Method index_of

crates/vm/src/builtins/range.rs:131–137

(&self, value: &BigInt)

    #[inline]
    pub fn index_of(&self, value: &BigInt) -> Option<BigInt> {
        let step = self.step.as_bigint();
        match self.offset(value) {
            Some(ref offset) if offset.is_multiple_of(step) => Some((offset / step).abs()),
            Some(_) | None => None,
        }
    }

    #[inline]
    pub fn is_empty(&self) -> bool {