functional_hash.h (explicit specializations of () operator): Mark pure.

	* include/tr1_impl/functional_hash.h (explicit specializations of ()
	operator): Mark pure.

From-SVN: r147062

libstdc++-v3/ChangeLog

+2009-05-02  Jan Hubicka  <jh@suse.cz>
+
+	* include/tr1_impl/functional_hash.h (explicit specializations of ()
+	operator): Mark pure.
+
 2009-04-30  Jonathan Wakely  <jwakely.gcc@gmail.com>
 
 	* scripts/create_testsuite_files: Remove thread directory.

libstdc++-v3/include/tr1_impl/functional_hash.h

@@ -157,25 +157,25 @@ _GLIBCXX_BEGIN_NAMESPACE_TR1
 
   /// Explicit specializations for long double.
   template<>
-    size_t
+    _GLIBCXX_PURE size_t
     hash<long double>::operator()(long double __val) const;
 
   /// Explicit specialization of member operator for non-builtin types.
   template<>
-    size_t
+    _GLIBCXX_PURE size_t
     hash<string>::operator()(string) const;
 
   template<>
-    size_t
+    _GLIBCXX_PURE size_t
     hash<const string&>::operator()(const string&) const;
 
 #ifdef _GLIBCXX_USE_WCHAR_T
   template<>
-    size_t
+    _GLIBCXX_PURE size_t
     hash<wstring>::operator()(wstring) const;
 
   template<>
-    size_t
+    _GLIBCXX_PURE size_t
     hash<const wstring&>::operator()(const wstring&) const;
 #endif