microsoft · StephanTLavavej · Mar 4, 2021 · Mar 3, 2021 · Mar 3, 2021 · Mar 3, 2021
@@ -7,6 +7,10 @@
 # Ensure GitHub detects our C++ code as C++ code.
 /stl/inc/** 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
@@ -11,7 +11,7 @@ project(msvc_standard_libraries LANGUAGES CXX)
 
 find_package(Boost REQUIRED)
 
-set(VCLIBS_MIN_BOOST_VERSION 1.74.0)
+set(VCLIBS_MIN_BOOST_VERSION 1.75.0)
 if("${Boost_VERSION}" VERSION_LESS "${VCLIBS_MIN_BOOST_VERSION}")
     message(FATAL_ERROR "Detected Boost version is too old (older than ${VCLIBS_MIN_BOOST_VERSION}).")
 endif()

@@ -143,7 +143,7 @@ Just try to follow these rules, so we can spend more time fixing bugs and implem
 The STL uses boost-math headers to provide P0226R1 Mathematical Special Functions. We recommend using [vcpkg][] to
 acquire this dependency.
 
-1. Install Visual Studio 2019 16.9 Preview 4 or later.
+1. Install Visual Studio 2019 16.10 Preview 1 or later.
     * We recommend selecting "C++ CMake tools for Windows" in the VS Installer.
     This will ensure that you're using supported versions of CMake and Ninja.
     * Otherwise, install [CMake][] 3.19 or later, and [Ninja][] 1.10.2 or later.
@@ -158,7 +158,7 @@ acquire this dependency.
 
 # How To Build With A Native Tools Command Prompt
 
-1. Install Visual Studio 2019 16.9 Preview 4 or later.
+1. Install Visual Studio 2019 16.10 Preview 1 or later.
     * We recommend selecting "C++ CMake tools for Windows" in the VS Installer.
     This will ensure that you're using supported versions of CMake and Ninja.
     * Otherwise, install [CMake][] 3.19 or later, and [Ninja][] 1.10.2 or later.
@@ -234,7 +234,7 @@ C:\Users\username\Desktop>dumpbin /IMPORTS .\example.exe | findstr msvcp
 # How To Run The Tests With A Native Tools Command Prompt
 
 1. Follow either [How To Build With A Native Tools Command Prompt][] or [How To Build With The Visual Studio IDE][].
-2. Acquire [Python][] 3.9.1 or newer and have it on the `PATH` (or run it directly using its absolute or relative path).
+2. Acquire [Python][] 3.9.2 or newer and have it on the `PATH` (or run it directly using its absolute or relative path).
 3. Have LLVM's `bin` directory on the `PATH` (so `clang-cl.exe` is available).
     * We recommend selecting "C++ Clang tools for Windows" in the VS Installer. This will automatically add LLVM to the
     `PATH` of the x86 and x64 Native Tools Command Prompts, and will ensure that you're using a supported version.

@@ -20,9 +20,9 @@ $ErrorActionPreference = 'Stop'
 # https://aka.ms/azps-changewarnings
 $Env:SuppressAzurePowerShellBreakingChangeWarnings = 'true'
 
-$Location = 'northeurope'
+$Location = 'westus2'
 $Prefix = 'StlBuild-' + (Get-Date -Format 'yyyy-MM-dd')
-$VMSize = 'Standard_D32as_v4'
+$VMSize = 'Standard_D32ds_v4'
 $ProtoVMName = 'PROTOTYPE'
 $LiveVMPrefix = 'BUILD'
 $WindowsServerSku = '2019-Datacenter'

@@ -91,7 +91,7 @@ if ([string]::IsNullOrEmpty($AdminUserPassword)) {
   $PsExecPath = Join-Path $ExtractedPsToolsPath 'PsExec64.exe'
 
