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add static_asserts
This commit is contained in:
Douglas Creager
parent
6b6937fde5
commit
38f857af13
1 changed files with 259 additions and 3 deletions
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@ -129,7 +129,7 @@ specialization. Thus, the typevar is a subtype of itself and of `object`, but no
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(including other typevars).
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```py
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from ty_extensions import is_assignable_to, is_subtype_of
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from ty_extensions import is_assignable_to, is_subtype_of, static_assert
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class Super: ...
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class Base(Super): ...
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@ -139,45 +139,83 @@ class Unrelated: ...
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def unbounded_unconstrained[T, U](t: T, u: U) -> None:
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# revealed: ty_extensions.ConstraintSet[always]
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reveal_type(is_assignable_to(T, T))
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static_assert(is_assignable_to(T, T))
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# revealed: ty_extensions.ConstraintSet[always]
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reveal_type(is_assignable_to(T, object))
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static_assert(is_assignable_to(T, object))
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# revealed: ty_extensions.ConstraintSet[never]
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reveal_type(is_assignable_to(T, Super))
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static_assert(not is_assignable_to(T, Super))
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# revealed: ty_extensions.ConstraintSet[always]
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reveal_type(is_assignable_to(T, Any))
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static_assert(is_assignable_to(T, Any))
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# revealed: ty_extensions.ConstraintSet[always]
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reveal_type(is_assignable_to(Any, T))
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static_assert(is_assignable_to(Any, T))
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# revealed: ty_extensions.ConstraintSet[always]
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reveal_type(is_assignable_to(U, U))
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static_assert(is_assignable_to(U, U))
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# revealed: ty_extensions.ConstraintSet[always]
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reveal_type(is_assignable_to(U, object))
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static_assert(is_assignable_to(U, object))
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# revealed: ty_extensions.ConstraintSet[never]
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reveal_type(is_assignable_to(U, Super))
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static_assert(not is_assignable_to(U, Super))
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# revealed: ty_extensions.ConstraintSet[never]
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reveal_type(is_assignable_to(T, U))
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static_assert(not is_assignable_to(T, U))
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# revealed: ty_extensions.ConstraintSet[never]
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reveal_type(is_assignable_to(U, T))
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static_assert(not is_assignable_to(U, T))
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# revealed: ty_extensions.ConstraintSet[always]
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reveal_type(is_subtype_of(T, T))
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static_assert(is_subtype_of(T, T))
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# revealed: ty_extensions.ConstraintSet[always]
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reveal_type(is_subtype_of(T, object))
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static_assert(is_subtype_of(T, object))
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# revealed: ty_extensions.ConstraintSet[never]
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reveal_type(is_subtype_of(T, Super))
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static_assert(not is_subtype_of(T, Super))
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# revealed: ty_extensions.ConstraintSet[never]
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reveal_type(is_subtype_of(T, Any))
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static_assert(not is_subtype_of(T, Any))
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# revealed: ty_extensions.ConstraintSet[never]
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reveal_type(is_subtype_of(Any, T))
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static_assert(not is_subtype_of(Any, T))
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# revealed: ty_extensions.ConstraintSet[always]
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reveal_type(is_subtype_of(U, U))
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static_assert(is_subtype_of(U, U))
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# revealed: ty_extensions.ConstraintSet[always]
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reveal_type(is_subtype_of(U, object))
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static_assert(is_subtype_of(U, object))
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# revealed: ty_extensions.ConstraintSet[never]
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reveal_type(is_subtype_of(U, Super))
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static_assert(not is_subtype_of(U, Super))
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# revealed: ty_extensions.ConstraintSet[never]
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reveal_type(is_subtype_of(T, U))
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static_assert(not is_subtype_of(T, U))
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# revealed: ty_extensions.ConstraintSet[never]
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reveal_type(is_subtype_of(U, T))
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static_assert(not is_subtype_of(U, T))
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```
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A bounded typevar is assignable to its bound, and a bounded, fully static typevar is a subtype of
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@ -193,56 +231,100 @@ from typing_extensions import final
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def bounded[T: Super](t: T) -> None:
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# revealed: ty_extensions.ConstraintSet[all valid specializations: (T@bounded ≤ Super)]
