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| author | Alkis Evlogimenos <alkis@evlogimenos.com> | 2004-08-26 03:37:28 +0000 |
|---|---|---|
| committer | Alkis Evlogimenos <alkis@evlogimenos.com> | 2004-08-26 03:37:28 +0000 |
| commit | 5501e568b396f3e58f3d642e77139c790eda9df9 (patch) | |
| tree | 446bb1f6ab318d378b8c948f269cd81a288cef73 /include/llvm/ADT | |
| parent | 07b52b367f2c89e21c8c8d8430760575a81adfe7 (diff) | |
| download | external_llvm-5501e568b396f3e58f3d642e77139c790eda9df9.zip external_llvm-5501e568b396f3e58f3d642e77139c790eda9df9.tar.gz external_llvm-5501e568b396f3e58f3d642e77139c790eda9df9.tar.bz2 | |
Add default index functor (an identity functor). You could use a
vector directly to get the same functionality but using a DenseMap
makes the code more readable IMO.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16052 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'include/llvm/ADT')
| -rw-r--r-- | include/llvm/ADT/DenseMap.h | 30 | ||||
| -rw-r--r-- | include/llvm/ADT/IndexedMap.h | 30 |
2 files changed, 36 insertions, 24 deletions
diff --git a/include/llvm/ADT/DenseMap.h b/include/llvm/ADT/DenseMap.h index 9d55435..2cf5990 100644 --- a/include/llvm/ADT/DenseMap.h +++ b/include/llvm/ADT/DenseMap.h @@ -24,39 +24,45 @@ namespace llvm { -template <typename T, typename ToIndexT> -class DenseMap { + struct IdentityFunctor : std::unary_function<unsigned, unsigned> { + unsigned operator()(unsigned Index) const { + return Index; + } + }; + + template <typename T, typename ToIndexT = IdentityFunctor> + class DenseMap { typedef typename ToIndexT::argument_type IndexT; typedef std::vector<T> StorageT; StorageT storage_; T nullVal_; ToIndexT toIndex_; -public: + public: DenseMap() : nullVal_(T()) { } explicit DenseMap(const T& val) : nullVal_(val) { } typename StorageT::reference operator[](IndexT n) { - assert(toIndex_(n) < storage_.size() && "index out of bounds!"); - return storage_[toIndex_(n)]; + assert(toIndex_(n) < storage_.size() && "index out of bounds!"); + return storage_[toIndex_(n)]; } typename StorageT::const_reference operator[](IndexT n) const { - assert(toIndex_(n) < storage_.size() && "index out of bounds!"); - return storage_[toIndex_(n)]; + assert(toIndex_(n) < storage_.size() && "index out of bounds!"); + return storage_[toIndex_(n)]; } void clear() { - storage_.clear(); + storage_.clear(); } void grow(IndexT n) { - unsigned NewSize = toIndex_(n) + 1; - if (NewSize > storage_.size()) - storage_.resize(NewSize, nullVal_); + unsigned NewSize = toIndex_(n) + 1; + if (NewSize > storage_.size()) + storage_.resize(NewSize, nullVal_); } -}; + }; } // End llvm namespace diff --git a/include/llvm/ADT/IndexedMap.h b/include/llvm/ADT/IndexedMap.h index 9d55435..2cf5990 100644 --- a/include/llvm/ADT/IndexedMap.h +++ b/include/llvm/ADT/IndexedMap.h @@ -24,39 +24,45 @@ namespace llvm { -template <typename T, typename ToIndexT> -class DenseMap { + struct IdentityFunctor : std::unary_function<unsigned, unsigned> { + unsigned operator()(unsigned Index) const { + return Index; + } + }; + + template <typename T, typename ToIndexT = IdentityFunctor> + class DenseMap { typedef typename ToIndexT::argument_type IndexT; typedef std::vector<T> StorageT; StorageT storage_; T nullVal_; ToIndexT toIndex_; -public: + public: DenseMap() : nullVal_(T()) { } explicit DenseMap(const T& val) : nullVal_(val) { } typename StorageT::reference operator[](IndexT n) { - assert(toIndex_(n) < storage_.size() && "index out of bounds!"); - return storage_[toIndex_(n)]; + assert(toIndex_(n) < storage_.size() && "index out of bounds!"); + return storage_[toIndex_(n)]; } typename StorageT::const_reference operator[](IndexT n) const { - assert(toIndex_(n) < storage_.size() && "index out of bounds!"); - return storage_[toIndex_(n)]; + assert(toIndex_(n) < storage_.size() && "index out of bounds!"); + return storage_[toIndex_(n)]; } void clear() { - storage_.clear(); + storage_.clear(); } void grow(IndexT n) { - unsigned NewSize = toIndex_(n) + 1; - if (NewSize > storage_.size()) - storage_.resize(NewSize, nullVal_); + unsigned NewSize = toIndex_(n) + 1; + if (NewSize > storage_.size()) + storage_.resize(NewSize, nullVal_); } -}; + }; } // End llvm namespace |