re PR libstdc++/9580 (basic_filebuf<> with custom traits_type fails to link)

2003-02-17  Paolo Carlini  <pcarlini@unitus.it>

	PR libstdc++/9580
	* include/std/std_fstream.h: Declare underflow and uflow
	specializations, change generic definitions to do nothing.
	* src/fstream.cc: Add underflow and uflow specializations.

From-SVN: r63008

libstdc++-v3/ChangeLog

 2003-02-17  Paolo Carlini  <pcarlini@unitus.it>
 
+	PR libstdc++/9580
+	* include/std/std_fstream.h: Declare underflow and uflow
+	specializations, change generic definitions to do nothing.
+	* src/fstream.cc: Add underflow and uflow specializations.
+
+2003-02-17  Paolo Carlini  <pcarlini@unitus.it>
+
 	PR libstdc++/9169
 	* include/bits/fstream.tcc (_M_convert_to_external):
 	Deal correctly with noconv, as prescribed by 27.8.1.4,p8.

libstdc++-v3/include/std/std_fstream.h

@@ -439,23 +439,38 @@ namespace std
     basic_filebuf<char>::int_type 
     basic_filebuf<char>::_M_underflow_common(bool __bump);
 
+  template<>
+    basic_filebuf<char>::int_type
+    basic_filebuf<char>::underflow(); 
+
+  template<>
+    basic_filebuf<char>::int_type
+    basic_filebuf<char>::uflow(); 
+
  #ifdef _GLIBCPP_USE_WCHAR_T
   template<> 
     basic_filebuf<wchar_t>::int_type 
     basic_filebuf<wchar_t>::_M_underflow_common(bool __bump);
+
+  template<>
+    basic_filebuf<wchar_t>::int_type
+    basic_filebuf<wchar_t>::underflow(); 
+
+  template<>
+    basic_filebuf<wchar_t>::int_type
+    basic_filebuf<wchar_t>::uflow(); 
  #endif
 
-  // Generic definitions.
+  // Generic definitions do nothing.
   template <typename _CharT, typename _Traits>
     typename basic_filebuf<_CharT, _Traits>::int_type
     basic_filebuf<_CharT, _Traits>::underflow() 
-    { return _M_underflow_common(false); }
+    { return int_type(); }
 
   template <typename _CharT, typename _Traits>
     typename basic_filebuf<_CharT, _Traits>::int_type
     basic_filebuf<_CharT, _Traits>::uflow() 
-    { return _M_underflow_common(true); }
-
+    { return int_type(); }
 
   // [27.8.1.5] Template class basic_ifstream
   /**

libstdc++-v3/src/fstream.cc

@@ -100,6 +100,16 @@ namespace std
       return __ret;
     }
 
+  template<>
+    basic_filebuf<char>::int_type
+    basic_filebuf<char>::underflow() 
+    { return _M_underflow_common(false); }
+
+  template<>
+    basic_filebuf<char>::int_type
+    basic_filebuf<char>::uflow() 
+    { return _M_underflow_common(true); }
+
 #ifdef _GLIBCPP_USE_WCHAR_T
   template<> 
     basic_filebuf<wchar_t>::int_type 
@@ -189,5 +199,15 @@ namespace std
       _M_last_overflowed = false;	
       return __ret;
     }
+
+  template<>
+    basic_filebuf<wchar_t>::int_type
+    basic_filebuf<wchar_t>::underflow() 
+    { return _M_underflow_common(false); }
+
+  template<>
+    basic_filebuf<wchar_t>::int_type
+    basic_filebuf<wchar_t>::uflow() 
+    { return _M_underflow_common(true); }
 #endif
 } // namespace std