Generalized base::unsized_info

src/librustc_codegen_llvm/interfaces/misc.rs

@@ -0,0 +1,21 @@
+// Copyright 2018 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+use super::backend::Backend;
+use rustc::ty::{self, Instance, Ty};
+use rustc::util::nodemap::FxHashMap;
+use std::cell::RefCell;
+
+pub trait MiscMethods<'tcx>: Backend<'tcx> {
+    fn vtables(
+        &self,
+    ) -> &RefCell<FxHashMap<(Ty<'tcx>, ty::PolyExistentialTraitRef<'tcx>), Self::Value>>;
+    fn get_fn(&self, instance: Instance<'tcx>) -> Self::Value;
+}