std::experimental::propagate_const::propagate_const (3) Linux Manual Page

std::experimental::propagate_const<T>::propagate_const – std::experimental::propagate_const<T>::propagate_const

Synopsis

constexpr propagate_const() = default;
(1)(library fundamentals TS v2)

    constexpr propagate_const(propagate_const &&p) = default;
(2)(library fundamentals TS v2)

    template <class U>
    (3)(library fundamentals TS v2)

    /* see below */ constexpr propagate_const(propagate_const<U> &&pu);

template <class U>
(4)(library fundamentals TS v2)

    /* see below */ constexpr propagate_const(U &&u);

propagate_const(const propagate_const &) = delete;
(5)(library fundamentals TS v2)

Let t_ designate the private data member that is the wrapped pointer-like object.
1) Constructs an propagate_const, default-initializing this->t_.
2) Explicitly defaulted move constructor that move constructs this->t_ from p.t_.
3) Initializes this->t_ as if by direct-non-list-initialization from the expression std::move(pu.t_)
This constructor does not participate in overload resolution unless std::is_constructible<T, U&&>::value is true, and is explicit if and only if std::is_convertible<U&&, T>::value is false.
4) Initializes this->t_ as if by direct-non-list-initialization with the expression std::forward<U>(u).
This constructor does not participate in overload resolution unless std::is_constructible<T, U&&>::value is true and std::decay_t<U> is not a specialization of propagate_const. This constructor is explicit if and only if std::is_convertible<U&&, T>::value is false.
5) Copy constructor is explicitly deleted.

Parameters

p – another propagate_const object to move from
pu – another propagate_const object of a different specialization to move from
u – another object to initialize the contained pointer with