re PR c++/83919 (spurious -Wignored-qualifiers warning)

	PR c++/83919
	* typeck.c (convert_for_assignment): Suppress warn_ignored_qualifiers
	for direct enum init.
	* decl.c (reshape_init): Likewise.

	* g++.dg/cpp0x/pr83919.C: New test.

From-SVN: r256903

gcc/cp/ChangeLog

+2018-01-19  Jakub Jelinek  <jakub@redhat.com>
+
+	PR c++/83919
+	* typeck.c (convert_for_assignment): Suppress warn_ignored_qualifiers
+	for direct enum init.
+	* decl.c (reshape_init): Likewise.
+
 2018-01-19  Marek Polacek  <polacek@redhat.com>
 
 	* constexpr.c (fold_simple): Simplify.

gcc/cp/decl.c

@@ -6091,6 +6091,7 @@ reshape_init (tree type, tree init, tsubst_flags_t complain)
       if (check_narrowing (ENUM_UNDERLYING_TYPE (type), elt, complain))
 	{
 	  warning_sentinel w (warn_useless_cast);
+	  warning_sentinel w2 (warn_ignored_qualifiers);
 	  return cp_build_c_cast (type, elt, tf_warning_or_error);
 	}
       else

gcc/cp/typeck.c

@@ -8689,6 +8689,7 @@ convert_for_assignment (tree type, tree rhs,
       if (check_narrowing (ENUM_UNDERLYING_TYPE (type), elt, complain))
 	{
 	  warning_sentinel w (warn_useless_cast);
+	  warning_sentinel w2 (warn_ignored_qualifiers);
 	  rhs = cp_build_c_cast (type, elt, complain);
 	}
       else

gcc/testsuite/ChangeLog

+2018-01-19  Jakub Jelinek  <jakub@redhat.com>
+
+	PR c++/83919
+	* g++.dg/cpp0x/pr83919.C: New test.
+
 2018-01-19  Jeff Law  <law@redhat.com>
 	    Jakub Jelinek  <jakub@redhat.com>
 

gcc/testsuite/g++.dg/cpp0x/pr83919.C

+// PR c++/83919
+// { dg-do compile { target c++11 } }
+// { dg-options "-Wignored-qualifiers" }
+
+enum class Conf;
+struct foo
+{
+  foo (const Conf& conf) : x{conf} {}	// { dg-bogus "type qualifiers ignored on cast result type" }
+  const Conf x;
+};