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[perl #87128] Unclear note about \Q, etc., in perlretut

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From:
Father Chrysostomos
Date:
March 27, 2011 12:47
Subject:
[perl #87128] Unclear note about \Q, etc., in perlretut
Message ID:
rt-3.6.HEAD-16385-1301255222-1950.87128-75-0@perl.org
# New Ticket Created by  Father Chrysostomos 
# Please include the string:  [perl #87128]
# in the subject line of all future correspondence about this issue. 
# <URL: http://rt.perl.org/rt3/Ticket/Display.html?id=87128 >


At <http://www.nntp.perl.org/group/perl.perl5.porters/2011/03/msg170208.html>, Tom Christiansen pointed out that this paragraph I added to perlretut is missing \l and \u:

    +C<\Q>, C<\L>, C<\U> and C<\E> are actually part of the syntax of regular
    +expression I<literals>, and are not part of regexp syntax proper.  So they
    +do not work in interpolated patterns.

Then Karl Williamson pointed out that ‘regular expression literal’ is not defined anywhere.

So I would like to change this to:

C<\Q>, C<\L>, C<\l>, C<\U>, C<\u> and C<\E> are actually part of
double-quotish syntax, and not part of regexp syntax proper.  They will
work if they appear in a regular expression embeddded directly in a
program, but not when contained in a string that is interpolated in a
pattern.
---
Flags:
    category=docs
    severity=low
---
Site configuration information for perl 5.13.11:

Configured by sprout at Thu Mar 24 14:02:46 PDT 2011.

Summary of my perl5 (revision 5 version 13 subversion 11) configuration:
  Snapshot of: cc13eef1fd2ed32ab3ff15ac5caa93d2badfd986
  Platform:
    osname=darwin, osvers=10.5.0, archname=darwin-thread-multi-2level
    uname='darwin pint.local 10.5.0 darwin kernel version 10.5.0: fri nov 5 23:20:39 pdt 2010; root:xnu-1504.9.17~1release_i386 i386 '
    config_args='-Dusedevel -de -Duseithreads -Doptimize=-g'
    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 -fno-strict-aliasing -pipe -fstack-protector -I/usr/local/include',
    optimize='-g',
    cppflags='-no-cpp-precomp -fno-common -DPERL_DARWIN -no-cpp-precomp -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 5.13.11:
    /usr/local/lib/perl5/site_perl/5.13.11/darwin-thread-multi-2level
    /usr/local/lib/perl5/site_perl/5.13.11
    /usr/local/lib/perl5/5.13.11/darwin-thread-multi-2level
    /usr/local/lib/perl5/5.13.11
    /usr/local/lib/perl5/site_perl
    .

---
Environment for perl 5.13.11:
    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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