1 files changed, 1 insertions, 11 deletions
diff --git a/src/libsyntax_ext/proc_macro_decls.rs b/src/libsyntax_ext/proc_macro_decls.rs
index 303d5f00deb..357da6ba3c3 100644
--- a/src/libsyntax_ext/proc_macro_decls.rs
+++ b/src/libsyntax_ext/proc_macro_decls.rs
@@ -7,21 +7,15 @@ use syntax::ext::base::{ExtCtxt, MacroKind};
 use syntax::ext::build::AstBuilder;
 use syntax::ext::expand::ExpansionConfig;
 use syntax::ext::hygiene::ExpnId;
+use syntax::ext::proc_macro::is_proc_macro_attr;
 use syntax::mut_visit::MutVisitor;
 use syntax::parse::ParseSess;
 use syntax::ptr::P;
-use syntax::symbol::Symbol;
 use syntax::symbol::{kw, sym};
 use syntax::visit::{self, Visitor};
 
 use syntax_pos::{Span, DUMMY_SP};
 
-const PROC_MACRO_KINDS: [Symbol; 3] = [
-    sym::proc_macro_derive,
-    sym::proc_macro_attribute,
-    sym::proc_macro
-];
-
 struct ProcMacroDerive {
     trait_name: ast::Name,
     function_name: Ident,
@@ -88,10 +82,6 @@ pub fn modify(sess: &ParseSess,
     krate
 }
 
-pub fn is_proc_macro_attr(attr: &ast::Attribute) -> bool {
-    PROC_MACRO_KINDS.iter().any(|kind| attr.check_name(*kind))
-}
-
 impl<'a> CollectProcMacros<'a> {
     fn check_not_pub_in_root(&self, vis: &ast::Visibility, sp: Span) {
         if self.is_proc_macro_crate && self.in_root && vis.node.is_pub() {