From 5de2204fe84a89604a31253a299ab265dee76934 Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Tue, 27 Nov 2001 00:03:19 +0000
Subject: Create a new #include "Support/..." directory structure to move
 things from "llvm/Support/..." that are not llvm dependant.

Move files and fix #includes

llvm-svn: 1400
---
 llvm/include/Support/HashExtras.h | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)
 create mode 100644 llvm/include/Support/HashExtras.h

(limited to 'llvm/include/Support/HashExtras.h')

diff --git a/llvm/include/Support/HashExtras.h b/llvm/include/Support/HashExtras.h
new file mode 100644
index 00000000000..6ea831e78f0
--- /dev/null
+++ b/llvm/include/Support/HashExtras.h
@@ -0,0 +1,27 @@
+//===-- HashExtras.h - Useful functions for STL hash containers --*- C++ -*--=//
+//
+// 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 LLVM_SUPPORT_HASHEXTRAS_H
+#define LLVM_SUPPORT_HASHEXTRAS_H
+
+#include <string>
+#include <hash_map>
+
+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 (size_t)Val; }
+};
+
+#endif
-- 
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