Toolset update: MSVC Compiler 19.52.36405.1, Clang 22.1.3

.clang-format

@@ -1,7 +1,7 @@
 # Copyright (c) Microsoft Corporation.
 # SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
-# https://releases.llvm.org/20.1.0/tools/clang/docs/ClangFormatStyleOptions.html
+# https://releases.llvm.org/22.1.0/tools/clang/docs/ClangFormatStyleOptions.html
 
 # To update this .clang-format file for a new clang-format version:
 # 1. Update the documentation link above.
@@ -16,10 +16,10 @@
 ---
 # Language:        Cpp
 BasedOnStyle:  LLVM
+# AlignAfterOpenBracket: true
+AlignAfterOpenBracket: false
 # AccessModifierOffset: -2
 AccessModifierOffset: -4
-# AlignAfterOpenBracket: Align
-AlignAfterOpenBracket: DontAlign
 # AlignArrayOfStructures: None
 # AlignConsecutiveAssignments:
 #   Enabled:         false
@@ -90,6 +90,7 @@ AlignEscapedNewlines: Left
 # AlignOperands:   Align
 AlignOperands: AlignAfterOperator
 # AlignTrailingComments:
+#   AlignPPAndNotPP: true
 #   Kind:            Always
 #   OverEmptyLines:  0
 AlignTrailingComments:
@@ -98,6 +99,7 @@ AlignTrailingComments:
 # AllowAllParametersOfDeclarationOnNextLine: true
 # AllowBreakBeforeNoexceptSpecifier: Never
 AllowBreakBeforeNoexceptSpecifier: OnlyWithParen
+# AllowBreakBeforeQtProperty: false
 # AllowShortBlocksOnASingleLine: Never
 # AllowShortCaseExpressionOnASingleLine: true
 # AllowShortCaseLabelsOnASingleLine: false
@@ -114,8 +116,10 @@ AllowShortFunctionsOnASingleLine: Empty
 # AttributeMacros:
 #   - __capability
 # BinPackArguments: true
+# BinPackLongBracedList: true
 # BinPackParameters: BinPack
 # BitFieldColonSpacing: Both
+# BracedInitializerIndentWidth: -1
 # BraceWrapping:
 #   AfterCaseLabel:  false
 #   AfterClass:      false
@@ -139,13 +143,24 @@ AllowShortFunctionsOnASingleLine: Empty
 # BreakAfterAttributes: Leave
 BreakAfterAttributes: Never
 # BreakAfterJavaFieldAnnotations: false
+# BreakAfterOpenBracketBracedList: false
+# BreakAfterOpenBracketFunction: false
+# BreakAfterOpenBracketIf: false
+# BreakAfterOpenBracketLoop: false
+# BreakAfterOpenBracketSwitch: false
 # BreakAfterReturnType: None
 # BreakArrays:     true
 # BreakBeforeBinaryOperators: None
 BreakBeforeBinaryOperators: NonAssignment
+# BreakBeforeCloseBracketBracedList: false
+# BreakBeforeCloseBracketFunction: false
+# BreakBeforeCloseBracketIf: false
+# BreakBeforeCloseBracketLoop: false
+# BreakBeforeCloseBracketSwitch: false
 # BreakBeforeConceptDeclarations: Always
 # BreakBeforeBraces: Attach
 # BreakBeforeInlineASMColon: OnlyMultiline
+# BreakBeforeTemplateCloser: false
 # BreakBeforeTernaryOperators: true
 # BreakBinaryOperations: Never
 # BreakConstructorInitializers: BeforeColon
@@ -160,11 +175,12 @@ ColumnLimit:     120
 # CompactNamespaces: false
 # ConstructorInitializerIndentWidth: 4
 # ContinuationIndentWidth: 4
-# Cpp11BracedListStyle: true
+# Cpp11BracedListStyle: AlignFirstComment
