From 2b91ea60231c85b368ddf58bf132a52f89b09ad4 Mon Sep 17 00:00:00 2001
From: Ned Batchelder <ned@nedbatchelder.com>
Date: Thu, 29 Dec 2022 10:49:29 -0500
Subject: mypy: use specialized type name for ints that are line numbers

---
 coverage/types.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

(limited to 'coverage/types.py')

diff --git a/coverage/types.py b/coverage/types.py
index 23c7ef8b..ee5ae010 100644
--- a/coverage/types.py
+++ b/coverage/types.py
@@ -44,4 +44,7 @@ class TConfigurable(Protocol):
 
         """
 
-TArc = Tuple[int, int]
+# Line numbers are pervasive enough that they deserve their own type.
+TLineNo = int
+
+TArc = Tuple[TLineNo, TLineNo]
-- 
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