Update GCC/Clang from 14/21 to 15/22

.github/workflows/ci.yml

@@ -46,7 +46,7 @@ jobs:
       matrix:
         os:
           - name: ubuntu
-            version: 24.04
+            version: 26.04
           - name: windows
             version: 2025-vs2026
         build_type:
@@ -62,13 +62,13 @@ jobs:
         compiler:
           - name: GCC
             toolset: gcc
-            version: 14
-            executable: g++-14
+            version: 15
+            executable: g++-15
             cxxflags: -fdiagnostics-color=always
           - name: Clang
             toolset: clang
-            version: 21
-            executable: clang++-21
+            version: 22
+            executable: clang++-22
             cxxflags: -stdlib=libc++ -fcolor-diagnostics
           - name: MSVC
             toolset: msvc

README.md

@@ -1,2 +1,9 @@
 # iris
 Iris is a modern C++ library collection that provides a starting point for building various applications and libraries.
+
+### Supported Environments
+
+- C++23 and C++26
+- GCC 15
+- Clang 22
+- MSVC 2026

include/iris/colorize_format.hpp

@@ -35,6 +35,13 @@
 # define IRIS_COLORIZE_HAS_STATIC 0
 #endif
 
+// should be __cpp_lib_format >= 202603L
+// TODO: since 202603L, `runtime_format` has been renamed to
+// `dynamic_format`; our codebase needs renaming too. However
+// we lack decent compilers right now; making it practically
+// untestable.
+#define IRIS_HAS_DYNAMIC_FORMAT 0
+
 namespace iris {
 
 class colorize_error : public std::invalid_argument
@@ -905,7 +912,7 @@ struct basic_dynamic_colorized_string
 
 using dynamic_colorized_string = basic_dynamic_colorized_string<char>;
 
-#if __cpp_lib_format >= 202311L
+#if IRIS_HAS_DYNAMIC_FORMAT
 
 template<class CharT>
 struct basic_dynamic_colorized_format_string
@@ -956,8 +963,8 @@ struct basic_colorized_format_string
         scanner.scan();
     }
 
-#if __cpp_lib_format >= 202311L
-    explicit constexpr basic_colorize_format_string(detail::basic_dynamic_colorized_format_string<CharT> dynamic_str)
+#if IRIS_HAS_DYNAMIC_FORMAT
+    explicit constexpr basic_colorized_format_string(detail::basic_dynamic_colorized_format_string<CharT> dynamic_str)
         : fmt_(std::runtime_format(dynamic_str.str_))
     {
     }
@@ -1018,13 +1025,13 @@ dynamic_colorize(std::string_view str)
     return detail::basic_dynamic_colorized_string{str};
 }
 
-#if __cpp_lib_format >= 202311L
+#if IRIS_HAS_DYNAMIC_FORMAT
 
 template<int = 0>
-[[nodiscard]] constexpr detail::dynamic_colorize_format_string
+[[nodiscard]] constexpr detail::dynamic_colorized_format_string
 dynamic_colorize_format(std::string_view str)
 {
-    return detail::basic_dynamic_colorize_format_string{str};
+    return detail::basic_dynamic_colorized_format_string{str};
 }
 
