From 2700af36adfac4390b9395ac2ed0e534b7eac887 Mon Sep 17 00:00:00 2001
From: Nadrieril
Date: Thu, 30 Jan 2020 21:43:50 +0000
Subject: Use OnceCell to enable returning &ValKind

---
 dhall/src/semantics/builtins.rs | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

(limited to 'dhall/src/semantics/builtins.rs')

diff --git a/dhall/src/semantics/builtins.rs b/dhall/src/semantics/builtins.rs
index 85ef294..c20fb77 100644
--- a/dhall/src/semantics/builtins.rs
+++ b/dhall/src/semantics/builtins.rs
@@ -43,9 +43,9 @@ impl BuiltinClosure<Value> {
     }
     /// This doesn't break the invariant because we already checked that the appropriate arguments
     /// did not normalize to something that allows evaluation to proceed.
-    pub fn normalize_mut(&mut self) {
-        for x in self.args.iter_mut() {
-            x.normalize_mut();
+    pub fn normalize(&self) {
+        for x in self.args.iter() {
+            x.normalize();
         }
     }
     pub fn to_tyexprkind(&self, venv: VarEnv) -> TyExprKind {
-- 
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