scalar.h

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#pragma once
 
#include <concepts>
 
namespace osc
{
    // metaclass that has a `value` member equal to `true` if its type argument
    // behaves like a scalar (which is checked when resolving overloads of matrices
    // and vectors)
    template<typename>
    struct IsScalar final {
        static constexpr bool value = false;
    };
 
    template<std::floating_point T>
    struct IsScalar<T> final {
        static constexpr bool value = true;
    };
 
    template<std::integral T>
    struct IsScalar<T> final {
        static constexpr bool value = true;
    };
 
    template<typename T>
    inline constexpr bool IsScalarV = IsScalar<T>::value;
 
    template<typename T>
    concept Scalar = IsScalarV<T>;
 
    template<typename T>
    concept ScalarOrBoolean = Scalar<T> or std::same_as<bool, T>;
}