[ESS] looking for definitions of R functions

[Vitalie Spinu]

In addition to xref and etags I use M-o for imenu-anywhere. It works within all
buffers of the same mode and buffers within same project (if you have projectile
installed). The benefit is that you don't need any fancy lockup functionality or
TAGS. It will work straight away. The drawback is that you need to open the
buffers first.

  Vitalie

>> On Fri, Jun 22 2018 10:15, Stephen Eglen via ESS-help wrote:

> Hello,

> what are people using (if anything) to find declarations of R functions
> within Emacs buffers?  e.g. when point is on the name of a function, you
> hit a keybinding to look up the definiton of that function.

> I just had some success with using dumb-jump.el
> https://github.com/jacktasia/dumb-jump  -- it has a notion of a project
> folder within which it will search for R function definitions
> dynamically using a grep variant.  (It doesn't always work -- e.g. I
> can't yet get it to fund hidden functions that begin with a period,
> since I think it does not recognise the . as beginning of a word.)

> But I'm just wondering if others had success with other packages?  We
> mention TAGS files in our ESS documentation, and rtags.

> Stephen

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