constexpr const ranges::iterator_t<Base>& base() const & noexcept;
(1) (since C++20)
constexpr ranges::iterator_t<Base> base() &&;
(2) (since C++20)

Returns the underlying iterator.

1) Returns a reference to the underlying iterator.
2) Move constructs the result from the underlying iterator.



Return value

1) A reference to the underlying iterator.
1) An iterator move constructed from the underlying iterator.


Defect reports

The following behavior-changing defect reports were applied retroactively to previously published C++ standards.

DR Applied to Behavior as published Correct behavior
LWG 3533 C++20 the const& overload of base returns a copy of the underlying iterator returns a reference
LWG 3593 C++20 the const& overload of base might not be noexcept made noexcept

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