WITH_META(int32_t, Variant::INT, GodotTypeInfo::METADATA_INT_IS_INT32)
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MAKE_TYPE_INFO_WITH_META(uint64_t, Variant::INT, GodotTypeInfo::METADATA_INT_IS_UINT64)
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MAKE_TYPE_INFO_WITH_META(int64_t, Variant::INT, GodotTypeInfo::METADATA_INT_IS_INT64)
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MAKE_TYPE_INFO(char16_t, Variant::INT)
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MAKE_TYPE_INFO(char32_t, Variant::INT)
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MAKE_TYPE_INFO_WITH_META(float, Variant::FLOAT, GodotTypeInfo::METADATA_REAL_IS_FLOAT)
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MAKE_TYPE_INFO_WITH_META(double, Variant::FLOAT, GodotTypeInfo::METADATA_REAL_IS_DOUBLE)
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MAKE_TYPE_INFO(String, Variant::STRING)
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MAKE_TYPE_INFO(Vector2, Variant::VECTOR2)
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MAKE_TYPE_INFO(Rect2, Variant::RECT2)
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MAKE_TYPE_INFO(Vector3, Variant::VECTOR3)
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MAKE_TYPE_INFO(Vector2i, Variant::VECTOR2I)
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MAKE_TYPE_INFO(Rect2i, Variant::RECT2I)
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MAKE_TYPE_INFO(Vector3i, Variant::VECTOR3I)
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MAKE_TYPE_INFO(Transform2D, Variant::TRANSFORM2D)
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MAKE_TYPE_INFO(Plane, Variant::PLANE)
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MAKE_TYPE_INFO(Quat, Variant::QUAT)
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MAKE_TYPE_INFO(AABB, Variant::AABB)
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MAKE_TYPE_INFO(Basis, Variant::BASIS)
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MAKE_TYPE_INFO(Transform3D, Variant::TRANSFORM)
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MAKE_TYPE_INFO(Color, Variant::COLOR)
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MAKE_TYPE_INFO(StringName, Variant::STRING_NAME)
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MAKE_TYPE_INFO(NodePath, Variant::NODE_PATH)
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MAKE_TYPE_INFO(RID, Variant::RID)
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MAKE_TYPE_INFO(Callable, Variant::CALLABLE)
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MAKE_TYPE_INFO(Signal, Variant::SIGNAL)
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MAKE_TYPE_INFO(Dictionary, Variant::DICTIONARY)
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MAKE_TYPE_INFO(Array, Variant::ARRAY)
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MAKE_TYPE_INFO(PackedByteArray, Variant::PACKED_BYTE_ARRAY)
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MAKE_TYPE_INFO(PackedInt32Array, Variant::PACKED_INT32_ARRAY)
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MAKE_TYPE_INFO(PackedInt64Array, Variant::PACKED_INT64_ARRAY)
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MAKE_TYPE_INFO(PackedFloat32Array, Variant::PACKED_FLOAT32_ARRAY)
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MAKE_TYPE_INFO(PackedFloat64Array, Variant::PACKED_FLOAT64_ARRAY)
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MAKE_TYPE_INFO(PackedStringArray, Variant::PACKED_STRING_ARRAY)
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MAKE_TYPE_INFO(PackedVector2Array, Variant::PACKED_VECTOR2_ARRAY)
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MAKE_TYPE_INFO(PackedVector3Array, Variant::PACKED_VECTOR3_ARRAY)
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MAKE_TYPE_INFO(PackedColorArray, Variant::PACKED_COLOR_ARRAY)
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MAKE_TYPE_INFO(IPAddress, Variant::STRING)
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//objectID
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template <>
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struct GetTypeInfo<ObjectID> {
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static const Variant::Type VARIANT_TYPE = Variant::INT;
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static const GodotTypeInfo::Metadata METADATA = GodotTypeInfo::METADATA_INT_IS_UINT64;
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static inline PropertyInfo get_class_info() {
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return PropertyInfo(Variant::INT, String(), PROPERTY_HINT_INT_IS_OBJECTID);
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}
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};
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//for variant
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template <>
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struct GetTypeInfo<Variant> {
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static const Variant::Type VARIANT_TYPE = Variant::NIL;
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static const GodotTypeInfo::Metadata METADATA = GodotTypeInfo::METADATA_NONE;
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static inline PropertyInfo get_class_info() {
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return PropertyInfo(Variant::NIL, String(), PROPERTY_HINT_NONE, String(), PROPERTY_USAGE_DEFAULT | PROPERTY_USAGE_NIL_IS_VARIANT);
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}
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};
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template <>
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struct GetTypeInfo<const Variant &> {
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static const Variant::Type VARIANT_TYPE = Variant::NIL;
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static const GodotTypeInfo::Metadata METADATA = GodotTypeInfo::METADATA_NONE;
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static inline PropertyInfo get_class_info() {
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return PropertyInfo(Variant::NIL, String(), PROPERTY_HINT_NONE, String(), PROPERTY_USAGE_DEFAULT | PROPERTY_USAGE_NIL_IS_VARIANT);
