Undefined

This module provides a singleton class Undefined and UndefinedType that represents an undefined value in the Kirin interpreter.

The Undefined class is a singleton that can be used to represent an undefined value in the interpreter. It is used to indicate that a value has not been set or is not available. This is used to distinguish between an undefined value and a Python None value.

Undefined = UndefinedType()

is_undefined(value: object) -> TypeIs[UndefinedType]

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def is_undefined(value: object) -> TypeIs[UndefinedType]:
    """Check if the given value is an instance of `UndefinedType`.

    Args:
        value (object): The value to check.

    Returns:
        bool: True if the value is an instance of `UndefinedType`, False otherwise.
    """
    return value is Undefined