-// Copyright 2015 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 std::hash::BuildHasherDefault;
-pub use rustc_hash::{FxHasher, FxHashMap, FxHashSet};
+pub use rustc_hash::{FxHashMap, FxHashSet, FxHasher};
+
+pub type FxIndexMap<K, V> = indexmap::IndexMap<K, V, BuildHasherDefault<FxHasher>>;
+pub type FxIndexSet<V> = indexmap::IndexSet<V, BuildHasherDefault<FxHasher>>;
+
+#[macro_export]
+macro_rules! define_id_collections {
+ ($map_name:ident, $set_name:ident, $key:ty) => {
+ pub type $map_name<T> = $crate::fx::FxHashMap<$key, T>;
+ pub type $set_name = $crate::fx::FxHashSet<$key>;
+ };
+}