public object visitGetExpr(Expr.Get expr)
{
object obj = Evaluate(expr.obj);
if (obj is Instance)
{
return(((Instance)obj).Get(expr.name));
}
throw new RuntimeError(expr.name, "Only instances have properties.");
}
private Expr Call()
{
Expr expr = Primary();
while (true)
{
if (Match(TokenType.LEFT_PAREN))
{
expr = FinishCall(expr);
}
else if (Match(TokenType.DOT))
{
Token name = Consume(TokenType.IDENTIFIER, "Expect property name after '.'.");
expr = new Expr.Get(expr, name);
}
else
{
break;
}
}
return(expr);
}
public Void visitGetExpr(Expr.Get expr)
{
Resolve(expr.obj);
return(null);
}