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#! perl
# Getopt::Long.pm -- Universal options parsing
# Author : Johan Vromans
# Created On : Tue Sep 11 15:00:12 1990
# Last Modified By: Johan Vromans
# Last Modified On: Tue Aug 18 14:48:05 2020
# Update Count : 1739
# Status : Released
################ Module Preamble ################
use 5.004;
use strict;
use warnings;
package Getopt::Long;
use vars qw($VERSION);
$VERSION = 2.52;
# For testing versions only.
use vars qw($VERSION_STRING);
$VERSION_STRING = "2.52";
use Exporter;
use vars qw(@ISA @EXPORT @EXPORT_OK);
@ISA = qw(Exporter);
# Exported subroutines.
sub GetOptions(@); # always
sub GetOptionsFromArray(@); # on demand
sub GetOptionsFromString(@); # on demand
sub Configure(@); # on demand
sub HelpMessage(@); # on demand
sub VersionMessage(@); # in demand
BEGIN {
# Init immediately so their contents can be used in the 'use vars' below.
@EXPORT = qw(&GetOptions $REQUIRE_ORDER $PERMUTE $RETURN_IN_ORDER);
@EXPORT_OK = qw(&HelpMessage &VersionMessage &Configure
&GetOptionsFromArray &GetOptionsFromString);
}
# User visible variables.
use vars @EXPORT, @EXPORT_OK;
use vars qw($error $debug $major_version $minor_version);
# Deprecated visible variables.
use vars qw($autoabbrev $getopt_compat $ignorecase $bundling $order
$passthrough);
# Official invisible variables.
use vars qw($genprefix $caller $gnu_compat $auto_help $auto_version $longprefix);
# Really invisible variables.
my $bundling_values;
# Public subroutines.
sub config(@); # deprecated name
# Private subroutines.
sub ConfigDefaults();
sub ParseOptionSpec($$);
sub OptCtl($);
sub FindOption($$$$$);
sub ValidValue ($$$$$);
################ Local Variables ################
# $requested_version holds the version that was mentioned in the 'use'
# or 'require', if any. It can be used to enable or disable specific
# features.
my $requested_version = 0;
################ Resident subroutines ################
sub ConfigDefaults() {
# Handle POSIX compliancy.
if ( defined $ENV{"POSIXLY_CORRECT"} ) {
$genprefix = "(--|-)";
$autoabbrev = 0; # no automatic abbrev of options
$bundling = 0; # no bundling of single letter switches
$getopt_compat = 0; # disallow '+' to start options
$order = $REQUIRE_ORDER;
}
else {
$genprefix = "(--|-|\\+)";
$autoabbrev = 1; # automatic abbrev of options
$bundling = 0; # bundling off by default
$getopt_compat = 1; # allow '+' to start options
$order = $PERMUTE;
}
# Other configurable settings.
$debug = 0; # for debugging
$error = 0; # error tally
$ignorecase = 1; # ignore case when matching options
$passthrough = 0; # leave unrecognized options alone
$gnu_compat = 0; # require --opt=val if value is optional
$longprefix = "(--)"; # what does a long prefix look like
$bundling_values = 0; # no bundling of values
}
# Override import.
sub import {
my $pkg = shift; # package
my @syms = (); # symbols to import
my @config = (); # configuration
my $dest = \@syms; # symbols first
for ( @_ ) {
if ( $_ eq ':config' ) {
$dest = \@config; # config next
next;
}
push(@$dest, $_); # push
}
# Hide one level and call super.
local $Exporter::ExportLevel = 1;
push(@syms, qw(&GetOptions)) if @syms; # always export GetOptions
$requested_version = 0;
$pkg->SUPER::import(@syms);
# And configure.
Configure(@config) if @config;
}
################ Initialization ################
# Values for $order. See GNU getopt.c for details.
($REQUIRE_ORDER, $PERMUTE, $RETURN_IN_ORDER) = (0..2);
