R devel - Mar 2017 - can we override "if" in R?

Hello,

I heard we can override almost everything in R. Is it possible to
override "if" keyword in R to evaluate my own object instead of a
logical value?

Thanks,
Da

You can. Perhaps needless to say, be careful with this.

? `if` <- function(...) FALSE
? if (TRUE) TRUE else FALSE
[1] FALSE

G.

On Sat, Mar 4, 2017 at 5:36 PM, Da Zheng <zhengda1936 at gmail.com>
wrote:
> Hello,
>
> I heard we can override almost everything in R. Is it possible to
> override "if" keyword in R to evaluate my own object instead of a
> logical value?
>
> Thanks,
> Da
>
> ______________________________________________
> R-devel at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-devel

Thanks.
Can I override it for a specific class?
I can do that for operators such as "!". For example, "!.fm"
works for
objects of the class "fm".
It seems I can't do the same for "if".

Best,
Da

On Sat, Mar 4, 2017 at 12:41 PM, G?bor Cs?rdi <csardi.gabor at gmail.com>
wrote:
> You can. Perhaps needless to say, be careful with this.
>
> ? `if` <- function(...) FALSE
> ? if (TRUE) TRUE else FALSE
> [1] FALSE
>
> G.
>
> On Sat, Mar 4, 2017 at 5:36 PM, Da Zheng <zhengda1936 at gmail.com>
wrote:
>> Hello,
>>
>> I heard we can override almost everything in R. Is it possible to
>> override "if" keyword in R to evaluate my own object instead
of a
>> logical value?
>>
>> Thanks,
>> Da
>>
>> ______________________________________________
>> R-devel at r-project.org mailing list
>> https://stat.ethz.ch/mailman/listinfo/r-devel