ruff/crates/red_knot_python_semantic/resources/mdtest/call/function.md

Call expression

Simple

def get_int() -> int:
    return 42

reveal_type(get_int())  # revealed: int

Async

async def get_int_async() -> int:
    return 42

# TODO: we don't yet support `types.CoroutineType`, should be generic `Coroutine[Any, Any, int]`
reveal_type(get_int_async())  # revealed: @Todo(generic types.CoroutineType)

Generic

def get_int[T]() -> int:
    return 42

reveal_type(get_int())  # revealed: int

Decorated

from typing import Callable

def foo() -> int:
    return 42

def decorator(func) -> Callable[[], int]:
    return foo

@decorator
def bar() -> str:
    return "bar"

# TODO: should reveal `int`, as the decorator replaces `bar` with `foo`
reveal_type(bar())  # revealed: @Todo(return type)

Invalid callable

nonsense = 123
x = nonsense()  # error: "Object of type `Literal[123]` is not callable"

Potentially unbound function

def _(flag: bool):
    if flag:
        def foo() -> int:
            return 42
    # error: [possibly-unresolved-reference]
    reveal_type(foo())  # revealed: int