Your C #define is done at compile time. This Cobol's alter example [1] seem to do so at runtime. Thus labels can be considered modifiable points. Actually, it's

Your C #define is done at compile time. This Cobol's alter example [1] seem to do so at runtime. Thus labels can be considered modifiable points. Actually, it's kinda interesting... does it support chains? Alter A->B and B->C, does GoTo A call C? If i now alter X->A then A->D and GoTo X, where do you end up? C? D? Hope you can at least undo that with something like alter A->A. Actually, I probably don't even want to know. Hope using it gives a big warning in whatever tools Cobal devs use. [1] https://riptutorial.com/cobol/example/19820/a-contrived-example-using-alter https://riptutorial.com/cobol/example/19820/a-contrived-exam...