   # https://github.com/PowerShell/PowerShell/releases/latest
-  $PowerShellZipUrl = 'https://github.com/PowerShell/PowerShell/releases/download/v7.1.1/PowerShell-7.1.1-win-x64.zip'
+  $PowerShellZipUrl = 'https://github.com/PowerShell/PowerShell/releases/download/v7.1.2/PowerShell-7.1.2-win-x64.zip'
   Write-Host "Downloading: $PowerShellZipUrl"
   $ExtractedPowerShellPath = DownloadAndExtractZip -Url $PowerShellZipUrl
   $PwshPath = Join-Path $ExtractedPowerShellPath 'pwsh.exe'
@@ -139,7 +139,7 @@ $Workloads = @(
 $ReleaseInPath = 'Preview'
 $Sku = 'Enterprise'
 $VisualStudioBootstrapperUrl = 'https://aka.ms/vs/16/pre/vs_enterprise.exe'
-$PythonUrl = 'https://www.python.org/ftp/python/3.9.1/python-3.9.1-amd64.exe'
+$PythonUrl = 'https://www.python.org/ftp/python/3.9.2/python-3.9.2-amd64.exe'
 
 # https://docs.microsoft.com/en-us/windows-hardware/drivers/download-the-wdk
 $WindowsDriverKitUrl = 'https://go.microsoft.com/fwlink/?linkid=2128854'

@@ -8,7 +8,7 @@ variables:
   buildOutputLocation: 'D:\build'
   vcpkgLocation: '$(Build.SourcesDirectory)/vcpkg'
 
-pool: 'StlBuild-2021-02-17'
+pool: 'StlBuild-2021-03-02'
 
 stages:
   - stage: Code_Format

@@ -1809,57 +1809,28 @@ inline constexpr bool is_nothrow_invocable_r_v =
 #ifndef __clang__ // TRANSITION, LLVM-48860
 // STRUCT TEMPLATE is_layout_compatible
 template <class _Ty1, class _Ty2>
-#ifdef _IS_LAYOUT_COMPATIBLE_SUPPORTED
-struct is_layout_compatible : bool_constant<__is_layout_compatible(_Ty1, _Ty2)> {
-#else // ^^^ _IS_LAYOUT_COMPATIBLE_SUPPORTED / !_IS_LAYOUT_COMPATIBLE_SUPPORTED vvv
-struct is_layout_compatible : bool_constant<__builtin_is_layout_compatible(_Ty1, _Ty2)> {
-#endif // _IS_LAYOUT_COMPATIBLE_SUPPORTED
-};
+struct is_layout_compatible : bool_constant<__is_layout_compatible(_Ty1, _Ty2)> {};
 
 template <class _Ty1, class _Ty2>
-#ifdef _IS_LAYOUT_COMPATIBLE_SUPPORTED
 inline constexpr bool is_layout_compatible_v = __is_layout_compatible(_Ty1, _Ty2);
-#else // ^^^ _IS_LAYOUT_COMPATIBLE_SUPPORTED / !_IS_LAYOUT_COMPATIBLE_SUPPORTED vvv
-inline constexpr bool is_layout_compatible_v = __builtin_is_layout_compatible(_Ty1, _Ty2);
-#endif // _IS_LAYOUT_COMPATIBLE_SUPPORTED
 
 // STRUCT TEMPLATE is_pointer_interconvertible_base_of
 template <class _Base, class _Derived>
-struct is_pointer_interconvertible_base_of
-#ifdef _IS_LAYOUT_COMPATIBLE_SUPPORTED
-    : bool_constant<__is_pointer_interconvertible_base_of(_Base, _Derived)> {
-};
-#else // ^^^ _IS_LAYOUT_COMPATIBLE_SUPPORTED / !_IS_LAYOUT_COMPATIBLE_SUPPORTED vvv
-    : bool_constant<__builtin_is_pointer_interconvertible_base_of(_Base, _Derived)> {
-};
-#endif // _IS_LAYOUT_COMPATIBLE_SUPPORTED
+struct is_pointer_interconvertible_base_of : bool_constant<__is_pointer_interconvertible_base_of(_Base, _Derived)> {};
 
 template <class _Base, class _Derived>
-#ifdef _IS_LAYOUT_COMPATIBLE_SUPPORTED
 inline constexpr bool is_pointer_interconvertible_base_of_v = __is_pointer_interconvertible_base_of(_Base, _Derived);
-#else // ^^^ _IS_LAYOUT_COMPATIBLE_SUPPORTED / !_IS_LAYOUT_COMPATIBLE_SUPPORTED vvv
-inline constexpr bool is_pointer_interconvertible_base_of_v = __builtin_is_pointer_interconvertible_base_of(
-    _Base, _Derived);
-#endif // _IS_LAYOUT_COMPATIBLE_SUPPORTED
 
