c-typeck.c (c_incomplete_type_error): Refactor to use %qT.

	* c-typeck.c (c_incomplete_type_error): Refactor to use %qT.  Print
	the type of a decl.

	* gcc.dg/incomplete-typedef-1.c: New test.

From-SVN: r222614

gcc/c/ChangeLog

@@ -3,6 +3,9 @@
 	* c-typeck.c (set_init_label): Call error_at instead of error and
 	pass LOC to it.
 
+	* c-typeck.c (c_incomplete_type_error): Refactor to use %qT.  Print
+	the type of a decl.
+
 2015-04-29  Thomas Schwinge  <thomas@codesourcery.com>
 
 	* c-parser.c (c_parser_oacc_enter_exit_data): Use

gcc/c/c-typeck.c

@@ -229,15 +229,13 @@ require_complete_type (tree value)
 void
 c_incomplete_type_error (const_tree value, const_tree type)
 {
-  const char *type_code_string;
-
   /* Avoid duplicate error message.  */
   if (TREE_CODE (type) == ERROR_MARK)
     return;
 
   if (value != 0 && (TREE_CODE (value) == VAR_DECL
 		     || TREE_CODE (value) == PARM_DECL))
-    error ("%qD has an incomplete type", value);
+    error ("%qD has an incomplete type %qT", value, type);
   else
     {
     retry:
@@ -246,15 +244,8 @@ c_incomplete_type_error (const_tree value, const_tree type)
       switch (TREE_CODE (type))
 	{
 	case RECORD_TYPE:
-	  type_code_string = "struct";
-	  break;
-
 	case UNION_TYPE:
-	  type_code_string = "union";
-	  break;
-
 	case ENUMERAL_TYPE:
-	  type_code_string = "enum";
 	  break;
 
 	case VOID_TYPE:
@@ -280,11 +271,10 @@ c_incomplete_type_error (const_tree value, const_tree type)
 	}
 
       if (TREE_CODE (TYPE_NAME (type)) == IDENTIFIER_NODE)
-	error ("invalid use of undefined type %<%s %E%>",
-	       type_code_string, TYPE_NAME (type));
+	error ("invalid use of undefined type %qT", type);
       else
 	/* If this type has a typedef-name, the TYPE_NAME is a TYPE_DECL.  */
-	error ("invalid use of incomplete typedef %qD", TYPE_NAME (type));
+	error ("invalid use of incomplete typedef %qT", type);
     }
 }
 

gcc/testsuite/ChangeLog

@@ -2,6 +2,8 @@
 
 	* gcc.dg/init-bad-8.c: New test.
 
+	* gcc.dg/incomplete-typedef-1.c: New test.
+
 2015-04-30  Paolo Carlini  <paolo.carlini@oracle.com>
 
 	PR c++/59955

gcc/testsuite/gcc.dg/incomplete-typedef-1.c

+/* { dg-do compile } */
+/* { dg-options "" } */
+
+typedef struct S TS;
+typedef union U TU;
+
+void
+foo (void)
+{
+  (TS) { }; /* { dg-error "invalid use of incomplete typedef" } */
+  (TU) { }; /* { dg-error "invalid use of incomplete typedef" } */
+}