Method cmp

crates/vm/src/builtins/range.rs:499–524

(
        zelf: &Py<Self>,
        other: &PyObject,
        op: PyComparisonOp,
        _vm: &VirtualMachine,
    )

impl Comparable for PyRange {
    fn cmp(
        zelf: &Py<Self>,
        other: &PyObject,
        op: PyComparisonOp,
        _vm: &VirtualMachine,
    ) -> PyResult<PyComparisonValue> {
        op.eq_only(|| {
            if zelf.is(other) {
                return Ok(true.into());
            }
            let rhs = class_or_notimplemented!(Self, other);
            let lhs_len = zelf.compute_length();
            let eq = if lhs_len != rhs.compute_length() {
                false
            } else if lhs_len.is_zero() {
                true
            } else if zelf.start.as_bigint() != rhs.start.as_bigint() {
                false
            } else if lhs_len.is_one() {
                true
            } else {
                zelf.step.as_bigint() == rhs.step.as_bigint()
            };
            Ok(eq.into())
        })
    }
}

impl Iterable for PyRange {