Macro combu::action

macro_rules! action {
    (check_preset_flags,{$($t:tt)*}) => { ... };
    ($cmd:ident,$ctx:ident,check_preset_flags,{$($t:tt)*}) => { ... };
    ($cmd:ident,$ctx:ident,s,{$($t:tt)*}) => { ... };
    ($cmd:ident,$ctx:ident,base,{$($t:tt)*}) => { ... };
    ($cmd:ident,$ctx:ident,{$($t:tt)*}) => { ... };
    ($cmd:ident,$ctx:ident,core,{$($t:tt)*}) => { ... };
    ($($t:tt)*) => { ... };
}

Build helper for action