NAME¶

std::ranges::take_while_view::begin - std::ranges::take_while_view::begin

Synopsis¶

constexpr auto begin() requires (!__SimpleView<V>); (1) (since C++20)
constexpr auto begin() const requires

ranges::range<const V> && (2) (since C++20)

std::indirect_unary_predicate<const Pred, ranges::iterator_t<const
V>>;

Returns an iterator to the first element of the view. Effectively calls
ranges::begin on the underlying view.

Overload (1) does not participate in overload resolution if V is a simple view (that
is, if V and const V are views with the same iterator and sentinel types).

Parameters¶

(none)

Return value¶

ranges::begin(base_), where base_ is the underlying view.

Example¶

This section is incomplete
Reason: no example

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 3450 C++20 the const overload might return an iterator constrained
non-comparable to the sentinel

See also¶

end returns a sentinel representing the end
(C++20) (public member function)
operator== compares a sentinel with an iterator returned from take_while_view::begin
(C++20) (function)