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use super::Index;

/// Sealed trait describing the subset (`i32` and `i64`) of [`Index`] that can be used
/// as offsets of variable-length Arrow arrays.
pub trait Offset: super::private::Sealed + Index {
    /// Whether it is `i32` (false) or `i64` (true).
    fn is_large() -> bool;
}

impl Offset for i32 {
    #[inline]
    fn is_large() -> bool {
        false
    }
}

impl Offset for i64 {
    #[inline]
    fn is_large() -> bool {
        true
    }
}