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Re: local constants with switch

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From Andreas Leitgeb <avl@auth.logic.tuwien.ac.at>
Newsgroups comp.lang.java.programmer
Subject Re: local constants with switch
Date Thu, 21 Aug 2014 13:57:33 +0000 (UTC)
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Roedy Green <see_website@mindprod.com.invalid> wrote:
> On Sat, 16 Aug 2014 00:24:55 +0000 (UTC), Andreas Leitgeb wrote:
>> Only now, I noticed, that within this chapter the term "constant variable"
>> is coined with the expected meaning.
> Java just initialises in textual order.
>
> In tidying, I sometimes screw things up so there is a reference before
> a definition. Java is not like a spreadsheet sorting out natural
> initialization order.

At least, it doesn't go unnoticed.  If a dependent "constant variable"
ends up before what it depends on, then you'd get:
" ... error: illegal forward reference

It might be more delicate, when you have a circular definition of
constants in separate compilation units (.java files), but I'd
expect the compiler to catch even that.

> One brute force way to avoid this is to put all your initialisation
> values in a static init block, and put that block after all your
> static declarations.

If you put them there, then they'd no longer be "constant variables"
and you then couldn't use them for case-labels in switch-bodies.

PS: I agree, that "constant variable" is an oxymoron.
  A better term might have been "(constant) vari-un-able" ;-)

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Thread

local constants with switch Andreas Leitgeb <avl@auth.logic.tuwien.ac.at> - 2014-08-12 16:56 +0000
  Re: local constants with switch Donkey Hottie <donkey@fredriksson.dy.fi> - 2014-08-12 20:30 +0300
  Re: local constants with switch Andreas Leitgeb <avl@auth.logic.tuwien.ac.at> - 2014-08-12 21:15 +0000
    Re: local constants with switch Silvio <silvio@internet.com> - 2014-08-12 23:20 +0200
    Re: local constants with switch Silvio <silvio@internet.com> - 2014-08-12 23:22 +0200
  Re: local constants with switch Lew <lewbloch@gmail.com> - 2014-08-15 15:22 -0700
    Re: local constants with switch Andreas Leitgeb <avl@auth.logic.tuwien.ac.at> - 2014-08-16 00:24 +0000
      Re: local constants with switch Roedy Green <see_website@mindprod.com.invalid> - 2014-08-18 23:46 -0700
        Re: local constants with switch Andreas Leitgeb <avl@auth.logic.tuwien.ac.at> - 2014-08-21 13:57 +0000
          Re: local constants with switch Joerg Meier <joergmmeier@arcor.de> - 2014-08-21 18:52 +0200
            Re: local constants with switch Mike Amling <mamling@chaff.us> - 2014-08-21 13:19 -0500
              Re: local constants with switch Joerg Meier <joergmmeier@arcor.de> - 2014-08-21 22:41 +0200
            [OT] Re: local constants with switch Eric Sosman <esosman@comcast-dot-net.invalid> - 2014-08-21 14:42 -0400
              Re: [OT] Re: local constants with switch Andreas Leitgeb <avl@auth.logic.tuwien.ac.at> - 2014-08-21 19:21 +0000
                Re: [OT] Re: local constants with switch Joshua Cranmer 🐧 <Pidgeot18@verizon.invalid> - 2014-08-21 22:30 -0500
                Re: [OT] Re: local constants with switch Silvio <silvio@internet.com> - 2014-08-23 14:01 +0200
                Re: [OT] Re: local constants with switch Andreas Leitgeb <avl@auth.logic.tuwien.ac.at> - 2014-08-23 15:22 +0000
              Re: [OT] Re: local constants with switch Arne VajhĂžj <arne@vajhoej.dk> - 2014-08-23 22:12 -0400
          Re: local constants with switch Jim Gibson <jimsgibson@gmail.com> - 2014-08-21 17:04 -0700
            [OT] Re: local constants with switch Eric Sosman <esosman@comcast-dot-net.invalid> - 2014-08-21 20:50 -0400
              Re: [OT] Re: local constants with switch Martin Gregorie <martin@address-in-sig.invalid> - 2014-08-22 11:48 +0000
  Re: local constants with switch Joerg Meier <joergmmeier@arcor.de> - 2014-08-16 01:18 +0200
    Re: local constants with switch Arne VajhĂžj <arne@vajhoej.dk> - 2014-08-15 22:44 -0400
      Re: local constants with switch Andreas Leitgeb <avl@auth.logic.tuwien.ac.at> - 2014-08-16 09:01 +0000
        Re: local constants with switch Joerg Meier <joergmmeier@arcor.de> - 2014-08-16 12:08 +0200
        Re: local constants with switch Arne VajhĂžj <arne@vajhoej.dk> - 2014-08-16 20:39 -0400
          Re: local constants with switch Joerg Meier <joergmmeier@arcor.de> - 2014-08-17 13:08 +0200
      Re: local constants with switch Joerg Meier <joergmmeier@arcor.de> - 2014-08-16 12:07 +0200
  Re: local constants with switch Arne VajhĂžj <arne@vajhoej.dk> - 2014-08-15 22:42 -0400
    Re: local constants with switch Andreas Leitgeb <avl@auth.logic.tuwien.ac.at> - 2014-08-16 09:17 +0000

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