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reveal_type(is_assignable_to(T, Any))
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static_assert(is_assignable_to(T, Any))
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# revealed: ty_extensions.ConstraintSet[all valid specializations: (T@bounded ≤ Super)]
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reveal_type(is_assignable_to(Any, T))
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static_assert(is_assignable_to(Any, T))
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# revealed: ty_extensions.ConstraintSet[all valid specializations: (T@bounded ≤ Super)]
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reveal_type(is_assignable_to(T, Super))
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static_assert(is_assignable_to(T, Super))
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# revealed: ty_extensions.ConstraintSet[never]
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reveal_type(is_assignable_to(T, Sub))
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static_assert(not is_assignable_to(T, Sub))
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# revealed: ty_extensions.ConstraintSet[never]
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reveal_type(is_assignable_to(Super, T))
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static_assert(not is_assignable_to(Super, T))
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# revealed: ty_extensions.ConstraintSet[never]
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reveal_type(is_assignable_to(Sub, T))
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static_assert(not is_assignable_to(Sub, T))
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# revealed: ty_extensions.ConstraintSet[never]
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reveal_type(is_subtype_of(T, Any))
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static_assert(not is_subtype_of(T, Any))
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# revealed: ty_extensions.ConstraintSet[never]
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reveal_type(is_subtype_of(Any, T))
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static_assert(not is_subtype_of(Any, T))
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# revealed: ty_extensions.ConstraintSet[all valid specializations: (T@bounded ≤ Super)]
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reveal_type(is_subtype_of(T, Super))
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static_assert(is_subtype_of(T, Super))
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# revealed: ty_extensions.ConstraintSet[never]
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reveal_type(is_subtype_of(T, Sub))
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static_assert(not is_subtype_of(T, Sub))
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# revealed: ty_extensions.ConstraintSet[never]
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reveal_type(is_subtype_of(Super, T))
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static_assert(not is_subtype_of(Super, T))
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# revealed: ty_extensions.ConstraintSet[never]
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reveal_type(is_subtype_of(Sub, T))
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static_assert(not is_subtype_of(Sub, T))
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def bounded_by_gradual[T: Any](t: T) -> None:
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# revealed: ty_extensions.ConstraintSet[always]
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reveal_type(is_assignable_to(T, Any))
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static_assert(is_assignable_to(T, Any))
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# revealed: ty_extensions.ConstraintSet[always]
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reveal_type(is_assignable_to(Any, T))
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static_assert(is_assignable_to(Any, T))
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# revealed: ty_extensions.ConstraintSet[always]
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reveal_type(is_assignable_to(T, Super))
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static_assert(is_assignable_to(T, Super))
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# revealed: ty_extensions.ConstraintSet[never]
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reveal_type(is_assignable_to(Super, T))
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static_assert(not is_assignable_to(Super, T))
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# revealed: ty_extensions.ConstraintSet[always]
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reveal_type(is_assignable_to(T, Sub))
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static_assert(is_assignable_to(T, Sub))
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# revealed: ty_extensions.ConstraintSet[never]
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reveal_type(is_assignable_to(Sub, T))
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static_assert(not is_assignable_to(Sub, T))
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# revealed: ty_extensions.ConstraintSet[never]
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reveal_type(is_subtype_of(T, Any))
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static_assert(not is_subtype_of(T, Any))
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# revealed: ty_extensions.ConstraintSet[never]
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reveal_type(is_subtype_of(Any, T))
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static_assert(not is_subtype_of(Any, T))
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# revealed: ty_extensions.ConstraintSet[never]
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reveal_type(is_subtype_of(T, Super))
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static_assert(not is_subtype_of(T, Super))
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# revealed: ty_extensions.ConstraintSet[never]
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reveal_type(is_subtype_of(Super, T))
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static_assert(not is_subtype_of(Super, T))
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# revealed: ty_extensions.ConstraintSet[never]
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reveal_type(is_subtype_of(T, Sub))
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static_assert(not is_subtype_of(T, Sub))
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# revealed: ty_extensions.ConstraintSet[never]
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reveal_type(is_subtype_of(Sub, T))
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static_assert(not is_subtype_of(Sub, T))
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@final
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class FinalClass: ...
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@ -250,21 +332,35 @@ class FinalClass: ...
