From 31050506cd4297dbc0973d0f6dacf142858f6302 Mon Sep 17 00:00:00 2001
From: Josh Bleecher Snyder <josharian@gmail.com>
Date: Mon, 7 Aug 2017 08:41:44 -0700
Subject: [PATCH] Make Operation a stringer

This makes for more pleasant debugging.
---
 diffmatchpatch/diff.go             |  2 ++
 diffmatchpatch/operation_string.go | 17 +++++++++++++++++
 2 files changed, 19 insertions(+)
 create mode 100644 diffmatchpatch/operation_string.go

diff --git a/diffmatchpatch/diff.go b/diffmatchpatch/diff.go
index 82ad7bc..dedf4ca 100644
--- a/diffmatchpatch/diff.go
+++ b/diffmatchpatch/diff.go
@@ -25,6 +25,8 @@ import (
 // Operation defines the operation of a diff item.
 type Operation int8
 
+//go:generate stringer -type=Operation -trimprefix=Diff
+
 const (
 	// DiffDelete item represents a delete diff.
 	DiffDelete Operation = -1
diff --git a/diffmatchpatch/operation_string.go b/diffmatchpatch/operation_string.go
new file mode 100644
index 0000000..533ec0d
--- /dev/null
+++ b/diffmatchpatch/operation_string.go
@@ -0,0 +1,17 @@
+// Code generated by "stringer -type=Operation -trimprefix=Diff"; DO NOT EDIT.
+
+package diffmatchpatch
+
+import "fmt"
+
+const _Operation_name = "DeleteEqualInsert"
+
+var _Operation_index = [...]uint8{0, 6, 11, 17}
+
+func (i Operation) String() string {
+	i -= -1
+	if i < 0 || i >= Operation(len(_Operation_index)-1) {
+		return fmt.Sprintf("Operation(%d)", i+-1)
+	}
+	return _Operation_name[_Operation_index[i]:_Operation_index[i+1]]
+}