Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.lang.java.programmer > #20986

Re: question on java lang spec chapter 3.3 (unicode char lexing)

X-Received by 10.66.84.164 with SMTP id a4mr5950147paz.26.1357393248031; Sat, 05 Jan 2013 05:40:48 -0800 (PST)
Received by 10.49.94.143 with SMTP id dc15mr9231523qeb.32.1357393247975; Sat, 05 Jan 2013 05:40:47 -0800 (PST)
Path csiph.com!v102.xanadu-bbs.net!xanadu-bbs.net!news.glorb.com!b8no8206404pbd.0!news-out.google.com!s9ni79141pbb.0!nntp.google.com!b8no8206398pbd.0!postnews.google.com!glegroupsg2000goo.googlegroups.com!not-for-mail
Newsgroups comp.lang.java.programmer
Date Sat, 5 Jan 2013 05:40:47 -0800 (PST)
In-Reply-To <70744efd-9848-42ef-944f-dcd667f75045@googlegroups.com>
Complaints-To groups-abuse@google.com
Injection-Info glegroupsg2000goo.googlegroups.com; posting-host=50.14.119.173; posting-account=lPVJQwoAAACjT2AlnY0YSj2LC4j2qtwQ
NNTP-Posting-Host 50.14.119.173
References <0f28108e-6d35-43a1-a9df-b6c5636fb0ec@googlegroups.com> <km19e81cvgra3q7q7ck2gi2lokpe9q4el0@4ax.com> <50e4d730$0$288$14726298@news.sunsite.dk> <24e3a8de-a422-4d4e-a319-aeedddb9df03@googlegroups.com> <NYqdnSF1y-Gvu3jNnZ2dnUVZ_qmdnZ2d@earthlink.com> <WZ6dnS6Bc7o4vnXNnZ2dnUVZ8kOdnZ2d@bt.com> <70744efd-9848-42ef-944f-dcd667f75045@googlegroups.com>
User-Agent G2/1.0
MIME-Version 1.0
Message-ID <aaabd6d4-87ba-4522-8953-25bca99d1ccd@googlegroups.com> (permalink)
Subject Re: question on java lang spec chapter 3.3 (unicode char lexing)
From "Aryeh M. Friedman" <Aryeh.Friedman@gmail.com>
Injection-Date Sat, 05 Jan 2013 13:40:48 +0000
Content-Type text/plain; charset=ISO-8859-1
Content-Transfer-Encoding quoted-printable
Xref csiph.com comp.lang.java.programmer:20986

Show key headers only | View raw

On Saturday, January 5, 2013 8:34:38 AM UTC-5, Aryeh M. Friedman wrote:
> On Saturday, January 5, 2013 7:58:57 AM UTC-5, Chris Uppal wrote:
> 
> > Patricia Shanahan wrote:
> 
> > 
> 
> > 
> 
> > 
> 
> > > You would at least need to detect the escapes to get a usable error
> 
> > 
> 
> > > message. Once you have done that, it is so easy to replace each escape
> 
> > 
> 
> > > with the equivalent Unicode character that it is not worth doing
> 
> > 
> 
> > > anything else.
> 
> > 
> 
> > 
> 
> > 
> 
> > I'm not so sure about that.  IIRC the rules about interpretting Unicode escapes 
> 
> > 
> 
> > have some seriously wierd convolutions. Something to do with protecting against 
> 
> > 
> 
> > multiply-encoded files, I think.  It badly fails the Principle of Least WTF.
> 
> > 
> 
> > 
> 
> > 
> 
> > It's in the spec, but I'm too lazy to go find the exact reference :-(
> 
> > 
> 
> > 
> 
> > 
> 
> >     -- chruis
> 
> 
> 
> agreed for example the following is just ugly but perfectly valid Java code:
> 
> 
> 
> Foo.java:
> 
> \u0070\u0075\u0062\u006C\u0069\u0063\u0020\u0063\u006C\u0061\u0073\u0073\u0020\u0046\u006F\u006F\u000A\u007B\u000A\u0009\u0070\u0075\u0062\u006C\u0069\u0063\u0020\u0073\u0074\u0061\u0074\u0069\u0063\u0020\u0076\u006F\u0069\u0064\u0020\u006D\u0061\u0069\u006E\u0028\u0053\u0074\u0072\u0069\u006E\u0067\u005B\u005D\u0020\u0061\u0072\u0067\u0073\u0029\u000A\u0009\u007B\u000A\u0009\u0009\u0053\u0079\u0073\u0074\u0065\u006D\u002E\u006F\u0075\u0074\u002E\u0070\u0072\u0069\u006E\u0074\u006C\u006E\u0028\u0022\u0068\u0065\u006C\u006C\u006F\u002C\u0020\u0077\u006F\u0072\u006C\u0064\u0022\u0029\u003B\u000A\u0009\u007D\u000A\u007D\u000A
> 
> 
> 
> % javac Foo.java
> 
> % java Foo
> 
> hello, world

