strong_type

CMake package is now ARCH_INDEPENDENT, as it should be when it's header only. Thank you @PatrickKa for submitting the fix.

Much reworked strong::range, which is now compatible with std::ranges. This was primarily sparked by a discussion with Harald Achitz. Thank you for bringing up the deficiencies.

Added several missing [[nodiscard]]

.begin() and .end() are now constexpr for strong::range types. Thanks Harald Achitz for reporting the missing specifiers.

Added .size() member to strong::range types, if the underlying type has a .size() member. Thanks Harald Achitz for the suggestion.

Added static_assert() messages explaining why a modifier cannot be used with an underlying type. Thank you @SilmaliTech for suggesting the improvement.

Added modifier invocable for types with operator(). Thank you @DNKpp for the suggestion and the draft implementation.

Fixed a bug where fmt formatter function was not const, as it must be per the documentation. Thank you Tim Blechmann for submitting the fix.

Strong types can be weakly_ordered, strongly_ordered and partially_ordered, using operator <=> in C++20 and later. Huge thanks to Björn Schäpers and Tim Blechmann for the suggestions, discussions and infinite patience.

using type = strong::type<int, struct int_>;

template <type t>
struct S {
    constexpr operator int() const { return value_of(t);}
};

int main()
{
    S<type{3}> obj;
    return obj;
}