[ESS] ESS 15.09-beta: please try it before release!
maechler at stat.math.ethz.ch
Fri Sep 18 13:11:16 CEST 2015
Dear ESS users,
The ESS core team plans to release ESS 15.09 in a few days (probably Sept.23).
Those (daring ones) of you who work from the github or MELPA
development version of ESS are indeed beta-testing ESS 15.09
Others are kindly asked to try it, possibly most easily by getting one of the packaged beta versions (showing 'https' below; 'http' also works) :
and giving feedback either here or by opening "github issue" at
The biggest changes are in indentation behavior which has become
much more consistent and still more flexible,
notably thanks to our new team member
Lionel Henry (thank you, Lionel!)
Many other improvements / bug fixes have been incorporated since
the spring release 15.03. See below for the current documented
list of new features for 15.09.
For the ESS Core Team:
Martin Maechler, ETH Zurich
Changes and New Features in 15.09:
* ESS[R]: The indentation logic has been refactored. It should be
faster, more consistent and more flexible. A test framework has
been set up in order to prevent any regression on future code
change. Indentation offsets have been renamed as well and now all
start with the prefix 'ess-offset-' and other control variables
start with 'ess-indent-'. See 'ess-style-alist' for detailed
description of the new indentation system.
The most visible user change in the indentation setup is that
customisation is now centered around 3 settings:
'ess-offset-arguments', 'ess-offset-arguments-newline' and
'ess-offset-block'. The first two settings control how arguments
are indented inside function calls and index brackets, while the
latter controls the indentation of statement blocks. They can be
set to 'prev-call' (indentation relative to innermost function
call), 'prev-line' (indentation relative to last line indentation
as in RStudio) or 'open-delim' (indentation relative to opening
delimiter). See the documentation strings of those variables for
more information. Indentation of delimiters refer to these three
values depending on the context in order to offer a consistent
indentation. 'ess-arg-function-offset' has been replaced by
'ess-indent-prev-call-lhs' and has been generalised to
assignements. This setting works with both statement blocks and
expressions. It now only takes effect for offsets set to
'prev-call' in order to produce a consistent indentation.
* ESS[R]: 'ess-brace-imaginary-offset', 'ess-expression-offset' and
all delimiter offsets are deprecated. The settings for indentation
of continued statements have been replaced by
'ess-offset-continuations'. It can be set to either 'cascade' or
'straight' (the default).
* ESS[R]: A new RStudio style is provided to mimic as closely as
possible R files indented via RStudio. To reproduce the setup of
some of the RStudio users, you will also need to set
'ess-offset-arguments' to 'prev-line'.
* ESS[R]: Roxygen fields will now be indented on paragraph refilling
in order to make the documentation more readable. You can also
refill commented lines in the 'examples' field without squashing
the surrounding code in the comments.
* ESS[R]: ESS can now format your code. This is controlled through
the settings 'ess-fill-calls' and 'ess-fill-continuations'. When
activated, '(fill-paragraph)' will format your calls and your
formulas/continuations and make sure they don't go past
'fill-column'. Refilling with a prefix produces an alternative
formatting with one element per line. Repeated refills cycle
through different styles (see the docstrings for more details). By
default, the refilled region blinks. Set 'ess-blink-filling' to
nil to prevent this.
* ESS[R]: Fix occasional missing error location fontification in
More information about the ESS-help