indexed_span¶

template<typename Value, typename Indexer> class indexed_span¶: Span-like class which allows accessing elements through a custom indexer. indexed_span does not own the data, and its size is always known at compile time (it always cover the full Indexer range). It is multidimensional if the Indexer is. It is related to std::span<T, std::static_extent> and has a similar interface.

The primary use case for indexed_span is that it is the type returned by a multidimensional indexed_array when accessing a lower-rank dimension via the slice() method.

Construction and destruction¶

Constructors
`indexed_span() = delete`	default constructor is deleted
indexed_span(indexed_span const&) operator=(indexed_span const&)	copy/move operators defaulted
indexed_span(Value*)	constructor from a `Value*`

Member functions¶

Data access¶

Functions always present
indexed_span::at(index) const	Element access (range-checked)
indexed_span::operator[](index) const	Element access (unchecked)
indexed_span::data() const	Access to raw storage
indexed_span::front() const	Access to first element
indexed_span::back() const	Access to last element
Multidimensional specific
indexed_span::slice(1d-index) const indexed_span::slice_at(1d-index) const	Access to subrank

Observers¶

indexed_span::empty() const	Checks sequence for emptiness
indexed_span::size() const	Returns the size of the sequence

Iteration¶

indexed_span::begin() indexed_span::cbegin()	Iterator to start of sequence
indexed_span::end() indexed_span::cend()	Iterator past the end of the sequence
indexed_span::rbegin() indexed_span::crbegin()	Iterator to start of reverse sequence
indexed_span::rend() indexed_span::crend()	Iterator past the end of the reverse sequence

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Indexed_array observers

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indexed_span constructors