Build ci_module_cpp20 with MSVC

.github/workflows/windows.yml

@@ -111,3 +111,12 @@ jobs:
         run: cmake --build build --config Debug --parallel 10
       - name: Test
         run: cd build ; ctest -j 10 -C Debug --exclude-regex "test-unicode" --output-on-failure
+
+  ci_module_cpp20:
+    runs-on: windows-latest
+    steps:
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - name: Run CMake (Debug)
+        run: cmake -S . -B build -G "Visual Studio 17 2022" -DJSON_CI=ON -DCMAKE_CXX_FLAGS="/permissive- /std:c++latest /utf-8 /W4 /WX"
+      - name: Build
+        run: cmake --build build --config Debug --target ci_module_cpp20

include/nlohmann/json.hpp

@@ -39,6 +39,7 @@
 #include <nlohmann/detail/hash.hpp>
 #include <nlohmann/detail/input/binary_reader.hpp>
 #include <nlohmann/detail/input/input_adapters.hpp>
+#include <nlohmann/detail/input/json_sax.hpp>
 #include <nlohmann/detail/input/lexer.hpp>
 #include <nlohmann/detail/input/parser.hpp>
 #include <nlohmann/detail/iterators/internal_iterator.hpp>

single_include/nlohmann/json.hpp

@@ -12889,6 +12889,8 @@ NLOHMANN_JSON_NAMESPACE_END
 
 // #include <nlohmann/detail/input/input_adapters.hpp>
 
+// #include <nlohmann/detail/input/json_sax.hpp>
+
 // #include <nlohmann/detail/input/lexer.hpp>
 
 // #include <nlohmann/detail/input/parser.hpp>

tests/src/unit-msgpack.cpp

@@ -1914,10 +1914,12 @@ TEST_CASE("MessagePack with std::byte")
         SECTION("empty vector")
         {
             const std::vector<std::byte> empty_data;
-            CHECK_THROWS_WITH_AS([&]() { 
-                [[maybe_unused]] auto result = json::from_msgpack(empty_data); 
-                return true; 
-            }(),
+            CHECK_THROWS_WITH_AS([&]()
+            {
+                [[maybe_unused]] auto result = json::from_msgpack(empty_data);
+                return true;
+            }
+            (),
             "[json.exception.parse_error.110] parse error at byte 1: syntax error while parsing MessagePack value: unexpected end of input",
             json::parse_error&);
         }
@@ -1946,8 +1948,8 @@ TEST_CASE("MessagePack with std::byte")
             json direct_result = json::from_msgpack(msgpack_data);
 
             // Test the workaround approach: reinterpret as unsigned char* and use iterator range
-            const auto *const char_start = reinterpret_cast<unsigned char const*>(msgpack_data.data());
-            const auto *const char_end = char_start + msgpack_data.size();
+            const auto* const char_start = reinterpret_cast<unsigned char const*>(msgpack_data.data());
+            const auto* const char_end = char_start + msgpack_data.size();
             json workaround_result = json::from_msgpack(char_start, char_end);
 
             // Verify that the final deserialized JSON matches the original JSON