On Friday, 2 June 2017 at 02:32:43 UTC, Mike B Johnson wrote:
1. change test12.wav to test123.wav 2. save file 3. recompile. 4. run5. Get back to same test point(could be a lot or a little amount of work).
If that is all you want; then compile your code into a dll/so and load the new version.
The D compiler is fast enough that it will not break your flow.program-state management would be taken by the static part of your program.