71 lines
1.9 KiB
C++
71 lines
1.9 KiB
C++
#pragma once
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// Check for feature test macro for <filesystem>
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#if defined(__cpp_lib_filesystem)
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#define INCLUDE_STD_FILESYSTEM_EXPERIMENTAL 0
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// Check for feature test macro for <experimental/filesystem>
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#elif defined(__cpp_lib_experimental_filesystem)
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#define INCLUDE_STD_FILESYSTEM_EXPERIMENTAL 1
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// We can't check if headers exist...
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// Let's assume experimental to be safe
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#elif !defined(__has_include)
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#define INCLUDE_STD_FILESYSTEM_EXPERIMENTAL 1
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// Check if the header "<filesystem>" exists
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#elif __has_include(<filesystem>)
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// If we're compiling on Visual Studio and are not compiling with C++17, we need
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// to use experimental
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#ifdef _MSC_VER
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// Check and include header that defines "_HAS_CXX17"
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#if __has_include(<yvals_core.h>)
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#include <yvals_core.h>
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// Check for enabled C++17 support
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#if defined(_HAS_CXX17) && _HAS_CXX17
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// We're using C++17, so let's use the normal version
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#define INCLUDE_STD_FILESYSTEM_EXPERIMENTAL 0
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#endif
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#endif
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// If the marco isn't defined yet, that means any of the other VS specific
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// checks failed, so we need to use experimental
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#ifndef INCLUDE_STD_FILESYSTEM_EXPERIMENTAL
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#define INCLUDE_STD_FILESYSTEM_EXPERIMENTAL 1
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#endif
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// Not on Visual Studio. Let's use the normal version
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#else // #ifdef _MSC_VER
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#define INCLUDE_STD_FILESYSTEM_EXPERIMENTAL 0
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#endif
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// Check if the header "<filesystem>" exists
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#elif __has_include(<experimental/filesystem>)
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#define INCLUDE_STD_FILESYSTEM_EXPERIMENTAL 1
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// Fail if neither header is available with a nice error message
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#else
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#error Could not find system header "<filesystem>" or "<experimental/filesystem>"
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#endif
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// We priously determined that we need the exprimental version
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#if INCLUDE_STD_FILESYSTEM_EXPERIMENTAL
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#include <experimental/filesystem>
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namespace basalt {
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namespace fs = std::experimental::filesystem;
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}
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// We have a decent compiler and can use the normal version
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#else
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#include <filesystem>
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namespace basalt {
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namespace fs = std::filesystem;
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}
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#endif
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