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std::range

returns a subrange of a collection

Parameters

collection

the collection to be analyzed

start

the first item to be included

end

the first item to be excluded

Result

range

the subrange

Description

The first argument specifies the collection.

The second argument specifies the first index of the first item to include in the subrange.

The third argument specifies the last index of the first item to include in the subrange.

It is okay if the subrange is empty:

first_index == last_index + 1

It is an error if the size of the subrange would be negative:

first_index > last_index + 1

If an index is negativ it is counted from the end of the collection.

So -1 denotes the last item of the collection, -2 denotes the next-to-last item and so on.

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