# Version major/minor numbers.
($major_version, $minor_version) = $VERSION =~ /^(\d+)\.(\d+)/;
ConfigDefaults();
################ OO Interface ################
package Getopt::Long::Parser;
# Store a copy of the default configuration. Since ConfigDefaults has
# just been called, what we get from Configure is the default.
my $default_config = do {
Getopt::Long::Configure ()
};
sub new {
my $that = shift;
my $class = ref($that) || $that;
my %atts = @_;
# Register the callers package.
my $self = { caller_pkg => (caller)[0] };
bless ($self, $class);
# Process config attributes.
if ( defined $atts{config} ) {
my $save = Getopt::Long::Configure ($default_config, @{$atts{config}});
$self->{settings} = Getopt::Long::Configure ($save);
delete ($atts{config});
}
# Else use default config.
else {
$self->{settings} = $default_config;
}
if ( %atts ) { # Oops
die(__PACKAGE__.": unhandled attributes: ".
join(" ", sort(keys(%atts)))."\n");
}
$self;
}
sub configure {
my ($self) = shift;
# Restore settings, merge new settings in.
my $save = Getopt::Long::Configure ($self->{settings}, @_);
# Restore orig config and save the new config.
$self->{settings} = Getopt::Long::Configure ($save);
}
sub getoptions {
my ($self) = shift;
return $self->getoptionsfromarray(\@ARGV, @_);
}
sub getoptionsfromarray {
my ($self) = shift;
# Restore config settings.
my $save = Getopt::Long::Configure ($self->{settings});
# Call main routine.
my $ret = 0;
$Getopt::Long::caller = $self->{caller_pkg};
eval {
# Locally set exception handler to default, otherwise it will
# be called implicitly here, and again explicitly when we try
# to deliver the messages.
local ($SIG{__DIE__}) = 'DEFAULT';
$ret = Getopt::Long::GetOptionsFromArray (@_);
};
# Restore saved settings.
Getopt::Long::Configure ($save);
# Handle errors and return value.
die ($@) if $@;
return $ret;
}
package Getopt::Long;
################ Back to Normal ################
# Indices in option control info.
# Note that ParseOptions uses the fields directly. Search for 'hard-wired'.
use constant CTL_TYPE => 0;
#use constant CTL_TYPE_FLAG => '';
#use constant CTL_TYPE_NEG => '!';
#use constant CTL_TYPE_INCR => '+';
#use constant CTL_TYPE_INT => 'i';
#use constant CTL_TYPE_INTINC => 'I';
#use constant CTL_TYPE_XINT => 'o';
#use constant CTL_TYPE_FLOAT => 'f';
#use constant CTL_TYPE_STRING => 's';
use constant CTL_CNAME => 1;
use constant CTL_DEFAULT => 2;
use constant CTL_DEST => 3;
use constant CTL_DEST_SCALAR => 0;
use constant CTL_DEST_ARRAY => 1;
use constant CTL_DEST_HASH => 2;
use constant CTL_DEST_CODE => 3;
use constant CTL_AMIN => 4;
use constant CTL_AMAX => 5;
# FFU.
#use constant CTL_RANGE => ;
#use constant CTL_REPEAT => ;
# Rather liberal patterns to match numbers.
use constant PAT_INT => "[-+]?_*[0-9][0-9_]*";
use constant PAT_XINT =>
"(?:".
"[-+]?_*[1-9][0-9_]*".
"|".
"0x_*[0-9a-f][0-9a-f_]*".
"|".
"0b_*[01][01_]*".
"|".
"0[0-7_]*".
")";
use constant PAT_FLOAT =>
"[-+]?". # optional sign
"(?=[0-9.])". # must start with digit or dec.point
"[0-9_]*". # digits before the dec.point
"(\.[0-9_]+)?". # optional fraction
"([eE][-+]?[0-9_]+)?"; # optional exponent
sub GetOptions(@) {
# Shift in default array.
unshift(@_, \@ARGV);