 // FUNCTION TEMPLATE is_pointer_interconvertible_with_class
 template <class _ClassTy, class _MemberTy>
 _NODISCARD constexpr bool is_pointer_interconvertible_with_class(_MemberTy _ClassTy::*_Pm) noexcept {
-#ifdef _IS_LAYOUT_COMPATIBLE_SUPPORTED
     return __is_pointer_interconvertible_with_class(_ClassTy, _Pm);
-#else // ^^^ _IS_LAYOUT_COMPATIBLE_SUPPORTED / !_IS_LAYOUT_COMPATIBLE_SUPPORTED vvv
-    return __builtin_is_pointer_interconvertible_with_class(_ClassTy, _Pm);
-#endif // _IS_LAYOUT_COMPATIBLE_SUPPORTED
 }
 
 // FUNCTION TEMPLATE is_corresponding_member
 template <class _ClassTy1, class _ClassTy2, class _MemberTy1, class _MemberTy2>
 _NODISCARD constexpr bool is_corresponding_member(_MemberTy1 _ClassTy1::*_Pm1, _MemberTy2 _ClassTy2::*_Pm2) noexcept {
-#ifdef _IS_LAYOUT_COMPATIBLE_SUPPORTED
     return __is_corresponding_member(_ClassTy1, _ClassTy2, _Pm1, _Pm2);
-#else // ^^^ _IS_LAYOUT_COMPATIBLE_SUPPORTED / !_IS_LAYOUT_COMPATIBLE_SUPPORTED vvv
-    return __builtin_is_corresponding_member(_ClassTy1, _ClassTy2, _Pm1, _Pm2);
-#endif // _IS_LAYOUT_COMPATIBLE_SUPPORTED
 }
 #endif // __clang__
 #endif // __EDG__

@@ -31,9 +31,6 @@ _STL_DISABLE_CLANG_WARNINGS
 #ifdef _M_CEE_PURE
 #define _YIELD_PROCESSOR()
 #else // ^^^ _M_CEE_PURE / !_M_CEE_PURE vvv
-#if 1 // TRANSITION, VS 2019 16.10
-extern "C" void _mm_pause(void);
-#endif // TRANSITION, VS 2019 16.10
 #define _YIELD_PROCESSOR() _mm_pause()
 #endif // ^^^ !_M_CEE_PURE ^^^
 

@@ -531,8 +531,8 @@
 #error STL1000: Unexpected compiler version, expected Clang 11.0.0 or newer.
 #endif // ^^^ old Clang ^^^
 #elif defined(_MSC_VER)
-#if _MSC_VER < 1928 // Coarse-grained, not inspecting _MSC_FULL_VER
-#error STL1001: Unexpected compiler version, expected MSVC 19.28 or newer.
+#if _MSC_VER < 1929 // Coarse-grained, not inspecting _MSC_FULL_VER
+#error STL1001: Unexpected compiler version, expected MSVC 19.29 or newer.
 #endif // ^^^ old MSVC ^^^
 #else // vvv other compilers vvv
 // not attempting to detect other compilers

@@ -57,6 +57,7 @@ SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
             $(CrtRoot)\github\stl\src\cthread.cpp;
             $(CrtRoot)\github\stl\src\mutex.cpp;
             $(CrtRoot)\github\stl\src\pplerror.cpp;
+            $(CrtRoot)\github\stl\src\ppltasks.cpp;
             $(CrtRoot)\github\stl\src\taskscheduler.cpp;
             $(CrtRoot)\github\stl\src\xnotify.cpp;
             $(CrtRoot)\github\stl\src\xtime.cpp;
@@ -148,14 +149,6 @@ SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
             <BuildAs>nativecpp</BuildAs>
         </BuildFiles>
 
-        <BuildFiles Include="
-            $(CrtRoot)\github\stl\src\ppltasks.cpp;
-            ">
-            <BuildAs>nativecpp</BuildAs>
-            <!-- ppltasks.cpp uses WRL, which is incompatible with /permissive- as of May 24, 2019 -->
-            <NeedsPermissiveMode>true</NeedsPermissiveMode>
-        </BuildFiles>
-
         <BuildFiles Include="
             $(CrtRoot)\github\stl\src\winapisupp.cpp;
             ">

