explicit basic_result(const basic_result<R, S, P> &)
Explicit converting copy constructor from compatible
void on_result_copy_construction(T *, U &&) noexcept
this and the input.
predicate::enable_compatible_conversion<R, S, P> is true.
Complexity: Same as for the copy constructors of the underlying types. Constexpr, triviality and noexcept of underlying operations is propagated.
Guarantees: If an exception is thrown during the operation, the object is left in a partially completed state, as per the normal rules for the same operation on a