Abstract
To detect the changes of a program, the line-based difference between two versions of the program have been frequently used. In a single commitment performed on a version control system, however, multiple changes are usually intermingled. In this case, it is troublesome to untangle them. The proposed method can detect such individual changes. For this, it restores snapshots of the program from the history of editing operations for the target program and compares information on class members that results from syntax analysis for respective snapshots. Experimental results with a running tool implementing are also shown.
