Re: support range durations

[Ihor Radchenko <yantar92@posteo.net>]

Guido Stevens <guido.stevens@cosent.net> writes:

> As per https://orgmode.org/manual/Column-attributes.html I'm using range 
> durations to express effort estimations. Those get summarized nicely in 
> column views, using the {est+} summarizer. But when I access an agenda 
> view that encounters a task that has such a range duration directly set, 
> the agenda chokes with an error message:
>
> 	org-duration-to-minutes: Invalid duration format: "1d-2d"

May you please provide more details on how to trigger the error?

> ...
> * lisp/org-duration.el (org-duration-to-minutes): Do not choke on
> low-high range durations (e.g. "2d-5d") when rendering an agenda. Calculate the average
> of the range instead.
>
> Range durations are valid when estimating effort, and supported
> elsewhere via the {est+} summarizer.

Org mode durations have no notion of ranges. It is completely
org-colview thing. So, modifying `org-duration-to-minutes' is not
appropriate. We need to fix org-colview, not org-duration.

-- 
Ihor Radchenko // yantar92,
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