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Range operator misbehaving

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From:
Dan Brook
Date:
April 3, 2003 06:30
Subject:
Range operator misbehaving
Message ID:
20030403153026.3451f2e1.dbrook@easyspace.com
When the range operator is used on it's own within in a list that the
reference operator is working on it returns an array reference (as
opposed to a list of references). However B::Deparse produces the
*expected* output

$localhost.dan(1.221, "bleadperl") perl5.6.1 -MO=Deparse -le '$x = \(1
.. 5); print "\$x($x): @$x"'

$x = \(1, 2, 3, 4, 5);
print "\$x($x): @$x";

-e syntax OK
$localhost.dan(1.222, "bleadperl") perl5.8.0 -MO=Deparse -le '$x = \(1
.. 5); print "\$x($x): @$x"' BEGIN { $/ = "\n"; $\ = "\n"; }
$x = \(1, 2, 3, 4, 5);
print "\$x($x): @$x";
-e syntax OK
$localhost.dan(1.223, "bleadperl") ./perl -Ilib -MO=Deparse -le '$x =
\(1 .. 5); print "\$x($x): @$x"' BEGIN { $/ = "\n"; $\ = "\n"; }
$x = \(1, 2, 3, 4, 5);
print "\$x($x): @$x";
-e syntax OK

Which is expected behaviour, however the output is quite different

$localhost.dan(1.218, "bleadperl") perl5.6.1 -le '$x = \(1 .. 5); print
"\$x($x): @$x"'$x(ARRAY(0x8107ff4)): 1 2 3 4 5
$localhost.dan(1.219, "bleadperl") perl5.8.0 -le '$x = \(1 .. 5); print
"\$x($x): @$x"'$x(ARRAY(0x8061528)): 1 2 3 4 5
$localhost.dan(1.220, "bleadperl") ./perl -le '$x = \(1 .. 5); print
"\$x($x): @$x"'$x(ARRAY(0x8129570)): 1 2 3 4 5

But when the operator is 'forced' into list context it behaves as
expected 

$localhost.dan(1.210, "bleadperl") perl5.6.1 -le '$x = \(1 .. 5,6);
print @$x' Not an ARRAY reference at -e line 1.
$localhost.dan(1.211, "bleadperl") perl5.8.0 -le '$x = \(1 .. 5,6);
print @$x' Not an ARRAY reference at -e line 1.
$localhost.dan(1.212, "bleadperl") ./perl -le '$x = \(1 .. 5,6); print
@$x' Not an ARRAY reference at -e line 1.

And the version details ...

$localhost.dan(1.229, "bleadperl") perl5.6.1 -V 
Summary of my perl5 (revision 5.0 version 6 subversion 1) configuration:
  Platform:
    osname=linux, osvers=2.4.17-0.13smp, archname=i386-linux
    uname='linux daffy.perf.redhat.com 2.4.17-0.13smp #1 smp fri feb 1
10:30:48 est 2002 i686 unknown '    config_args='-des -Doptimize=-O2
-march=i386 -mcpu=i686 -Dcc=gcc -Dcf_by=Red Hat, Inc. -Dcccdlflags=-fPIC
-Dinstallprefix=/usr -Dprefix=/usr -Darchname=i386-linux
-Dvendorprefix=/usr -Dsiteprefix=/usr -Uusethreads -Uuseithreads
-Uuselargefiles -Dd_dosuid -Dd_semctl_semun -Di_db -Di_ndbm -Di_gdbm
-Di_shadow -Di_syslog -Dman3ext=3pm'    hint=recommended, useposix=true,
d_sigaction=define    usethreads=undef use5005threads=undef
useithreads=undef usemultiplicity=undef    useperlio=undef d_sfio=undef
uselargefiles=undef usesocks=undef    use64bitint=undef
use64bitall=undef uselongdouble=undef  Compiler:
    cc='gcc', ccflags ='-fno-strict-aliasing -I/usr/local/include',
    optimize='-O2 -march=i386 -mcpu=i686',
    cppflags='-fno-strict-aliasing -I/usr/local/include'
    ccversion='', gccversion='2.96 20000731 (Red Hat Linux 7.2
2.96-109)', gccosandvers=''    intsize=4, longsize=4, ptrsize=4,
doublesize=8, byteorder=1234    d_longlong=define, longlongsize=8,
d_longdbl=define, longdblsize=12    ivtype='long', ivsize=4,
nvtype='double', nvsize=8, Off_t='off_t', lseeksize=4    alignbytes=4,
usemymalloc=n, prototype=define  Linker and Libraries:
    ld='gcc', ldflags =' -L/usr/local/lib'
    libpth=/usr/local/lib /lib /usr/lib
    libs=-lnsl -ldl -lm -lc -lcrypt -lutil
    perllibs=-lnsl -ldl -lm -lc -lcrypt -lutil
    libc=/lib/libc-2.2.5.so, so=so, useshrplib=false, libperl=libperl.a
  Dynamic Linking:
    dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags='-rdynamic'
    cccdlflags='-fPIC', lddlflags='-shared -L/usr/local/lib'


Characteristics of this binary (from libperl): 
  Compile-time options:
  Built under linux
  Compiled at Apr  1 2002 12:23:22
  @INC:
    /usr/lib/perl5/5.6.1/i386-linux
    /usr/lib/perl5/5.6.1
    /usr/lib/perl5/site_perl/5.6.1/i386-linux
    /usr/lib/perl5/site_perl/5.6.1
    /usr/lib/perl5/site_perl/5.6.0
    /usr/lib/perl5/site_perl
    /usr/lib/perl5/vendor_perl/5.6.1/i386-linux
    /usr/lib/perl5/vendor_perl/5.6.1
    /usr/lib/perl5/vendor_perl
    .

