FieldIterator.opUnary

Undocumented in source. Be warned that the author may not have intended to support it.
  1. auto ref opUnary()
  2. void opUnary()
    struct FieldIterator(Field)
    scope
    @optmath
    void
    opUnary
    (
    string op
    )
    ()
    if (
    op == "++" ||
    op == "--"
    )

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