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

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< cpp‎ | ranges‎ | subrange
 
 
 
std::ranges::subrange
Member functions
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subrange::begin
(C++20)
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(C++20)
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(C++20)
 
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.

Contents

[edit] Parameters

(none)

[edit] Return value

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

[edit] 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.

[edit] Example

[edit] See also

(C++20)
obtains the sentinel
(public member function) [edit]
(C++11)(C++14)
returns an iterator to the beginning of a container or array
(function template) [edit]
returns an iterator to the beginning of a range
(customization point object) [edit]