Macro swipl::term_putable

macro_rules! term_putable {
    (($self_:ident : $t:ty, $term_: ident) => $b: block) => { ... };
}

Easily implement TermPutable.

Example:

struct Foo {num: u64}

term_putable!{
    (self:Foo, term) => {
        // body returns nothing, but underlying code may raise an exception on the prolog engine.
        term.put(&self.num).unwrap_or(());
    }
}

fn do_something(term: &Term) -> PrologResult<()> {
    term.put(&Foo{num:42})?;
    Ok(())
}