move various bits of type-checking only code to TYPE_CHECKING blocks

Mostly detected with flake8-type-checking. Also quote T.cast() first
arguments, since those are not affected by future annotations.

2 files changed, 4 insertions, 2 deletions

diff --git a/mesonbuild/cargo/builder.py b/mesonbuild/cargo/builder.py
index 49bc65d..fb086d1 100644
--- a/mesonbuild/cargo/builder.py
+++ b/mesonbuild/cargo/builder.py
@@ -8,12 +8,14 @@ build descriptions easier.
 """
 
 from __future__ import annotations
-import builtins
 import dataclasses
 import typing as T
 
 from .. import mparser
 
+if T.TYPE_CHECKING:
+    import builtins
+
 
 def _token(tid: str, filename: str, value: mparser.TV_TokenTypes) -> mparser.Token[mparser.TV_TokenTypes]:
     """Create a Token object, but with the line numbers stubbed out.
diff --git a/mesonbuild/cargo/interpreter.py b/mesonbuild/cargo/interpreter.py
index 59e1a1f..8848a46 100644
--- a/mesonbuild/cargo/interpreter.py
+++ b/mesonbuild/cargo/interpreter.py
@@ -21,7 +21,6 @@ import typing as T
 
 from . import builder
 from . import version
-from .. import mparser
 from .._pathlib import Path
 from ..mesonlib import MesonException, Popen_safe
 
@@ -29,6 +28,7 @@ if T.TYPE_CHECKING:
     from types import ModuleType
 
     from . import manifest
+    from .. import mparser
     from ..environment import Environment
 
 # tomllib is present in python 3.11, before that it is a pypi module called tomli,