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-rw-r--r--src/libsyntax/ext/build.rs6
1 files changed, 6 insertions, 0 deletions
diff --git a/src/libsyntax/ext/build.rs b/src/libsyntax/ext/build.rs
index 412a3493208..2cfb1616927 100644
--- a/src/libsyntax/ext/build.rs
+++ b/src/libsyntax/ext/build.rs
@@ -249,6 +249,8 @@ pub trait AstBuilder {
                 name: Ident, attrs: Vec<ast::Attribute>,
                 items: Vec<P<ast::Item>>) -> P<ast::Item>;
 
+    fn item_extern_crate(&self, span: Span, name: Ident) -> P<ast::Item>;
+
     fn item_static(&self,
                    span: Span,
                    name: Ident,
@@ -1095,6 +1097,10 @@ impl<'a> AstBuilder for ExtCtxt<'a> {
         )
     }
 
+    fn item_extern_crate(&self, span: Span, name: Ident) -> P<ast::Item> {
+        self.item(span, name, Vec::new(), ast::ItemKind::ExternCrate(None))
+    }
+
     fn item_static(&self,
                    span: Span,
                    name: Ident,