One of the goals of the project was to find bugs caused by copy-pasting, which happen when a piece of code is copied but not all variables in this piece of code are correctly adapted to the new environment (e.g. like this 'if (mutex1.try_lock()) { foo(); mutex2.unlock(); }' where the mutex2 variable is a leftover from the original source code).
This patch adds support vor analyzing the pattern of the referenced variables for similar errors. So far only 'one-off' errors are supported, i.e. pattern errors where only one variable is not following the pattern of its related clones.
Additionally, the CloneChecker - which is currently the primary user of the CloneDetector API - now also supports reporting these suspicious clones.