feat(typing): Support generating Union aliases

[dangotbanned]

Initially covering one very specific case, PrimitiveValue.

Targeting that one specifically for use in #3653, where it will be used 3 times in a single annotation.

altair/altair/vegalite/v5/schema/_typing.py

Line 218 in 4714865

PrimitiveValue_T: TypeAlias = Union[str, bool, float, None]

Having this generated makes manually typing what will be the revision to 30b5a3c (#3653) a bit easier to read.

from collections.abc import Sequence, Mapping
from typing_extensions import TypeAlias, LiteralString

from altair.utils import Optional, SchemaBase, Undefined
from altair.vegalite.v5.schema._typing import PrimitiveValue_T, Temporal, SingleDefUnitChannel_T

# NOTE: These names are just for demo purposes
_AnyValue: TypeAlias = PrimitiveValue_T | Temporal | SchemaBase
_ChannelOrField: TypeAlias = SingleDefUnitChannel_T | LiteralString


def selection_interval(
    name: str | None = None,
    value: Optional[
        _AnyValue | Sequence[_AnyValue] | Mapping[_ChannelOrField, _AnyValue]
    ] = Undefined,
): ...

def selection_point(
    name: str | None = None,
    value: Optional[
        _AnyValue | Sequence[_AnyValue] | Mapping[SingleDefUnitChannel_T, _AnyValue]
    ] = Undefined,
): ...

Related

• https://vega.github.io/vega-lite/docs/selection.html#current-limitations