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[perl #112914] suppress warning on using unquoted strings in {} in slices too

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Linda Walsh
May 13, 2012 14:53
[perl #112914] suppress warning on using unquoted strings in {} in slices too
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# New Ticket Created by  Linda Walsh 
# Please include the string:  [perl #112914]
# in the subject line of all future correspondence about this issue. 
# <URL: >

This is a bug report for perl from,
generated with the help of perlbug 1.39 running under perl 5.14.2.

[Please describe your issue here]

I might consider this a wish list item, but from the standpoint
of consistency, I am filing as a low-prio/low-severity bug...
If you wanna change it, no prob.

>From the wording in perldata, and for the sake of consistency this 
seems like it should not issue a warning nor be a potential candidate
for reserved word interpretation.

> perl -wE 'my $p={};my ($dat, $tim) =  @{$p}{dat,tim};' 
Unquoted string "dat" may clash with future reserved word at -e line 1.
Unquoted string "tim" may clash with future reserved word at -e line 1.

>From perldata, "an identifier within such curlies is forced to be a 
string, as is any simple identifier within a hash subscript.  So
if the above recognizes that 'dat' and 'tim' are simple identifiers
(which it seems to by acknowledging them 2 parseable entities and not
the single entity 'dat,tim', then it would seem that, as in a single
hash, $days{Feb}", keynames should not require quotes.

Currently, a workaround for a hash slice would be to enclose the hash
terms in qw(key1 key2 key3) in the braces, but that's a bit ugly.

[Please do not change anything below this line]
This perlbug was built using Perl 5.14.2 - Sat Oct 29 15:59:10 UTC 2011
It is being executed now by  Perl 5.14.2 - Sat Oct 29 15:55:30 UTC 2011.

Site configuration information for perl 5.14.2:

Configured by abuild at Sat Oct 29 15:55:30 UTC 2011.

Summary of my perl5 (revision 5 version 14 subversion 2) configuration:
    osname=linux, osvers=3.1.0-rc10-1-default, archname=x86_64-linux-thread-multi
    uname='linux build33 3.1.0-rc10-1-default #1 smp thu oct 20 08:17:26 utc 2011 (f6d77d4) x86_64 x86_64 x86_64 gnulinux '
    config_args='-ds -e -Dprefix=/usr -Dvendorprefix=/usr -Dinstallusrbinperl -Dusethreads -Di_db -Di_dbm -Di_ndbm -Di_gdbm -Duseshrplib=true -Doptimize=-fmessage-length=0 -O2 -Wall -D_FORTIFY_SOURCE=2 -fstack-protector -funwind-tables -fasynchronous-unwind-tables -g -Wall -pipe -Accflags=-DPERL_USE_SAFE_PUTENV -Dotherlibdirs=/usr/lib/perl5/site_perl'
    hint=recommended, useposix=true, d_sigaction=define
    useithreads=define, usemultiplicity=define
    useperlio=define, d_sfio=undef, uselargefiles=define, usesocks=undef
    use64bitint=define, use64bitall=define, uselongdouble=undef
    usemymalloc=n, bincompat5005=undef
    cc='cc', ccflags ='-D_REENTRANT -D_GNU_SOURCE -DPERL_USE_SAFE_PUTENV -fno-strict-aliasing -pipe -fstack-protector -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64',
    optimize='-fmessage-length=0 -O2 -Wall -D_FORTIFY_SOURCE=2 -fstack-protector -funwind-tables -fasynchronous-unwind-tables -g -Wall -pipe',
    cppflags='-D_REENTRANT -D_GNU_SOURCE -DPERL_USE_SAFE_PUTENV -fno-strict-aliasing -pipe -fstack-protector'
    ccversion='', gccversion='4.6.2', gccosandvers=''
    intsize=4, longsize=8, ptrsize=8, doublesize=8, byteorder=12345678
    d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=16
    ivtype='long', ivsize=8, nvtype='double', nvsize=8, Off_t='off_t', lseeksize=8
    alignbytes=8, prototype=define
  Linker and Libraries:
    ld='cc', ldflags =' -L/usr/local/lib64 -fstack-protector'
    libpth=/lib64 /usr/lib64 /usr/local/lib64
    libs=-lm -ldl -lcrypt -lpthread
    perllibs=-lm -ldl -lcrypt -lpthread
    libc=/lib64/, so=so, useshrplib=true,
  Dynamic Linking:
    dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags='-Wl,-E -Wl,-rpath,/usr/lib/perl5/5.14.2/x86_64-linux-thread-multi/CORE'
    cccdlflags='-fPIC', lddlflags='-shared -L/usr/local/lib64 -fstack-protector'

Locally applied patches:

@INC for perl 5.14.2:

Environment for perl 5.14.2:
    LANGUAGE (unset)
    LD_LIBRARY_PATH (unset)
    LOGDIR (unset)
    PERL_BADLANG (unset)

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