K Key;
V Val;
public:
- ScopedHashTableVal(ScopedHashTableVal *nextInScope,
+ ScopedHashTableVal(ScopedHashTableVal *nextInScope,
ScopedHashTableVal *nextForKey, const K &key, const V &val)
: NextInScope(nextInScope), NextForKey(nextForKey), Key(key), Val(val) {
}
-
+
const K &getKey() const { return Key; }
const V &getValue() const { return Val; }
V &getValue() { return Val; }
-
+
ScopedHashTableVal *getNextForKey() { return NextForKey; }
const ScopedHashTableVal *getNextForKey() const { return NextForKey; }
public:
class ScopedHashTableScope {
/// HT - The hashtable that we are active for.
ScopedHashTable<K, V> &HT;
-
+
/// PrevScope - This is the scope that we are shadowing in HT.
ScopedHashTableScope *PrevScope;
public:
ScopedHashTableScope(ScopedHashTable<K, V> &HT);
~ScopedHashTableScope();
-
+
private:
friend class ScopedHashTable<K, V>;
ScopedHashTableVal<K, V> *getLastValInScope() { return LastValInScope; }
ScopedHashTableVal<K,V> *Node;
public:
ScopedHashTableIterator(ScopedHashTableVal<K,V> *node) : Node(node){}
-
+
V &operator*() const {
assert(Node && "Dereference end()");
return Node->getValue();
V *operator->() const {
return &Node->getValue();
}
-
+
bool operator==(const ScopedHashTableIterator &RHS) const {
return Node == RHS.Node;
}
bool operator!=(const ScopedHashTableIterator &RHS) const {
return Node != RHS.Node;
}
-
+
inline ScopedHashTableIterator& operator++() { // Preincrement
assert(Node && "incrementing past end()");
Node = Node->getNextForKey();
~ScopedHashTable() {
assert(CurScope == 0 && TopLevelMap.empty() && "Scope imbalance!");
}
-
+
void insert(const K &Key, const V &Val) {
assert(CurScope && "No scope active!");
-
+
ScopedHashTableVal<K,V> *&KeyEntry = TopLevelMap[Key];
-
+
KeyEntry = new ScopedHashTableVal<K,V>(CurScope->getLastValInScope(),
KeyEntry, Key, Val);
CurScope->setLastValInScope(KeyEntry);
}
-
+
typedef ScopedHashTableIterator<K, V> iterator;
iterator end() { return iterator(0); }
iterator begin(const K &Key) {
- typename DenseMap<K, ScopedHashTableVal<K,V>*>::iterator I =
+ typename DenseMap<K, ScopedHashTableVal<K,V>*>::iterator I =
TopLevelMap.find(Key);
if (I == TopLevelMap.end()) return end();
return iterator(I->second);
ScopedHashTableScope<K, V>::~ScopedHashTableScope() {
assert(HT.CurScope == this && "Scope imbalance!");
HT.CurScope = PrevScope;
-
+
// Pop and delete all values corresponding to this scope.
while (ScopedHashTableVal<K, V> *ThisEntry = LastValInScope) {
// Pop this value out of the TopLevelMap.
assert(HT.TopLevelMap[ThisEntry->getKey()] == ThisEntry &&
"Scope imbalance!");
HT.TopLevelMap.erase(ThisEntry->getKey());
- } else {
+ } else {
ScopedHashTableVal<K,V> *&KeyEntry = HT.TopLevelMap[ThisEntry->getKey()];
assert(KeyEntry == ThisEntry && "Scope imbalance!");
KeyEntry = ThisEntry->getNextForKey();
}
-
+
// Pop this value out of the scope.
LastValInScope = ThisEntry->getNextInScope();
-
+
// Delete this entry.
delete ThisEntry;
}