Function is_catch_frame_parameter

src/diagnostics/unused_variables.rs:452–465

Check whether a variable at the given offset is a catch frame's parameter declaration within the given parent frame.

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

/// Check whether a variable at the given offset is a catch frame's
/// parameter declaration within the given parent frame.
fn is_catch_frame_parameter(
    name: &str,
    offset: u32,
    parent: &crate::scope_collector::Frame,
    frames: &[crate::scope_collector::Frame],
) -> bool {
    frames.iter().any(|f| {
        f.kind == FrameKind::Catch
            && f.start > parent.start
            && f.end < parent.end
            && f.parameters.iter().any(|p| p.as_str() == name)
            && offset < f.start
    })
}

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