std::span<T,Extent>::first
From cppreference.com
template< std::size_t Count > constexpr std::span<element_type, Count> first() const; |
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constexpr std::span<element_type, std::dynamic_extent> first( std::size_t Count ) const; |
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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 (public member function) | |
obtains a subspan (public member function) |