Move SmallVec and ThinVec out of libsyntax

src/libsyntax_ext/deriving/debug.rs

@@ -12,6 +12,8 @@ use deriving::path_std;
 use deriving::generic::*;
 use deriving::generic::ty::*;
 
+use rustc_data_structures::thin_vec::ThinVec;
+
 use syntax::ast::{self, Ident};
 use syntax::ast::{Expr, MetaItem};
 use syntax::ext::base::{Annotatable, ExtCtxt};
@@ -139,7 +141,7 @@ fn stmt_let_undescore(cx: &mut ExtCtxt, sp: Span, expr: P<ast::Expr>) -> ast::St
         init: Some(expr),
         id: ast::DUMMY_NODE_ID,
         span: sp,
-        attrs: ast::ThinVec::new(),
+        attrs: ThinVec::new(),
     });
     ast::Stmt {
         id: ast::DUMMY_NODE_ID,