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Use <filesystem> for VS2026 (MSVC Build Tools v14.51) #497

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lo-simon merged 1 commit into from
Jun 24, 2026
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Use <filesystem> for VS2026 (MSVC Build Tools v14.51) #497

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7 changes: 6 additions & 1 deletion Development/bst/filesystem.h
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Original file line number Diff line number Diff line change
Expand Up @@ -15,7 +15,12 @@

#elif defined(_MSC_VER)

#if _MSC_VER >= 1910
#if _MSC_VER >= 1951

@lo-simon lo-simon Jun 24, 2026

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Shouldn't it be 1950 instead of 1951?
See MSCV Build Tools version table in https://learn.microsoft.com/en-us/cpp/overview/compiler-versions?view=msvc-180

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@garethsb garethsb Jun 24, 2026

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No, not according to the release notes that I linked.

@lo-simon lo-simon Jun 24, 2026

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Yes, you are right.

// From VS2026, or more precisely, MSVC Build Tools v14.51, <experimental/filesystem> is finally removed
// See https://learn.microsoft.com/en-us/visualstudio/releases/2026/release-notes
// and https://github.com/microsoft/STL/pull/5765
#define BST_FILESYSTEM_STD
#elif _MSC_VER >= 1910
// From VS2017, /std:c++17 switch is introduced, but this is only indicated in __cplusplus if /Zc:__cplusplus is also specified
#if __cplusplus >= 201703L
#define BST_FILESYSTEM_STD
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