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//===-- llvm/ADT/HashExtras.h - Useful functions for STL hash ---*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file contains some templates that are useful if you are working with the
// STL Hashed containers.
//
// No library is required when using these functions.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_ADT_HASHEXTRAS_H
#define LLVM_ADT_HASHEXTRAS_H
#include <string>
// Cannot specialize hash template from outside of the std namespace.
namespace HASH_NAMESPACE {
// Provide a hash function for arbitrary pointers...
template <class T> struct hash<T *> {
inline size_t operator()(const T *Val) const {
return reinterpret_cast<size_t>(Val);
}
};
template <> struct hash<std::string> {
size_t operator()(std::string const &str) const {
return hash<char const *>()(str.c_str());
}
};
} // End namespace std
#endif
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