microsoft

microsoft/STL

MSVC's implementation of the C++ Standard Library.

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19 Open Issues Need Help Last updated: Jul 1, 2026

Open Issues Need Help

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`<__msvc_int128.hpp>`, `<xcharconv_ryu.h>`: Consider unifying `_Base128::_UMul128()` and `__ryu_umul128()` 5 days ago

enhancement help wanted performance

11.1K

MSVC's implementation of the C++ Standard Library.

C++

`<yvals_core.h>`: Update `_MSVC_STL_UPDATE` to July 2026 6 days ago

enhancement good first issue

11.1K

MSVC's implementation of the C++ Standard Library.

C++

Clang/LLVM tracking issue about 1 month ago

help wanted compiler

11.1K

MSVC's implementation of the C++ Standard Library.

C++

`P2278R4_views_as_const`: Clang 22 emits error: satisfaction of constraint '`__is_constructible(_Ty, _ArgTys...)`' depends on itself about 2 months ago

help wanted ranges compiler

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MSVC's implementation of the C++ Standard Library.

C++

`GH_000140_adl_proof_comparison`: Clang 22 rejects `test_adl_proof_optional_comparison()` about 2 months ago

help wanted compiler

11.1K

MSVC's implementation of the C++ Standard Library.

C++

`P0009R18_mdspan_layout_stride`: Clang 22 rejects `check_construction_from_other_mappings()` about 2 months ago

help wanted compiler mdspan

11.1K

MSVC's implementation of the C++ Standard Library.

C++

Report EDG bugs about 2 months ago

help wanted compiler

11.1K

MSVC's implementation of the C++ Standard Library.

C++

`README.md`: Update working draft revision to N5046 about 2 months ago

documentation good first issue

11.1K

MSVC's implementation of the C++ Standard Library.

C++

`<yvals_core.h>`: Update `_MSVC_STL_UPDATE` to March 2026 4 months ago

enhancement good first issue

11.1K

MSVC's implementation of the C++ Standard Library.

C++

Tests: Mentions of "non-standard guarantee" should be removed 5 months ago

documentation good first issue

11.1K

MSVC's implementation of the C++ Standard Library.

C++

`<yvals_core.h>`: Update `_MSVC_STL_UPDATE` to February 2026 5 months ago

enhancement good first issue

11.1K

MSVC's implementation of the C++ Standard Library.

C++

`<yvals_core.h>`: Update `_MSVC_STL_UPDATE` to January 2026 6 months ago

enhancement good first issue

11.1K

MSVC's implementation of the C++ Standard Library.

C++

`<yvals_core.h>`: Update `_MSVC_STL_UPDATE` to December 2025 7 months ago

enhancement good first issue

11.1K

MSVC's implementation of the C++ Standard Library.

C++

`<yvals_core.h>`: Update `_MSVC_STL_UPDATE` to November 2025 8 months ago

enhancement good first issue

11.1K

MSVC's implementation of the C++ Standard Library.

C++

`<yvals_core.h>`: Update `_MSVC_STL_UPDATE` to October 2025 9 months ago

enhancement good first issue

11.1K

MSVC's implementation of the C++ Standard Library.

C++

`<yvals_core.h>`: Update `_MSVC_STL_UPDATE` to September 2025 10 months ago

AI Summary: This issue requests an update to the `_MSVC_STL_UPDATE` macro in `yvals_core.h`, changing its value to September 2025. It is explicitly designated as a 'good first issue' for new contributors, providing all necessary links and instructions for a simple code change.

Complexity: 1/5

enhancement good first issue

11.1K

MSVC's implementation of the C++ Standard Library.

C++

`README.md`: Update working draft revision to N5014 11 months ago

documentation good first issue

11.1K

MSVC's implementation of the C++ Standard Library.

C++

`<yvals_core.h>`: Update `_MSVC_STL_UPDATE` to August 2025 11 months ago

AI Summary: Update the `_MSVC_STL_UPDATE` macro in the `yvals_core.h` header file to August 2025. This involves a simple text change in a specified line of code, and is intended as an introductory task for new contributors.

Complexity: 1/5

enhancement good first issue

11.1K

MSVC's implementation of the C++ Standard Library.

C++

`<yvals_core.h>`: Update `_MSVC_STL_UPDATE` to July 2025 about 1 year ago

AI Summary: Update the `_MSVC_STL_UPDATE` macro in `yvals_core.h` to reflect a July 2025 update. This involves a simple text change in a header file, and is a good introductory task for new contributors.

Complexity: 1/5

enhancement good first issue

11.1K

MSVC's implementation of the C++ Standard Library.

C++