It would be useful to have a diff-viewer integrated with Eclipse to understand how each compiler's phase affects the original source file.

For example, if a user wants to check how a source file containing CPS is transformed, he needs to open a terminal and execute the following command:

$ scalac -P:continuations:enable SomeFile.scala -Xprint:selectivecps

This will output the tree produced by the compilert after the `selectivecps`phase is ran. The idea is to allow the user to open a diff-viewer within Eclipse where it could compare the original file with the transformed one up to some compiler phase. This would be pretty useful to understand how the compiler desugarize and transforms the orginal source code after each compiler's phase.