@@ -358,14 +358,6 @@ std/utilities/meta/meta.unary/meta.unary.prop/is_constructible.pass.cpp:0 FAIL
 std/containers/views/span.cons/ptr_len.pass.cpp:0 FAIL
 std/containers/views/span.cons/ptr_ptr.pass.cpp:0 FAIL
 
-# DevCom-1336816 "cl errors on constexpr array of std::string"
-std/numerics/numeric.ops/adjacent.difference/adjacent_difference_op.pass.cpp:0 FAIL
-std/numerics/numeric.ops/partial.sum/partial_sum_op.pass.cpp:0 FAIL
-
-# DevCom-1336819 "cl constexpr temporary passing issue"
-std/numerics/numeric.ops/inner.product/inner_product_comp.pass.cpp:0 FAIL
-std/numerics/numeric.ops/accumulate/accumulate_op.pass.cpp:0 FAIL
-
 # VSO-1168723 "Implicit copy assignment incorrectly not constexpr when subobject has explicit constexpr copy constructor"
 std/utilities/utility/pairs/pairs.pair/assign_pair.pass.cpp:0 FAIL
 std/utilities/utility/pairs/pairs.pair/assign_rv_pair.pass.cpp:0 FAIL
@@ -375,16 +367,6 @@ std/utilities/utility/pairs/pairs.pair/assign_rv_pair_U_V.pass.cpp:0 FAIL
 std/algorithms/alg.sorting/alg.sort/partial.sort/partial_sort.pass.cpp:0 FAIL
 std/algorithms/alg.sorting/alg.sort/partial.sort/partial_sort_comp.pass.cpp:0 FAIL
 
-# VSO-1275530 "[constexpr] Temporaries created for functions do not have a ctor called (and have a redundant dtor)."
-std/numerics/numeric.ops/exclusive.scan/exclusive_scan.pass.cpp:0 FAIL
-std/numerics/numeric.ops/exclusive.scan/exclusive_scan_init_op.pass.cpp:0 FAIL
-std/numerics/numeric.ops/inclusive.scan/inclusive_scan.pass.cpp:0 FAIL
-std/numerics/numeric.ops/inclusive.scan/inclusive_scan_op.pass.cpp:0 FAIL
-std/numerics/numeric.ops/inclusive.scan/inclusive_scan_op_init.pass.cpp:0 FAIL
-std/numerics/numeric.ops/transform.exclusive.scan/transform_exclusive_scan_init_bop_uop.pass.cpp:0 FAIL
-std/numerics/numeric.ops/transform.inclusive.scan/transform_inclusive_scan_bop_uop.pass.cpp:0 FAIL
-std/numerics/numeric.ops/transform.inclusive.scan/transform_inclusive_scan_bop_uop_init.pass.cpp:0 FAIL
-
 
 # *** CLANG COMPILER BUGS ***
 # LLVM-33230 "Clang on Windows should define __STDCPP_THREADS__ to be 1"

@@ -358,14 +358,6 @@ utilities\meta\meta.unary\meta.unary.prop\is_constructible.pass.cpp
 containers\views\span.cons\ptr_len.pass.cpp
 containers\views\span.cons\ptr_ptr.pass.cpp
 
-# DevCom-1336816 "cl errors on constexpr array of std::string"
-numerics\numeric.ops\adjacent.difference\adjacent_difference_op.pass.cpp
-numerics\numeric.ops\partial.sum\partial_sum_op.pass.cpp
-
-# DevCom-1336819 "cl constexpr temporary passing issue"
-numerics\numeric.ops\inner.product\inner_product_comp.pass.cpp
-numerics\numeric.ops\accumulate\accumulate_op.pass.cpp
-
 # VSO-1168723 "Implicit copy assignment incorrectly not constexpr when subobject has explicit constexpr copy constructor"
 utilities\utility\pairs\pairs.pair\assign_pair.pass.cpp
 utilities\utility\pairs\pairs.pair\assign_rv_pair.pass.cpp
@@ -375,16 +367,6 @@ utilities\utility\pairs\pairs.pair\assign_rv_pair_U_V.pass.cpp
 algorithms\alg.sorting\alg.sort\partial.sort\partial_sort.pass.cpp
 algorithms\alg.sorting\alg.sort\partial.sort\partial_sort_comp.pass.cpp
 
