use crate::*;

/// Implement [TryFrom<&Arc<RwLock<JackConnection>>>]: create app state from wrapped JACK handle.
#[macro_export] macro_rules! from_jack {
    (|$jack:ident|$Struct:ident$(<$($L:lifetime),*$($T:ident$(:$U:path)?),*>)? $cb:expr) => {
        impl $(<$($L),*$($T $(: $U)?),*>)? TryFrom<&Arc<RwLock<JackConnection>>> for $Struct $(<$($L),*$($T),*>)? {
            type Error = Box<dyn std::error::Error>;
            fn try_from ($jack: &Arc<RwLock<JackConnection>>) -> Usually<Self> {
                Ok($cb)
            }
        }
    };
}