From 1ed4b683787581aef9be7ce5e1875be823f3b4a2 Mon Sep 17 00:00:00 2001
From: Rob Rix <rob.rix@github.com>
Date: Wed, 28 Oct 2015 18:45:50 -0400
Subject: [PATCH] Restrict comparisons by category.

---
 prototype/doubt-difftool/main.swift | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/prototype/doubt-difftool/main.swift b/prototype/doubt-difftool/main.swift
index 2f9d22e84..3a5489726 100644
--- a/prototype/doubt-difftool/main.swift
+++ b/prototype/doubt-difftool/main.swift
@@ -80,7 +80,7 @@ func termWithInput(string: String) -> Term? {
 let arguments = BoundsCheckedArray(array: Process.arguments)
 if let aString = arguments[1].flatMap(readFile), bString = arguments[2].flatMap(readFile), c = arguments[3], ui = arguments[4] {
 	if let a = termWithInput(aString), b = termWithInput(bString) {
-		let diff = Interpreter<Term>(equal: Term.equals(annotation: const(true), leaf: ==), comparable: const(true), cost: Free.sum(Patch.difference)).run(a, b)
+		let diff = Interpreter<Term>(equal: Term.equals(annotation: const(true), leaf: ==), comparable: Interpreter<Term>.comparable { $0.extract.categories }, cost: Free.sum(Patch.difference)).run(a, b)
 		let range: Range<Int> -> Doubt.JSON = {
 			[
 				$0.startIndex.JSON,