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def bounded_final[T: FinalClass](t: T) -> None:
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# revealed: ty_extensions.ConstraintSet[all valid specializations: (T@bounded_final ≤ FinalClass)]
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reveal_type(is_assignable_to(T, Any))
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static_assert(is_assignable_to(T, Any))
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# revealed: ty_extensions.ConstraintSet[all valid specializations: (T@bounded_final ≤ FinalClass)]
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reveal_type(is_assignable_to(Any, T))
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static_assert(is_assignable_to(Any, T))
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# revealed: ty_extensions.ConstraintSet[all valid specializations: (T@bounded_final ≤ FinalClass)]
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reveal_type(is_assignable_to(T, FinalClass))
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static_assert(is_assignable_to(T, FinalClass))
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# revealed: ty_extensions.ConstraintSet[never]
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reveal_type(is_assignable_to(FinalClass, T))
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static_assert(not is_assignable_to(FinalClass, T))
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# revealed: ty_extensions.ConstraintSet[never]
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reveal_type(is_subtype_of(T, Any))
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static_assert(not is_subtype_of(T, Any))
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# revealed: ty_extensions.ConstraintSet[never]
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reveal_type(is_subtype_of(Any, T))
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static_assert(not is_subtype_of(Any, T))
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# revealed: ty_extensions.ConstraintSet[all valid specializations: (T@bounded_final ≤ FinalClass)]
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reveal_type(is_subtype_of(T, FinalClass))
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static_assert(is_subtype_of(T, FinalClass))
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# revealed: ty_extensions.ConstraintSet[never]
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reveal_type(is_subtype_of(FinalClass, T))
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static_assert(not is_subtype_of(FinalClass, T))
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```
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Two distinct fully static typevars are not subtypes of each other, even if they have the same
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@ -276,24 +372,36 @@ typevars to `Never` in addition to that final class.
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def two_bounded[T: Super, U: Super](t: T, u: U) -> None:
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# revealed: ty_extensions.ConstraintSet[never]
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reveal_type(is_assignable_to(T, U))
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static_assert(not is_assignable_to(T, U))
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# revealed: ty_extensions.ConstraintSet[never]
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reveal_type(is_assignable_to(U, T))
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static_assert(not is_assignable_to(U, T))
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# revealed: ty_extensions.ConstraintSet[never]
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reveal_type(is_subtype_of(T, U))
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static_assert(not is_subtype_of(T, U))
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# revealed: ty_extensions.ConstraintSet[never]
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reveal_type(is_subtype_of(U, T))
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static_assert(not is_subtype_of(U, T))
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def two_final_bounded[T: FinalClass, U: FinalClass](t: T, u: U) -> None:
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# revealed: ty_extensions.ConstraintSet[never]
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reveal_type(is_assignable_to(T, U))
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static_assert(not is_assignable_to(T, U))
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# revealed: ty_extensions.ConstraintSet[never]
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reveal_type(is_assignable_to(U, T))
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static_assert(not is_assignable_to(U, T))
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# revealed: ty_extensions.ConstraintSet[never]
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reveal_type(is_subtype_of(T, U))
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static_assert(not is_subtype_of(T, U))
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# revealed: ty_extensions.ConstraintSet[never]
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reveal_type(is_subtype_of(U, T))
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static_assert(not is_subtype_of(U, T))
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```
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A constrained fully static typevar is assignable to the union of its constraints, but not to any of
