concepts.dm.crow.crow_expression_utils.crow_split_simple_bool

crow_split_simple_bool(expr, initial_negated=False)

If the expression is a simple Boolean expression (see is_simple_bool()), it returns the feature definition and a boolean indicating whether the expression is negated.

Parameters:

• expr (Expression) – the expression to be checked.

• initial_negated (bool, optional) – whether outer context of the feature expression is a negated function.

Returns:

a tuple of the feature application and a boolean indicating whether the expression is negated. The first element is None if the feature is not a simple Boolean feature application.

Return type:

Tuple[FunctionApplicationExpression | None, bool]