i.e. please support noecept signatures, e.g.:

struct Foo : pro::details::dispatch_prototype<void( int ) noexcept> {
    decltype( auto ) operator()( auto && self, int const x ) { return self.foo( x ); }
};

at least it does not compile for me with the current master (Clang 17 and latest MSVC)

ps. likewise - a 'bit' harder :D - support custom compiler attributes (like [[gnu::pure]])

pps. If you could also give examples/documentation on how to use the library w/o the macros and detail namespace helpers?