No. I fixed that, the NAMESPACE file now contains:
S3method("[[<-", mylist)
S3method("$<-", mylist)
It still does not work. I also created a print method (print.mylist) which did
work out of the box, regardless of being in the NAMESPACE file or not. Could it
be somehow in here (also in my NAMESPACE file):
exportPattern("^[[:alpha:]]+")
Or could it be that the type of quoting causes the problems? Like in the
NAMESPACE I used double quotes for function definition. Do I need single quotes
or back-ticks?
Or is there a package where I can look how others implemented this kind of
functionality?
Sören
> On 04.05.2015, at 16:17, Hadley Wickham <h.wick...@gmail.com> wrote:
>
> Did you export the S3 methods in the NAMESPACE?
>
> Hadley
>
> On Mon, May 4, 2015 at 7:52 AM, <soeren.vo...@posteo.ch> wrote:
>> Hello
>>
>> I tried to define replacement functions for the class "mylist". When I test
>> them in an active R session, they work -- however, when I put them into a
>> package, they don't. Why and how to fix?
>>
>>
>> make_my_list <- function( x, y ) {
>> return(structure(list(x, y, class="mylist")))
>> }
>> mylist <- make_my_list(1:4, letters[3:7])
>> mylist
>> mylist[['x']] <- 4:6
>> mylist
>> "[[<-" <- function(x, field, value) {
>> UseMethod('[[<-', x)
>> }
>> "[[<-.mylist" <- function(x, field, value) {
>> stop( "Do not assign." )
>> }
>> mylist[['x']] <- 1:10
>> mylist
>> mylist$y <- LETTERS[1:3]
>> mylist
>> "$<-" <- function(x, field, value) {
>> UseMethod('$<-', x)
>> }
>> "$<-.mylist" <- function(x, field, value) {
>> stop( "Do not assign." )
>> }
>> mylist$y <- LETTERS[10:15]
>>
>>
>> Thanks for help
>> Sören
>> ______________________________________________
>> R-devel@r-project.org mailing list
>> https://stat.ethz.ch/mailman/listinfo/r-devel
>
>
>
> --
> http://had.co.nz/
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