/// Low-level operations that get translated directly into e.g. LLVM instructions.
/// These are always wrapped when exposed to end users, and can only make it
/// into an Expr when added directly by can::builtins
#[derive(Debug, Copy, Clone, PartialEq, Eq)]
pub enum LowLevel {
    /// List.len
    ListLen,
    Eq,
    NotEq,
    And,
    Or,
    Not,
}