ess-mode; suggestion for ess-eval-line-and-next-line

[Martin Maechler]

>>>>> "MM" == Martin Maechler <maechler at stat.math.ethz.ch> writes:
(just half an hour ago):

      <....>


    Rich> Change the current function so that it does send over
    Rich> blank lines.
    MM> not yet done.

    MM> Reason : All(!) eval-..-.. functions use the basic building block
    MM> (ess-eval-visibly ...)  {the name of which is ridiculous since that
    MM> function has an argument INVISIBLY which toggles if the evaluation
    MM> is visible or invisible ....}

    MM> and it is currently builtin inside this basic building block that
    MM> blank lines are somehow not sent at all.

{after investigating for a while}
the above is *not* true:

 C-u C-c C-r {= ess-eval-region <<VISIBLY>> }}

clearly shows empty lines in the output, i.e., they are properly sent and
everything.   As a matter of fact, even

C-c C-r {= ess-eval-region <<invisibly>> }}
    *does* send the empty lines <<invisibly>> and you only recognize this
    by one additional "> "  in the *R* buffer ..

    MM> __Before__ you start -- I am currently looking at hacking
    MM> ess-eval-visibly and make it provide "send-empty-lines as well" ...

So, it's a bit more complicated insofar as it is *NOT* (alone)
ess-eval-visibly's fault when
C-c C-n  really does *not* send empty lines...

ESS-core :  I do commit now what I have (mentioned in the last email).
	 If anyone else wants to add Rich's feature, please go ahead.

Martin
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