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@ -306,124 +414,236 @@ from ty_extensions import Intersection
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def constrained[T: (Base, Unrelated)](t: T) -> None:
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# revealed: ty_extensions.ConstraintSet[some valid specializations: (T@constrained = Base)]
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reveal_type(is_assignable_to(T, Super))
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static_assert(not is_assignable_to(T, Super))
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# revealed: ty_extensions.ConstraintSet[some valid specializations: (T@constrained = Base)]
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reveal_type(is_assignable_to(T, Base))
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static_assert(not is_assignable_to(T, Base))
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# revealed: ty_extensions.ConstraintSet[never]
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reveal_type(is_assignable_to(T, Sub))
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static_assert(not is_assignable_to(T, Sub))
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# revealed: ty_extensions.ConstraintSet[some valid specializations: (T@constrained = Unrelated)]
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reveal_type(is_assignable_to(T, Unrelated))
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static_assert(not is_assignable_to(T, Unrelated))
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# revealed: ty_extensions.ConstraintSet[all valid specializations: (T@constrained = Base) ∨ (T@constrained = Unrelated)]
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reveal_type(is_assignable_to(T, Any))
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static_assert(is_assignable_to(T, Any))
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# revealed: ty_extensions.ConstraintSet[all valid specializations: (T@constrained = Base) ∨ (T@constrained = Unrelated)]
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reveal_type(is_assignable_to(T, Super | Unrelated))
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static_assert(is_assignable_to(T, Super | Unrelated))
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# revealed: ty_extensions.ConstraintSet[all valid specializations: (T@constrained = Base) ∨ (T@constrained = Unrelated)]
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reveal_type(is_assignable_to(T, Base | Unrelated))
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static_assert(is_assignable_to(T, Base | Unrelated))
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# revealed: ty_extensions.ConstraintSet[some valid specializations: (T@constrained = Unrelated)]
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reveal_type(is_assignable_to(T, Sub | Unrelated))
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static_assert(not is_assignable_to(T, Sub | Unrelated))
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# revealed: ty_extensions.ConstraintSet[all valid specializations: (T@constrained = Base) ∨ (T@constrained = Unrelated)]
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reveal_type(is_assignable_to(Any, T))
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static_assert(is_assignable_to(Any, T))
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# revealed: ty_extensions.ConstraintSet[never]
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reveal_type(is_assignable_to(Super, T))
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static_assert(not is_assignable_to(Super, T))
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# revealed: ty_extensions.ConstraintSet[some valid specializations: (T@constrained = Unrelated)]
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reveal_type(is_assignable_to(Unrelated, T))
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static_assert(not is_assignable_to(Unrelated, T))
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# revealed: ty_extensions.ConstraintSet[never]
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reveal_type(is_assignable_to(Super | Unrelated, T))
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static_assert(not is_assignable_to(Super | Unrelated, T))
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# revealed: ty_extensions.ConstraintSet[all valid specializations: (T@constrained = Base) ∨ (T@constrained = Unrelated)]
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reveal_type(is_assignable_to(Intersection[Base, Unrelated], T))
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static_assert(is_assignable_to(Intersection[Base, Unrelated], T))
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# revealed: ty_extensions.ConstraintSet[some valid specializations: (T@constrained = Base)]
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reveal_type(is_subtype_of(T, Super))
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static_assert(not is_subtype_of(T, Super))
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# revealed: ty_extensions.ConstraintSet[some valid specializations: (T@constrained = Base)]
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reveal_type(is_subtype_of(T, Base))
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static_assert(not is_subtype_of(T, Base))
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# revealed: ty_extensions.ConstraintSet[never]
