public override Continuation Evaluate(Continuation c, LexicalEnvironment env, Datum args)
{
var argList = args.ToArray();
if (argList.Length != 2)
{
throw c.error("Expected 2 arguments: (set! <symbol> <expression>). Got {0} instead", argList.Length);
}
var name = argList[0].CastSymbol();
var expression = argList[1];
c = c.PushTask(s =>
{
env.Set(name, s.Result);
return(s);
}, "set! '{0}'", name);
return(c.Evaluate(env, expression));
}
