Merge pull request #50 from zrax/mingw-win-ci

Also update MinGW CI build to use supported Windows runner

Author: zrax

.github/workflows/ci-build.yml

@@ -77,7 +77,7 @@ jobs:
           cmake --build . --config Debug --target test
 
   build-mingw:
-    runs-on: windows-2019
+    runs-on: windows-latest
     steps:
       - uses: actions/checkout@v4
         with:
@@ -95,7 +95,8 @@ jobs:
       matrix:
         cfg:
           - { mingw: mingw32, arch: i686 }
-          - { mingw: mingw64, arch: x86_64 }
+          - { mingw: ucrt64, arch: ucrt-x86_64 }
+          - { mingw: clang64, arch: clang-x86_64 }
     steps:
       - uses: actions/checkout@v4
         with:

test/test_format.cpp

@@ -1008,10 +1008,10 @@ TEST(format, floating_point)
     EXPECT_EQ(ST_LITERAL("xx16384.00xx"), ST::format("xx{.2f}xx", 16384.0));
     EXPECT_EQ(ST_LITERAL("xx0.02xx"), ST::format("xx{.2f}xx", 0.0234));
 
-#if defined(__MINGW32__)
+#if defined(__MINGW32__) && !defined(_UCRT)
     // MSVC uses 3 digits for the exponent by default, up to VC 2013.
-    // We don't support MSVC versions older than 2015, but MinGW still
-    // uses the old format, presumably for MSVC compatibility.
+    // We don't support MSVC versions older than 2015, but MinGW still uses
+    // the old format in non-UCRT targets, presumably for MSVC compatibility.
     _set_output_format(_TWO_DIGIT_EXPONENT);
 #endif