Just a quick note I did end up implementing unicode escapes the way JLSv3 says to and the above is one our test inputs...

Back to comp.lang.java.programmer | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

question on java lang spec chapter 3.3 (unicode char lexing) "Aryeh M. Friedman" <Aryeh.Friedman@gmail.com> - 2013-01-02 00:20 -0800
  Re: question on java lang spec chapter 3.3 (unicode char lexing) "Aryeh M. Friedman" <Aryeh.Friedman@gmail.com> - 2013-01-02 00:24 -0800
    Re: question on java lang spec chapter 3.3 (unicode char lexing) Patricia Shanahan <pats@acm.org> - 2013-01-02 12:24 -0800
  Re: question on java lang spec chapter 3.3 (unicode char lexing) Lew <lewbloch@gmail.com> - 2013-01-02 11:16 -0800
    Re: question on java lang spec chapter 3.3 (unicode char lexing) Arne Vajhøj <arne@vajhoej.dk> - 2013-01-02 19:55 -0500
      Re: question on java lang spec chapter 3.3 (unicode char lexing) Lew <lewbloch@gmail.com> - 2013-01-02 17:21 -0800
        Re: question on java lang spec chapter 3.3 (unicode char lexing) Arne Vajhøj <arne@vajhoej.dk> - 2013-01-02 20:40 -0500
  Re: question on java lang spec chapter 3.3 (unicode char lexing) Roedy Green <see_website@mindprod.com.invalid> - 2013-01-02 11:17 -0800
    Re: question on java lang spec chapter 3.3 (unicode char lexing) Arne Vajhøj <arne@vajhoej.dk> - 2013-01-02 19:56 -0500
      Re: question on java lang spec chapter 3.3 (unicode char lexing) "Aryeh M. Friedman" <Aryeh.Friedman@gmail.com> - 2013-01-02 17:27 -0800
        Re: question on java lang spec chapter 3.3 (unicode char lexing) "Aryeh M. Friedman" <Aryeh.Friedman@gmail.com> - 2013-01-02 17:32 -0800
        Re: question on java lang spec chapter 3.3 (unicode char lexing) Lew <lewbloch@gmail.com> - 2013-01-02 17:42 -0800
          Re: question on java lang spec chapter 3.3 (unicode char lexing) "Aryeh M. Friedman" <Aryeh.Friedman@gmail.com> - 2013-01-02 17:55 -0800
            Re: question on java lang spec chapter 3.3 (unicode char lexing) "Aryeh M. Friedman" <Aryeh.Friedman@gmail.com> - 2013-01-02 18:02 -0800
              Re: question on java lang spec chapter 3.3 (unicode char lexing) Arne Vajhøj <arne@vajhoej.dk> - 2013-01-02 21:12 -0500
                Re: question on java lang spec chapter 3.3 (unicode char lexing) "Aryeh M. Friedman" <Aryeh.Friedman@gmail.com> - 2013-01-02 18:16 -0800
                Re: question on java lang spec chapter 3.3 (unicode char lexing) Arne Vajhøj <arne@vajhoej.dk> - 2013-01-02 21:20 -0500
                Re: question on java lang spec chapter 3.3 (unicode char lexing) "Aryeh M. Friedman" <Aryeh.Friedman@gmail.com> - 2013-01-02 18:22 -0800
                Re: question on java lang spec chapter 3.3 (unicode char lexing) Arne Vajhøj <arne@vajhoej.dk> - 2013-01-02 21:26 -0500
                Re: question on java lang spec chapter 3.3 (unicode char lexing) "Aryeh M. Friedman" <Aryeh.Friedman@gmail.com> - 2013-01-02 18:27 -0800
