NAME¶

std::ranges::subrange::begin - std::ranges::subrange::begin

Synopsis¶

constexpr I begin() const requires std::copyable<I>; (1) (since C++20)
[[nodiscard]] constexpr I begin() requires (!std::copyable<I>); (2) (since C++20)

Obtains the iterator to the first element of the subrange, or the end iterator if
the view is empty.

range-begin-end.svg

1) Returns a copy of the stored iterator if the iterator type is copyable.
2) Returns an iterator move-constructed from the stored iterator if the iterator
type is not copyable.

Parameters¶

(none)

Return value¶

1) An iterator copy-constructed from the stored iterator.
2) An iterator move-constructed from the stored iterator.

Notes¶

A call to (2) may leave the stored iterator in a valid but unspecified state,
depending on the behavior of the move constructor of I.

Example¶

This section is incomplete
Reason: no example

See also¶

end obtains the sentinel
(C++20) (public member function)
begin
cbegin returns an iterator to the beginning of a container or array
(C++11) (function template)
(C++14)
ranges::begin returns an iterator to the beginning of a range
(C++20) (customization point object)

Category:¶

* Todo no example