# Try to keep caller() and Carp consistent.
goto &GetOptionsFromArray;
}
sub GetOptionsFromString(@) {
my ($string) = shift;
require Text::ParseWords;
my $args = [ Text::ParseWords::shellwords($string) ];
$caller ||= (caller)[0]; # current context
my $ret = GetOptionsFromArray($args, @_);
return ( $ret, $args ) if wantarray;
if ( @$args ) {
$ret = 0;
warn("GetOptionsFromString: Excess data \"@$args\" in string \"$string\"\n");
}
$ret;
}
sub GetOptionsFromArray(@) {
my ($argv, @optionlist) = @_; # local copy of the option descriptions
my $argend = '--'; # option list terminator
my %opctl = (); # table of option specs
my $pkg = $caller || (caller)[0]; # current context
# Needed if linkage is omitted.
my @ret = (); # accum for non-options
my %linkage; # linkage
my $userlinkage; # user supplied HASH
my $opt; # current option
my $prefix = $genprefix; # current prefix
$error = '';
if ( $debug ) {
# Avoid some warnings if debugging.
local ($^W) = 0;
print STDERR
("Getopt::Long $Getopt::Long::VERSION_STRING ",
"called from package \"$pkg\".",
"\n ",
"argv: ",
defined($argv)
? UNIVERSAL::isa( $argv, 'ARRAY' ) ? "(@$argv)" : $argv
: "<undef>",
"\n ",
"autoabbrev=$autoabbrev,".
"bundling=$bundling,",
"bundling_values=$bundling_values,",
"getopt_compat=$getopt_compat,",
"gnu_compat=$gnu_compat,",
"order=$order,",
"\n ",
"ignorecase=$ignorecase,",
"requested_version=$requested_version,",
"passthrough=$passthrough,",
"genprefix=\"$genprefix\",",
"longprefix=\"$longprefix\".",
"\n");
}
# Check for ref HASH as first argument.
# First argument may be an object. It's OK to use this as long
# as it is really a hash underneath.
$userlinkage = undef;
if ( @optionlist && ref($optionlist[0]) and
UNIVERSAL::isa($optionlist[0],'HASH') ) {
$userlinkage = shift (@optionlist);
print STDERR ("=> user linkage: $userlinkage\n") if $debug;
}
# See if the first element of the optionlist contains option
# starter characters.
# Be careful not to interpret '<>' as option starters.
if ( @optionlist && $optionlist[0] =~ /^\W+$/
&& !($optionlist[0] eq '<>'
&& @optionlist > 0
&& ref($optionlist[1])) ) {
$prefix = shift (@optionlist);
# Turn into regexp. Needs to be parenthesized!
$prefix =~ s/(\W)/\\$1/g;
$prefix = "([" . $prefix . "])";
print STDERR ("=> prefix=\"$prefix\"\n") if $debug;
}
# Verify correctness of optionlist.
%opctl = ();
while ( @optionlist ) {
my $opt = shift (@optionlist);
unless ( defined($opt) ) {
$error .= "Undefined argument in option spec\n";
next;
}
# Strip leading prefix so people can specify "--foo=i" if they like.
$opt = $+ if $opt =~ /^$prefix+(.*)$/s;
if ( $opt eq '<>' ) {
if ( (defined $userlinkage)
&& !(@optionlist > 0 && ref($optionlist[0]))
&& (exists $userlinkage->{$opt})
&& ref($userlinkage->{$opt}) ) {
unshift (@optionlist, $userlinkage->{$opt});
}
unless ( @optionlist > 0
&& ref($optionlist[0]) && ref($optionlist[0]) eq 'CODE' ) {
$error .= "Option spec <> requires a reference to a subroutine\n";
# Kill the linkage (to avoid another error).
shift (@optionlist)
if @optionlist && ref($optionlist[0]);
next;
}
$linkage{'<>'} = shift (@optionlist);
next;
}
# Parse option spec.
my ($name, $orig) = ParseOptionSpec ($opt, \%opctl);
