🚨 Remove GNU extension

Author: elbeno

CMakeLists.txt

@@ -206,11 +206,6 @@ target_sources(
               include/seq/impl.hpp
               include/seq/step.hpp)
 
-target_compile_options(
-    cib
-    INTERFACE
-        $<$<CXX_COMPILER_ID:Clang>:-Wno-gnu-string-literal-operator-template>)
-
 if(PROJECT_IS_TOP_LEVEL)
     add_docs(docs)
     clang_tidy_interface(cib)

include/sc/fwd.hpp

@@ -1,5 +1,8 @@
 #pragma once
 
+#include <stdx/compiler.hpp>
+#include <stdx/ct_string.hpp>
+
 #include <concepts>
 #include <type_traits>
 
@@ -30,9 +33,8 @@ template <typename T> constexpr static type_name<T> type_{};
 template <typename CharT, CharT... chars> struct string_constant;
 
 inline namespace literals {
-template <class T, T... chars>
-constexpr auto operator""_sc() -> sc::string_constant<T, chars...> {
-    return {};
+template <stdx::ct_string S> CONSTEVAL auto operator""_sc() {
+    return stdx::ct_string_to_type<S, string_constant>();
 }
 } // namespace literals
 } // namespace sc