proc flipSign(intObj: var IntObject) {....raises: [], tags: [], forbids: [].}

proc isEven(i: IntObject): bool {....raises: [], tags: [], forbids: [].}

proc isNegative(intObj: IntObject): bool {.inline, ...raises: [], tags: [],
    forbids: [].}

proc isOdd(i: IntObject): bool {....raises: [], tags: [], forbids: [].}

proc isPositive(intObj: IntObject): bool {.inline, ...raises: [], tags: [],
    forbids: [].}

proc isZero(intObj: IntObject): bool {.inline, ...raises: [], tags: [], forbids: [].}

proc negate(self: var IntObject) {.inline, ...raises: [], tags: [], forbids: [].}

proc setSignNegative(self: var IntObject) {.inline, ...raises: [], tags: [],
    forbids: [].}