options: Replace uses of `UserOption[T.Any]` with a Union of UserOption types

The fact that UserOption is generic is really an implementation detail,
not something to be used publicly. So by having an `AnyOptionType`
alias, we can get better type checking, as can be seen by the patch as a
whole. One of the big fixes it replace open-coded equivlalents of
`MutableKeydOptionDictType` with that type alias.

1 files changed, 1 insertions, 1 deletions

diff --git a/mesonbuild/optinterpreter.py b/mesonbuild/optinterpreter.py
index 8c0d1daec..9f95925fa 100644
--- a/mesonbuild/optinterpreter.py
+++ b/mesonbuild/optinterpreter.py
@@ -69,7 +69,7 @@ class OptionInterpreter:
     def __init__(self, optionstore: 'OptionStore', subproject: 'SubProject') -> None:
         self.options: 'coredata.MutableKeyedOptionDictType' = {}
         self.subproject = subproject
-        self.option_types: T.Dict[str, T.Callable[..., options.UserOption]] = {
+        self.option_types: T.Dict[str, T.Callable[..., options.AnyOptionType]] = {
             'string': self.string_parser,
             'boolean': self.boolean_parser,
             'combo': self.combo_parser,