c64_assembler/memory/
user_count.rs

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/// Trait for user counts of objects.
pub trait UserCount {
    /// Add a user
    fn user_increase(&mut self);

    /// How many users have been registered
    fn user_count(&self) -> usize;

    /// Are there any users registered
    fn user_empty(&self) -> bool {
        self.user_count() == 0
    }
}