 # DerivePointerAlignment: false
 # DisableFormat:   false
 # EmptyLineAfterAccessModifier: Never
 # EmptyLineBeforeAccessModifier: LogicalBlock
+# EnumTrailingComma: Leave
 # ExperimentalAutoDetectBinPacking: false
 # FixNamespaceComments: true
 # ForEachMacros:
@@ -189,6 +205,8 @@ IncludeBlocks:   Regroup
 #     SortPriority:    0
 #     CaseSensitive:   false
 IncludeCategories:
+  - Regex:           '^<benchmark/benchmark\.h>$'
+    Priority:        5
   - Regex:           '^<(yvals|yvals_core)\.h>$'
     Priority:        10
   - Regex:           '^<__msvc_.*\.hpp>$'
@@ -228,10 +246,16 @@ InsertNewlineAtEOF: true
 # InsertTrailingCommas: None
 # IntegerLiteralSeparator:
 #   Binary:          0
-#   BinaryMinDigits: 0
+#   BinaryMinDigitsInsert: 0
+#   BinaryMaxDigitsRemove: 0
 #   Decimal:         0
-#   DecimalMinDigits: 0
+#   DecimalMinDigitsInsert: 0
+#   DecimalMaxDigitsRemove: 0
 #   Hex:             0
+#   HexMinDigitsInsert: 0
+#   HexMaxDigitsRemove: 0
+#   BinaryMinDigits: 0
+#   DecimalMinDigits: 0
 #   HexMinDigits:    0
 # JavaScriptQuotes: Leave
 # JavaScriptWrapImports: true
@@ -253,11 +277,17 @@ LineEnding:      CRLF
 MaxEmptyLinesToKeep: 2
 # NamespaceIndentation: None
 NamespaceIndentation: All
+# NumericLiteralCase:
+#   ExponentLetter:  Leave
+#   HexDigit:        Leave
+#   Prefix:          Leave
+#   Suffix:          Leave
 # ObjCBinPackProtocolList: Auto
 # ObjCBlockIndentWidth: 2
 # ObjCBreakBeforeNestedBlockParam: true
 # ObjCSpaceAfterProperty: false
 # ObjCSpaceBeforeProtocolList: true
+# OneLineFormatOffRegex: ''
 # PackConstructorInitializers: BinPack
 # PenaltyBreakAssignment: 2
 # PenaltyBreakBeforeFirstCallParameter: 19
@@ -287,12 +317,16 @@ RemoveSemicolon: true
 # SeparateDefinitionBlocks: Leave
 # ShortNamespaceLines: 1
 # SkipMacroDefinitionBody: false
-# SortIncludes:    CaseSensitive
+# SortIncludes:
+#   Enabled:         true
+#   IgnoreCase:      false
+#   IgnoreExtension: false
 # SortJavaStaticImport: Before
 # SortUsingDeclarations: LexicographicNumeric
 # SpaceAfterCStyleCast: false
 SpaceAfterCStyleCast: true
 # SpaceAfterLogicalNot: false
+# SpaceAfterOperatorKeyword: false
 # SpaceAfterTemplateKeyword: true
 # SpaceAroundPointerQualifiers: Default
 # SpaceBeforeAssignmentOperators: true
@@ -308,6 +342,7 @@ SpaceAfterCStyleCast: true
 #   AfterFunctionDefinitionName: false
 #   AfterFunctionDeclarationName: false
 #   AfterIfMacros:   true
+#   AfterNot:        false
 #   AfterOverloadedOperator: false
 #   AfterPlacementOperator: true
 #   AfterRequiresInClause: false
@@ -318,7 +353,7 @@ SpaceBeforeParensOptions:
   AfterRequiresInClause: true
 # SpaceBeforeRangeBasedForLoopColon: true
 # SpaceBeforeSquareBrackets: false
-# SpaceInEmptyBlock: false
+# SpaceInEmptyBraces: Never
 # SpacesBeforeTrailingComments: 1
 # SpacesInAngles:  Never
 # SpacesInContainerLiterals: true

