#ifndef LLVM_ADT_INDEXEDMAP_H
#define LLVM_ADT_INDEXEDMAP_H
#include <cassert>
#include <functional>
#include <vector>
namespace llvm {
struct IdentityFunctor : public std::unary_function<unsigned, unsigned> {
unsigned operator()(unsigned Index) const {
return Index;
}
};
template <typename T, typename ToIndexT = IdentityFunctor>
class IndexedMap {
typedef typename ToIndexT::argument_type IndexT;
typedef std::vector<T> StorageT;
StorageT storage_;
T nullVal_;
ToIndexT toIndex_;
public:
IndexedMap() : nullVal_(T()) { }
explicit IndexedMap(const T& val) : nullVal_(val) { }
typename StorageT::reference operator[](IndexT 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)];
}
void reserve(typename StorageT::size_type s) {
storage_.reserve(s);
}
void resize(typename StorageT::size_type s) {
storage_.resize(s, nullVal_);
}
void clear() {
storage_.clear();
}
void grow(IndexT n) {
unsigned NewSize = toIndex_(n) + 1;
if (NewSize > storage_.size())
resize(NewSize);
}
bool inBounds(IndexT n) const {
return toIndex_(n) < storage_.size();
}
typename StorageT::size_type size() const {
return storage_.size();
}
};
}
#endif