Adding upstream version 4.22.0.upstream/4.22.0

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 158 insertions, 0 deletions

diff --git a/upstream/archlinux/man3/CORE.3perl b/upstream/archlinux/man3/CORE.3perl
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+.\" -*- mode: troff; coding: utf-8 -*-
+.\" Automatically generated by Pod::Man 5.01 (Pod::Simple 3.43)
+.\"
+.\" Standard preamble:
+.\" ========================================================================
+.de Sp \" Vertical space (when we can't use .PP)
+.if t .sp .5v
+.if n .sp
+..
+.de Vb \" Begin verbatim text
+.ft CW
+.nf
+.ne \\$1
+..
+.de Ve \" End verbatim text
+.ft R
+.fi
+..
+.\" \*(C` and \*(C' are quotes in nroff, nothing in troff, for use with C<>.
+.ie n \{\
+.    ds C` ""
+.    ds C' ""
+'br\}
+.el\{\
+.    ds C`
+.    ds C'
+'br\}
+.\"
+.\" Escape single quotes in literal strings from groff's Unicode transform.
+.ie \n(.g .ds Aq \(aq
+.el       .ds Aq '
+.\"
+.\" If the F register is >0, we'll generate index entries on stderr for
+.\" titles (.TH), headers (.SH), subsections (.SS), items (.Ip), and index
+.\" entries marked with X<> in POD.  Of course, you'll have to process the
+.\" output yourself in some meaningful fashion.
+.\"
+.\" Avoid warning from groff about undefined register 'F'.
+.de IX
+..
+.nr rF 0
+.if \n(.g .if rF .nr rF 1
+.if (\n(rF:(\n(.g==0)) \{\
+.    if \nF \{\
+.        de IX
+.        tm Index:\\$1\t\\n%\t"\\$2"
+..
+.        if !\nF==2 \{\
+.            nr % 0
+.            nr F 2
+.        \}
+.    \}
+.\}
+.rr rF
+.\" ========================================================================
+.\"
+.IX Title "CORE 3perl"
+.TH CORE 3perl 2024-02-11 "perl v5.38.2" "Perl Programmers Reference Guide"
+.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
+.\" way too many mistakes in technical documents.
+.if n .ad l
+.nh
+.SH NAME
+CORE \- Namespace for Perl's core routines
+.SH SYNOPSIS
+.IX Header "SYNOPSIS"
+.Vb 3
+\&    BEGIN {
+\&        *CORE::GLOBAL::hex = sub { 1; };
+\&    }
+\&
+\&    print hex("0x50"),"\en";                     # prints 1
+\&    print CORE::hex("0x50"),"\en";               # prints 80
+\&    CORE::say "yes";                            # prints yes
+\&
+\&    BEGIN { *shove = \e&CORE::push; }
+\&    shove @array, 1,2,3;                        # pushes on to @array
+.Ve
+.SH DESCRIPTION
+.IX Header "DESCRIPTION"
+The \f(CW\*(C`CORE\*(C'\fR namespace gives access to the original built-in functions of
+Perl.  The \f(CW\*(C`CORE\*(C'\fR package is built into
+Perl, and therefore you do not need to use or
+require a hypothetical "CORE" module prior to accessing routines in this
+namespace.
+.PP
+A list of the built-in functions in Perl can be found in perlfunc.
+.PP
+For all Perl keywords, a \f(CW\*(C`CORE::\*(C'\fR prefix will force the built-in function
+to be used, even if it has been overridden or would normally require the
+feature pragma.  Despite appearances, this has nothing to do with the
+CORE package, but is part of Perl's syntax.
