From 5dda19035d8d037e326adb697d3c613ca6a4a620 Mon Sep 17 00:00:00 2001
From: Dan Gohman <sunfish@mozilla.com>
Date: Mon, 6 Nov 2017 11:34:09 -0800
Subject: [PATCH] Implement Hash for ExternalName.

This allows users to have HashMaps etc. with ExternalNames as keys.
---
 lib/cretonne/src/ir/extname.rs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/cretonne/src/ir/extname.rs b/lib/cretonne/src/ir/extname.rs
index bd8c4e631e..273006b570 100644
--- a/lib/cretonne/src/ir/extname.rs
+++ b/lib/cretonne/src/ir/extname.rs
@@ -15,7 +15,7 @@ use std::ascii::AsciiExt;
 /// External names can also serve as a primitive testing and debugging tool.
 /// In particular, many `.cton` test files use function names to identify
 /// functions.
-#[derive(Debug, Clone, PartialEq, Eq, Default)]
+#[derive(Debug, Clone, PartialEq, Eq, Default, Hash)]
 pub struct ExternalName(NameRepr);
 
 impl ExternalName {
@@ -69,7 +69,7 @@ fn try_as_name(bytes: &[u8]) -> Option<String> {
 
 const NAME_LENGTH_THRESHOLD: usize = 22;
 
-#[derive(Debug, Clone, PartialEq, Eq)]
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
 enum NameRepr {
     Short {
         length: u8,