// continue parsing.
var errNeedMore = errors.New("need more data")

type indexType int

const (
	indexedTrue indexType = iota
	indexedFalse
	indexedNever
)

func (v indexType) indexed() bool   { return v == indexedTrue }
func (v indexType) sensitive() bool { return v == indexedNever }

// returns errNeedMore if there isn't enough data available.

}

Operation* InsertCast(OpBuilder& b, Location loc, Type dst_type, Value input) {
  Type element_type = getElementTypeOrSelf(dst_type);
  if (mlir::isa<IndexType>(element_type))
    return b.create<tensor::CastOp>(loc, dst_type, input);
  if (isa<TensorFlowDialect, BuiltinDialect>(element_type.getDialect()))
    return b.create<TF::CastOp>(loc, dst_type, input,