unless ( defined $name ) {
# Failed. $orig contains the error message. Sorry for the abuse.
$error .= $orig;
# Kill the linkage (to avoid another error).
shift (@optionlist)
if @optionlist && ref($optionlist[0]);
next;
}
# If no linkage is supplied in the @optionlist, copy it from
# the userlinkage if available.
if ( defined $userlinkage ) {
unless ( @optionlist > 0 && ref($optionlist[0]) ) {
if ( exists $userlinkage->{$orig} &&
ref($userlinkage->{$orig}) ) {
print STDERR ("=> found userlinkage for \"$orig\": ",
"$userlinkage->{$orig}\n")
if $debug;
unshift (@optionlist, $userlinkage->{$orig});
}
else {
# Do nothing. Being undefined will be handled later.
next;
}
}
}
# Copy the linkage. If omitted, link to global variable.
if ( @optionlist > 0 && ref($optionlist[0]) ) {
print STDERR ("=> link \"$orig\" to $optionlist[0]\n")
if $debug;
my $rl = ref($linkage{$orig} = shift (@optionlist));
if ( $rl eq "ARRAY" ) {
$opctl{$name}[CTL_DEST] = CTL_DEST_ARRAY;
}
elsif ( $rl eq "HASH" ) {
$opctl{$name}[CTL_DEST] = CTL_DEST_HASH;
}
elsif ( $rl eq "SCALAR" || $rl eq "REF" ) {
# if ( $opctl{$name}[CTL_DEST] == CTL_DEST_ARRAY ) {
# my $t = $linkage{$orig};
# $$t = $linkage{$orig} = [];
# }
# elsif ( $opctl{$name}[CTL_DEST] == CTL_DEST_HASH ) {
# }
# else {
# Ok.
# }
}
elsif ( $rl eq "CODE" ) {
# Ok.
}
else {
$error .= "Invalid option linkage for \"$opt\"\n";
}
}
else {
# Link to global $opt_XXX variable.
# Make sure a valid perl identifier results.
my $ov = $orig;
$ov =~ s/\W/_/g;
if ( $opctl{$name}[CTL_DEST] == CTL_DEST_ARRAY ) {
print STDERR ("=> link \"$orig\" to \@$pkg","::opt_$ov\n")
if $debug;
eval ("\$linkage{\$orig} = \\\@".$pkg."::opt_$ov;");
}
elsif ( $opctl{$name}[CTL_DEST] == CTL_DEST_HASH ) {
print STDERR ("=> link \"$orig\" to \%$pkg","::opt_$ov\n")
if $debug;
eval ("\$linkage{\$orig} = \\\%".$pkg."::opt_$ov;");
}
else {
print STDERR ("=> link \"$orig\" to \$$pkg","::opt_$ov\n")
if $debug;
eval ("\$linkage{\$orig} = \\\$".$pkg."::opt_$ov;");
}
}
if ( $opctl{$name}[CTL_TYPE] eq 'I'
&& ( $opctl{$name}[CTL_DEST] == CTL_DEST_ARRAY
|| $opctl{$name}[CTL_DEST] == CTL_DEST_HASH )
) {
$error .= "Invalid option linkage for \"$opt\"\n";
}
}
$error .= "GetOptionsFromArray: 1st parameter is not an array reference\n"
unless $argv && UNIVERSAL::isa( $argv, 'ARRAY' );
# Bail out if errors found.
die ($error) if $error;
$error = 0;
# Supply --version and --help support, if needed and allowed.
if ( defined($auto_version) ? $auto_version : ($requested_version >= 2.3203) ) {
if ( !defined($opctl{version}) ) {
$opctl{version} = ['','version',0,CTL_DEST_CODE,undef];
$linkage{version} = \&VersionMessage;
}
$auto_version = 1;
}
if ( defined($auto_help) ? $auto_help : ($requested_version >= 2.3203) ) {
if ( !defined($opctl{help}) && !defined($opctl{'?'}) ) {
$opctl{help} = $opctl{'?'} = ['','help',0,CTL_DEST_CODE,undef];
$linkage{help} = \&HelpMessage;
}
$auto_help = 1;
}
# Show the options tables if debugging.
if ( $debug ) {
my ($arrow, $k, $v);
$arrow = "=> ";
while ( ($k,$v) = each(%opctl) ) {
print STDERR ($arrow, "\$opctl{$k} = $v ", OptCtl($v), "\n");
$arrow = " ";
}
}
# Process argument list
my $goon = 1;
