mrdocs::dyn_cast_or_null

Dynamic cast if pointer is non‐null and engaged, else nullptr (const).

Synopsis

Declared in <mrdocs/ADT/Polymorphic.hpp>

template<
    class To,
    class From>
requires ( std::derived_from<std::remove_cvref_t<To>, std::remove_cvref_t<From>> )
[[nodiscard]]
std::add_pointer_t<std::remove_reference_t<To> const>
dyn_cast_or_null(Polymorphic<From> const* pp) noexcept;

Return Value

Pointer to To when the cast succeeds, otherwise nullptr.

The return value should not be discarded.

Parameters

Name

Description

pp

A polymorphic value‐type.

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