53fa32a389
<!-- Thank you for contributing to Ruff! To help us out with reviewing, please consider the following: - Does this pull request include a summary of the change? (See below.) - Does this pull request include a descriptive title? - Does this pull request include references to any relevant issues? --> ## Summary - Remove `Type::Unbound` - Handle (potential) unboundness as a concept orthogonal to the type system (see new `Symbol` type) - Improve existing and add new diagnostics related to (potential) unboundness closes #13671 ## Test Plan - Update existing markdown-based tests - Add new tests for added/modified functionality
2.5 KiB
2.5 KiB
Augmented assignment
Basic
x = 3
x -= 1
reveal_type(x) # revealed: Literal[2]
x = 1.0
x /= 2
reveal_type(x) # revealed: float
Dunder methods
class C:
def __isub__(self, other: int) -> str:
return "Hello, world!"
x = C()
x -= 1
reveal_type(x) # revealed: str
class C:
def __iadd__(self, other: str) -> float:
return 1.0
x = C()
x += "Hello"
reveal_type(x) # revealed: float
Unsupported types
class C:
def __isub__(self, other: str) -> int:
return 42
x = C()
x -= 1
# TODO: should error, once operand type check is implemented
reveal_type(x) # revealed: int
Method union
def bool_instance() -> bool:
return True
flag = bool_instance()
class Foo:
if bool_instance():
def __iadd__(self, other: int) -> str:
return "Hello, world!"
else:
def __iadd__(self, other: int) -> int:
return 42
f = Foo()
f += 12
reveal_type(f) # revealed: str | int
Partially bound __iadd__
def bool_instance() -> bool:
return True
class Foo:
if bool_instance():
def __iadd__(self, other: str) -> int:
return 42
f = Foo()
# TODO: We should emit an `unsupported-operator` error here, possibly with the information
# that `Foo.__iadd__` may be unbound as additional context.
f += "Hello, world!"
reveal_type(f) # revealed: int
Partially bound with __add__
def bool_instance() -> bool:
return True
class Foo:
def __add__(self, other: str) -> str:
return "Hello, world!"
if bool_instance():
def __iadd__(self, other: str) -> int:
return 42
f = Foo()
f += "Hello, world!"
# TODO(charlie): This should be `int | str`, since `__iadd__` may be unbound.
reveal_type(f) # revealed: int
Partially bound target union
def bool_instance() -> bool:
return True
class Foo:
def __add__(self, other: int) -> str:
return "Hello, world!"
if bool_instance():
def __iadd__(self, other: int) -> int:
return 42
if bool_instance():
f = Foo()
else:
f = 42.0
f += 12
# TODO(charlie): This should be `str | int | float`
reveal_type(f) # revealed: @Todo
Target union
def bool_instance() -> bool:
return True
flag = bool_instance()
class Foo:
def __iadd__(self, other: int) -> str:
return "Hello, world!"
if flag:
f = Foo()
else:
f = 42.0
f += 12
# TODO(charlie): This should be `str | float`.
reveal_type(f) # revealed: @Todo