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reveal_type(is_subtype_of(T, Sub))
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static_assert(not is_subtype_of(T, Sub))
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# revealed: ty_extensions.ConstraintSet[some valid specializations: (T@constrained = Unrelated)]
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reveal_type(is_subtype_of(T, Unrelated))
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static_assert(not is_subtype_of(T, Unrelated))
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# revealed: ty_extensions.ConstraintSet[never]
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reveal_type(is_subtype_of(T, Any))
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static_assert(not is_subtype_of(T, Any))
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# revealed: ty_extensions.ConstraintSet[all valid specializations: (T@constrained = Base) ∨ (T@constrained = Unrelated)]
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reveal_type(is_subtype_of(T, Super | Unrelated))
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static_assert(is_subtype_of(T, Super | Unrelated))
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# revealed: ty_extensions.ConstraintSet[all valid specializations: (T@constrained = Base) ∨ (T@constrained = Unrelated)]
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reveal_type(is_subtype_of(T, Base | Unrelated))
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static_assert(is_subtype_of(T, Base | Unrelated))
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# revealed: ty_extensions.ConstraintSet[some valid specializations: (T@constrained = Unrelated)]
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reveal_type(is_subtype_of(T, Sub | Unrelated))
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static_assert(not is_subtype_of(T, Sub | Unrelated))
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# revealed: ty_extensions.ConstraintSet[never]
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reveal_type(is_subtype_of(Any, T))
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static_assert(not is_subtype_of(Any, T))
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# revealed: ty_extensions.ConstraintSet[never]
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reveal_type(is_subtype_of(Super, T))
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static_assert(not is_subtype_of(Super, T))
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# revealed: ty_extensions.ConstraintSet[some valid specializations: (T@constrained = Unrelated)]
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reveal_type(is_subtype_of(Unrelated, T))
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static_assert(not is_subtype_of(Unrelated, T))
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# revealed: ty_extensions.ConstraintSet[never]
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reveal_type(is_subtype_of(Super | Unrelated, T))
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static_assert(not is_subtype_of(Super | Unrelated, T))
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# revealed: ty_extensions.ConstraintSet[all valid specializations: (T@constrained = Base) ∨ (T@constrained = Unrelated)]
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reveal_type(is_subtype_of(Intersection[Base, Unrelated], T))
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static_assert(is_subtype_of(Intersection[Base, Unrelated], T))
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def constrained_by_gradual[T: (Base, Any)](t: T) -> None:
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# revealed: ty_extensions.ConstraintSet[always]
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reveal_type(is_assignable_to(T, Super))
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static_assert(is_assignable_to(T, Super))
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# revealed: ty_extensions.ConstraintSet[always]
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reveal_type(is_assignable_to(T, Base))
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static_assert(is_assignable_to(T, Base))
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# revealed: ty_extensions.ConstraintSet[some valid specializations: (T@constrained_by_gradual ≠ Base)]
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reveal_type(is_assignable_to(T, Sub))
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static_assert(not is_assignable_to(T, Sub))
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|
||||
# revealed: ty_extensions.ConstraintSet[some valid specializations: (T@constrained_by_gradual ≠ Base)]
|
||||
reveal_type(is_assignable_to(T, Unrelated))
|
||||
static_assert(not is_assignable_to(T, Unrelated))
|
||||
|
||||
# revealed: ty_extensions.ConstraintSet[always]
|
||||
reveal_type(is_assignable_to(T, Any))
|
||||
static_assert(is_assignable_to(T, Any))
|
||||
|
||||
# revealed: ty_extensions.ConstraintSet[always]
|
||||
reveal_type(is_assignable_to(T, Super | Any))
|
||||
static_assert(is_assignable_to(T, Super | Any))
|
||||
|
||||
# revealed: ty_extensions.ConstraintSet[always]
|
||||
reveal_type(is_assignable_to(T, Super | Unrelated))
|
||||
static_assert(is_assignable_to(T, Super | Unrelated))
|
||||
|
||||
# revealed: ty_extensions.ConstraintSet[some valid specializations: (T@constrained_by_gradual ≠ Base)]
|
||||
reveal_type(is_assignable_to(Super, T))
|
||||
static_assert(not is_assignable_to(Super, T))
|
||||
|
||||
# revealed: ty_extensions.ConstraintSet[always]
|