CMakeLists.txt

@@ -1,13 +1,13 @@
 # Copyright (c) Microsoft Corporation.
 # SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
-cmake_minimum_required(VERSION 4.2.3)
+cmake_minimum_required(VERSION 4.3.1)
 
 set(CMAKE_TRY_COMPILE_TARGET_TYPE STATIC_LIBRARY)
 project(msvc_standard_libraries LANGUAGES CXX)
 
-if(CMAKE_CXX_COMPILER_VERSION VERSION_LESS "19.52.36307.1")
-    message(FATAL_ERROR "The STL must be built with MSVC Compiler 19.52.36307.1 or later. Follow the README instructions.")
+if(CMAKE_CXX_COMPILER_VERSION VERSION_LESS "19.52.36405.1")
+    message(FATAL_ERROR "The STL must be built with MSVC Compiler 19.52.36405.1 or later. Follow the README instructions.")
 endif()
 
 include(CheckCXXSourceCompiles)

README.md

@@ -149,9 +149,9 @@ Just try to follow these rules, so we can spend more time fixing bugs and implem
     - "C++ CMake tools for Windows"
     - "MSVC AddressSanitizer"
     - "Windows 11 SDK (10.0.28000)" or later
-    - "C++ Clang tools for Windows (20.1.8 - x64/x86)"
+    - "C++ Clang tools for Windows (22.1.3 - x64/x86)"
     - *Optional, see Note 2 below:* "MSVC Build Tools for ARM64/ARM64EC (Preview)"
-* Install [Python][] 3.14.4 or later.
+* Install [Python][] 3.14.5 or later.
   + Select "Add python.exe to PATH" if you want to follow the instructions below that invoke `python`.
     Otherwise, you should be familiar with alternative methods.
 

azure-devops/config.yml

@@ -5,13 +5,13 @@
 
 variables:
 - name: x64SlowPoolName
-  value: 'Stl-2026-04-17T0531-x64-Fasv6-Pool'
+  value: 'Stl-2026-05-21T0342-x64-Fasv6-Pool'
   readonly: true
 - name: x64FastPoolName
-  value: 'Stl-2026-04-17T0531-x64-Fasv7-Pool'
+  value: 'Stl-2026-05-21T0342-x64-Fasv7-Pool'
   readonly: true
 - name: arm64PoolName
-  value: 'Stl-2026-04-17T0531-arm64-Dpsv6-Pool'
+  value: 'Stl-2026-05-21T0342-arm64-Dpsv6-Pool'
   readonly: true
 - name: poolDemands
   value: 'EnableSpotVM -equals false'

azure-devops/create-1es-hosted-pool.ps1

@@ -49,7 +49,7 @@ if ($VMSku -ieq 'Fasv6') {
   $AvailableLocations = @('eastus2', 'northeurope', 'uksouth')
 }
 
-$AvailableLocationIdx = 8 # Increment for each new set of pools, to cycle through the available locations.
+$AvailableLocationIdx = 9 # Increment for each new set of pools, to cycle through the available locations.
 $Location = $AvailableLocations[$AvailableLocationIdx % $AvailableLocations.Length]
 
 if ($Arch -ieq 'x64') {

azure-devops/provision-image.ps1

@@ -58,17 +58,17 @@ foreach ($workload in $VisualStudioWorkloads) {
 
 # https://github.com/PowerShell/PowerShell/releases/latest
 if ($Provisioning_x64) {
-  $PowerShellUrl = 'https://github.com/PowerShell/PowerShell/releases/download/v7.6.0/PowerShell-7.6.0-win-x64.msi'
+  $PowerShellUrl = 'https://github.com/PowerShell/PowerShell/releases/download/v7.6.1/PowerShell-7.6.1-win-x64.msi'
 } else {
-  $PowerShellUrl = 'https://github.com/PowerShell/PowerShell/releases/download/v7.6.0/PowerShell-7.6.0-win-arm64.msi'
+  $PowerShellUrl = 'https://github.com/PowerShell/PowerShell/releases/download/v7.6.1/PowerShell-7.6.1-win-arm64.msi'
 }
 $PowerShellArgs = @('/quiet', '/norestart')
 
 # https://www.python.org
 if ($Provisioning_x64) {
-  $PythonUrl = 'https://www.python.org/ftp/python/3.14.4/python-3.14.4-amd64.exe'
+  $PythonUrl = 'https://www.python.org/ftp/python/3.14.5/python-3.14.5-amd64.exe'
 } else {
-  $PythonUrl = 'https://www.python.org/ftp/python/3.14.4/python-3.14.4-arm64.exe'
+  $PythonUrl = 'https://www.python.org/ftp/python/3.14.5/python-3.14.5-arm64.exe'
 }
 $PythonArgs = @('/quiet', 'InstallAllUsers=1', 'PrependPath=1', 'CompileAll=1', 'Include_doc=0')
 

