From b49ed30f6866db6dc7da379ef00348b9662361ef Mon Sep 17 00:00:00 2001
From: Callum Forrester <callum.forrester@diamond.ac.uk>
Date: Mon, 16 Sep 2024 16:01:33 +0100
Subject: [PATCH] Fix docs build

---
 docs/conf.py         | 1 +
 src/scanspec/core.py | 4 ++--
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/docs/conf.py b/docs/conf.py
index acfda3be..4e376ee9 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -72,6 +72,7 @@
 # ('envvar', 'LD_LIBRARY_PATH').
 nitpick_ignore = [
     ("py:class", "scanspec.core.C"),
+    ("py:class", "scanspec.core.T"),
     ("py:class", "pydantic.config.ConfigDict"),
 ]
 
diff --git a/src/scanspec/core.py b/src/scanspec/core.py
index b216b99a..4a4edb69 100644
--- a/src/scanspec/core.py
+++ b/src/scanspec/core.py
@@ -189,7 +189,7 @@ def _make_schema(
     return {member.__name__: handler(member) for member in members}
 
 
-def if_instance_do(x: C, cls: type[C], func: Callable[[C], T]):
+def if_instance_do(x: C, cls: type[C], func: Callable[[C], T]) -> T:
     """If x is of type cls then return func(x), otherwise return NotImplemented.
 
     Used as a helper when implementing operator overloading.
@@ -428,7 +428,7 @@ def from_frames(
         return cls(frames.midpoints, frames.lower, frames.upper, frames.gap)
 
     def extract(
-        self, indices: npt.NDArray[np.int32], calculate_gap: bool = True
+        self, indices: npt.NDArray[np.signedinteger[Any]], calculate_gap: bool = True
     ) -> Frames[Axis]:
         """Return a new Frames object restricted to the indices provided.