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While implementing R's new 'altrep' functionality in the TERR engine, I discovered a bug in R's 'deferred_string' altrep object: it is not using the correct value of the 'OutDec' option when it expands a deferred_string. See the following example: R 3.5.1: (same results in R 3.6.0 devel engine built 10/5) > options(scipen=0, OutDec=".") > as.character(123.456) [1]...

Thanks for the report. The approach you outlines below should work -- I'll look into it. Best, luke On Mon, 8 Oct 2018, Michael Sannella wrote: > While implementing R's new 'altrep' functionality in the TERR engine, > I discovered a bug in R's 'deferred_string' altrep object: it is not > using the correct value of the 'OutDec' option when it expands a > deferred_string.? See the following example: > > R 3.5.1: (same results in R 3.6.0 devel engine built 10/5) > ? ? > options(scipen=0, OutDec=".") > ? ? >...

...s.character(100:1)) ## should return NA [1] -1 > issort(as.character(1:100+1L)) [1] NA issort(as.character(1:100)) should return NA, since the string vector "1","2",..."10",... is not sorted. I suspect that the problem is that the Is_sorted method for deferred_string is just calling the Is_sorted method for the source object 1:100 (which _is_ a sorted integer vector). It should probably just return NA for any source object. ~~ Michael Sannella [[alternative HTML version deleted]]