||||
reveal_type(is_assignable_to(Base, T))
|
||||
static_assert(is_assignable_to(Base, T))
|
||||
|
||||
# revealed: ty_extensions.ConstraintSet[some valid specializations: (T@constrained_by_gradual ≠ Base)]
|
||||
reveal_type(is_assignable_to(Unrelated, T))
|
||||
static_assert(not is_assignable_to(Unrelated, T))
|
||||
|
||||
# revealed: ty_extensions.ConstraintSet[always]
|
||||
reveal_type(is_assignable_to(Any, T))
|
||||
static_assert(is_assignable_to(Any, T))
|
||||
|
||||
# revealed: ty_extensions.ConstraintSet[some valid specializations: (T@constrained_by_gradual ≠ Base)]
|
||||
reveal_type(is_assignable_to(Super | Any, T))
|
||||
static_assert(not is_assignable_to(Super | Any, T))
|
||||
|
||||
# revealed: ty_extensions.ConstraintSet[always]
|
||||
reveal_type(is_assignable_to(Base | Any, T))
|
||||
static_assert(is_assignable_to(Base | Any, T))
|
||||
|
||||
# revealed: ty_extensions.ConstraintSet[some valid specializations: (T@constrained_by_gradual ≠ Base)]
|
||||
reveal_type(is_assignable_to(Super | Unrelated, T))
|
||||
static_assert(not is_assignable_to(Super | Unrelated, T))
|
||||
|
||||
# revealed: ty_extensions.ConstraintSet[always]
|
||||
reveal_type(is_assignable_to(Intersection[Base, Unrelated], T))
|
||||
static_assert(is_assignable_to(Intersection[Base, Unrelated], T))
|
||||
|
||||
# revealed: ty_extensions.ConstraintSet[always]
|
||||
reveal_type(is_assignable_to(Intersection[Base, Any], T))
|
||||
static_assert(is_assignable_to(Intersection[Base, Any], T))
|
||||
|
||||
# revealed: ty_extensions.ConstraintSet[never]
|
||||
reveal_type(is_subtype_of(T, Super))
|
||||
static_assert(not is_subtype_of(T, Super))
|
||||
|
||||
# revealed: ty_extensions.ConstraintSet[never]
|
||||
reveal_type(is_subtype_of(T, Base))
|
||||
static_assert(not is_subtype_of(T, Base))
|
||||
|
||||
# revealed: ty_extensions.ConstraintSet[never]
|
||||
reveal_type(is_subtype_of(T, Sub))
|
||||
static_assert(not is_subtype_of(T, Sub))
|
||||
|
||||
# revealed: ty_extensions.ConstraintSet[never]
|
||||
reveal_type(is_subtype_of(T, Unrelated))
|
||||
static_assert(not is_subtype_of(T, Unrelated))
|
||||
|
||||
# revealed: ty_extensions.ConstraintSet[never]
|
||||
reveal_type(is_subtype_of(T, Any))
|
||||
static_assert(not is_subtype_of(T, Any))
|
||||
|
||||
# revealed: ty_extensions.ConstraintSet[never]
|
||||
reveal_type(is_subtype_of(T, Super | Any))
|
||||
static_assert(not is_subtype_of(T, Super | Any))
|
||||
|
||||
# revealed: ty_extensions.ConstraintSet[never]
|
||||
reveal_type(is_subtype_of(T, Super | Unrelated))
|
||||
static_assert(not is_subtype_of(T, Super | Unrelated))
|
||||
|
||||
# revealed: ty_extensions.ConstraintSet[never]
|
||||
reveal_type(is_subtype_of(Super, T))
|
||||
static_assert(not is_subtype_of(Super, T))
|
||||
|
||||
# revealed: ty_extensions.ConstraintSet[never]
|
||||
reveal_type(is_subtype_of(Base, T))
|
||||
static_assert(not is_subtype_of(Base, T))
|
||||
|
||||
# revealed: ty_extensions.ConstraintSet[never]
|
||||
reveal_type(is_subtype_of(Unrelated, T))
|
||||
static_assert(not is_subtype_of(Unrelated, T))
|
||||
|
||||
# revealed: ty_extensions.ConstraintSet[never]
|
||||
reveal_type(is_subtype_of(Any, T))
|
||||
static_assert(not is_subtype_of(Any, T))
|
||||
|
||||
# revealed: ty_extensions.ConstraintSet[never]
|
||||
reveal_type(is_subtype_of(Super | Any, T))
|
||||
static_assert(not is_subtype_of(Super | Any, T))
|
||||
|
||||
# revealed: ty_extensions.ConstraintSet[never]
|
||||
reveal_type(is_subtype_of(Base | Any, T))
|
||||
static_assert(not is_subtype_of(Base | Any, T))
|
||||
|
||||
# revealed: ty_extensions.ConstraintSet[never]
|
||||
reveal_type(is_subtype_of(Super | Unrelated, T))
|
||||
static_assert(not is_subtype_of(Super | Unrelated, T))
|
||||
|
||||
# revealed: ty_extensions.ConstraintSet[never]
|
||||
reveal_type(is_subtype_of(Intersection[Base, Unrelated], T))
|
||||
static_assert(not is_subtype_of(Intersection[Base, Unrelated], T))
|
||||
|
||||
# revealed: ty_extensions.ConstraintSet[never]
|
||||
reveal_type(is_subtype_of(Intersection[Base, Any], T))
|
||||
static_assert(not is_subtype_of(Intersection[Base, Any], T))
|
||||
```
|
||||
|
||||
Two distinct fully static typevars are not subtypes of each other, even if they have the same
|
||||
|
|
@ -435,13 +655,19 @@ the same type.
|
|||
def two_constrained[T: (int, str), U: (int, str)](t: T, u: U) -> None:
|
||||
# revealed: ty_extensions.ConstraintSet[some valid specializations: ((T@two_constrained = str) ∧ (U@two_constrained = str)) ∨ ((T@two_constrained = int) ∧ (U@two_constrained = int))]
|
||||
reveal_type(is_assignable_to(T, U))
|
||||
static_assert(not is_assignable_to(T, U))
|
||||
|
||||
# revealed: ty_extensions.ConstraintSet[some valid specializations: ((U@two_constrained = str) ∧ (T@two_constrained = str)) ∨ ((U@two_constrained = int) ∧ (T@two_constrained = int))]
|
||||
reveal_type(is_assignable_to(U, T))
|
||||
static_assert(not is_assignable_to(U, T))
|
||||
|
||||
# revealed: ty_extensions.ConstraintSet[some valid specializations: ((T@two_constrained = str) ∧ (U@two_constrained = str)) ∨ ((T@two_constrained = int) ∧ (U@two_constrained = int))]
|
||||
reveal_type(is_subtype_of(T, U))
|
||||
static_assert(not is_subtype_of(T, U))
|
||||
|
||||
# revealed: ty_extensions.ConstraintSet[some valid specializations: ((U@two_constrained = str) ∧ (T@two_constrained = str)) ∨ ((U@two_constrained = int) ∧ (T@two_constrained = int))]
|
||||
reveal_type(is_subtype_of(U, T))
|
||||
static_assert(not is_subtype_of(U, T))
|
||||
|
||||
@final
|
||||
class AnotherFinalClass: ...
