If you `source("test.R", keep.source=FALSE)`, you will see that the
> line number is not reported.
>
>
Not always.
I have code that uses sapply to call another function and all I get back is
the line of the sapply.
Useful but in the 21st century I do think I could get more aid from the
runtime and compiler to help me.
I am giving up.
In the short term I am giving yup on expecting line numbers (running with
anything other than options(error=NULL) is a pain for all sorts of
reasons) and in the medium term I am giving up on R.
It is sad. R is very powerful and I can say a lot with very little. But I
have been using it intensely for 3 years, written (and debugged) thousands
of lines of code. It is exactly what I need *but* the debugging facilities
are too primitive and the time gained in design and implementation is lost,
with interest, in debugging.
IMO R is very suitable for simple tasks that would be complex in other
languages. But once it gets complex in R, it is too hard.
I am not saying R is very bad - far from it. But for ambitious projects
it cannot compete without proper debugging facilities.
It may be that I am not good enough at programming - fair enough. But I am
what I am, and I have been beating my head against this for far too long.
Having large amounts of code in R that I use every day I am not running
away at high speed. But I am moving away.
If R gets modern debugging (lets say up to where gdb was in the early
1990s) I'll be back with a big smile on my face.
But I cannot dictate the priorities of the R maintainers, and I will not
try.
peace
Worik Stanton
Dunedin
New Zealand
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