+ /// Convenience iterator for directly iterating over the Values in the
+ /// OperandList
+ class value_op_iterator : public std::iterator<std::forward_iterator_tag,
+ Value*> {
+ op_iterator OI;
+ public:
+ explicit value_op_iterator(Use *U) : OI(U) {}
+
+ bool operator==(const value_op_iterator &x) const {
+ return OI == x.OI;
+ }
+ bool operator!=(const value_op_iterator &x) const {
+ return !operator==(x);
+ }
+
+ /// Iterator traversal: forward iteration only
+ value_op_iterator &operator++() { // Preincrement
+ ++OI;
+ return *this;
+ }
+ value_op_iterator operator++(int) { // Postincrement
+ value_op_iterator tmp = *this; ++*this; return tmp;
+ }
+
+ /// Retrieve a pointer to the current Value.
+ Value *operator*() const {
+ return *OI;
+ }
+
+ Value *operator->() const { return operator*(); }
+ };
+
+ inline value_op_iterator value_op_begin() {
+ return value_op_iterator(op_begin());
+ }
+ inline value_op_iterator value_op_end() {
+ return value_op_iterator(op_end());
+ }
+