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1//-------------------------------------------------------------------------------------------------------------------------------------------------------------2//3// Foundation/NSDefines.hpp4//5// Copyright 2020-2024 Apple Inc.6//7// Licensed under the Apache License, Version 2.0 (the "License");8// you may not use this file except in compliance with the License.9// You may obtain a copy of the License at10//11// http://www.apache.org/licenses/LICENSE-2.012//13// Unless required by applicable law or agreed to in writing, software14// distributed under the License is distributed on an "AS IS" BASIS,15// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.16// See the License for the specific language governing permissions and17// limitations under the License.18//19//-------------------------------------------------------------------------------------------------------------------------------------------------------------2021#pragma once2223//-------------------------------------------------------------------------------------------------------------------------------------------------------------2425#define _NS_WEAK_IMPORT __attribute__((weak_import))26#ifdef METALCPP_SYMBOL_VISIBILITY_HIDDEN27#define _NS_EXPORT __attribute__((visibility("hidden")))28#else29#define _NS_EXPORT __attribute__((visibility("default")))30#endif // METALCPP_SYMBOL_VISIBILITY_HIDDEN31#define _NS_EXTERN extern "C" _NS_EXPORT32#define _NS_INLINE inline __attribute__((always_inline))33#define _NS_PACKED __attribute__((packed))3435#define _NS_CONST(type, name) _NS_EXTERN type const name36#define _NS_ENUM(type, name) enum name : type37#define _NS_OPTIONS(type, name) \38 using name = type; \39 enum : name4041#define _NS_CAST_TO_UINT(value) static_cast<NS::UInteger>(value)42#define _NS_VALIDATE_SIZE(ns, name) static_assert(sizeof(ns::name) == sizeof(ns##name), "size mismatch " #ns "::" #name)43#define _NS_VALIDATE_ENUM(ns, name) static_assert(_NS_CAST_TO_UINT(ns::name) == _NS_CAST_TO_UINT(ns##name), "value mismatch " #ns "::" #name)4445//-------------------------------------------------------------------------------------------------------------------------------------------------------------46