std::ranges::subrange<I,S,K>:: begin

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Ranges library
Range adaptors
constexpr I begin ( ) const requires std:: copyable < I > ;
(1) (since C++20)
constexpr I begin ( ) requires ( ! std:: copyable < I > ) ;
(2) (since C++20)

Obtains the iterator to the beginning of the subrange .

range-begin-end.svg

Return value

2) std :: move ( begin_  ) .

Example

See also

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