public object Visit(GetExpr expr)
{
var evaluatedValue = Evaluate(expr.Instance);
if (evaluatedValue is LoxInstance instance)
{
return(instance.Get(expr.Name));
}
throw new LoxRuntimeErrorException(expr.Name, "Only Lox class instances can have properties.");
}
Expr CallExpression()
{
var expr = Primary();
while (true)
{
if (MatchNext(TokenType.LeftParen))
{
expr = FinishCallExpression(expr);
}
else if (MatchNext(TokenType.Dot))
{
var name = Consume(TokenType.Identifier, "Expected a property identifier after '.'.");
expr = new GetExpr(expr, name);
}
else
{
break;
}
}
return(expr);
}