//===-- HashExtras.h - Useful functions for STL hash containers -*- C++ -*-===// // // The LLVM Compiler Infrastructure // // This file was developed by the LLVM research group and 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 functinons. // //===----------------------------------------------------------------------===// #ifndef SUPPORT_HASHEXTRAS_H #define SUPPORT_HASHEXTRAS_H #include "Support/hash_map" #include <string> // Cannot specialize hash template from outside of the std namespace. namespace HASH_NAMESPACE { template <> struct hash<std::string> { size_t operator()(std::string const &str) const { return hash<char const *>()(str.c_str()); } }; // 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); } }; } // End namespace std #endif