Macro pulsar_backend::build_assignments_2_aux

source ยท 
macro_rules! build_assignments_2_aux {
    (@base $builder:expr;
     $dst_node:ident[$dst_port:expr] = ? $src_node:ident[$src_port:expr]) => { ... };
    (@base $builder:expr;
     $dst_node:ident[$dst_port:expr] =
        $guard:ident ?
        $src_node:ident[$src_port:expr]) => { ... };
    ($builder:expr;
     $($dst_node:ident[$dst_port:expr] =
         $($guard:ident)? ?
         $src_node:ident[$src_port:expr];)*) => { ... };
}