use syntax_pos::Symbol; use syntax::ast::MetaItem; use syntax::attr::{check_builtin_attribute, AttributeTemplate}; use syntax_expand::base::ExtCtxt; pub fn check_builtin_macro_attribute(ecx: &ExtCtxt<'_>, meta_item: &MetaItem, name: Symbol) { // All the built-in macro attributes are "words" at the moment. let template = AttributeTemplate::only_word(); let attr = ecx.attribute(meta_item.clone()); check_builtin_attribute(ecx.parse_sess, &attr, name, template); }