environment.hpp

// Copyright (c) 2024-2025 xlnt-community
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE
//
// @license: http://www.opensource.org/licenses/mit-license.php
// @author: see AUTHORS file

#pragma once

// Unfortunately, the macro __cplusplus does not report the correct version under Visual Studio unless /Zc:__cplusplus is used during compilation.
// Source: https://learn.microsoft.com/en-us/cpp/build/reference/zc-cplusplus?view=msvc-170
// In order to have proper feature testing for C++ features that don't have feature test macros, but also to avoid forcing others
// to configure their compiler properly, we'll need to define our own macro.
#ifndef XLNT_CPP_VERSION
  #if defined(_MSVC_LANG) && _MSVC_LANG > __cplusplus // take the larger one of the two (Microsoft does the same in the MSVC STL)
    #define XLNT_CPP_VERSION _MSVC_LANG
  #else
    #define XLNT_CPP_VERSION __cplusplus
  #endif
#endif

#define XLNT_CPP_11 201103L
#define XLNT_CPP_14 201402L
#define XLNT_CPP_17 201703L
#define XLNT_CPP_20 202002L
#define XLNT_CPP_23 202302L
// TODO: when C++26 is out, please update the C version check below as well!
//#define XLNT_CPP_26 TODO_VERSION

#define XLNT_HAS_CPP_VERSION(version) (1/version == 1/version && XLNT_CPP_VERSION >= version)


#define XLNT_C_99 199901L
#define XLNT_C_11 201112L
#define XLNT_C_17 201710L
#define XLNT_C_23 202311L

#define XLNT_HAS_C_VERSION(version) (1/version == 1/version && \
    ((__STDC_VERSION__ >= version) || \
     (XLNT_C_99 >= version && XLNT_HAS_CPP_VERSION(XLNT_CPP_11)) || \
     (XLNT_C_11 >= version && XLNT_HAS_CPP_VERSION(XLNT_CPP_17)) || \
     (XLNT_C_17 >= version && XLNT_HAS_CPP_VERSION(XLNT_CPP_20)) /*|| \
     (CLNT_C_23 >= version && XLNT_HAS_CPP_VERSION(XLNT_CPP_26))*/ \
     ))