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[ty] Ensure Literal types are considered assignable to anything their Instance supertypes are assignable to (#18351)
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Matthew Mckee 2025-06-01 16:39:56 +01:00 • committed by GitHub
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7
crates/ty_python_semantic/resources/mdtest/type_properties/is_assignable_to.md
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@ -97,12 +97,19 @@ turn a subtype of `str`:
```py
from ty_extensions import static_assert, is_assignable_to
from typing_extensions import Literal, LiteralString
from typing import Sequence, Any
static_assert(is_assignable_to(Literal["foo"], Literal["foo"]))
static_assert(is_assignable_to(Literal["foo"], LiteralString))
static_assert(is_assignable_to(Literal["foo"], str))
static_assert(is_assignable_to(Literal["foo"], Sequence))
static_assert(is_assignable_to(Literal["foo"], Sequence[str]))
static_assert(is_assignable_to(Literal["foo"], Sequence[Any]))
static_assert(is_assignable_to(LiteralString, str))
static_assert(is_assignable_to(LiteralString, Sequence))
static_assert(is_assignable_to(LiteralString, Sequence[str]))
static_assert(is_assignable_to(LiteralString, Sequence[Any]))
static_assert(not is_assignable_to(Literal["foo"], Literal["bar"]))
static_assert(not is_assignable_to(str, Literal["foo"]))