// Expressions Visitor
object Expr.Visitor <object> .visitAssignExpr(Assign expr)
{
Object value = evaluate(expr.value);
int outDistance;
var found = locals.TryGetValue(expr, out outDistance);
int distance = found ? outDistance : 0;
if (locals.ContainsKey(expr))
{
environment.assignAt(distance, expr.name, value);
}
else
{
globals.assign(expr.name, value);
}
return(value);
}
