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RFE: allow user created operators #16578

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p5pRT opened this issue Jun 4, 2018 · 1 comment
Open

RFE: allow user created operators #16578

p5pRT opened this issue Jun 4, 2018 · 1 comment
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distro-Linux type-core Wishlist

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@p5pRT
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p5pRT commented Jun 4, 2018

Migrated from rt.perl.org#133243 (status was 'new')

Searchable as RT133243$
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p5pRT commented Jun 4, 2018

From perl-diddler@tlinx.org

Created by perl-diddler@tlinx.org

I was working on a program and ran into a case where
I wanted to use a NAND operator ( ⊼ ). As a work-around,
I can use !(A^B) -- not xor, but it would be really cool if
perl had a way to define -- ESPECIALLY operators that were easily
expressible in terms of existing operators.

I don't really want to override or lost existing operators --
so being able to add new ones would be rather cool. As an aside,
unicode uses ' ⊻ ' for XOR, and ' ⊽ ' for NOR, but I could see
something like defining name=>'NOR' symbol=>⊼ imple=!^ or as a
sub NAND($$){!$_[0] ^ $_[1] }. Certainly could ressurect that
APL look & feel ;-). (OK, maybe not, but...) I would be nice
if perl could put some of those cool Unicode character to more use.

Perl Info 

Flags:
    category=core
    severity=wishlist

Site configuration information for perl 5.16.3:

Configured by law at Wed Jan 22 12:58:58 PST 2014.

Summary of my perl5 (revision 5 version 16 subversion 3) configuration:
   
  Platform:
    osname=linux, osvers=3.12.0-isht-van, archname=x86_64-linux-thread-multi-ld
    uname='linux ishtar 3.12.0-isht-van #1 smp preempt wed nov 13 16:50:51 pst 2013 x86_64 x86_64 x86_64 gnulinux '
    config_args=''
    hint=previous, useposix=true, d_sigaction=define
    useithreads=define, usemultiplicity=define
    useperlio=define, d_sfio=undef, uselargefiles=define, usesocks=undef
    use64bitint=define, use64bitall=define, uselongdouble=define
    usemymalloc=n, bincompat5005=undef
  Compiler:
    cc='gcc', ccflags ='-D_REENTRANT -D_GNU_SOURCE -fno-strict-aliasing -pipe -fstack-protector -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64',
    optimize='-g -O2',
    cppflags='-D_REENTRANT -D_GNU_SOURCE -fno-strict-aliasing -pipe -fstack-protector -D_REENTRANT -D_GNU_SOURCE -fno-strict-aliasing -pipe -fstack-protector -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -D_REENTRANT -D_GNU_SOURCE -fno-strict-aliasing -pipe -fstack-protector -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64'
    ccversion='', gccversion='4.8.1 20130909 [gcc-4_8-branch revision 202388]', 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='long double', nvsize=16, Off_t='off_t', lseeksize=8
    alignbytes=16, prototype=define
  Linker and Libraries:
    ld='gcc', ldflags ='-g -fstack-protector -fPIC'
    libpth=/usr/lib64 /lib64
    libs=-lnsl -lndbm -lgdbm -ldb -ldl -lm -lcrypt -lutil -lpthread -lc -lgdbm_compat
    perllibs=-lnsl -ldl -lm -lcrypt -lutil -lpthread -lc
    libc=/lib/libc-2.18.so, so=so, useshrplib=true, libperl=libperl-5.16.3.so
    gnulibc_version='2.18'
  Dynamic Linking:
    dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags='-Wl,-E -Wl,-rpath,/home/perl/perl-5.16.3/lib/x86_64-linux-thread-multi-ld/CORE'
    cccdlflags='-fPIC', lddlflags='-shared -g -O2 -fstack-protector -fPIC'

Locally applied patches:
    


@INC for perl 5.16.3:
    /home/law/bin/lib
    /home/perl/perl-5.16.3/lib/site/x86_64-linux-thread-multi-ld
    /home/perl/perl-5.16.3/lib/site
    /home/perl/perl-5.16.3/lib/x86_64-linux-thread-multi-ld
    /home/perl/perl-5.16.3/lib
    .


Environment for perl 5.16.3:
    HOME=/home/law
    LANG (unset)
    LANGUAGE (unset)
    LC_COLLATE=C
    LC_CTYPE=en_US.UTF-8
    LC_MESSAGES=C
    LC_MONETARY=C
    LC_NUMERIC=C
    LC_TIME=C
    LD_LIBRARY_PATH (unset)
    LOGDIR (unset)
    PATH=.:/sbin:/home/law/bin/lib:/home/law/bin:/usr/local/bin:/usr/bin:/bin:/opt/kde3/bin:/usr/sbin:/etc/local/func_lib:/home/law/lib
    PERL5OPT=-Mutf8 -CSA -I/home/law/bin/lib
    PERL_BADLANG (unset)
    SHELL=/bin/bash

@xenu xenu removed the affects-5.16 label Nov 19, 2021
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