[perl #79534] %hash{...} slice

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[perl #79534] %hash{...} slice

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From:

Father Chrysostomos

Date:

November 21, 2010 14:00

Subject:

[perl #79534] %hash{...} slice

Message ID:

rt-3.6.HEAD-13564-1290376829-447.79534-75-0@perl.org

# New Ticket Created by  Father Chrysostomos 
# Please include the string:  [perl #79534]
# in the subject line of all future correspondence about this issue. 
# <URL: http://rt.perl.org/rt3/Ticket/Display.html?id=79534 >


Would anyone object to having this syntax:

%slice = %hash{@keys}

be equivalent to this?

%slice = map +($_ => $hash{$_}), @keys;

Does that conflict with any existing syntax?

---
Flags:
    category=core
    severity=wishlist
---
Site configuration information for perl 5.13.7:

Configured by sprout at Sat Nov 20 18:38:05 PST 2010.

Summary of my perl5 (revision 5 version 13 subversion 7) configuration:
  Commit id: 27a1175bf36db67955ca3363f80694803bdcbfb2
  Platform:
    osname=darwin, osvers=10.4.0, archname=darwin-thread-multi-2level
    uname='darwin pint.local 10.4.0 darwin kernel version 10.4.0: fri apr 23 18:28:53 pdt 2010; root:xnu-1504.7.4~1release_i386 i386 '
    config_args='-de -Dusedevel -Duseithreads -DDEBUGGING'
    hint=recommended, useposix=true, d_sigaction=define
    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 ='-fno-common -DPERL_DARWIN -no-cpp-precomp -DDEBUGGING -fno-strict-aliasing -pipe -fstack-protector -I/usr/local/include',
    optimize='-O3 -g',
    cppflags='-no-cpp-precomp -fno-common -DPERL_DARWIN -no-cpp-precomp -DDEBUGGING -fno-strict-aliasing -pipe -fstack-protector -I/usr/local/include'
    ccversion='', gccversion='4.2.1 (Apple Inc. build 5664)', gccosandvers=''
    intsize=4, longsize=4, ptrsize=4, doublesize=8, byteorder=1234
    d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=16
    ivtype='long', ivsize=4, nvtype='double', nvsize=8, Off_t='off_t', lseeksize=8
    alignbytes=8, prototype=define
  Linker and Libraries:
    ld='env MACOSX_DEPLOYMENT_TARGET=10.3 cc', ldflags =' -fstack-protector -L/usr/local/lib'
    libpth=/usr/local/lib /usr/lib
    libs=-ldbm -ldl -lm -lutil -lc
    perllibs=-ldl -lm -lutil -lc
    libc=/usr/lib/libc.dylib, so=dylib, useshrplib=false, libperl=libperl.a
    gnulibc_version=''
  Dynamic Linking:
    dlsrc=dl_dlopen.xs, dlext=bundle, d_dlsymun=undef, ccdlflags=' '
    cccdlflags=' ', lddlflags=' -bundle -undefined dynamic_lookup -L/usr/local/lib -fstack-protector'

Locally applied patches:
    

---
@INC for perl 5.13.7:
    /usr/local/lib/perl5/site_perl/5.13.7/darwin-thread-multi-2level
    /usr/local/lib/perl5/site_perl/5.13.7
    /usr/local/lib/perl5/5.13.7/darwin-thread-multi-2level
    /usr/local/lib/perl5/5.13.7
    /usr/local/lib/perl5/site_perl
    .

---
Environment for perl 5.13.7:
    DYLD_LIBRARY_PATH (unset)
    HOME=/Users/sprout
    LANG=en_US.UTF-8
    LANGUAGE (unset)
    LD_LIBRARY_PATH (unset)
    LOGDIR (unset)
    PATH=/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/usr/X11/bin:/usr/local/bin
    PERL_BADLANG (unset)
    SHELL=/bin/bash

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