godbolt_helpers.hpp

struct Arg {};

// Base class for RVO checking
struct S {
    S() { puts("\t\tDefault Constructor");}
    S(Arg) { puts("\t\tValue Constructor");}
    explicit S(int) {puts("\t\tExplicit Value Constructor (1)");}
    explicit S(int, int) { puts("\t\tExplicit Value Constructor (2)");}
    ~S() { puts("\t\tDestruct");}
    S(const S&) { puts("\t\tCopy construct");}
    S(S&&) {puts("\t\tMove construct");}
    S& operator=(const S&) {puts("\t\tCopy Assign"); return *this;}
    S& operator=(S&&) {puts("\t\tMove Assign"); return *this;}
    };

pretty_print_types.hpp

#include <string_view>

template <typename T>
constexpr std::string_view 
type_name()
{
    std::string_view name, prefix, suffix;
#ifdef __clang__
    name = __PRETTY_FUNCTION__;
    prefix = "std::string_view type_name() [T = ";
    suffix = "]";
#elif defined(__GNUC__)
    name = __PRETTY_FUNCTION__;
    prefix = "constexpr std::string_view type_name() [with T = ";
    suffix = "; std::string_view = std::basic_string_view<char>]";
#elif defined(_MSC_VER)
    name = __FUNCSIG__;
    prefix = "class std::basic_string_view<char,struct std::char_traits<char> > __cdecl type_name<";
    suffix = ">(void)";
#endif
    name.remove_prefix(prefix.size());
    name.remove_suffix(suffix.size());
    return name;
}