add a traits class for SmallPtrSet that allows us to stick things that are

[oota-llvm.git] / include / llvm / ADT / HashExtras.h

diff --git a/include/llvm/ADT/HashExtras.h b/include/llvm/ADT/HashExtras.h
index da9e3f5cbadd9267d48e4c554fff290413a31454..85abf915e3c5790851fc853b94e39caa273c9fb2 100644 (file)
--- a/include/llvm/ADT/HashExtras.h
+++ b/include/llvm/ADT/HashExtras.h
@@ -1,4 +1,11 @@
-//===-- 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.
@@ -7,24 +14,25 @@
 //
 //===----------------------------------------------------------------------===//
 
-#ifndef LLVM_SUPPORT_HASHEXTRAS_H
-#define LLVM_SUPPORT_HASHEXTRAS_H
+#ifndef LLVM_ADT_HASHEXTRAS_H
+#define LLVM_ADT_HASHEXTRAS_H
 
 #include <string>
-#include <Support/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