-//===-- HashExtras.h - Useful functions for STL hash containers --*- C++ -*--=//
+//===-- 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.
//
//===----------------------------------------------------------------------===//
-#ifndef LLVM_SUPPORT_HASHEXTRAS_H
-#define LLVM_SUPPORT_HASHEXTRAS_H
+#ifndef LLVM_ADT_HASHEXTRAS_H
+#define LLVM_ADT_HASHEXTRAS_H
#include <string>
-#include <ext/hash_map>
// Cannot specialize hash template from outside of the std namespace.
-namespace std {
+namespace HASH_NAMESPACE {
-template <> struct hash<string> {
- size_t operator()(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);
}
};
-// Provide a hash function for arbitrary pointers...
-template <class T> struct hash<T *> {
- inline size_t operator()(const T *Val) const { return (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