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http://gambaswiki.org/wiki/doc/diffvb http://gambaswiki.org/wiki/doc/diffvb lists "Differences From Visual Basic" and says "Gambas is not intended to be a clone

• jsjddbbwj 7y ago
  >Thankfully, in Gambas you cannot use GOTO to trap errors! Instead, use CATCH, FINALLY or TRY For error handling goto is generally much clearer than using exceptions.
  • stan_rogers 7y ago
    The construction being referenced is On Error [ERR_NO] Goto LABEL, which is not usually local to the error, and, depending on the dialect may be a generic handler that first needs to figure out what error it's handling.
    • rsynnott 7y ago
      Or, worse, and common in classic VB, ON ERROR RESUME NEXT. Which just skips the line that errored.
      • throwaway3neu94 7y ago
        It sets Err. Which is essentially how SH, C and Go work too. (With the obvious exceptions of longjmp and panic/defer, global vs local var, and Go forcing to assign the error.) On Error Resume Next isn't great, but calling it much worse than On Error Goto, or much worse than other languages, is a stretch. My point is only that people complain about it in VB disproportionally often compared to other languages. (Does that mitigate the issue to some extent, if every VB dev is super aware of it?)
        • rsynnott 7y ago
          I don’t think I’ve ever seen any vb code which actually checks that, though,or dry little, certainly. In C and Go you get something returned, which is a hint that you should maybe do something with it. In VB a magic global variable is set, and then generally ignored.
          • iforgotpassword 7y ago
            That's how I've done it. Enable it before the line(s) in question, then check err.number, and add "On Error Goto 0" after that so you get the default handler again. Usually much cleaner than jumping to somewhere else, but that had its uses too.
            • rsynnott 7y ago
              Ah. I was never actually a VB programmer, but I did have a few side-jobs porting VB apps (mostly CRUD webapps) to something more modern in the mid-noughties. My experience from that was that real world use of on error resume next was to turn it on and leave it on.
  • wolco 7y ago
    Cleaner? Prettier? That's a preference. Having the catch below allows you to see everything at once. Complexity can be encapsulation in readable functions/class method names, etc if your catch does too much.
  • deleted 7y ago
    [deleted]
  • Mrat 7y ago
    Dijkstra would hate you
• smacktoward 7y ago
  Of course, you can’t copy your Visual Basic projects into Microsoft’s own Visual Basic.NET and expect them to compile there either.