function_compose

Macro compose

Source 
macro_rules! compose {
    ($fnLeft:ident,$isLeftFnAsync:ident,-> with_args($args:expr) $($others:tt)*) => { ... };
    ($fnLeft:ident,$isLeftFnAsync:ident,.provide($p1:expr) $($others:tt)*) => { ... };
    ($fLeft:ident,$isLeftFnAsync:ident,$fRight:ident, $isRightAsync:ident,  .provide($p:expr) $($others:tt)*) => { ... };
    ($fLeft:ident,$isLeftFnAsync:ident,$fRight:ident, $isRightAsync:ident,  ->  $($others:tt)*) => { ... };
    ($fLeft:ident,$isLeftFnAsync:ident,-> $fn:ident.provide($p:expr) $($others:tt)*) => { ... };
    ($fLeft:ident,$isLeftFnAsync:ident,-> $fn:ident.provide($p:expr) $($others:tt)*) => { ... };
    ($fLeft:ident,$isLeftFnAsync:ident,-> $fn:ident $($others:tt)*) => { ... };
    ($fn:ident $($others:tt)*) => { ... };
}