bevy_gauge 0.2.2

bevy_gauge - a flexible stats system for Bevy
Documentation 
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#[macro_export]
macro_rules! simple_generic_stat {
    ($struct_name:ident, $ty:ty) => {
        impl StatDerived for $struct_name<$ty> {
            fn from_stats(stats: &bevy_gauge::prelude::Stats) -> Self {
                let mut s = Self::default();
                s.update_from_stats(stats);
                s
            }

            fn should_update(&self, stats: &bevy_gauge::prelude::Stats) -> bool {
                stats
                    .get(concat!(stringify!($struct_name), "<", stringify!($ty), ">")) != self.0
            }

            fn update_from_stats(&mut self, stats: &bevy_gauge::prelude::Stats) {
                self.0 = stats
                    .get(concat!(stringify!($struct_name), "<", stringify!($ty), ">"));
            }

            fn is_valid(stats: &bevy_gauge::prelude::Stats) -> bool {
                stats
                    .get(concat!(stringify!($struct_name), "<", stringify!($ty), ">")) != 0.0
            }
        }
    };
}

#[macro_export]
macro_rules! simple_stat {
    ($struct_name:ident) => {
        impl bevy_gauge::prelude::StatDerived for $struct_name {
            fn should_update(&self, stats: &bevy_gauge::prelude::Stats) -> bool {
                stats
                    .get(stringify!($struct_name)) != self.0
            }

            fn update_from_stats(&mut self, stats: &bevy_gauge::prelude::Stats) {
                self.0 = stats
                    .get(stringify!($struct_name));
            }
        }
    };
}

#[macro_export]
macro_rules! requires {
    ( $( $key:expr ),* $(,)? ) => {{
        // Ensure that you bring the required traits into scope.
        use bevy_gauge::prelude::*;
        let mut vals = Vec::new();
        $(
            vals.push($key.into());
        )*
        StatRequirements(vals)
    }};
}