Fix testsuite bugs.

	* testsuite/20_util/exchange/1.cc: Add missing return statements.
	* testsuite/20_util/pair/40925.cc: Avoid most vexing parse.
	* testsuite/22_locale/codecvt_byname/50714.cc: Add missing exception
	specifications.

From-SVN: r209196

libstdc++-v3/ChangeLog

+2014-04-07  Jonathan Wakely  <jwakely@redhat.com>
+
+	* testsuite/20_util/exchange/1.cc: Add missing return statements.
+	* testsuite/20_util/pair/40925.cc: Avoid most vexing parse.
+	* testsuite/22_locale/codecvt_byname/50714.cc: Add missing exception
+	specifications.
+
 2014-04-02  Dominique d'Humieres  <dominiq@lps.ens.fr>
 	    Jack Howarth <howarth@bromo.med.uc.edu>
 

libstdc++-v3/testsuite/20_util/exchange/1.cc

@@ -78,8 +78,8 @@ void test04()
     To() = default;
     To(const To&) = default;
     To(const From&) = delete;
-    To& operator=(const From&) { value = 1; }
-    To& operator=(From&&) { value = 2; }
+    To& operator=(const From&) { value = 1; return *this; }
+    To& operator=(From&&) { value = 2; return *this; }
   };
 
   To t;

libstdc++-v3/testsuite/20_util/pair/40925.cc

-// { dg-options "-std=gnu++0x" }
+// { dg-options "-std=gnu++11" }
 // { dg-do compile }
 
 // Copyright (C) 2009-2014 Free Software Foundation, Inc.
@@ -63,5 +63,5 @@ void test01()
   std::pair<move_only, int*> p15(move_only(), ip);
   std::pair<move_only, int X::*> p16(move_only(), mp);
 
-  std::pair<move_only, move_only> p17(move_only(), move_only());
+  std::pair<move_only, move_only> p17{move_only(), move_only()};
 }

libstdc++-v3/testsuite/22_locale/codecvt_byname/50714.cc

@@ -52,12 +52,12 @@ namespace std
 
   template<>
   int
-  codecvt<mychar, char, mbstate_t>::do_encoding() const
+  codecvt<mychar, char, mbstate_t>::do_encoding() const throw()
   { return 0; }
 
   template<>
   bool
-  codecvt<mychar, char, mbstate_t>::do_always_noconv() const
+  codecvt<mychar, char, mbstate_t>::do_always_noconv() const throw()
   { return false; }
 
   template<>
@@ -69,7 +69,7 @@ namespace std
 
   template<>
   int
-  codecvt<mychar, char, mbstate_t>::do_max_length() const
+  codecvt<mychar, char, mbstate_t>::do_max_length() const throw()
   { return 4; }
 }