$localhost.dan(1.230, "bleadperl") perl5.8.0 -V
Summary of my perl5 (revision 5.0 version 8 subversion 0) configuration:
  Platform:
    osname=linux, osvers=2.4.18-3, archname=i686-linux-thread-multi
    uname='linux dhcp152.noc.easyspace.net 2.4.18-3 #1 thu apr 18
07:37:53 edt 2002 i686 unknown '    config_args='-Dusethreads'
    hint=recommended, useposix=true, d_sigaction=define
    usethreads=define use5005threads=undef useithreads=define
usemultiplicity=define    useperlio=define d_sfio=undef
uselargefiles=define usesocks=undef    use64bitint=undef
use64bitall=undef uselongdouble=undef    usemymalloc=n,
bincompat5005=undef  Compiler:
    cc='cc', ccflags ='-D_REENTRANT -D_GNU_SOURCE -fno-strict-aliasing
-I/usr/local/include -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64
-I/usr/include/gdbm',    optimize='-O2',
    cppflags='-D_REENTRANT -D_GNU_SOURCE -fno-strict-aliasing
-I/usr/local/include -I/usr/include/gdbm'    ccversion='',
gccversion='2.96 20000731 (Red Hat Linux 7.3 2.96-110)', gccosandvers=''
   intsize=4, longsize=4, ptrsize=4, doublesize=8, byteorder=1234   
d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=12   
ivtype='long', ivsize=4, nvtype='double', nvsize=8, Off_t='off_t',
lseeksize=8    alignbytes=4, prototype=define
  Linker and Libraries:
    ld='cc', ldflags =' -L/usr/local/lib'
    libpth=/usr/local/lib /lib /usr/lib
    libs=-lnsl -lndbm -lgdbm -ldl -lm -lpthread -lc -lcrypt -lutil
    perllibs=-lnsl -ldl -lm -lpthread -lc -lcrypt -lutil
    libc=/lib/libc-2.2.5.so, so=so, useshrplib=true, libperl=libperl.so
    gnulibc_version='2.2.5'
  Dynamic Linking:
    dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags='-rdynamic
-Wl,-rpath,/usr/local/lib/perl5/5.8.0/i686-linux-thread-multi/CORE'   
cccdlflags='-fpic', lddlflags='-shared -L/usr/local/lib'


Characteristics of this binary (from libperl): 
  Compile-time options: MULTIPLICITY USE_ITHREADS USE_LARGE_FILES
PERL_IMPLICIT_CONTEXT  Built under linux
  Compiled at Oct 17 2002 13:52:58
  @INC:
    /usr/local/lib/perl5/5.8.0/i686-linux-thread-multi
    /usr/local/lib/perl5/5.8.0
    /usr/local/lib/perl5/site_perl/5.8.0/i686-linux-thread-multi
    /usr/local/lib/perl5/site_perl/5.8.0
    /usr/local/lib/perl5/site_perl
    /home/dan/.perl
    /root/.perl
    .

$localhost.dan(1.232, "bleadperl") ./perl -Ilib -V
Summary of my perl5 (revision 5.0 version 9 subversion 0 patch 19143)
configuration:  Platform:
    osname=linux, osvers=2.4.18-3, archname=i686-linux
    uname='linux dhcp140.noc.easyspace.net 2.4.18-3 #1 thu apr 18
07:37:53 edt 2002 i686 unknown '    config_args='-d'
    hint=recommended, useposix=true, d_sigaction=define
    usethreads=undef useithreads=undef usemultiplicity=undef
    useperlio=define d_sfio=undef uselargefiles=define usesocks=undef
    use64bitint=undef use64bitall=undef uselongdouble=undef
    usemymalloc=n, bincompat5005=undef
  Compiler:
    cc='cc', ccflags ='-fno-strict-aliasing -I/usr/local/include
-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -I/usr/include/gdbm',   
optimize='-O2',    cppflags='-fno-strict-aliasing -I/usr/local/include
-I/usr/include/gdbm'    ccversion='', gccversion='2.96 20000731 (Red Hat
Linux 7.3 2.96-110)', gccosandvers=''    intsize=4, longsize=4,
ptrsize=4, doublesize=8, byteorder=1234    d_longlong=define,
longlongsize=8, d_longdbl=define, longdblsize=12    ivtype='long',
ivsize=4, nvtype='double', nvsize=8, Off_t='off_t', lseeksize=8   
alignbytes=4, prototype=define  Linker and Libraries:
    ld='cc', ldflags =' -L/usr/local/lib'
    libpth=/usr/local/lib /lib /usr/lib
    libs=-lnsl -lndbm -lgdbm -ldl -lm -lc -lcrypt -lutil -lrt
    perllibs=-lnsl -ldl -lm -lc -lcrypt -lutil -lrt
    libc=/lib/libc-2.2.5.so, so=so, useshrplib=false, libperl=libperl.a
    gnulibc_version='2.2.5'
  Dynamic Linking:
    dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags='-rdynamic'
    cccdlflags='-fpic', lddlflags='-shared -L/usr/local/lib'


Characteristics of this binary (from libperl): 
  Compile-time options: USE_LARGE_FILES
  Locally applied patches:
        DEVEL18374
  Built under linux
  Compiled at Apr  3 2003 14:04:04
  @INC:
    lib
    /usr/local/lib/perl5/5.9.0/i686-linux
    /usr/local/lib/perl5/5.9.0
    /usr/local/lib/perl5/site_perl/5.9.0/i686-linux
    /usr/local/lib/perl5/site_perl/5.9.0
    /usr/local/lib/perl5/site_perl
    .

Dan

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