while ( $goon && @$argv > 0 ) {
# Get next argument.
$opt = shift (@$argv);
print STDERR ("=> arg \"", $opt, "\"\n") if $debug;
# Double dash is option list terminator.
if ( defined($opt) && $opt eq $argend ) {
push (@ret, $argend) if $passthrough;
last;
}
# Look it up.
my $tryopt = $opt;
my $found; # success status
my $key; # key (if hash type)
my $arg; # option argument
my $ctl; # the opctl entry
($found, $opt, $ctl, $arg, $key) =
FindOption ($argv, $prefix, $argend, $opt, \%opctl);
if ( $found ) {
# FindOption undefines $opt in case of errors.
next unless defined $opt;
my $argcnt = 0;
while ( defined $arg ) {
# Get the canonical name.
my $given = $opt;
print STDERR ("=> cname for \"$opt\" is ") if $debug;
$opt = $ctl->[CTL_CNAME];
print STDERR ("\"$ctl->[CTL_CNAME]\"\n") if $debug;
if ( defined $linkage{$opt} ) {
print STDERR ("=> ref(\$L{$opt}) -> ",
ref($linkage{$opt}), "\n") if $debug;
if ( ref($linkage{$opt}) eq 'SCALAR'
|| ref($linkage{$opt}) eq 'REF' ) {
if ( $ctl->[CTL_TYPE] eq '+' ) {
print STDERR ("=> \$\$L{$opt} += \"$arg\"\n")
if $debug;
if ( defined ${$linkage{$opt}} ) {
${$linkage{$opt}} += $arg;
}
else {
${$linkage{$opt}} = $arg;
}
}
elsif ( $ctl->[CTL_DEST] == CTL_DEST_ARRAY ) {
print STDERR ("=> ref(\$L{$opt}) auto-vivified",
" to ARRAY\n")
if $debug;
my $t = $linkage{$opt};
$$t = $linkage{$opt} = [];
print STDERR ("=> push(\@{\$L{$opt}, \"$arg\")\n")
if $debug;
push (@{$linkage{$opt}}, $arg);
}
elsif ( $ctl->[CTL_DEST] == CTL_DEST_HASH ) {
print STDERR ("=> ref(\$L{$opt}) auto-vivified",
" to HASH\n")
if $debug;
my $t = $linkage{$opt};
$$t = $linkage{$opt} = {};
print STDERR ("=> \$\$L{$opt}->{$key} = \"$arg\"\n")
if $debug;
$linkage{$opt}->{$key} = $arg;
}
else {
print STDERR ("=> \$\$L{$opt} = \"$arg\"\n")
if $debug;
${$linkage{$opt}} = $arg;
}
}
elsif ( ref($linkage{$opt}) eq 'ARRAY' ) {
print STDERR ("=> push(\@{\$L{$opt}, \"$arg\")\n")
if $debug;
push (@{$linkage{$opt}}, $arg);
}
elsif ( ref($linkage{$opt}) eq 'HASH' ) {
print STDERR ("=> \$\$L{$opt}->{$key} = \"$arg\"\n")
if $debug;
$linkage{$opt}->{$key} = $arg;
}
elsif ( ref($linkage{$opt}) eq 'CODE' ) {
print STDERR ("=> &L{$opt}(\"$opt\"",
$ctl->[CTL_DEST] == CTL_DEST_HASH ? ", \"$key\"" : "",
", \"$arg\")\n")
if $debug;
my $eval_error = do {
local $@;
local $SIG{__DIE__} = 'DEFAULT';
eval {
&{$linkage{$opt}}
(Getopt::Long::CallBack->new
(name => $opt,
given => $given,
ctl => $ctl,
opctl => \%opctl,
linkage => \%linkage,
prefix => $prefix,
),
$ctl->[CTL_DEST] == CTL_DEST_HASH ? ($key) : (),
$arg);
};
$@;
};
print STDERR ("=> die($eval_error)\n")
if $debug && $eval_error ne '';
if ( $eval_error =~ /^!/ ) {
if ( $eval_error =~ /^!FINISH\b/ ) {
$goon = 0;
}
}
elsif ( $eval_error ne '' ) {
warn ($eval_error);
$error++;
}
}
else {
print STDERR ("Invalid REF type \"", ref($linkage{$opt}),
"\" in linkage\n");
die("Getopt::Long -- internal error!\n");
