From 181d80073a88ccce6925dd5663bb2c5c716d6e54 Mon Sep 17 00:00:00 2001
From: Bryan Newbold <bnewbold@robocracy.org>
Date: Wed, 9 Jan 2019 17:57:36 -0800
Subject: implement Display (not ToString) for FatCatId

---
 rust/src/identifiers.rs | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/rust/src/identifiers.rs b/rust/src/identifiers.rs
index 386570b9..5cfa2fb6 100644
--- a/rust/src/identifiers.rs
+++ b/rust/src/identifiers.rs
@@ -4,13 +4,15 @@ use regex::Regex;
 use serde_json;
 use std::str::FromStr;
 use uuid::Uuid;
+use std::fmt;
+
 
 #[derive(Clone, Copy, PartialEq, Debug)]
 pub struct FatCatId(Uuid);
 
-impl ToString for FatCatId {
-    fn to_string(&self) -> String {
-        uuid2fcid(&self.to_uuid())
+impl fmt::Display for FatCatId {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "{}", uuid2fcid(&self.to_uuid()))
     }
 }
 
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