#ifndef LLVM_ADT_ILIST_NODE_H
#define LLVM_ADT_ILIST_NODE_H
namespace llvm {
template<typename NodeTy>
struct ilist_traits;
template<typename NodeTy>
class ilist_half_node {
friend struct ilist_traits<NodeTy>;
NodeTy *Prev;
protected:
NodeTy *getPrev() { return Prev; }
const NodeTy *getPrev() const { return Prev; }
void setPrev(NodeTy *P) { Prev = P; }
ilist_half_node() : Prev(0) {}
};
template<typename NodeTy>
struct ilist_nextprev_traits;
template<typename NodeTy>
class ilist_node : private ilist_half_node<NodeTy> {
friend struct ilist_nextprev_traits<NodeTy>;
friend struct ilist_traits<NodeTy>;
NodeTy *Next;
NodeTy *getNext() { return Next; }
const NodeTy *getNext() const { return Next; }
void setNext(NodeTy *N) { Next = N; }
protected:
ilist_node() : Next(0) {}
public:
NodeTy *getPrevNode() {
NodeTy *Prev = this->getPrev();
if (!Prev->getNext())
return 0;
return Prev;
}
const NodeTy *getPrevNode() const {
const NodeTy *Prev = this->getPrev();
if (!Prev->getNext())
return 0;
return Prev;
}
NodeTy *getNextNode() {
NodeTy *Next = getNext();
if (!Next->getNext())
return 0;
return Next;
}
const NodeTy *getNextNode() const {
const NodeTy *Next = getNext();
if (!Next->getNext())
return 0;
return Next;
}
};
}
#endif