From 97a7a105d27caf995a8d8534fd6266d701e1aa15 Mon Sep 17 00:00:00 2001
From: Rob Rix <rob.rix@github.com>
Date: Tue, 27 Oct 2015 18:13:49 -0400
Subject: [PATCH] Map to source ranges.

---
 prototype/doubt-difftool/main.swift | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/prototype/doubt-difftool/main.swift b/prototype/doubt-difftool/main.swift
index 72d2ac533..c7e17b2b2 100644
--- a/prototype/doubt-difftool/main.swift
+++ b/prototype/doubt-difftool/main.swift
@@ -40,7 +40,7 @@ if let a = arguments[1] {
 	ts_document_parse(document)
 	let root = ts_document_root_node(document)
 
-	let term = Cofree<String, TSNode>
+	let term: Cofree<String, Range<Int>> = Cofree
 		.ana { node in
 			let count = ts_node_child_count(node)
 			guard count > 0 else {
@@ -48,6 +48,10 @@ if let a = arguments[1] {
 			}
 			return .Indexed((0..<count).map { ts_node_child(node, $0) })
 		} (root)
+		.map {
+			let start = ts_node_pos($0).chars
+			return start..<(start + ts_node_size($0).chars)
+		}
 
 	print(term)