                Re: question on java lang spec chapter 3.3 (unicode char lexing) Arne Vajhøj <arne@vajhoej.dk> - 2013-01-02 21:46 -0500
                Re: question on java lang spec chapter 3.3 (unicode char lexing) "Aryeh M. Friedman" <Aryeh.Friedman@gmail.com> - 2013-01-02 20:41 -0800
                Re: question on java lang spec chapter 3.3 (unicode char lexing) Arne Vajhøj <arne@vajhoej.dk> - 2013-01-06 21:54 -0500
            Re: question on java lang spec chapter 3.3 (unicode char lexing) Arne Vajhøj <arne@vajhoej.dk> - 2013-01-02 21:15 -0500
              Re: question on java lang spec chapter 3.3 (unicode char lexing) "Aryeh M. Friedman" <Aryeh.Friedman@gmail.com> - 2013-01-02 18:20 -0800
        Re: question on java lang spec chapter 3.3 (unicode char lexing) Arne Vajhøj <arne@vajhoej.dk> - 2013-01-02 21:17 -0500
        Re: question on java lang spec chapter 3.3 (unicode char lexing) Patricia Shanahan <pats@acm.org> - 2013-01-02 22:33 -0800
          Re: question on java lang spec chapter 3.3 (unicode char lexing) "Chris Uppal" <chris.uppal@metagnostic.REMOVE-THIS.org> - 2013-01-05 12:58 +0000
            Re: question on java lang spec chapter 3.3 (unicode char lexing) "Aryeh M. Friedman" <Aryeh.Friedman@gmail.com> - 2013-01-05 05:34 -0800
              Re: question on java lang spec chapter 3.3 (unicode char lexing) "Aryeh M. Friedman" <Aryeh.Friedman@gmail.com> - 2013-01-05 05:40 -0800
              Re: question on java lang spec chapter 3.3 (unicode char lexing) Arne Vajhøj <arne@vajhoej.dk> - 2013-01-06 21:56 -0500
      Re: question on java lang spec chapter 3.3 (unicode char lexing) Martin Gregorie <martin@address-in-sig.invalid> - 2013-01-03 21:14 +0000
        Re: question on java lang spec chapter 3.3 (unicode char lexing) Arne Vajhøj <arne@vajhoej.dk> - 2013-01-03 17:51 -0500
          Re: question on java lang spec chapter 3.3 (unicode char lexing) "Aryeh M. Friedman" <Aryeh.Friedman@gmail.com> - 2013-01-03 20:54 -0800
            Re: question on java lang spec chapter 3.3 (unicode char lexing) Martin Gregorie <martin@address-in-sig.invalid> - 2013-01-05 00:15 +0000
            Re: question on java lang spec chapter 3.3 (unicode char lexing) "Chris Uppal" <chris.uppal@metagnostic.REMOVE-THIS.org> - 2013-01-05 13:03 +0000
              Re: question on java lang spec chapter 3.3 (unicode char lexing) "Aryeh M. Friedman" <Aryeh.Friedman@gmail.com> - 2013-01-05 05:25 -0800
                Re: question on java lang spec chapter 3.3 (unicode char lexing) Arne Vajhøj <arne@vajhoej.dk> - 2013-01-06 21:49 -0500
                Re: question on java lang spec chapter 3.3 (unicode char lexing) "Aryeh M. Friedman" <Aryeh.Friedman@gmail.com> - 2013-01-06 23:26 -0800
            Re: question on java lang spec chapter 3.3 (unicode char lexing) Arne Vajhøj <arne@vajhoej.dk> - 2013-01-06 21:44 -0500
  Re: question on java lang spec chapter 3.3 (unicode char lexing) Arne Vajhøj <arne@vajhoej.dk> - 2013-01-02 19:54 -0500

csiph-web