Function assert_nested

src/selection_range.rs:1086–1102

Helper: assert every range in the chain is contained within its parent.

(ranges: &[Range])

    /// Helper: assert every range in the chain is contained within its parent.
    fn assert_nested(ranges: &[Range]) {
        for window in ranges.windows(2) {
            let inner = &window[0];
            let outer = &window[1];
            assert!(
                (inner.start.line > outer.start.line
                    || (inner.start.line == outer.start.line
                        && inner.start.character >= outer.start.character))
                    && (inner.end.line < outer.end.line
                        || (inner.end.line == outer.end.line
                            && inner.end.character <= outer.end.character)),
                "Inner range {:?} should be contained within outer range {:?}",
                inner,
                outer,
            );
        }
    }

    // ─── 1. Switch statement ────────────────────────────────────────────