BitMask.opBinary

Undocumented in source. Be warned that the author may not have intended to support it.
  1. BitMask opBinary(BitMask rhs)
  2. BitMask opBinary(Index index)
    struct BitMask
    const pure nothrow
    opBinary
    (
    string op
    Index
    )
    (
    const Index index
    )
    if (
    (
    op == "-" ||
    op == "+"
    )
    &&
    isIntegral!Index
    )

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