+.PP
+For many Perl functions, the CORE package contains real subroutines.  This
+feature is new in Perl 5.16.  You can take references to these and make
+aliases.  However, some can only be called as barewords; i.e., you cannot
+use ampersand syntax (\f(CW&foo\fR) or call them through references.  See the
+\&\f(CW\*(C`shove\*(C'\fR example above.  These subroutines exist for all keywords except the following:
+.PP
+\&\f(CW\*(C`_\|_DATA_\|_\*(C'\fR, \f(CW\*(C`_\|_END_\|_\*(C'\fR, \f(CW\*(C`and\*(C'\fR, \f(CW\*(C`cmp\*(C'\fR, \f(CW\*(C`default\*(C'\fR, \f(CW\*(C`do\*(C'\fR, \f(CW\*(C`dump\*(C'\fR,
+\&\f(CW\*(C`else\*(C'\fR, \f(CW\*(C`elsif\*(C'\fR, \f(CW\*(C`eq\*(C'\fR, \f(CW\*(C`eval\*(C'\fR, \f(CW\*(C`for\*(C'\fR, \f(CW\*(C`foreach\*(C'\fR, \f(CW\*(C`format\*(C'\fR, \f(CW\*(C`ge\*(C'\fR,
+\&\f(CW\*(C`given\*(C'\fR, \f(CW\*(C`goto\*(C'\fR, \f(CW\*(C`grep\*(C'\fR, \f(CW\*(C`gt\*(C'\fR, \f(CW\*(C`if\*(C'\fR, \f(CW\*(C`last\*(C'\fR, \f(CW\*(C`le\*(C'\fR, \f(CW\*(C`local\*(C'\fR, \f(CW\*(C`lt\*(C'\fR,
+\&\f(CW\*(C`m\*(C'\fR, \f(CW\*(C`map\*(C'\fR, \f(CW\*(C`my\*(C'\fR, \f(CW\*(C`ne\*(C'\fR, \f(CW\*(C`next\*(C'\fR, \f(CW\*(C`no\*(C'\fR, \f(CW\*(C`or\*(C'\fR, \f(CW\*(C`our\*(C'\fR, \f(CW\*(C`package\*(C'\fR,
+\&\f(CW\*(C`print\*(C'\fR, \f(CW\*(C`printf\*(C'\fR, \f(CW\*(C`q\*(C'\fR, \f(CW\*(C`qq\*(C'\fR, \f(CW\*(C`qr\*(C'\fR, \f(CW\*(C`qw\*(C'\fR, \f(CW\*(C`qx\*(C'\fR, \f(CW\*(C`redo\*(C'\fR, \f(CW\*(C`require\*(C'\fR,
+\&\f(CW\*(C`return\*(C'\fR, \f(CW\*(C`s\*(C'\fR, \f(CW\*(C`say\*(C'\fR, \f(CW\*(C`sort\*(C'\fR, \f(CW\*(C`state\*(C'\fR, \f(CW\*(C`sub\*(C'\fR, \f(CW\*(C`tr\*(C'\fR, \f(CW\*(C`unless\*(C'\fR,
+\&\f(CW\*(C`until\*(C'\fR, \f(CW\*(C`use\*(C'\fR, \f(CW\*(C`when\*(C'\fR, \f(CW\*(C`while\*(C'\fR, \f(CW\*(C`x\*(C'\fR, \f(CW\*(C`xor\*(C'\fR, \f(CW\*(C`y\*(C'\fR
+.PP
+Calling with
+ampersand syntax and through references does not work for the following
+functions, as they have special syntax that cannot always be translated
+into a simple list (e.g., \f(CW\*(C`eof\*(C'\fR vs \f(CWeof()\fR):
+.PP
+\&\f(CW\*(C`chdir\*(C'\fR, \f(CW\*(C`chomp\*(C'\fR, \f(CW\*(C`chop\*(C'\fR, \f(CW\*(C`defined\*(C'\fR, \f(CW\*(C`delete\*(C'\fR, \f(CW\*(C`eof\*(C'\fR, \f(CW\*(C`exec\*(C'\fR,
+\&\f(CW\*(C`exists\*(C'\fR, \f(CW\*(C`lstat\*(C'\fR, \f(CW\*(C`split\*(C'\fR, \f(CW\*(C`stat\*(C'\fR, \f(CW\*(C`system\*(C'\fR, \f(CW\*(C`truncate\*(C'\fR, \f(CW\*(C`unlink\*(C'\fR
+.SH "OVERRIDING CORE FUNCTIONS"
+.IX Header "OVERRIDING CORE FUNCTIONS"
+To override a Perl built-in routine with your own version, you need to
+import it at compile-time.  This can be conveniently achieved with the
+\&\f(CW\*(C`subs\*(C'\fR pragma.  This will affect only the package in which you've imported
+the said subroutine:
+.PP
+.Vb 3
+\&    use subs \*(Aqchdir\*(Aq;
+\&    sub chdir { ... }
+\&    chdir $somewhere;
+.Ve
+.PP
+To override a built-in globally (that is, in all namespaces), you need to
+import your function into the \f(CW\*(C`CORE::GLOBAL\*(C'\fR pseudo-namespace at compile
+time:
+.PP
+.Vb 5
+\&    BEGIN {
+\&        *CORE::GLOBAL::hex = sub {
+\&            # ... your code here
+\&        };
+\&    }
+.Ve
+.PP
+The new routine will be called whenever a built-in function is called
+without a qualifying package:
+.PP
+.Vb 1
+\&    print hex("0x50"),"\en";                     # prints 1
+.Ve
+.PP
+In both cases, if you want access to the original, unaltered routine, use
+the \f(CW\*(C`CORE::\*(C'\fR prefix:
+.PP
+.Vb 1
+\&    print CORE::hex("0x50"),"\en";               # prints 80
+.Ve
+.SH AUTHOR
+.IX Header "AUTHOR"
+This documentation provided by Tels <nospam\-abuse@bloodgate.com> 2007.
+.SH "SEE ALSO"
+.IX Header "SEE ALSO"
+perlsub, perlfunc.