[Bug 710034] parse: bison finds conflicts / ambiguities

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=710034
  GStreamer | gstreamer (core) | git

--- Comment #4 from Fabian <derfakir at web.de> 2013-11-05 16:48:21 UTC ---
Created an attachment (id=259027)
 View: https://bugzilla.gnome.org/attachment.cgi?id=259027
 Review: https://bugzilla.gnome.org/review?bug=710034&attachment=259027

reorganized grammar

tried to get grammar straight with minimal loss of backward compat.
some structures could get their names re-factored, but wanted to keep diff
small in first step.

missing backward compat in following way:    
Bin's content can not start or end with LINK

example #1)
$ gst-launch ( fakesrc ! ) fakesink # does not work anymore
$ gst-launch ( fakesrc ) ! fakesink # does work

example #2)
$ gst-launch fakesrc ( ! fakesink ) # does not work anymore
$ gst-launch fakesrc ! ( fakesink ) # does work

rationale)
bins should behave similar to elements. imagine a           
element crazysrc which activly look for other elements 
and links to their pads.
$ gst-launch crazysrc fakesink # this is not expected to work
$ gst-launch fakesrc crazysink # this is also not expected to work

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