StairsIterator.opOpAssign

Undocumented in source. Be warned that the author may not have intended to support it.
struct StairsIterator(Iterator, string direction)
scope
@optmath
void
opOpAssign
(
string op
)
(
ptrdiff_t index
)
if (
op == "-" ||
op == "+"
)
if (
direction == "+" ||
direction == "-"
)

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