From 344fd5a7a84a18f39d7a285dea791da2b2d023d8 Mon Sep 17 00:00:00 2001
From: Mirion <51433180+mirion-dev@users.noreply.github.com>
Date: Fri, 16 Jan 2026 00:16:13 +0800
Subject: [PATCH 1/2] add MSVC support for 20 items

---
 features_cpp20.yaml |  5 +++++
 features_cpp23.yaml | 13 ++++++++++++-
 features_cpp26.yaml |  8 +++++++-
 3 files changed, 24 insertions(+), 2 deletions(-)

diff --git a/features_cpp20.yaml b/features_cpp20.yaml
index ee6d276..8319f81 100644
--- a/features_cpp20.yaml
+++ b/features_cpp20.yaml
@@ -1705,6 +1705,7 @@ features:
       - GCC 10
       - Clang 7
       - Xcode 16.3
+      - MSVC
     ftm:
       - name: __cpp_impl_three_way_comparison
         value: 201711L
@@ -1716,6 +1717,7 @@ features:
       - GCC 11
       - Clang 19
       - Xcode 16.3
+      - MSVC 19.28
 
   - desc: "`ranges::basic_istream_view::iterator` should not be copyable"
     paper: P1638
@@ -1724,6 +1726,7 @@ features:
       - GCC 11
       - Clang 16
       - Xcode 15
+      - MSVC 19.29
 
   - desc: "Output `chrono::day`s with 'd' suffix"
     paper: P1650
@@ -1741,6 +1744,7 @@ features:
       - GCC 10
       - Clang 16
       - Xcode 15
+      - MSVC 19.29
 
   - desc: "`ranges::elements_view` needs its own sentinel"
     paper: P1994
@@ -1749,6 +1753,7 @@ features:
       - GCC 10
       - Clang 16
       - Xcode 15
+      - MSVC 19.29
 
   - desc: "`char8_t` backward compatibility remediation"
     paper: P1423
diff --git a/features_cpp23.yaml b/features_cpp23.yaml
index f51a038..b48b51f 100644
--- a/features_cpp23.yaml
+++ b/features_cpp23.yaml
@@ -65,6 +65,7 @@ features:
       - GCC
       - Clang
       - Xcode
+      - MSVC 19.50
 
   - desc: "Make declaration order layout mandated"
     paper: P1847
@@ -205,7 +206,7 @@ features:
     support:
       - GCC 13
       - Clang 15
-      - MSVC 19.50 (partial)
+      - MSVC 19.50
       - Xcode 15
     hints:
       - target: MSVC 19.50
@@ -237,6 +238,7 @@ features:
       - GCC 13
       - Clang 13
       - Xcode 26
+      - MSVC 19.50
     ftm:
       - name: __cpp_implicit_move
         value: 202207L
@@ -318,6 +320,8 @@ features:
 
   - desc: "Declarations and where to find them"
     paper: P1787
+    support:
+      - MSVC
 
   - desc: "Change scope of lambda trailing-return-type"
     paper:
@@ -327,6 +331,7 @@ features:
       - GCC 16
       - Clang 17
       - Xcode 16.3
+      - MSVC 19.50
 
   - desc: "Meaningful exports"
     paper: P2615
@@ -350,6 +355,7 @@ features:
       - GCC 12
       - Clang 14
       - Xcode 14
+      - MSVC 19.50
 
   - desc: "Allow duplicate attributes"
     paper: P2156
@@ -357,6 +363,7 @@ features:
       - GCC 11
       - Clang 13
       - Xcode 13.4.1
+      - MSVC 19.50
 
   - desc: "Adjusting the value of feature-test macro `__cpp_concepts`"
     paper: P2493
@@ -388,6 +395,7 @@ features:
       - GCC 13
       - Clang 16
       - Xcode 16
+      - MSVC 19.36
 
   - desc: "`char8_t` compatibility and portability fix"
     paper: P2513
@@ -900,6 +908,7 @@ features:
       - GCC
       - Clang
       - Xcode
+      - MSVC 19.37
 
   - desc: "De-deprecating volatile compound operations."
     paper: P2327
@@ -945,6 +954,7 @@ features:
     lib: true
     support:
       - GCC 13
+      - MSVC 19.38
 
   - desc: "`ranges::stride_view` and `views::stride()`"
     paper: P1899
@@ -1026,6 +1036,7 @@ features:
       - Clang 16 (partial)
       - Clang 17
       - Xcode 15
+      - MSVC 19.42
     hints:
       - target: Clang 16
         msg: "Specializations for string and debug_string are not done."
diff --git a/features_cpp26.yaml b/features_cpp26.yaml
index 0e505e1..a6f16e7 100644
--- a/features_cpp26.yaml
+++ b/features_cpp26.yaml
@@ -957,10 +957,14 @@ features:
   - desc: "Freestanding language: Optional `::operator new`"
     paper: P2013
     lib: true
+    support:
+      - MSVC 19.38
 
   - desc: "Freestanding `std::char_traits`, `std::errc` and facilities in: `<charconv>`, `<cstdlib>`, `<cstring>`, `<cwchar>`"
     paper: P2338
     lib: true
+    support:
+      - MSVC 19.38
     ftm:
       - name: __cpp_lib_freestanding_char_traits
         value: 202306L
@@ -977,6 +981,8 @@ features:
   - desc: "Freestanding Feature-Test Macros and Implementation-Defined Extensions"
     paper: P2198
     lib: true
+    support:
+      - MSVC 19.38
     ftm:
       - name: __cpp_lib_freestanding_feature_test_macros
         value: 202306L
@@ -1123,7 +1129,7 @@ features:
     lib: true
     support:
       - GCC 14
-      - MSVC 19.40
+      - MSVC 19.42
     ftm:
       - name: __cpp_lib_freestanding_algorithm
         value: 202311L

From 0d88abc008b2c6db81fe2c04a94058865d3bfc7f Mon Sep 17 00:00:00 2001
From: Cem Dervis <cem@dervis.de>
Date: Fri, 16 Jan 2026 16:48:07 +0100
Subject: [PATCH 2/2] Remove hint in P2290 for MSVC 19.50

---
 features_cpp23.yaml | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/features_cpp23.yaml b/features_cpp23.yaml
index b48b51f..8e27a7b 100644
--- a/features_cpp23.yaml
+++ b/features_cpp23.yaml
@@ -208,9 +208,6 @@ features:
       - Clang 15
       - MSVC 19.50
       - Xcode 15
-    hints:
-      - target: MSVC 19.50
-        msg: "Only supports octal and hexadecimal escape sequences, no universal character name escape sequences."
 
   - desc: "Named universal character escapes"
     paper: P2071