Review Request 120176: Suggest file buddies based on DUChain

[Max Schwarz]

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https://git.reviewboard.kde.org/r/120176/
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Review request for KDevelop.


Repository: kdev-clang


Description
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Many projects have source trees with split include / source folders.
In that situation the path-based buddy finder does not work. So
examine DUChain declarations/definitions and rank possible buddy files
to find the most probably one. If we found such a buddy file, add it
to the suggestions.

Of course, this improvement does not depend on kdev-clang. If you point
me towards a suitable place in kdevplatform, I can also add it there.


Diffs
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  documentfinderhelpers.cpp 6535ab9 

Diff: https://git.reviewboard.kde.org/r/120176/diff/


Testing
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Tested on a medium codebase (>100 source files) with the SwitchToBuddy shortcut (Ctrl+Alt+c). Works fine with no visible performance drop.


Thanks,

Max Schwarz

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