tree 3c73f72b0fe18bc46895eeae077370396289f4b0
parent d380a66e5b08981955090ec84d79cc3feb00a21d
author John Glassmyer <jogl@google.com> 1436566588 -0700
committer Sergey Prigogin <eclipse.sprigogin@gmail.com> 1450840415 -0800

Improvments to checking for conflicts among tag numbers and names:
1) Do not consider elements of a nested "extend" when checking for conflicts
   with "reserved" or "extensions" declarations.
2) Do not report more than one conflict error per element.
3) Consider elements of groups when checking for field-number conflicts.

Change-Id: Iee85fd7b16ef79686984f1f20ee9b22053577dd6