Comment by DeveloperFish

Interesting... @Taligent we built a completely object-oriented dev. environment for C++ (borrowing a lot from various SmallTalk environments). There was no file system - everything was an object - comments were stored in the object system along with implementations. This allowed for some really cool self-documented versioning on classes. However the real magic was in the debugger where we were building runtime support for "edit/run" and "what if" so you can edit faulty code and rerun w/out the recompile (essentially patching the class as it was running). Seems easy now (w/dynamic languages) but at the time this was close to "rocket science..."