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>Common Lisp implementations allowed you to change your program's code while debugging decades ago. Microsoft added bare minimum of similar functionality like f

>Common Lisp implementations allowed you to change your program's code while debugging decades ago. Microsoft added bare minimum of similar functionality like fifteen years ago or so, if I remember correctly. Fair enough. I did say "some of the best debuggers I've used". I've never used Common Lisp. I have no idea what the debugging experience is like on it. Incidentally, I don't find edit & continue to be a terribly useful feature. >I'm not even sure they've caught up on class redefinition and instance upgrade at runtime yet, which has been supported in CL since the 1980s. That has nothing to do with the tooling, though. C++ just doesn't support those features. You also say "caught up" as if committee members had been trying to add those features to C++ but just hadn't been able to. It's much more likely that there hasn't been enough (or any) interest to add them.

jhgb 5y ago
> That has nothing to do with the tooling, though. C++ just doesn't support those features. In principle I don't see how language definition not supporting this would make this entirely impossible. It's just not possible to ask for such a running program transition to be requested from within the language, but with some modest restrictions on program behavior this might be possible to request from within the IDE. The restrictions I imagine to be similar to the restrictions that would enable C++ code to be subject to code-agnostic tracing GC, such as no user-defined XOR-linked lists.
pjmlp 5y ago
Energize C++, not surprisingly out of Common Lisp shop. Visual Age for C++ v4, a Smalltalk like experience. Live++ used by Unreal. Edit-and-Continue has been replaced by hot reload on VS.