Merge upstream

.gitattributes

@@ -6,7 +6,12 @@
 
 # Ensure GitHub detects our C++ code as C++ code.
 /stl/inc/** linguist-language=C++
+/stl/modules/** linguist-language=C++
 /stl/src/** linguist-language=C++
+*.h linguist-language=C++
+
+# Ensure GitHub detects lit.cfg and lit.local.cfg as Python instead of HAProxy.
+*.cfg linguist-language=Python
 
 # Ensure GitHub detects our Perl legacy test harness code as Perl code instead of Raku.
 *.pl linguist-language=Perl

.github/ISSUE_TEMPLATE/bug-report.md

@@ -1,19 +1,19 @@
 ---
 name: Bug Report
 about: Report a bug in the STL
-title: "<header>: Problem"
+title: "`<header>`: Problem"
 labels: ''
 assignees: ''
 
 ---
 
-**Describe the bug**
+# Describe the bug
 A clear and concise description of what the bug is. Please check that you've
 read the guidelines for submitting STL bug reports in `README.md`. If you are
 having problems with any component that is not the STL, instructions to get
 to the right place are there.
 
-**Command-line test case**
+# Command-line test case
 ```
 C:\Temp>type repro.cpp
 #include <iostream>
@@ -26,12 +26,18 @@ int main() {
     std::cout << "test failure\n";
 }
 
-C:\Temp>cl /EHsc /W4 /WX .\repro.cpp
-Microsoft (R) C/C++ Optimizing Compiler Version 19.23.28019.1 for x64
+C:\Temp>cl /EHsc /W4 /WX /std:c++latest .\repro.cpp
+Microsoft (R) C/C++ Optimizing Compiler Version 19.36.32522 for x64
 Copyright (C) Microsoft Corporation.  All rights reserved.
 
+/std:c++latest is provided as a preview of language features from the latest C++
+working draft, and we're eager to hear about bugs and suggestions for improvements.
+However, note that these features are provided as-is without support, and subject
+to changes or removal as the working draft evolves. See
+https://go.microsoft.com/fwlink/?linkid=2045807 for details.
+
 repro.cpp
-Microsoft (R) Incremental Linker Version 14.23.28019.1
+Microsoft (R) Incremental Linker Version 14.36.32522.0
 Copyright (C) Microsoft Corporation.  All rights reserved.
 
 /out:repro.exe
@@ -41,25 +47,39 @@ C:\Temp>.\repro.exe
 test failure
 ```
 
-**Expected behavior**
+# Expected behavior
 A clear and concise description of what you expected to happen.
 Alternatively, include `static_assert` or `assert` lines in your
 test case above whose failure clearly indicates the problem.
 
-**STL version**
-* Option 1: Visual Studio version
-  * Displayed in Help > About Microsoft Visual Studio
-  * Example:
+# STL version
+* Option 1: MSVC Compiler version
+  + Example:
+    ```
+    C:\Temp>cl.exe
+    Microsoft (R) C/C++ Optimizing Compiler Version 19.50.35503 for x64
+    Copyright (C) Microsoft Corporation.  All rights reserved.
+
+    usage: cl [ option... ] filename... [ /link linkoption... ]
     ```
-    Microsoft Visual Studio Community 2019 Preview
-    Version 16.5.0 Preview 5.0
+* Option 2: `_MSVC_STL_UPDATE` value
+  + Example:
     ```
+    C:\Temp>type meow.cpp
+    #include <iostream>
+    int main() {
+        std::cout << _MSVC_STL_UPDATE << "\n";
+    }
 
-* Option 2: git commit hash
-  * Example:
+    C:\Temp>cl /EHsc /nologo /W4 meow.cpp && meow
+    meow.cpp
+    202507
+    ```
+* Option 3: git commit hash
+  + Example:
     ```
-    https://github.com/microsoft/STL/commit/2195148
+    https://github.com/microsoft/STL/commit/219514876ea86491de191ceaa88632616bbc0f19
     ```
 
-**Additional context**
+# Additional context
 Add any other context about the problem here.

.github/ISSUE_TEMPLATE/cxx23-feature.md

@@ -21,9 +21,6 @@ and the publication of the papers. When the papers are available,
 the https://wg21.link redirector will start working.
 