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}
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};
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#define MAKE_TEMPLATE_TYPE_INFO(m_template, m_type, m_var_type) \
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template <> \
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struct GetTypeInfo<m_template<m_type>> { \
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static const Variant::Type VARIANT_TYPE = m_var_type; \
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static const GodotTypeInfo::Metadata METADATA = GodotTypeInfo::METADATA_NONE; \
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static inline PropertyInfo get_class_info() { \
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return PropertyInfo(VARIANT_TYPE, String()); \
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} \
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}; \
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template <> \
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struct GetTypeInfo<const m_template<m_type> &> { \
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static const Variant::Type VARIANT_TYPE = m_var_type; \
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static const GodotTypeInfo::Metadata METADATA = GodotTypeInfo::METADATA_NONE; \
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static inline PropertyInfo get_class_info() { \
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return PropertyInfo(VARIANT_TYPE, String()); \
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} \
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};
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MAKE_TEMPLATE_TYPE_INFO(Vector, Variant, Variant::ARRAY)
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MAKE_TEMPLATE_TYPE_INFO(Vector, RID, Variant::ARRAY)
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MAKE_TEMPLATE_TYPE_INFO(Vector, Plane, Variant::ARRAY)
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MAKE_TEMPLATE_TYPE_INFO(Vector, Face3, Variant::PACKED_VECTOR3_ARRAY)
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MAKE_TEMPLATE_TYPE_INFO(Vector, StringName, Variant::PACKED_STRING_ARRAY)
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template <typename T>
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struct GetTypeInfo<T *, typename EnableIf<TypeInherits<Object, T>::value>::type> {
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static const Variant::Type VARIANT_TYPE = Variant::OBJECT;
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static const GodotTypeInfo::Metadata METADATA = GodotTypeInfo::METADATA_NONE;
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static inline PropertyInfo get_class_info() {
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return PropertyInfo(StringName(T::get_class_static()));
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}
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};
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template <typename T>
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struct GetTypeInfo<const T *, typename EnableIf<TypeInherits<Object, T>::value>::type> {
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static const Variant::Type VARIANT_TYPE = Variant::OBJECT;
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static const GodotTypeInfo::Metadata METADATA = GodotTypeInfo::METADATA_NONE;
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static inline PropertyInfo get_class_info() {
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return PropertyInfo(StringName(T::get_class_static()));
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}
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};
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#define TEMPL_MAKE_ENUM_TYPE_INFO(m_enum, m_impl) \
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template <> \
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struct GetTypeInfo<m_impl> { \
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static const Variant::Type VARIANT_TYPE = Variant::INT; \
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static const GodotTypeInfo::Metadata METADATA = GodotTypeInfo::METADATA_NONE; \
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static inline PropertyInfo get_class_info() { \
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return PropertyInfo(Variant::INT, String(), PROPERTY_HINT_NONE, String(), PROPERTY_USAGE_DEFAULT | PROPERTY_USAGE_CLASS_IS_ENUM, String(#m_enum).replace("::", ".")); \
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} \
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};
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#define MAKE_ENUM_TYPE_INFO(m_enum) \
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TEMPL_MAKE_ENUM_TYPE_INFO(m_enum, m_enum) \
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TEMPL_MAKE_ENUM_TYPE_INFO(m_enum, m_enum const) \
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TEMPL_MAKE_ENUM_TYPE_INFO(m_enum, m_enum &) \
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TEMPL_MAKE_ENUM_TYPE_INFO(m_enum, const m_enum &)
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template <typename T>
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inline StringName __constant_get_enum_name(T param, const String &p_constant) {
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if (GetTypeInfo<T>::VARIANT_TYPE == Variant::NIL) {
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ERR_PRINT("Missing VARIANT_ENUM_CAST for constant's enum: " + p_constant);
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}
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return GetTypeInfo<T>::get_class_info().class_name;
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}
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#define CLASS_INFO(m_type) (GetTypeInfo<m_type *>::get_class_info())
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#endif // TYPE_INFO_H
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