Concept definition

    template<typename T>
    concept streamable_pod =
    jh::pod::pod_like<T> &&
    streamable<T> &&
    !std::is_fundamental_v<T> &&
    !std::is_enum_v<T> &&
    !std::is_pointer_v<T>

Detailed Description

Debug-only constraint for POD-like types printable to std::ostream.

Combines jh::pod::pod_like with streamable, while explicitly excluding fundamental types, enums, and raw pointers.

This concept exists solely to enable the printers in the jh::pod's stringify submodule.

Note: Important: This constraint is intentionally weak and easily affected by ADL and using-introduced operator<< overloads. The exact set of printable types may change depending on the surrounding namespace context.
Because of this, it is not suitable as a production or contractual constraint. Its purpose is debugging, inspection, and logging only, where observability is preferred over strict interface guarantees.

Warning: Do not rely on this concept for serialization, persistence, ABI logic, or cross-module interface enforcement.