From 9117148f42371108f49de84ff765da987dcb5917 Mon Sep 17 00:00:00 2001
From: Edwin Cheng <edwin0cheng@gmail.com>
Date: Sat, 13 Mar 2021 20:17:54 +0800
Subject: Add bindings builder for speed up matching

---
 crates/mbe/src/expander.rs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'crates/mbe/src/expander.rs')

diff --git a/crates/mbe/src/expander.rs b/crates/mbe/src/expander.rs
index 2efff8f52..3197c834c 100644
--- a/crates/mbe/src/expander.rs
+++ b/crates/mbe/src/expander.rs
@@ -5,7 +5,7 @@
 mod matcher;
 mod transcriber;
 
-use smallvec::SmallVec;
+use rustc_hash::FxHashMap;
 use syntax::SmolStr;
 
 use crate::{ExpandError, ExpandResult};
@@ -96,7 +96,7 @@ pub(crate) fn expand_rules(
 /// many is not a plain `usize`, but an `&[usize]`.
 #[derive(Debug, Default, Clone, PartialEq, Eq)]
 struct Bindings {
-    inner: SmallVec<[(SmolStr, Binding); 4]>,
+    inner: FxHashMap<SmolStr, Binding>,
 }
 
 #[derive(Debug, Clone, PartialEq, Eq)]
-- 
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