From 0b2d2ccee2023198d60b48154b9b211e47b782ec Mon Sep 17 00:00:00 2001
From: NanoTech
Date: Thu, 8 Dec 2016 09:20:39 +0000
Subject: Replace Cow<'i, str> with &'i str in Expr

Cow::Owned is never used in Expr
---
 src/context.rs | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

(limited to 'src/context.rs')

diff --git a/src/context.rs b/src/context.rs
index 4d6abf2..b72182d 100644
--- a/src/context.rs
+++ b/src/context.rs
@@ -1,4 +1,3 @@
-use std::borrow::Cow;
 use std::collections::HashMap;
 
 /// A `(Context a)` associates `Text` labels with values of type `a`
@@ -14,7 +13,7 @@ use std::collections::HashMap;
 /// `n`th occurrence of a given key.
 ///
 #[derive(Debug, Clone)]
-pub struct Context<'i, T>(HashMap<Cow<'i, str>, Vec<T>>);
+pub struct Context<'i, T>(HashMap<&'i str, Vec<T>>);
 
 impl<'i, T> Context<'i, T> {
     /// An empty context with no key-value pairs
@@ -41,7 +40,7 @@ impl<'i, T> Context<'i, T> {
 
 impl<'i, T: Clone> Context<'i, T> {
     /// Add a key-value pair to the `Context`
-    pub fn insert(&self, k: Cow<'i, str>, v: T) -> Self {
+    pub fn insert(&self, k: &'i str, v: T) -> Self {
         let mut ctx = (*self).clone();
         {
             let m = ctx.0.entry(k).or_insert(vec![]);
-- 
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