Function is_in_nested_frame

src/diagnostics/unused_variables.rs:469–477

Check whether `offset` falls inside any nested frame (closure, arrow function, or catch) within the given parent frame.

(
    offset: u32,
    parent: &crate::scope_collector::Frame,
    frames: &[crate::scope_collector::Frame],
)

/// Check whether `offset` falls inside any nested frame (closure,
/// arrow function, or catch) within the given parent frame.
fn is_in_nested_frame(
    offset: u32,
    parent: &crate::scope_collector::Frame,
    frames: &[crate::scope_collector::Frame],
) -> bool {
    frames.iter().any(|f| {
        f.start > parent.start && f.end < parent.end && offset >= f.start && offset <= f.end
    })
}

/// Check whether a write access at `offset` for variable `name` is
/// actually a parameter declaration of a nested closure or arrow