constructible_map

template<typename J, typename T>
concept constructible_map = std::ranges::range<T> &&
    std::is_convertible_v<typename T::key_type, typename J::Str> &&
    std::is_constructible_v<J, typename T::mapped_type>;

Located in the mysvac::json namespace, this concept represents key-value pair-like types that can serve as constructor arguments for JSON container type J.

If the type already satisfies the constructible concept, it can be used for implicit construction or assignment operations.
If it doesn't satisfy constructible but meets this concept, it can only be used for explicit construction and cannot be directly assigned.

When a type satisfies both this concept and constructible_array, it will be treated as a map rather than an array by default.

Version

Since v3.0.0 .