-# VSO-1275530 "[constexpr] Temporaries created for functions do not have a ctor called (and have a redundant dtor)."
-numerics\numeric.ops\exclusive.scan\exclusive_scan.pass.cpp
-numerics\numeric.ops\exclusive.scan\exclusive_scan_init_op.pass.cpp
-numerics\numeric.ops\inclusive.scan\inclusive_scan.pass.cpp
-numerics\numeric.ops\inclusive.scan\inclusive_scan_op.pass.cpp
-numerics\numeric.ops\inclusive.scan\inclusive_scan_op_init.pass.cpp
-numerics\numeric.ops\transform.exclusive.scan\transform_exclusive_scan_init_bop_uop.pass.cpp
-numerics\numeric.ops\transform.inclusive.scan\transform_inclusive_scan_bop_uop.pass.cpp
-numerics\numeric.ops\transform.inclusive.scan\transform_inclusive_scan_bop_uop_init.pass.cpp
-
 
 # *** CLANG COMPILER BUGS ***
 # LLVM-33230 "Clang on Windows should define __STDCPP_THREADS__ to be 1"

@@ -496,15 +496,15 @@ void test_990695() {
         }
 
         {
-            // Should fail if EOF while not parsing specifier (N4878 [locale.time.get.members]/8.4).
+            // Should fail if EOF while not parsing specifier (N4878 [locale.time.get.members]/8.3).
             tm t{};
             istringstream iss("4");
             iss >> get_time(&t, "42");
             assert(iss.rdstate() == (ios_base::eofbit | ios_base::failbit));
         }
 
         {
-            // Trailing % should not be treated as a literal (N4878 [locale.time.get.members]/8.4 again).
+            // Trailing % should not be treated as a literal (N4878 [locale.time.get.members]/8.4).
             tm t{};
             istringstream iss("%");
             iss >> get_time(&t, "%");
@@ -520,7 +520,7 @@ void test_990695() {
         }
 
         {
-            // Literal match is case-insensitive.
+            // Literal match is case-insensitive (N4878 [locale.time.get.members]/8.6).
             tm t{};
             istringstream iss("aBc");
             iss >> get_time(&t, "AbC");

@@ -3908,9 +3908,7 @@ void run_interactive_tests(int argc, wchar_t* argv[]) {
 // mode.
 void test_devcom_953628() { // COMPILE-ONLY
     struct S : wstring {};
-#if defined(MSVC_INTERNAL_TESTING) || defined(__clang__) || defined(__EDG__) // TRANSITION, VSO-1270432
     path{S{}};
-#endif // defined(MSVC_INTERNAL_TESTING) || defined(__clang__) || defined(__EDG__)
 }
 
 int wmain(int argc, wchar_t* argv[]) {
@@ -3926,7 +3924,7 @@ int wmain(int argc, wchar_t* argv[]) {
 
     if (argc > 1) {
         run_interactive_tests(argc, argv);
-        return 0; // not a PM_ constant because the caller isn't run.pl here
+        return 0;
     }
 
     for (const auto& testCase : decompTestCases) {

@@ -127,7 +127,7 @@ _CONSTEXPR20_DYNALLOC bool test() {
     }
 #endif // __cpp_lib_concepts
 
-#if defined(__cpp_constexpr_dynamic_alloc) && (defined(__clang__) || defined(__EDG__)) // TRANSITION, DevCom-1333853
+#if defined(__cpp_constexpr_dynamic_alloc)
     { // _Uninitialized_move_unchecked
         int_wrapper_move input[] = {1, 2, 3, 4};
         int_wrapper_move output[4];
@@ -140,7 +140,7 @@ _CONSTEXPR20_DYNALLOC bool test() {
             assert(equal(begin(input), end(input), begin(expected_after_move), end(expected_after_move)));
         }
     }
-#endif // defined(__cpp_constexpr_dynamic_alloc) && (defined(__clang__) || defined(__EDG__))
+#endif // defined(__cpp_constexpr_dynamic_alloc)
     return true;
 }