RetroIterator.opBinary

Undocumented in source. Be warned that the author may not have intended to support it.
  1. auto opBinary(ptrdiff_t index)
    struct RetroIterator(Iterator)
    @optmath
    opBinary
    (
    string op
    )
    (
    ptrdiff_t index
    )
    if (
    op == "+" ||
    op == "-"
    )
  2. ptrdiff_t opBinary(typeof(this) right)

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