 Feature-test macro:
-`#define MACRO_NAME MACRO_VALUE`
-
-Note: We're still working on finishing C++20. Until we're done
-with that (and the compiler implements distinct `/std:c++20` and
-`/std:c++latest` options), we won't be able to review PRs for
-C++23 features.
+```cpp
+#define MACRO_NAME MACRO_VALUE
+```

.github/workflows/update-status-chart.yml

@@ -0,0 +1,39 @@
+# Copyright (c) Microsoft Corporation.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+
+name: Update Status Chart
+on:
+  schedule:
+    - cron: "0 7 * * *"
+  workflow_dispatch:
+permissions:
+  contents: write
+jobs:
+  build:
+    if: ${{ github.repository == 'microsoft/STL' }}
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout gh-pages
+        uses: actions/checkout@v6
+        with:
+          ref: gh-pages
+      - name: Setup Node.js
+        uses: actions/setup-node@v6
+        with:
+          node-version: ">=25.2.1"
+      - name: Install Packages
+        run: |
+          npm ci
+      - name: Compile And Run gather_stats.mts
+        run: |
+          SECRET_GITHUB_PERSONAL_ACCESS_TOKEN="${{ github.token }}" npm run gather
+      - name: Compile And Bundle status_chart.mts
+        run: |
+          npm run make
+      - name: Commit Changes
+        run: |
+          git config user.name "github-actions[bot]"
+          git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
+          git add src/daily_table.mts src/monthly_table.mts built/status_chart.mjs
+          git diff-index --quiet HEAD || git commit -m "Automated update."
+          git push origin gh-pages

.gitignore

@@ -7,3 +7,5 @@ __pycache__/
 /build/
 /out/
 /tools/out/
+/CMakeLists.txt.user
+*.log

.gitmodules

@@ -1,10 +1,12 @@
 # Copyright (c) Microsoft Corporation.
 # SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
-[submodule "vcpkg"]
-	path = vcpkg
-	url = https://github.com/microsoft/vcpkg.git
-	fetchRecurseSubmodules = false
 [submodule "llvm-project"]
 	path = llvm-project
 	url = https://github.com/llvm/llvm-project.git
+[submodule "boost-math"]
+	path = boost-math
+	url = https://github.com/boostorg/math.git
+[submodule "benchmarks/google-benchmark"]
+	path = benchmarks/google-benchmark
+	url = https://github.com/google/benchmark.git

.mailmap

@@ -0,0 +1,11 @@
+# Copyright (c) Microsoft Corporation.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+
+# This file maps author and committer email addresses to canonical names and email
+# addresses for display in the output of `git log` and `git blame`.
+# Format:
+# Canonical Name <canonical@example.com> <commit@example.com>
+
+
+Amy Wishnousky <amyw@microsoft.com> <stwish@microsoft.com>
+Anju del Moral Gonzalez <delMoralGonzalez.Anju@microsoft.com> <judelmor@microsoft.com>

.vscode/settings.json

@@ -2,19 +2,37 @@
 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 {
     "C_Cpp.autoAddFileAssociations": false,
-    "editor.formatOnSave": true,
+    "editor.formatOnSave": false,
+    "[cpp]": {
+        "editor.formatOnSave": true
+    },
     "files.associations": {
         ".clang-format": "yaml",
         "header-units.json": "jsonc",
         "**/stl/inc/**": "cpp"
     },
     "files.eol": "\r\n",
     "files.exclude": {
+        "benchmarks/google-benchmark": true,
+        "boost-math": true,
         "llvm-project": true,
-        "stl/msbuild": true,
-        "vcpkg": true
+        "stl/msbuild": true
     },
     "files.insertFinalNewline": true,
     "files.trimFinalNewlines": true,
-    "files.trimTrailingWhitespace": true
+    "files.trimTrailingWhitespace": true,
+    "git.ignoredRepositories": [
+        "benchmarks/google-benchmark",
+        "boost-math",
+        "llvm-project"
+    ],
+    "python.analysis.extraPaths": [
+        "./llvm-project/libcxx/utils",
+        "./llvm-project/llvm/utils/lit",
+        "./tests/utils"
+    ],
+    "search.exclude": {
+        "stl/src/xcharconv_ryu_tables.cpp": true,
+        "tests/std/tests/P0067R5_charconv/*test_cases*.hpp": true
+    }
 }