benchmarks/CMakeLists.txt

@@ -1,7 +1,7 @@
 # Copyright (c) Microsoft Corporation.
 # SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
-cmake_minimum_required(VERSION 4.2.3)
+cmake_minimum_required(VERSION 4.3.1)
 project(msvc_standard_libraries_benchmarks LANGUAGES CXX)
 
 if(DEFINED STL_BINARY_DIR)

benchmarks/src/adjacent_difference.cpp

@@ -1,8 +1,9 @@
 // Copyright (c) Microsoft Corporation.
 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
-#include <algorithm>
 #include <benchmark/benchmark.h>
+
+#include <algorithm>
 #include <cstddef>
 #include <cstdint>
 #include <limits>

benchmarks/src/adjacent_find.cpp

@@ -1,8 +1,9 @@
 // Copyright (c) Microsoft Corporation.
 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
-#include <algorithm>
 #include <benchmark/benchmark.h>
+
+#include <algorithm>
 #include <cstddef>
 #include <cstdint>
 #include <cstdlib>

benchmarks/src/any_swap.cpp

@@ -1,9 +1,10 @@
 // Copyright (c) Microsoft Corporation.
 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
+#include <benchmark/benchmark.h>
+
 #include <any>
 #include <array>
-#include <benchmark/benchmark.h>
 #include <type_traits>
 
 using trivial = std::array<int, 2>;

benchmarks/src/bitset_from_string.cpp

@@ -1,9 +1,10 @@
 // Copyright (c) Microsoft Corporation.
 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
+#include <benchmark/benchmark.h>
+
 #include <algorithm>
 #include <array>
-#include <benchmark/benchmark.h>
 #include <bitset>
 #include <cstddef>
 #include <random>

benchmarks/src/bitset_to_string.cpp

@@ -1,8 +1,9 @@
 // Copyright (c) Microsoft Corporation.
 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
-#include <array>
 #include <benchmark/benchmark.h>
+
+#include <array>
 #include <bit>
 #include <bitset>
 #include <climits>

benchmarks/src/charconv_floats.cpp

@@ -2,6 +2,7 @@
 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
 #include <benchmark/benchmark.h>
+
 #include <bit>
 #include <charconv>
 #include <cstddef>

benchmarks/src/efficient_nonlocking_print.cpp

@@ -5,6 +5,7 @@
 // --benchmark_out=efficient_nonlocking_print.log --benchmark_out_format=console
 
 #include <benchmark/benchmark.h>
+
 #include <cstdio>
 #include <format>
 #include <print>

benchmarks/src/filesystem.cpp

@@ -2,6 +2,7 @@
 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
 #include <benchmark/benchmark.h>
+
 #include <filesystem>
 #include <system_error>
 

benchmarks/src/fill.cpp

@@ -1,8 +1,9 @@
 // Copyright (c) Microsoft Corporation.
 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
-#include <algorithm>
 #include <benchmark/benchmark.h>
+
+#include <algorithm>
 #include <cstring>
 #include <vector>
 

benchmarks/src/find_and_count.cpp

@@ -1,8 +1,9 @@
 // Copyright (c) Microsoft Corporation.
 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
-#include <algorithm>
 #include <benchmark/benchmark.h>
+
+#include <algorithm>
 #include <cstddef>
 #include <cstdint>
 #include <cstdlib>

benchmarks/src/find_first_of.cpp

@@ -1,8 +1,9 @@
 // Copyright (c) Microsoft Corporation.
 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
-#include <algorithm>
 #include <benchmark/benchmark.h>
+
+#include <algorithm>
 #include <cstddef>
 #include <cstdint>
 #include <cstdlib>

benchmarks/src/flat_meow_assign.cpp

@@ -2,6 +2,7 @@
 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
 #include <benchmark/benchmark.h>
+
 #include <flat_map>
 #include <flat_set>
 #include <string>

benchmarks/src/has_single_bit.cpp

@@ -2,6 +2,7 @@
 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
 #include <benchmark/benchmark.h>
+
 #include <bit>
 #include <cstdint>
 

benchmarks/src/includes.cpp

@@ -1,8 +1,9 @@
 // Copyright (c) Microsoft Corporation.
 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
-#include <algorithm>
 #include <benchmark/benchmark.h>
+
+#include <algorithm>
 #include <cstddef>
 #include <cstdint>
 #include <cstdlib>