use rustc_expand::base::ExtCtxt;
use rustc_feature::AttributeTemplate;
use rustc_parse::validate_attr;
+use rustc_span::Symbol;
use syntax::ast::MetaItem;
-use syntax_pos::Symbol;
pub fn check_builtin_macro_attribute(ecx: &ExtCtxt<'_>, meta_item: &MetaItem, name: Symbol) {
// All the built-in macro attributes are "words" at the moment.