A helper that enables an input view to temporarily cache values as it is iterated over. More...

Inheritance diagram for seqan3::detail::non_propagating_cache< T >:

Public Member Functions
template<class I > requires requires (I const & i) { T(*i); }
constexpr T &	emplace_deref (I const &i)
	Destroys current value, initializes with new value obtained from dereferencing `i`, and returns value.

constexpr	non_propagating_cache (non_propagating_cache &&other) noexcept
	Move constructor is a no-op for `this` and destroys value of `other`.

constexpr	non_propagating_cache (non_propagating_cache const &) noexcept
	Copy construction is a no-op.

constexpr non_propagating_cache &	operator= (non_propagating_cache &&other) noexcept
	Move assignment destroys values of both `this` and `other`.

constexpr non_propagating_cache &	operator= (non_propagating_cache const &other) noexcept
	Copy assignment is a no-op if `this` == `other`, otherwise destroys value of `this`.

Public Member Functions inherited from std::optional< T >
T	emplace (T... args)

T	has_value (T... args)

T	operator bool (T... args)

T	operator* (T... args)

T	operator-> (T... args)

T	operator= (T... args)

T	optional (T... args)

T	reset (T... args)

T	swap (T... args)

T	value (T... args)

T	value_or (T... args)

T	~optional (T... args)

Detailed Description

template<typename T>
requires std::is_object_v<T>
class seqan3::detail::non_propagating_cache< T >

A helper that enables an input view to temporarily cache values as it is iterated over.

Behaves like std::optional, but

Constrains its type parameter T with std::is_object_v<T>.
Copy constructor is a no-op.
Move constructor is a no-op for this and destroys value of other.
Copy assignment is a no-op if this == other, otherwise destroys value of this.
Move assignment destroys both objects.
Has an additional emplace_deref member function.

The documentation for this class was generated from the following file:

Public Member Functions