Auto merge of #28009 - GuillaumeGomez:patch-1, r=Manishearth

r? @Manishearth
rust-lang · Aug 31, 2015 · f9f82f8 · f9f82f8
2 parents 6d6bf81 + b874660
commit f9f82f8
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/src/librustc_typeck/check/mod.rs b/src/librustc_typeck/check/mod.rs
@@ -729,6 +729,9 @@ pub fn check_item_type<'a,'tcx>(ccx: &CrateCtxt<'a,'tcx>, it: &'tcx ast::Item) {
                 if !pty.generics.types.is_empty() {
                     span_err!(ccx.tcx.sess, item.span, E0044,
                         "foreign items may not have type parameters");
+                    span_help!(ccx.tcx.sess, item.span,
+                        "consider using specialization instead of \
+                        type parameters");
                 }
 
                 if let ast::ForeignItemFn(ref fn_decl, _) = item.node {