}
}
# No entry in linkage means entry in userlinkage.
elsif ( $ctl->[CTL_DEST] == CTL_DEST_ARRAY ) {
if ( defined $userlinkage->{$opt} ) {
print STDERR ("=> push(\@{\$L{$opt}}, \"$arg\")\n")
if $debug;
push (@{$userlinkage->{$opt}}, $arg);
}
else {
print STDERR ("=>\$L{$opt} = [\"$arg\"]\n")
if $debug;
$userlinkage->{$opt} = [$arg];
}
}
elsif ( $ctl->[CTL_DEST] == CTL_DEST_HASH ) {
if ( defined $userlinkage->{$opt} ) {
print STDERR ("=> \$L{$opt}->{$key} = \"$arg\"\n")
if $debug;
$userlinkage->{$opt}->{$key} = $arg;
}
else {
print STDERR ("=>\$L{$opt} = {$key => \"$arg\"}\n")
if $debug;
$userlinkage->{$opt} = {$key => $arg};
}
}
else {
if ( $ctl->[CTL_TYPE] eq '+' ) {
print STDERR ("=> \$L{$opt} += \"$arg\"\n")
if $debug;
if ( defined $userlinkage->{$opt} ) {
$userlinkage->{$opt} += $arg;
}
else {
$userlinkage->{$opt} = $arg;
}
}
else {
print STDERR ("=>\$L{$opt} = \"$arg\"\n") if $debug;
$userlinkage->{$opt} = $arg;
}
}
$argcnt++;
last if $argcnt >= $ctl->[CTL_AMAX] && $ctl->[CTL_AMAX] != -1;
undef($arg);
# Need more args?
if ( $argcnt < $ctl->[CTL_AMIN] ) {
if ( @$argv ) {
if ( ValidValue($ctl, $argv->[0], 1, $argend, $prefix) ) {
$arg = shift(@$argv);
if ( $ctl->[CTL_TYPE] =~ /^[iIo]$/ ) {
$arg =~ tr/_//d;
$arg = $ctl->[CTL_TYPE] eq 'o' && $arg =~ /^0/
? oct($arg)
: 0+$arg
}
($key,$arg) = $arg =~ /^([^=]+)=(.*)/
if $ctl->[CTL_DEST] == CTL_DEST_HASH;
next;
}
warn("Value \"$$argv[0]\" invalid for option $opt\n");
$error++;
}
else {
warn("Insufficient arguments for option $opt\n");
$error++;
}
}
# Any more args?
if ( @$argv && ValidValue($ctl, $argv->[0], 0, $argend, $prefix) ) {
$arg = shift(@$argv);
if ( $ctl->[CTL_TYPE] =~ /^[iIo]$/ ) {
$arg =~ tr/_//d;
$arg = $ctl->[CTL_TYPE] eq 'o' && $arg =~ /^0/
? oct($arg)
: 0+$arg
}
($key,$arg) = $arg =~ /^([^=]+)=(.*)/
if $ctl->[CTL_DEST] == CTL_DEST_HASH;
next;
}
}
}
# Not an option. Save it if we $PERMUTE and don't have a <>.
elsif ( $order == $PERMUTE ) {
# Try non-options call-back.
my $cb;
if ( defined ($cb = $linkage{'<>'}) ) {
print STDERR ("=> &L{$tryopt}(\"$tryopt\")\n")
if $debug;
my $eval_error = do {
local $@;
local $SIG{__DIE__} = 'DEFAULT';
eval {
# The arg to <> cannot be the CallBack object
# since it may be passed to other modules that
# get confused (e.g., Archive::Tar). Well,
# it's not relevant for this callback anyway.
&$cb($tryopt);
};
$@;
};
print STDERR ("=> die($eval_error)\n")
if $debug && $eval_error ne '';
if ( $eval_error =~ /^!/ ) {
if ( $eval_error =~ /^!FINISH\b/ ) {
$goon = 0;
}
}
elsif ( $eval_error ne '' ) {
warn ($eval_error);
$error++;
}
}
else {
print STDERR ("=> saving \"$tryopt\" ",
"(not an option, may permute)\n") if $debug;
push (@ret, $tryopt);
}
next;
}
# ...otherwise, terminate.
else {
# Push this one back and exit.
unshift (@$argv, $tryopt);
return ($error == 0);
}
}
# Finish.
if ( @ret && ( $order == $PERMUTE || $passthrough ) ) {
# Push back accumulated arguments
print STDERR ("=> restoring \"", join('" "', @ret), "\"\n")
if $debug;
unshift (@$argv, @ret);
}
return ($error == 0);
}
# A readable representation of what's in an optbl.
sub OptCtl ($) {
my ($v) = @_;
my @v = map { defined($_) ? ($_) : ("<undef>") } @$v;
"[".
