From 367719d4082776f66504ba40bf47a319b2a7d8d9 Mon Sep 17 00:00:00 2001
From: greg <greg.shuflin@protonmail.com>
Date: Thu, 8 Mar 2018 00:32:19 -0800
Subject: [PATCH] Tighten some code

---
 src/schala_lang/eval.rs | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/src/schala_lang/eval.rs b/src/schala_lang/eval.rs
index 94c521b..fa940e1 100644
--- a/src/schala_lang/eval.rs
+++ b/src/schala_lang/eval.rs
@@ -175,14 +175,13 @@ impl<'a> State<'a> {
         }
         self.eval_application(*f, evaled_arguments)
       },
-      Index { box indexee, mut indexers } => {
+      Index { box indexee, indexers } => {
         let evaled = self.eval_expr(indexee)?;
         match evaled {
           Tuple(mut exprs) => {
             let len = indexers.len();
             if len == 1 {
-              indexers.truncate(1);
-              let idx = indexers.pop().unwrap();
+              let idx = indexers.into_iter().nth(0).unwrap();
               match self.eval_expr(idx)? {
                 UnsignedInt(n) if (n as usize) < exprs.len() => Ok(exprs.drain(n as usize..).next().unwrap()),
                 UnsignedInt(n) => Err(format!("Index {} out of range", n)),