 #endif
@@ -1099,7 +1106,7 @@ constexpr Out colorize_format_to(Out out, static_colorized_string<Str>, Args&&..
 template<class... Args>
 [[nodiscard]] constexpr std::string colorize_format(colorized_string_view str, Args&&... args)
 {
-#if __cpp_lib_format >= 202311L
+#if IRIS_HAS_DYNAMIC_FORMAT
     return std::format(std::runtime_format(ansi_colorize::colorize(str)), std::make_format_args(args...));
 #else
     return std::vformat(ansi_colorize::colorize(str), std::make_format_args(args...));
@@ -1109,7 +1116,7 @@ template<class... Args>
 template<class... Args>
 [[nodiscard]] constexpr std::string colorize_format(colorize_config const& cfg, std::string_view str, Args&&... args)
 {
-#if __cpp_lib_format >= 202311L
+#if IRIS_HAS_DYNAMIC_FORMAT
     return std::format(std::runtime_format(ansi_colorize::colorize(colorized_string_view{str, &cfg}, &cfg)), std::make_format_args(args...));
 #else
     return std::vformat(ansi_colorize::colorize(colorized_string_view{str, &cfg}, &cfg), std::make_format_args(args...));
@@ -1121,7 +1128,7 @@ template<class... Args>
 template<std::output_iterator<char const&> Out, class... Args>
 constexpr Out colorize_format_to(Out out, colorized_string_view str, Args&&... args)
 {
-#if __cpp_lib_format >= 202311L
+#if IRIS_HAS_DYNAMIC_FORMAT
     return std::format_to(std::move(out), std::runtime_format(ansi_colorize::colorize(str)), args...);
 #else
     return std::vformat_to(std::move(out), ansi_colorize::colorize(str), std::make_format_args(args...));
@@ -1131,7 +1138,7 @@ constexpr Out colorize_format_to(Out out, colorized_string_view str, Args&&... a
 template<std::output_iterator<char const&> Out, class... Args>
 constexpr Out colorize_format_to(Out out, colorize_config const& cfg, std::string_view str, Args&&... args)
 {
-#if __cpp_lib_format >= 202311L
+#if IRIS_HAS_DYNAMIC_FORMAT
     return std::format_to(std::move(out), std::runtime_format(ansi_colorize::colorize(colorized_string_view{str, &cfg}, &cfg)), args...);
 #else
     return std::vformat_to(std::move(out), ansi_colorize::colorize(colorized_string_view{str, &cfg}, &cfg), std::make_format_args(args...));
@@ -1166,7 +1173,7 @@ using ansi_colorize::static_colorized_string;
 
 using ansi_colorize::dynamic_colorize;
 
-#if __cpp_lib_format >= 202311L
+#if IRIS_HAS_DYNAMIC_FORMAT
 using ansi_colorize::dynamic_colorize_format;
 #endif
 

include/iris/type_traits.hpp

@@ -57,7 +57,9 @@ struct at_c;
 template<std::size_t I, class T>
 using at_c_t = at_c<I, T>::type;
 
-#if __cpp_pack_indexing >= 202311L // has native pack indexing
+// Has native pack indexing?
+// Note: GCC 15 emits "sorry, unimplemented: mangling type pack index"
+#if !(defined(__GNUC__) && !defined(__clang__) && __GNUC__ <= 15) && __cpp_pack_indexing >= 202311L
 
 # define IRIS_CORE_PACK_INDEXING(I, Ts_ellipsis) Ts_ellipsis[I]
 

test/CMakeLists.txt

@@ -40,20 +40,25 @@ endif()
 set(CATCH_CONFIG_FAST_COMPILE ON)
 set(CATCH_CONFIG_NO_USE_BUILTIN_CONSTANT_P ON)
 set(CATCH_CONFIG_DISABLE_EXCEPTIONS ON) # disable default `catch(...)` to enable debugger
+set(CATCH_CONFIG_COUNTER OFF)
 
 include(FetchContent)
 FetchContent_Declare(
     Catch2
     GIT_REPOSITORY https://github.com/catchorg/Catch2
-    GIT_TAG v3.12.0
+    GIT_TAG v3.15.3
     GIT_SHALLOW ON
 )
 FetchContent_MakeAvailable(Catch2)
 
 set_target_properties(Catch2 PROPERTIES CXX_EXTENSIONS OFF)
 set_target_properties(Catch2 Catch2WithMain PROPERTIES FOLDER "_deps")
 
-target_compile_definitions(Catch2 PUBLIC DO_NOT_USE_WMAIN)
+target_compile_definitions(
+    Catch2 PUBLIC
+    DO_NOT_USE_WMAIN
+    CATCH_CONFIG_NO_COUNTER=1
+)
 
 if(MSVC)
     target_compile_options(Catch2 PRIVATE /wd6054)