From 574e787bf12148191477bc01abbf742f65e2e4ee Mon Sep 17 00:00:00 2001
From: Daniel Eades <danieleades@hotmail.com>
Date: Mon, 10 Jan 2022 15:35:27 +0000
Subject: [PATCH] use class-style syntax for 'NamedTuple's

---
 sphinx/builders/linkcheck.py | 37 ++++++++++++++++++++++++------------
 1 file changed, 25 insertions(+), 12 deletions(-)

diff --git a/sphinx/builders/linkcheck.py b/sphinx/builders/linkcheck.py
index 61b6b45f9..ea8aaa300 100644
--- a/sphinx/builders/linkcheck.py
+++ b/sphinx/builders/linkcheck.py
@@ -43,18 +43,31 @@ logger = logging.getLogger(__name__)
 
 uri_re = re.compile('([a-z]+:)?//')  # matches to foo:// and // (a protocol relative URL)
 
-Hyperlink = NamedTuple('Hyperlink', (('uri', str),
-                                     ('docname', str),
-                                     ('lineno', Optional[int])))
-CheckRequest = NamedTuple('CheckRequest', (('next_check', float),
-                                           ('hyperlink', Optional[Hyperlink])))
-CheckResult = NamedTuple('CheckResult', (('uri', str),
-                                         ('docname', str),
-                                         ('lineno', int),
-                                         ('status', str),
-                                         ('message', str),
-                                         ('code', int)))
-RateLimit = NamedTuple('RateLimit', (('delay', float), ('next_check', float)))
+
+class Hyperlink(NamedTuple):
+    uri: str
+    docname: str
+    lineno: Optional[int]
+
+
+class CheckRequest(NamedTuple):
+    next_check: float
+    hyperlink: Optional[Hyperlink]
+
+
+class CheckResult(NamedTuple):
+    uri: str
+    docname: str
+    lineno: int
+    status: str
+    message: str
+    code: int
+
+
+class RateLimit(NamedTuple):
+    delay: float
+    next_check: float
+
 
 # Tuple is old styled CheckRequest
 CheckRequestType = Union[CheckRequest, Tuple[float, str, str, int]]