cpp/ranges/join view/iterator/operator arith

Increments or decrements the underlying iterator.

Let and  be the underlying iterators, and  be the pointer to parent ranges, the constant  be.

@1@ Let be: Equivalent to:
 * , if ;
 * otherwise.

@2@ Equivalent to:.

@3@ Equivalent to:

@4@ Equivalent to:

@5@ Equivalent to:

Parameters
(none)

Return value
@1,4@ @2@ (none) @3,5@ a copy of that was made before the change