Function evaluate_comparison

crates/gitql-engine/src/engine_evaluator.rs:353–370

(
    env: &mut Environment,
    expr: &ComparisonExpr,
    titles: &[String],
    object: &Vec<Box<dyn Value>>,
)

}

fn evaluate_comparison(
    env: &mut Environment,
    expr: &ComparisonExpr,
    titles: &[String],
    object: &Vec<Box<dyn Value>>,
) -> Result<Box<dyn Value>, String> {
    let lhs = evaluate_expression(env, &expr.left, titles, object)?;
    let rhs = evaluate_expression(env, &expr.right, titles, object)?;
    match expr.operator {
        ComparisonOperator::Greater => lhs.gt_op(&rhs),
        ComparisonOperator::GreaterEqual => lhs.gte_op(&rhs),
        ComparisonOperator::Less => lhs.lt_op(&rhs),
        ComparisonOperator::LessEqual => lhs.lte_op(&rhs),
        ComparisonOperator::Equal => lhs.eq_op(&rhs),
        ComparisonOperator::NotEqual => lhs.bang_eq_op(&rhs),
        ComparisonOperator::NullSafeEqual => lhs.null_safe_eq_op(&rhs),
    }
}

fn evaluate_group_comparison(
    env: &mut Environment,