join(",",
"\"$v[CTL_TYPE]\"",
"\"$v[CTL_CNAME]\"",
"\"$v[CTL_DEFAULT]\"",
("\$","\@","\%","\&")[$v[CTL_DEST] || 0],
$v[CTL_AMIN] || '',
$v[CTL_AMAX] || '',
# $v[CTL_RANGE] || '',
# $v[CTL_REPEAT] || '',
). "]";
}
# Parse an option specification and fill the tables.
sub ParseOptionSpec ($$) {
my ($opt, $opctl) = @_;
# Match option spec.
if ( $opt !~ m;^
(
# Option name
(?: \w+[-\w]* )
# Aliases
(?: \| (?: . [^|!+=:]* )? )*
)?
(
# Either modifiers ...
[!+]
|
# ... or a value/dest/repeat specification
[=:] [ionfs] [@%]? (?: \{\d*,?\d*\} )?
|
# ... or an optional-with-default spec
: (?: -?\d+ | \+ ) [@%]?
)?
$;x ) {
return (undef, "Error in option spec: \"$opt\"\n");
}
my ($names, $spec) = ($1, $2);
$spec = '' unless defined $spec;
# $orig keeps track of the primary name the user specified.
# This name will be used for the internal or external linkage.
# In other words, if the user specifies "FoO|BaR", it will
# match any case combinations of 'foo' and 'bar', but if a global
# variable needs to be set, it will be $opt_FoO in the exact case
# as specified.
my $orig;
my @names;
if ( defined $names ) {
@names = split (/\|/, $names);
$orig = $names[0];
}
else {
@names = ('');
$orig = '';
}
# Construct the opctl entries.
my $entry;
if ( $spec eq '' || $spec eq '+' || $spec eq '!' ) {
# Fields are hard-wired here.
$entry = [$spec,$orig,undef,CTL_DEST_SCALAR,0,0];
}
elsif ( $spec =~ /^:(-?\d+|\+)([@%])?$/ ) {
my $def = $1;
my $dest = $2;
my $type = $def eq '+' ? 'I' : 'i';
$dest ||= '$';
$dest = $dest eq '@' ? CTL_DEST_ARRAY
: $dest eq '%' ? CTL_DEST_HASH : CTL_DEST_SCALAR;
# Fields are hard-wired here.
$entry = [$type,$orig,$def eq '+' ? undef : $def,
$dest,0,1];
}
else {
my ($mand, $type, $dest) =
$spec =~ /^([=:])([ionfs])([@%])?(\{(\d+)?(,)?(\d+)?\})?$/;
return (undef, "Cannot repeat while bundling: \"$opt\"\n")
if $bundling && defined($4);
my ($mi, $cm, $ma) = ($5, $6, $7);
return (undef, "{0} is useless in option spec: \"$opt\"\n")
if defined($mi) && !$mi && !defined($ma) && !defined($cm);
$type = 'i' if $type eq 'n';
$dest ||= '$';
$dest = $dest eq '@' ? CTL_DEST_ARRAY
: $dest eq '%' ? CTL_DEST_HASH : CTL_DEST_SCALAR;
# Default minargs to 1/0 depending on mand status.
$mi = $mand eq '=' ? 1 : 0 unless defined $mi;
# Adjust mand status according to minargs.
$mand = $mi ? '=' : ':';
# Adjust maxargs.
$ma = $mi ? $mi : 1 unless defined $ma || defined $cm;
return (undef, "Max must be greater than zero in option spec: \"$opt\"\n")
if defined($ma) && !$ma;
return (undef, "Max less than min in option spec: \"$opt\"\n")
if defined($ma) && $ma < $mi;
