public static Operative Vau(Environment env, Object formals, Object eformal, List expr)
{
if ((formals is Symbol && formals == eformal) ||
(formals is Pair p && eformal is Symbol && p.Contains(eformal)))
{
throw new ArgumentException("Formals contain eformal");
}
return(new Operative(env,
Applicatives.CopyEvaluationStructureImmutable(formals),
eformal,
expr.Select <Object>(Applicatives.CopyEvaluationStructureImmutable)));
}
public static Applicative Lambda(Environment env, Object formals, List exprs) => Applicatives.Wrap(Vau(env, formals, Ignore.Instance, exprs));
public static Object LetSafe(Environment environment, List bindings, List body) => LetRedirect(environment, Applicatives.StandartEnvironment(), bindings, body);