From 5c3c27916ec708eb94d7dfba2932b94799a6e512 Mon Sep 17 00:00:00 2001
From: j-t-1 <120829237+j-t-1@users.noreply.github.com>
Date: Fri, 11 Oct 2024 08:58:22 +0100
Subject: [PATCH] MAINT: Use mypy recursive type support

In mypy>=1.7 recursive type support is built-in.
---
 pypdf/types.py | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/pypdf/types.py b/pypdf/types.py
index e383dc7b1..eae867911 100644
--- a/pypdf/types.py
+++ b/pypdf/types.py
@@ -14,19 +14,17 @@
 from .generic._outline import OutlineItem
 
 BorderArrayType: TypeAlias = List[Union[NameObject, NumberObject, ArrayObject]]
+
 OutlineItemType: TypeAlias = Union[OutlineItem, Destination]
+
 FitType: TypeAlias = Literal[
     "/XYZ", "/Fit", "/FitH", "/FitV", "/FitR", "/FitB", "/FitBH", "/FitBV"
 ]
-# Those go with the FitType: They specify values for the fit
+# These go with the FitType, they specify values for the fit
 ZoomArgType: TypeAlias = Union[NumberObject, NullObject, float]
 ZoomArgsType: TypeAlias = List[ZoomArgType]
 
-# Recursive types like the following are not yet supported by mypy:
-#    OutlineType = List[Union[Destination, "OutlineType"]]
-# See https://github.com/python/mypy/issues/731
-# Hence use this for the moment:
-OutlineType = List[Union[Destination, List[Union[Destination, List[Destination]]]]]
+OutlineType = List[Union[Destination, "OutlineType"]]
 
 LayoutType: TypeAlias = Literal[
     "/NoLayout",
@@ -37,6 +35,7 @@
     "/TwoPageLeft",
     "/TwoPageRight",
 ]
+
 PagemodeType: TypeAlias = Literal[
     "/UseNone",
     "/UseOutlines",
@@ -45,6 +44,7 @@
     "/UseOC",
     "/UseAttachments",
 ]
+
 AnnotationSubtype: TypeAlias = Literal[
     "/Text",
     "/Link",