proc addEachIter(loopBody: NimNode; nIt: int; itors, res: NimNode;
                 preBreakCb: PreBreakCb = noopPreBreakCb) {....raises: [Exception],
    tags: [RootEffect], forbids: [].}

proc addLoopEach(loopBody: NimNode; parent: NimNode;
                 iterables: NimNode | seq[NimNode];
                 res = ident preferredGenIterResName;
                 preBreakCb: PreBreakCb = noopPreBreakCb): NimNode {.discardable.}

proc addResDecl(body: NimNode; iterables: NimNode | seq[NimNode];
                res = ident preferredGenIterResName;
                iters = genSym(nskLet, "iters")): NimNode {.discardable.}

proc addYield(res, dest: NimNode) {....raises: [], tags: [], forbids: [].}

func newLoop(body: NimNode): NimNode {....raises: [], tags: [], forbids: [].}

proc newNullaryLambdaIter(body: NimNode; resType = ident"auto"): NimNode {.
    ...raises: [], tags: [], forbids: [].}

func newTuple(): NimNode {....raises: [], tags: [], forbids: [].}

func noInitVarDecl(name, Type: NimNode): NimNode {....raises: [], tags: [],
    forbids: [].}