update to support clang21 and libfmt12 support

Author: arBmind

co-cpp19.qbs

@@ -32,7 +32,7 @@ Project {
 
         Export {
             Depends { name: "cpp" }
-            cpp.cxxLanguageVersion: "c++2a"
+            cpp.cxxLanguageVersion: "c++23"
             cpp.treatWarningsAsErrors: true
 
             Properties {

src/coro19.lib/coro19/coroutine.cpp

@@ -1,7 +1,7 @@
 
 
 // requires C++ 17 __has_include
-#if __has_include(<yvals_core.h>)
+#if defined(_MSC_VER) && __has_include(<yvals_core.h>)
 #    include <yvals_core.h>
 #endif
 #if __has_include(<version>)

src/coro19.lib/coro19/coroutine.h

@@ -16,7 +16,7 @@
 #pragma once
 
 // requires C++ 17 __has_include
-#if __has_include(<yvals_core.h>)
+#if defined(_MSC_VER) && __has_include(<yvals_core.h>)
 #    include <yvals_core.h>
 #endif
 #if __has_include(<version>)
@@ -300,8 +300,7 @@ template<typename _PromiseT> struct hash<coroutine_handle<_PromiseT>> {
     using result_type = size_t;
 
     [[nodiscard]] //
-    result_type
-        operator()(argument_type const& _Handle) const noexcept {
+    result_type operator()(argument_type const& _Handle) const noexcept {
         return hash<void*>()(_Handle.address());
     }
 };

src/signal19.lib/signal19/SignalWith.h

@@ -88,9 +88,8 @@ template<class... Args> struct SignalWith final : details::Signal {
 
     /// Type Erasure for CallbackCancellation
     struct StoredCancellation {
-        using Storage =
-            std::aligned_storage_t<sizeof(SignalCancellation) + 2 * sizeof(void*), alignof(SignalCancellation)>;
-        Storage storage; // fixed size storage
+        using Storage = uint8_t[sizeof(SignalCancellation) + 2 * sizeof(void*)];
+        alignas(SignalCancellation) Storage storage; // fixed size storage
 
         template<class Cb> explicit StoredCancellation(SignalWith& signal, Cb&& cb) {
             using Clean = std::remove_const_t<std::remove_reference_t<Cb>>;

src/tuple19.lib/tuple19/Tuple.fmt.h

@@ -8,10 +8,10 @@ namespace tuple19 {
 
 /// use values of the tuple as format arguments
 /// note: you still have to craft the proper format string!
-/// usage: vformat(formatStr, tuple19::make_format_args(argsTuple));
-template<class... Ts> constexpr auto make_format_args(Tuple<Ts...> const& args) {
+/// usage: vformat(formatStr, tuple19::vargs(argsTuple));
+template<class... Ts> constexpr auto vargs(Tuple<Ts...> const& args) {
     return [&]<size_t... Is>(std::index_sequence<Is...> const&) {
-        return fmt::make_format_args(args.template at<Is>()...);
+        return fmt::vargs<Ts...>{{args.template at<Is>()...}};
     }(std::make_index_sequence<sizeof...(Ts)>{});
 }