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<code>&lt;optional&gt;</code>: address sanitizer annotation

Status: Open.

#5974 In microsoft/STL;

· AlexGuteniev opened on Dec 22, 2025

<code>&lt;regex&gt;</code>: Consider special-casing some simple loop structures

Status: Open.

#5971 In microsoft/STL;

· muellerj2 opened on Dec 21, 2025

<code>&lt;regex&gt;</code>: Avoid heap allocations for few capturing groups and stack frames

Status: Open.

#5969 In microsoft/STL;

· muellerj2 opened on Dec 19, 2025

<code>&lt;flat_map&gt;</code>: unclear resolution of LWG-3963 "Different <code>flat_(multi)map</code> specializations should be able to share same nested classes"

Status: Open.

#5965 In microsoft/STL;

· vmichal opened on Dec 18, 2025

<code>README.md</code>: Update working draft revision to N5032

documentationRelated to documentation or commentsRelated to documentation or comments

Status: Open.

#5964 In microsoft/STL;

· frederick-vs-ja opened on Dec 15, 2025

<code>&lt;regex&gt;</code>: Avoid generating no-op NFA nodes

performanceMust go fasterMust go faster

regexmeow is a substring of homeownermeow is a substring of homeowner

Status: Open.

#5962 In microsoft/STL;

· muellerj2 opened on Dec 14, 2025

<code>&lt;regex&gt;</code>: Extend some optimizations for simple loops to branchless but reentrant and branching but non-reentrant loops

performanceMust go fasterMust go faster

regexmeow is a substring of homeownermeow is a substring of homeowner

Status: Open.

#5957 In microsoft/STL;

· muellerj2 opened on Dec 11, 2025

<code>STL.natvis</code>: Need visualizers for <code>flat_multimap</code> and <code>flat_multiset</code>

flat_meowC++23 container adaptorsC++23 container adaptors

visualizerHow the VS debugger displays STL typesHow the VS debugger displays STL types

Status: Open.

#5950 In microsoft/STL;

· StephanTLavavej opened on Dec 9, 2025

<code>&lt;regex&gt;</code>: Revising the stack and complexity limits

enhancementSomething can be improvedSomething can be improved

regexmeow is a substring of homeownermeow is a substring of homeowner

Status: Open.

#5944 In microsoft/STL;

· muellerj2 opened on Dec 6, 2025

<code>&lt;complex&gt;</code>: Structured binding for <code>complex</code> is accidentally enabled before C++26, in a C++26-incompatible way

enhancementSomething can be improvedSomething can be improved

Status: Open.

#5913 In microsoft/STL;

· frederick-vs-ja opened on Nov 26, 2025

Vectorize <code>replace_copy</code> for x64 / x86

performanceMust go fasterMust go faster

Status: Open.

#5908 In microsoft/STL;

· AlexGuteniev opened on Nov 24, 2025

Possible missed optimization for non-common bidirectional ranges in <code>&lt;algorithm&gt;</code>

performanceMust go fasterMust go faster

rangesC++20/23 rangesC++20/23 ranges

Status: Open.

#5903 In microsoft/STL;

· vmichal opened on Nov 23, 2025