Function cedar_policy::eval_expression

pub fn eval_expression(
    request: &Request,
    entities: &Entities,
    expr: &Expression,
) -> Result<EvalResult, EvaluationError>

Evaluates an expression. If evaluation results in an error (e.g., attempting to access a non-existent Entity or Record, passing the wrong number of arguments to a function etc.), that error is returned as a String