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///////////////////////////////////////////////////////////////////////////////
// Name: wx/osx/private/available.h
// Purpose: Helper for checking API availability under macOS.
// Author: Vadim Zeitlin
// Created: 2019-04-17
// Copyright: (c) 2019 Vadim Zeitlin <vadim@wxwidgets.org>
// Licence: wxWindows licence
///////////////////////////////////////////////////////////////////////////////
#ifndef _WX_OSX_PRIVATE_AVAILABLE_H_
#define _WX_OSX_PRIVATE_AVAILABLE_H_
// Xcode 9 adds new @available keyword and the corresponding __builtin_available
// builtin which should be used instead of manual checks for API availability
// as using this builtin suppresses the compiler -Wunguarded-availability
// warnings, so use it if possible for the implementation of our own macro.
#if defined(__clang__) && __has_builtin(__builtin_available)
#define WX_IS_MACOS_AVAILABLE(major, minor) \
__builtin_available(macOS major ## . ## minor, *)
#define WX_IS_MACOS_OR_IOS_AVAILABLE(macmajor, macminor, imajor, iminor) \
__builtin_available(macOS macmajor ## . ## macminor, iOS imajor ##. ## iminor, *)
#define WX_IS_MACOS_AVAILABLE_FULL(major, minor, micro) \
__builtin_available(macOS major ## . ## minor ## . ## micro, *)
// Note that we can't easily forward to API_AVAILABLE macro here, so go
// directly to its expansion instead.
#define WX_API_AVAILABLE_MACOS(major, minor) \
__attribute__((availability(macos,introduced=major ## . ## minor)))
#else // Not clang or old clang version without __builtin_available
#include "wx/platinfo.h"
#define WX_IS_MACOS_AVAILABLE(major, minor) \
wxPlatformInfo::Get().CheckOSVersion(major, minor)
#ifdef wxOSX_USE_IPHONE
#define WX_IS_MACOS_OR_IOS_AVAILABLE(macmajor, macminor, imajor, iminor) \
wxPlatformInfo::Get().CheckOSVersion(imajor, iminor)
#else
#define WX_IS_MACOS_OR_IOS_AVAILABLE(macmajor, macminor, imajor, iminor) \
wxPlatformInfo::Get().CheckOSVersion(macmajor, macminor)
#endif
#define WX_IS_MACOS_AVAILABLE_FULL(major, minor, micro) \
wxPlatformInfo::Get().CheckOSVersion(major, minor, micro)
#define WX_API_AVAILABLE_MACOS(major, minor)
#endif
#endif // _WX_OSX_PRIVATE_AVAILABLE_H_
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