Commits on Apr 12, 2014

1. make headSize and tailSize back into ArrowOpts fields …

   As attributes, there are situations where it is actually impossible (or
   at least very difficult) to get things the way you want.  E.g. imagine
   creating a whole bunch of arrows via connectOutside and applyAll, but
   you want them to have all different head sizes.  I am not sure how to
   accomplish this via attributes at the moment.
   
   It is also simply annoying to have some arrow attributes set via
   ArrowOpts and some as normal attributes.  I ran into this when updating
   the website gallery, it was a confusing error and would have been
   annoying to fix.
   
   In the long term, I would love to have all arrow attributes be normal
   attributes... but that may have to wait until we have constraint solving
   and can declare arrows as separate standalone diagrams (to which
   attributes can be applied).
   
   Note this does mean deleting headSizeG, headSizeO, etc. It would be
   ideal to be able to write e.g. `... & headSizeG .~ 3 & ...`
   rather than `... & headSize (Global 3) & ...`, however, such a
   `headSizeG` would not be a valid lens.

   

   byorgey committed Apr 12, 2014
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