|
||||
|
|
@ -449,13 +675,19 @@ class AnotherFinalClass: ...
|
|||
def two_final_constrained[T: (FinalClass, AnotherFinalClass), U: (FinalClass, AnotherFinalClass)](t: T, u: U) -> None:
|
||||
# revealed: ty_extensions.ConstraintSet[some valid specializations: ((T@two_final_constrained = AnotherFinalClass) ∧ (U@two_final_constrained = AnotherFinalClass)) ∨ ((T@two_final_constrained = FinalClass) ∧ (U@two_final_constrained = FinalClass))]
|
||||
reveal_type(is_assignable_to(T, U))
|
||||
static_assert(not is_assignable_to(T, U))
|
||||
|
||||
# revealed: ty_extensions.ConstraintSet[some valid specializations: ((U@two_final_constrained = AnotherFinalClass) ∧ (T@two_final_constrained = AnotherFinalClass)) ∨ ((U@two_final_constrained = FinalClass) ∧ (T@two_final_constrained = FinalClass))]
|
||||
reveal_type(is_assignable_to(U, T))
|
||||
static_assert(not is_assignable_to(U, T))
|
||||
|
||||
# revealed: ty_extensions.ConstraintSet[some valid specializations: ((T@two_final_constrained = AnotherFinalClass) ∧ (U@two_final_constrained = AnotherFinalClass)) ∨ ((T@two_final_constrained = FinalClass) ∧ (U@two_final_constrained = FinalClass))]
|
||||
reveal_type(is_subtype_of(T, U))
|
||||
static_assert(not is_subtype_of(T, U))
|
||||
|
||||
# revealed: ty_extensions.ConstraintSet[some valid specializations: ((U@two_final_constrained = AnotherFinalClass) ∧ (T@two_final_constrained = AnotherFinalClass)) ∨ ((U@two_final_constrained = FinalClass) ∧ (T@two_final_constrained = FinalClass))]
|
||||
reveal_type(is_subtype_of(U, T))
|
||||
static_assert(not is_subtype_of(U, T))
|
||||
```
|
||||
|
||||
A bound or constrained typevar is a subtype of itself in a union:
|
||||
|
|
@ -464,13 +696,19 @@ A bound or constrained typevar is a subtype of itself in a union:
|
|||
def union[T: Base, U: (Base, Unrelated)](t: T, u: U) -> None:
|
||||
# revealed: ty_extensions.ConstraintSet[all valid specializations: (T@union ≤ Base)]
|
||||
reveal_type(is_assignable_to(T, T | None))
|
||||
static_assert(is_assignable_to(T, T | None))
|
||||
|
||||
# revealed: ty_extensions.ConstraintSet[all valid specializations: (U@union = Base) ∨ (U@union = Unrelated)]
|
||||
reveal_type(is_assignable_to(U, U | None))
|
||||
static_assert(is_assignable_to(U, U | None))
|
||||
|
||||
# revealed: ty_extensions.ConstraintSet[all valid specializations: (T@union ≤ Base)]
|
||||
reveal_type(is_subtype_of(T, T | None))
|
||||
static_assert(is_subtype_of(T, T | None))
|
||||
|
||||
# revealed: ty_extensions.ConstraintSet[all valid specializations: (U@union = Base) ∨ (U@union = Unrelated)]
|
||||
reveal_type(is_subtype_of(U, U | None))
|
||||
static_assert(is_subtype_of(U, U | None))
|
||||
```
|
||||
|
||||
A bound or constrained typevar in a union with a dynamic type is assignable to the typevar:
|
||||
|
|
@ -479,32 +717,44 @@ A bound or constrained typevar in a union with a dynamic type is assignable to t
|
|||
def union_with_dynamic[T: Base, U: (Base, Unrelated)](t: T, u: U) -> None:
|
||||
# revealed: ty_extensions.ConstraintSet[all valid specializations: (T@union_with_dynamic ≤ Base)]
|
||||
reveal_type(is_assignable_to(T | Any, T))
|
||||
static_assert(is_assignable_to(T | Any, T))
|
||||
|
||||
