1use crate::interpreter::evaluator::Evaluator; 2 3pub fn std_sign(_: &mut Evaluator, x: f64) -> f64 { 4 if x > 0.0 { 5 1.0 6 } else if x < 0.0 { 7 -1.0 8 } else { 9 0.0 10 } 11}