On 18/03/2020 1:36 a.m., Jan Gorecki wrote:

> Dear R-devel,

>

> Is there anything that we can do to make output of those call more

> consistent? So the first one will return `c(1L, 2L)` rather than

> `1:2`. Note that it is not related to compact integer sequence

> introduced by altrep, it is reproducible on R 3.1.0 as well.

>

> substitute(v+x, list(x=c(1L,2L)))

> #v + 1:2

> substitute(v+x, list(x=c(0L,2L)))

> #v + c(0L, 2L)

>

That's purely the deparser (the returned value from substitute doesn't

contain a call to ":"), but it's not optional.

So the output is consistent, it's the printing that is inconsistent.

Duncan Murdoch

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