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Add a ValueInfoT template parameter to DenseMap so that it can properly make decisions

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based on whether the key AND the value require ctors/dtors.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41837 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Owen Anderson 2007-09-11 05:08:05 +00:00
parent 98153ecbc1
commit 29ce95511f
1 changed files with 22 additions and 8 deletions
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30
include/llvm/ADT/DenseMap.h
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@ -41,15 +41,29 @@ struct DenseMapKeyInfo<T*> {
static bool isPod() { return true; }
};
template<typename T>
struct DenseMapValueInfo {
//static bool isPod()
};
// Provide DenseMapValueInfo for all pointers.
template<typename T>
struct DenseMapValueInfo<T*> {
static bool isPod() { return true; }
};
template<typename KeyT, typename ValueT,
typename KeyInfoT = DenseMapKeyInfo<KeyT> >
typename KeyInfoT = DenseMapKeyInfo<KeyT>,
typename ValueInfoT = DenseMapValueInfo<ValueT> >
class DenseMapIterator;
template<typename KeyT, typename ValueT,
typename KeyInfoT = DenseMapKeyInfo<KeyT> >
typename KeyInfoT = DenseMapKeyInfo<KeyT>,
typename ValueInfoT = DenseMapValueInfo<ValueT> >
class DenseMapConstIterator;
template<typename KeyT, typename ValueT,
typename KeyInfoT = DenseMapKeyInfo<KeyT> >
typename KeyInfoT = DenseMapKeyInfo<KeyT>,
typename ValueInfoT = DenseMapValueInfo<ValueT> >
class DenseMap {
typedef std::pair<KeyT, ValueT> BucketT;
unsigned NumBuckets;
@ -181,7 +195,7 @@ public:
private:
void CopyFrom(const DenseMap& other) {
if (NumBuckets != 0 && !KeyInfoT::isPod()) {
if (NumBuckets != 0 && (!KeyInfoT::isPod() || !ValueInfoT::isPod())) {
const KeyT EmptyKey = getEmptyKey(), TombstoneKey = getTombstoneKey();
for (BucketT *P = Buckets, *E = Buckets+NumBuckets; P != E; ++P) {
if (P->first != EmptyKey && P->first != TombstoneKey)
@ -198,13 +212,13 @@ private:
Buckets = reinterpret_cast<BucketT*>(new char[sizeof(BucketT) *
other.NumBuckets]);
if (KeyInfoT::isPod())
if (KeyInfoT::isPod() && ValueInfoT::isPod())
memcpy(Buckets, other.Buckets, other.NumBuckets * sizeof(BucketT));
else
for (size_t i = 0; i < other.NumBuckets; ++i) {
new (Buckets[i].first) KeyT(other.Buckets[i].first);
if (Buckets[i].first != getEmptyKey() &&
Buckets[i].first != getTombstoneKey())
Buckets[i].first != getTombstoneKey())
new (Buckets[i].second) ValueT(other.Buckets[i].second);
}
NumBuckets = other.NumBuckets;
@ -373,7 +387,7 @@ private:
}
};
template<typename KeyT, typename ValueT, typename KeyInfoT>
template<typename KeyT, typename ValueT, typename KeyInfoT, typename ValueInfoT>
class DenseMapIterator {
typedef std::pair<KeyT, ValueT> BucketT;
protected:
@ -416,7 +430,7 @@ private:
}
};
template<typename KeyT, typename ValueT, typename KeyInfoT>
template<typename KeyT, typename ValueT, typename KeyInfoT, typename ValueInfoT>
class DenseMapConstIterator : public DenseMapIterator<KeyT, ValueT, KeyInfoT> {
public:
DenseMapConstIterator(const std::pair<KeyT, ValueT> *Pos,