Fix missing returns in libstdc++ header and tests

	* include/bits/locale_conv.h (wbuffer_convert::_M_put): Add missing
	return statement.
	* testsuite/21_strings/basic_string_view/operations/copy/char/1.cc:
	Return void.
	* testsuite/21_strings/basic_string_view/operations/copy/wchar_t/1.cc:
	Likewise.
	* testsuite/23_containers/map/modifiers/insert_or_assign/1.cc: Add
	missing return statements.
	* testsuite/23_containers/unordered_map/modifiers/insert_or_assign.cc:
	Likewise.
	* testsuite/27_io/basic_istream/extractors_arithmetic/char/12.cc:
	Return void.
	* testsuite/special_functions/14_expint/pr68397.cc: Likewise.

From-SVN: r249238

libstdc++-v3/ChangeLog

+2017-06-16  Jonathan Wakely  <jwakely@redhat.com>
+
+	* include/bits/locale_conv.h (wbuffer_convert::_M_put): Add missing
+	return statement.
+	* testsuite/21_strings/basic_string_view/operations/copy/char/1.cc:
+	Return void.
+	* testsuite/21_strings/basic_string_view/operations/copy/wchar_t/1.cc:
+	Likewise.
+	* testsuite/23_containers/map/modifiers/insert_or_assign/1.cc: Add
+	missing return statements.
+	* testsuite/23_containers/unordered_map/modifiers/insert_or_assign.cc:
+	Likewise.
+	* testsuite/27_io/basic_istream/extractors_arithmetic/char/12.cc:
+	Return void.
+	* testsuite/special_functions/14_expint/pr68397.cc: Likewise.
+
 2017-06-16  François Dumont  <fdumont@gcc.gnu.org>
 
 	* include/bits/stl_bvector.h

libstdc++-v3/include/bits/locale_conv.h

@@ -482,6 +482,7 @@ _GLIBCXX_END_NAMESPACE_CXX11
       {
 	if (_M_buf->sputn(__p, __n) < __n)
 	  return false;
+	return true;
       }
 
       // convert the put area and write to the byte stream buffer

libstdc++-v3/testsuite/21_strings/basic_string_view/operations/copy/char/1.cc

@@ -22,7 +22,7 @@
 #include <string_view>
 #include <testsuite_hooks.h>
 
-bool
+void
 test01()
 {
   typedef std::string_view::size_type csize_type;

libstdc++-v3/testsuite/21_strings/basic_string_view/operations/copy/wchar_t/1.cc

@@ -22,7 +22,7 @@
 #include <string_view>
 #include <testsuite_hooks.h>
 
-bool
+void
 test01()
 {
   typedef std::wstring_view::size_type csize_type;

libstdc++-v3/testsuite/23_containers/map/modifiers/insert_or_assign/1.cc

@@ -39,10 +39,12 @@ struct Val
   {
     val = other.val;
     other.moved_from_assign = true;
+    return *this;
   }
   Val& operator=(const Val& other)
   {
     val = other.val;
+    return *this;
   }
 };
 

libstdc++-v3/testsuite/23_containers/unordered_map/modifiers/insert_or_assign.cc

@@ -38,10 +38,12 @@ struct Val
   {
     val = other.val;
     other.moved_from_assign = true;
+    return *this;
   }
   Val& operator=(const Val& other)
   {
     val = other.val;
+    return *this;
   }
 };
 

libstdc++-v3/testsuite/27_io/basic_istream/extractors_arithmetic/char/12.cc

@@ -50,7 +50,7 @@ void test12_aux(bool integer_type)
   VERIFY(is.fail());
 }
 
-bool test12()
+void test12()
 {
   test12_aux<short>(true);
   test12_aux<int>(true);

libstdc++-v3/testsuite/special_functions/14_expint/pr68397.cc

@@ -23,7 +23,7 @@
 #include <cmath>
 #include <testsuite_hooks.h>
 
-int
+void
 test01()
 {
   // Answers from Wolfram Alpha.