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Re: telling the javac that a method doesn't return at all...

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On 3/5/2014 8:31 AM, Andreas Leitgeb wrote:
> Arne Vajhøj <arne@vajhoej.dk> wrote:
>> On 2/28/2014 12:10 PM, Andreas Leitgeb wrote:
>>> Suppose I have some "doCleanUpAndExit" method, that in the
>>> end either calls System.exit() or throws some Error or custom
>>> RuntimeException.
>>>
>>> I'd like the compiler to *know* that this method cannot possibly
>>> return, and that any code following it should be considered
>>> as "unreachable" code by the compiler.
>>
>> I have at a few occasions wished for the same ability.
>> Although I typical have needed it to avoid a compiler error.
>
>> Oversimplified example:
>>     public int foobar(int v) {
>>     	if(v > 0) {
>>     	   return v++;
>>     	} else {
>>     	   System.exit(0);
>>     	   return 0; // hmmmm
>
> My advice here is to throw some RuntimeException or Error here.
 >
 > This may be overly theoretic for System.exit(), but makes more
 > sense for one's custom com.example.project.StaticUtils.myExit(),
 > that due to some bug might fail to bail out.

Could do that.

But problem still exist.

Arne

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Thread

telling the javac that a method doesn't return at all... Andreas Leitgeb <avl@auth.logic.tuwien.ac.at> - 2014-02-28 17:10 +0000
  Re: telling the javac that a method doesn't return at all... Lew <lewbloch@gmail.com> - 2014-02-28 16:13 -0800
    Re: telling the javac that a method doesn't return at all... Jeff Higgins <jeff@invalid.invalid> - 2014-03-01 09:12 -0500
      Re: telling the javac that a method doesn't return at all... Andreas Leitgeb <avl@auth.logic.tuwien.ac.at> - 2014-03-05 13:06 +0000
  Re: telling the javac that a method doesn't return at all... Roedy Green <see_website@mindprod.com.invalid> - 2014-03-01 01:10 -0800
    Re: telling the javac that a method doesn't return at all... Jeff Higgins <jeff@invalid.invalid> - 2014-03-01 08:44 -0500
  Re: telling the javac that a method doesn't return at all... Arne Vajhøj <arne@vajhoej.dk> - 2014-03-01 22:02 -0500
    Re: telling the javac that a method doesn't return at all... Andreas Leitgeb <avl@auth.logic.tuwien.ac.at> - 2014-03-05 13:31 +0000
      Re: telling the javac that a method doesn't return at all... Arne Vajhøj <arne@vajhoej.dk> - 2014-03-11 20:11 -0400
        Re: telling the javac that a method doesn't return at all... Andreas Leitgeb <avl@auth.logic.tuwien.ac.at> - 2014-03-12 10:17 +0000
  Re: telling the javac that a method doesn't return at all... Mike Amling <mamling@chaff.us> - 2014-03-04 13:19 -0600
    Re: telling the javac that a method doesn't return at all... Andreas Leitgeb <avl@auth.logic.tuwien.ac.at> - 2014-03-05 13:39 +0000
  Re: telling the javac that a method doesn't return at all... mike.s.schilling@gmail.com - 2014-03-04 19:30 -0800
    Re: telling the javac that a method doesn't return at all... Andreas Leitgeb <avl@auth.logic.tuwien.ac.at> - 2014-03-09 14:33 +0000
  Re: telling the javac that a method doesn't return at all... Silvio <silvio@internet.com> - 2014-03-12 14:03 +0100
  Re: telling the javac that a method doesn't return at all... Michal Kleczek <michal_wytnijto@kleczek.org> - 2014-03-19 11:51 +0100
    Re: telling the javac that a method doesn't return at all... Andreas Leitgeb <avl@auth.logic.tuwien.ac.at> - 2014-03-19 12:28 +0000
      Re: telling the javac that a method doesn't return at all... Michal Kleczek <michal_wytnijto@kleczek.org> - 2014-03-23 11:15 +0100

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