fl_attr.h

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/*
 * Function attribute declarations for the Fast Light Tool Kit (FLTK).
 *
 * Copyright 1998-2023 by Bill Spitzak and others.
 *
 * This library is free software. Distribution and use rights are outlined in
 * the file "COPYING" which should have been included with this file.  If this
 * file is missing or damaged, see the license at:
 *
 *     https://www.fltk.org/COPYING.php
 *
 * Please see the following page on how to report bugs and issues:
 *
 *     https://www.fltk.org/bugs.php
 */
 
#ifndef _FL_fl_attr_h_
#define _FL_fl_attr_h_
 
 
#ifdef FL_DOXYGEN
 
 
#define __fl_attr(x)
 
#define FL_OVERRIDE override
 
#define FL_DEPRECATED(msg, func) \
  /##*##* \deprecated msg *##/ \
  func
 
 
#else /* FL_DOXYGEN */
 
#ifdef __cplusplus
 
/*
  Declare macros specific to Visual Studio.
 
  Visual Studio defines __cplusplus = '199711L' in all its versions which is
  not helpful for us here. For VS version number encoding see:
  https://learn.microsoft.com/en-us/cpp/preprocessor/predefined-macros
 
  This document specifies that the macro _MSVC_LANG is defined since
  "Visual Studio 2015 Update 3" as 201402L (default) and undefined in
  earlier versions. It can be used to determine the C++ standard as
  specified by the /std:c++ compiler option:
 
  - /std:c++14      201402L  (also if /std:c++ is not used)
  - /std:c++17      201703L
  - /std:c++20      202002L
  - /std:c++latest  a "higher, unspecified value" (docs of VS 2022)
 
  As of this writing (02/2023) _MSVC_LANG is not yet used in this file
  but it is documented for future use.
*/
 
#if defined(_MSC_VER)
 
#if (_MSC_VER >= 1900) // Visual Studio 2015 (14.0)
#ifndef FL_OVERRIDE
#define FL_OVERRIDE override
#endif
#endif // Visual Studio 2015 (14.0)
 
#if (_MSC_VER >= 1400) // Visual Studio 2005 (8.0)
#ifndef FL_DEPRECATED
#define FL_DEPRECATED(msg, func) __declspec(deprecated(msg)) func
#endif
#endif // Visual Studio 2005 (8.0)
 
#if (_MSC_VER >= 1310) // Visual Studio .NET 2003 (7.1)
#ifndef FL_DEPRECATED
#define FL_DEPRECATED(msg, func) __declspec(deprecated) func
#endif
#endif // Visual Studio .NET 2003 (7.1)
 
#endif // Visual Studio
 
 
/*
 Declare macros specific to the C++ standard used.
 
 Macros may have been declared already in previous sections.
 */
#if (__cplusplus >= 202002L) // C++20
#endif // C++20
 
#if (__cplusplus >= 201703L) // C++17
#endif // C++17
 
#if (__cplusplus >= 201402L) // C++14
#ifndef FL_DEPRECATED
#define FL_DEPRECATED(msg, func) [[deprecated(msg)]] func
#endif
#endif // C++14
 
#if (__cplusplus >= 201103L) // C++11
#ifndef FL_OVERRIDE
#define FL_OVERRIDE override
#endif
#endif // C+11
 
#if (__cplusplus >= 199711L) // C++89
#endif // C++89
 
#endif // __cplusplus
 
/*
 Declare macros specific to clang
 
 Macros may have been declared already in previous sections.
 */
#if defined(__clang__)
 
#define FL_CLANG_VERSION (__clang_major__ * 10000 + __clang_minor__ * 100 + __clang_patchlevel__)
 
// -- nothing yet --
 
#endif // __clang__
 
 
/*
 Declare macros specific to gcc.
 
 Macros may have been declared already in previous sections.
 */
#if defined(__GNUC__)
 
#define FL_GCC_VERSION (__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__)
 
#ifndef __fl_attr
#define __fl_attr(x) __attribute__ (x)
#endif
 
#if FL_GCC_VERSION > 40500 // gcc 4.5.0
#ifndef FL_DEPRECATED
#define FL_DEPRECATED(msg, func) func __attribute__((deprecated(msg)))
#endif
#endif // gcc 4.5.0
 
#if FL_GCC_VERSION > 30100 // gcc 3.1.0
#ifndef FL_DEPRECATED
#define FL_DEPRECATED(msg, func) func __attribute__((deprecated))
#endif
#endif // gcc 3.1.0
 
#endif // __GNUC__
 
 
/*
 If a macro was not defined in any of the sections above, set it to no-op here.
 */
 
#ifndef __fl_attr
#define __fl_attr(x)
#endif
 
#ifndef FL_OVERRIDE
#define FL_OVERRIDE
#endif
 
#ifndef FL_DEPRECATED
#define FL_DEPRECATED(msg, func) func
#endif
 
 
#endif /* FL_DOXYGEN */
 
 
#endif /* !_FL_fl_attr_h_ */