D8202: Fix Qt 5.5 compatibility -- no constFirst/Last methods.

[Friedrich W. H. Kossebau]

kossebau added a comment.


  > None of these are in performance-relevant code, so I don't believe it's worthwhile adding ifdefs; just revert this patch whenever 5.5 support is dropped.
  
  Possible problems: the person bumping min qt version to > 5.5 will not remember about this. And the same for the next person "fixing" this non-const calls.
  
  So while ifdef adds some another code variant which makes test coverage worse, it still help cleaning up the code on version bumps and prevents compat-breaking "fixing". So I would opt for ifdef.

REPOSITORY
  R32 KDevelop

REVISION DETAIL
  https://phabricator.kde.org/D8202

To: flherne, #kdevelop
Cc: kossebau, kdevelop-devel
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