re PR c++/49793 ([C++0x] Narrowing conversion from int/short/char to double)

	PR c++/49793
	* typeck2.c (check_narrowing): Downgrade permerror to pedwarn.
	Make conditional on -Wnarrowing.

From-SVN: r176665

gcc/c-family/ChangeLog

 2011-07-22  Jason Merrill  <jason@redhat.com>
 
+	PR c++/49793
+	* c.opt (Wnarrowing): New.
+
 	PR c++/30112
 	* c-common.h: Declare c_linkage_bindings.
 	* c-pragma.c (handle_pragma_redefine_extname): Use it.

gcc/c-family/c.opt

@@ -489,6 +489,10 @@ Wmultichar
 C ObjC C++ ObjC++ Warning
 Warn about use of multi-character character constants
 
+Wnarrowing
+C ObjC C++ ObjC++ Warning Var(warn_narrowing) Init(1)
+-Wno-narrowing	  In C++0x mode, ignore ill-formed narrowing conversions within { }
+
 Wnested-externs
 C ObjC Var(warn_nested_externs) Warning
 Warn about \"extern\" declarations not at file scope

gcc/cp/ChangeLog

+2011-07-22  Jason Merrill  <jason@redhat.com>
+
+	PR c++/49793
+	* typeck2.c (check_narrowing): Downgrade permerror to pedwarn.
+	Make conditional on -Wnarrowing.
+
 2011-07-22  Ville Voutilainen  <ville.voutilainen@gmail.com>
 
 	Warn about the use of final/override in non-c++0x mode, and

gcc/cp/typeck2.c

@@ -719,7 +719,7 @@ check_narrowing (tree type, tree init)
   bool ok = true;
   REAL_VALUE_TYPE d;
 
-  if (!ARITHMETIC_TYPE_P (type))
+  if (!warn_narrowing || !ARITHMETIC_TYPE_P (type))
     return;
 
   if (BRACE_ENCLOSED_INITIALIZER_P (init)
@@ -777,8 +777,8 @@ check_narrowing (tree type, tree init)
     }
 
   if (!ok)
-    permerror (input_location, "narrowing conversion of %qE from %qT "
-	       "to %qT inside { }", init, ftype, type);
+    pedwarn (input_location, OPT_Wnarrowing, "narrowing conversion of %qE "
+	     "from %qT to %qT inside { }", init, ftype, type);
 }
 
 /* Process the initializer INIT for a variable of type TYPE, emitting

gcc/testsuite/ChangeLog

+2011-07-22  Jason Merrill  <jason@redhat.com>
+
+	PR c++/49793
+	* g++.dg/cpp0x/initlist55.C: New.
+
 2011-07-23  Tobias Burnus  <burnus@net-b.de>
 
 	PR fortran/49791

gcc/testsuite/g++.dg/cpp0x/initlist17.C

-// { dg-options "-std=c++0x" }
+// { dg-options "-std=c++0x -pedantic-errors" }
 
 void f(int i);
 

gcc/testsuite/g++.dg/cpp0x/initlist36.C

 // PR c++/44358
-// { dg-options "-std=c++0x" }
+// { dg-options "-std=c++0x -pedantic-errors" }
 
 #include <initializer_list>
 

gcc/testsuite/g++.dg/cpp0x/initlist5.C

 // Test for narrowing diagnostics
-// { dg-options "-std=c++0x" }
+// { dg-options "-std=c++0x -pedantic-errors" }
 
 #include <initializer_list>
 

gcc/testsuite/g++.dg/cpp0x/initlist52.C

 // PR c++/45378
-// { dg-options -std=c++0x }
+// { dg-options "-std=c++0x -pedantic-errors" }
 
 int main()
 {

gcc/testsuite/g++.dg/cpp0x/initlist7.C

 // PR c++/37932
-// { dg-options "-std=c++0x" }
+// { dg-options "-std=c++0x -pedantic-errors" }
 
 typedef enum { AA=1, BB=2 } my_enum;