pt.c (instantiation_dependent_r): Call value_dependent_expression_p.

	* pt.c (instantiation_dependent_r) [TRAIT_EXPR]: Call
	value_dependent_expression_p.

From-SVN: r225622

gcc/cp/ChangeLog

 2015-07-09  Jason Merrill  <jason@redhat.com>
 
+	* pt.c (instantiation_dependent_r) [TRAIT_EXPR]: Call
+	value_dependent_expression_p.
+
 	* cp-tree.h (struct cp_parameter_declarator): Rename ellipsis_p to
 	template_parameter_pack_p.
 	* parser.c (declarator_can_be_parameter_pack): False if

gcc/cp/parser.c

@@ -20788,7 +20788,7 @@ cp_parser_member_declaration (cp_parser* parser)
 	  decl = cp_parser_alias_declaration (parser);
 	  /* Note that if we actually see the '=' token after the
 	     identifier, cp_parser_alias_declaration commits the
-	     tentative parse.  In that case, we really expects an
+	     tentative parse.  In that case, we really expect an
 	     alias-declaration.  Otherwise, we expect a using
 	     declaration.  */
 	  alias_decl_expected =

gcc/cp/pt.c

@@ -20131,7 +20131,7 @@ template_for_substitution (tree decl)
 }
 
 /* Returns true if we need to instantiate this template instance even if we
-   know we aren't going to emit it..  */
+   know we aren't going to emit it.  */
 
 bool
 always_instantiate_p (tree decl)
@@ -21684,9 +21684,7 @@ instantiation_dependent_r (tree *tp, int *walk_subtrees,
       }
 
     case TRAIT_EXPR:
-      if (dependent_type_p (TRAIT_EXPR_TYPE1 (*tp))
-	  || (TRAIT_EXPR_TYPE2 (*tp)
-	      && dependent_type_p (TRAIT_EXPR_TYPE2 (*tp))))
+      if (value_dependent_expression_p (*tp))
 	return *tp;
       *walk_subtrees = false;
       return NULL_TREE;