[ID 20000123.003] [BUG our() 5.005_63] Lexical scoping problems.

[Michael G Schwern <schwern@pobox.com>]

I've bumped into a few basic scoping problems with our():

our $a = "Outer";
{
        our $a = "Inner";
        print "$a\n";
}
print "$a\n";

$a is "Inner" in both places.  If I understand how our() works, its
supposed to have the same scoping rules as my().  I would expect
"Inner" and then "Outer", same as my().


Next, our() doesn't appear to localize in a loop conditional:

our $a = "Outer";
for (our $a = 1; $a < 2; $a++) {
        print "$a\n";
}
print "$a\n";

$a is 3, not "Outer" after the for loop.  I presume the two bugs are
related.

However, this -does- work as expected.

our $a = "Outer";
for our $a (1, 2) {
        print "$a\n";
}
print "$a\n";

$a is 'Outer' after the for loop.

Summary of my perl5 (revision 5.0 version 5 subversion 63) configuration:
  Platform:
    osname=linux, osvers=2.2.10, archname=i686-linux
    uname='linux athens 2.2.10 #3 smp mon aug 2 16:48:09 edt 1999 i686 unknown '
    config_args=''
    hint=previous, useposix=true, d_sigaction=define
    usethreads=undef useperlio=undef d_sfio=undef
    use64bits=undef usemultiplicity=undef
  Compiler:
    cc='cc', optimize='-g', gccversion=2.95.2 19991109 (Debian GNU/Linux)
    cppflags='-Dbool=char -DHAS_BOOL -DDEBUGGING -fno-strict-aliasing -I/usr/local/include -DDEBUGGING_OPS -DDEBUGGING_MSTATS'
    ccflags ='-Dbool=char -DHAS_BOOL -DDEBUGGING -fno-strict-aliasing -I/usr/local/include -DDEBUGGING_OPS -DDEBUGGING_MSTATS'
    stdchar='char', d_stdstdio=define, usevfork=false
    intsize=4, longsize=4, ptrsize=4, doublesize=8
    d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=12
    alignbytes=4, usemymalloc=y, prototype=define
  Linker and Libraries:
    ld='cc', ldflags =' -L/usr/local/lib'
    libpth=/usr/local/lib /lib /usr/lib
    libs=-lnsl -lndbm -lgdbm -ldbm -ldb -ldl -lm -lc -lposix -lcrypt
    libc=/lib/libc-2.1.2.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: DEBUGGING
  Built under linux
  Compiled at Jan  3 2000 05:17:35
  @INC:
    /usr/local/perl5.005_63/lib/i686-linux
    /usr/local/perl5.005_63/lib
    /usr/local/perl5.005_63/lib/site_perl/i686-linux
    /usr/local/perl5.005_63/lib/site_perl
    .

-- 

Michael G Schwern                                           schwern@pobox.com
                    http://www.pobox.com/~schwern
     /(?:(?:(1)[.-]?)?\(?(\d{3})\)?[.-]?)?(\d{3})[.-]?(\d{4})(x\d+)?/i

---

Follow-Ups from:

Gurusamy Sarathy <gsar@ActiveState.com>

---

[Date Prev][Date Next] [Thread Prev][Thread Next] [Date Index][Thread Index][Top&Search][Original]

---