# revealed: ty_extensions.ConstraintSet[all valid specializations: (U@union_with_dynamic = Base) ∨ (U@union_with_dynamic = Unrelated)]
|
||||
reveal_type(is_assignable_to(U | Any, U))
|
||||
static_assert(is_assignable_to(U | Any, U))
|
||||
|
||||
# revealed: ty_extensions.ConstraintSet[never]
|
||||
reveal_type(is_subtype_of(T | Any, T))
|
||||
static_assert(not is_subtype_of(T | Any, T))
|
||||
|
||||
# revealed: ty_extensions.ConstraintSet[never]
|
||||
reveal_type(is_subtype_of(U | Any, U))
|
||||
static_assert(not is_subtype_of(U | Any, U))
|
||||
```
|
||||
|
||||
And an intersection of a typevar with another type is always a subtype of the TypeVar:
|
||||
|
||||
```py
|
||||
from ty_extensions import Intersection, Not, is_disjoint_from, static_assert
|
||||
from ty_extensions import Intersection, Not, is_disjoint_from
|
||||
|
||||
class A: ...
|
||||
|
||||
def inter[T: Base, U: (Base, Unrelated)](t: T, u: U) -> None:
|
||||
# revealed: ty_extensions.ConstraintSet[all valid specializations: (T@inter ≤ Base)]
|
||||
reveal_type(is_assignable_to(Intersection[T, Unrelated], T))
|
||||
static_assert(is_assignable_to(Intersection[T, Unrelated], T))
|
||||
|
||||
# revealed: ty_extensions.ConstraintSet[all valid specializations: (T@inter ≤ Base)]
|
||||
reveal_type(is_subtype_of(Intersection[T, Unrelated], T))
|
||||
static_assert(is_subtype_of(Intersection[T, Unrelated], T))
|
||||
|
||||
# revealed: ty_extensions.ConstraintSet[all valid specializations: (U@inter = Base) ∨ (U@inter = Unrelated)]
|
||||
reveal_type(is_assignable_to(Intersection[U, A], U))
|
||||
static_assert(is_assignable_to(Intersection[U, A], U))
|
||||
|
||||
# revealed: ty_extensions.ConstraintSet[all valid specializations: (U@inter = Base) ∨ (U@inter = Unrelated)]
|
||||
reveal_type(is_subtype_of(Intersection[U, A], U))
|
||||
static_assert(is_subtype_of(Intersection[U, A], U))
|
||||
|
||||
static_assert(is_disjoint_from(Not[T], T))
|
||||
static_assert(is_disjoint_from(T, Not[T]))
|
||||
|
|
@ -801,18 +1051,24 @@ The intersection of a typevar with any other type is assignable to (and if fully
|
|||
of) itself.
|
||||
|
||||
```py
|
||||
from ty_extensions import is_assignable_to, is_subtype_of, Not
|
||||
from ty_extensions import is_assignable_to, is_subtype_of, Not, static_assert
|
||||
|
||||
def intersection_is_assignable[T](t: T) -> None:
|
||||
# revealed: ty_extensions.ConstraintSet[always]
|
||||
reveal_type(is_assignable_to(Intersection[T, None], T))
|
||||
static_assert(is_assignable_to(Intersection[T, None], T))
|
||||
|
||||
# revealed: ty_extensions.ConstraintSet[always]
|
||||
reveal_type(is_assignable_to(Intersection[T, Not[None]], T))
|
||||
static_assert(is_assignable_to(Intersection[T, Not[None]], T))
|
||||
|
||||
# revealed: ty_extensions.ConstraintSet[always]
|
||||
reveal_type(is_subtype_of(Intersection[T, None], T))
|
||||
static_assert(is_subtype_of(Intersection[T, None], T))
|
||||
|
||||
# revealed: ty_extensions.ConstraintSet[always]
|
||||
reveal_type(is_subtype_of(Intersection[T, Not[None]], T))
|
||||
static_assert(is_subtype_of(Intersection[T, Not[None]], T))
|
||||
```
|
||||
|
||||
## Narrowing
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue