re PR c++/50075 ([C++0x] ICE related to parameter deduction and initializer_list)

	PR c++/50075
	* name-lookup.c (local_bindings_p): New.
	* name-lookup.h: Declare it.
	* lex.c (unqualified_name_lookup_error): Use it.

From-SVN: r177743

gcc/cp/ChangeLog

 2011-08-13  Jason Merrill  <jason@redhat.com>
 
+	PR c++/50075
+	* name-lookup.c (local_bindings_p): New.
+	* name-lookup.h: Declare it.
+	* lex.c (unqualified_name_lookup_error): Use it.
+
 	PR c++/50059
 	* error.c (dump_expr): Handle MODIFY_EXPR properly.
 

gcc/cp/lex.c

@@ -456,7 +456,7 @@ unqualified_name_lookup_error (tree name)
 	}
       /* Prevent repeated error messages by creating a VAR_DECL with
 	 this NAME in the innermost block scope.  */
-      if (current_function_decl)
+      if (local_bindings_p ())
 	{
 	  tree decl;
 	  decl = build_decl (input_location,

gcc/cp/name-lookup.c

@@ -1608,6 +1608,15 @@ namespace_bindings_p (void)
   return b->kind == sk_namespace;
 }
 
+/* True if the innermost non-class scope is a block scope.  */
+
+bool
+local_bindings_p (void)
+{
+  cp_binding_level *b = innermost_nonclass_level ();
+  return b->kind < sk_function_parms || b->kind == sk_omp;
+}
+
 /* True if the current level needs to have a BLOCK made.  */
 
 bool

gcc/cp/name-lookup.h

@@ -292,6 +292,7 @@ extern bool kept_level_p (void);
 extern bool global_bindings_p (void);
 extern bool toplevel_bindings_p	(void);
 extern bool namespace_bindings_p (void);
+extern bool local_bindings_p (void);
 extern bool template_parm_scope_p (void);
 extern scope_kind innermost_scope_kind (void);
 extern cp_binding_level *begin_scope (scope_kind, tree);

gcc/testsuite/ChangeLog

 2011-08-13  Jason Merrill  <jason@redhat.com>
 
+	PR c++/50075
+	* g++.dg/cpp0x/decltype32.C: New.
+
 	PR c++/50059
 	* g++.dg/diagnostic/expr1.C: New.
 

gcc/testsuite/g++.dg/cpp0x/decltype32.C

+// PR c++/50075
+// { dg-options -std=c++0x }
+
+template <typename T>
+auto make_array(const T& il) ->	// { dg-error "not declared" }
+decltype(make_array(il))
+{ }
+
+int main()
+{
+  int z = make_array(1);	// { dg-error "no match" }
+}