Macro over::try_obj

macro_rules! try_obj {
    { $( $field:expr => $inner:expr ),+ , } => { ... };
    { $( $field:expr => $inner:expr ),+ } => { ... };
}

Given a list of field to Value pairs, returns an Obj with the fields and values. Returns an OverResult instead of panicking on error. To create an empty Obj, use obj! as it will never fail.