std::span<T,Extent>::first (3) - Linux Man Pages

std::span<T,Extent>::first: std::span<T,Extent>::first

NAME

std::span<T,Extent>::first - std::span<T,Extent>::first

Synopsis


template< std::size_t Count >
constexpr std::span<element_type, Count> first() const;
constexpr std::span<element_type, std::dynamic_extent> first( std::size_t Count ) const;


Obtains a span that is a view over the first Count elements of this span. The behavior is undefined if Count > size().

Return value


A span r that is a view over the first Count elements of *this, such that r.data() == this->data() && r.size() == Count.

See also


        obtains a subspan consisting of the last N elements of the sequence
last (public member function)
        obtains a subspan
subspan (public member function)