wrc 0.4.2

A thread-safe weighted reference counting smart-pointer for Rust.
Documentation 
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pub trait Weight {
    /// Add weight to the existing weight value, with overflow checking.
    fn add_weight(&self, _: usize) -> Option<usize>;

    /// Subtract weight to the existing weight value, with overflow checking.
    fn drop_weight(&self, _: usize) -> Option<usize>;

    /// Get the weight of the value.
    fn get_weight(&self) -> usize;
}