# Fields are hard-wired here.
$entry = [$type,$orig,undef,$dest,$mi,$ma||-1];
}
# Process all names. First is canonical, the rest are aliases.
my $dups = '';
foreach ( @names ) {
$_ = lc ($_)
if $ignorecase > (($bundling && length($_) == 1) ? 1 : 0);
if ( exists $opctl->{$_} ) {
$dups .= "Duplicate specification \"$opt\" for option \"$_\"\n";
}
if ( $spec eq '!' ) {
$opctl->{"no$_"} = $entry;
$opctl->{"no-$_"} = $entry;
$opctl->{$_} = [@$entry];
$opctl->{$_}->[CTL_TYPE] = '';
}
else {
$opctl->{$_} = $entry;
}
}
if ( $dups && $^W ) {
foreach ( split(/\n+/, $dups) ) {
warn($_."\n");
}
}
($names[0], $orig);
}
# Option lookup.
sub FindOption ($$$$$) {
# returns (1, $opt, $ctl, $arg, $key) if okay,
# returns (1, undef) if option in error,
# returns (0) otherwise.
my ($argv, $prefix, $argend, $opt, $opctl) = @_;
print STDERR ("=> find \"$opt\"\n") if $debug;
return (0) unless defined($opt);
return (0) unless $opt =~ /^($prefix)(.*)$/s;
return (0) if $opt eq "-" && !defined $opctl->{''};
$opt = substr( $opt, length($1) ); # retain taintedness
my $starter = $1;
print STDERR ("=> split \"$starter\"+\"$opt\"\n") if $debug;
my $optarg; # value supplied with --opt=value
my $rest; # remainder from unbundling
# If it is a long option, it may include the value.
# With getopt_compat, only if not bundling.
if ( ($starter=~/^$longprefix$/
|| ($getopt_compat && ($bundling == 0 || $bundling == 2)))
&& (my $oppos = index($opt, '=', 1)) > 0) {
my $optorg = $opt;
$opt = substr($optorg, 0, $oppos);
$optarg = substr($optorg, $oppos + 1); # retain tainedness
print STDERR ("=> option \"", $opt,
"\", optarg = \"$optarg\"\n") if $debug;
}
#### Look it up ###
my $tryopt = $opt; # option to try
if ( ( $bundling || $bundling_values ) && $starter eq '-' ) {
# To try overrides, obey case ignore.
$tryopt = $ignorecase ? lc($opt) : $opt;
# If bundling == 2, long options can override bundles.
if ( $bundling == 2 && length($tryopt) > 1
&& defined ($opctl->{$tryopt}) ) {
print STDERR ("=> $starter$tryopt overrides unbundling\n")
if $debug;
}
# If bundling_values, option may be followed by the value.
elsif ( $bundling_values ) {
$tryopt = $opt;
# Unbundle single letter option.
$rest = length ($tryopt) > 0 ? substr ($tryopt, 1) : '';
$tryopt = substr ($tryopt, 0, 1);
$tryopt = lc ($tryopt) if $ignorecase > 1;
print STDERR ("=> $starter$tryopt unbundled from ",
"$starter$tryopt$rest\n") if $debug;
# Whatever remains may not be considered an option.
$optarg = $rest eq '' ? undef : $rest;
$rest = undef;
}
# Split off a single letter and leave the rest for
# further processing.
else {
$tryopt = $opt;
# Unbundle single letter option.
$rest = length ($tryopt) > 0 ? substr ($tryopt, 1) : '';
$tryopt = substr ($tryopt, 0, 1);
$tryopt = lc ($tryopt) if $ignorecase > 1;
print STDERR ("=> $starter$tryopt unbundled from ",
"$starter$tryopt$rest\n") if $debug;
$rest = undef unless $rest ne '';
}
}
# Try auto-abbreviation.
elsif ( $autoabbrev && $opt ne "" ) {
# Sort the possible long option names.
my @names = sort(keys (%$opctl));
# Downcase if allowed.
$opt = lc ($opt) if $ignorecase;
$tryopt = $opt;
# Turn option name into pattern.
my $pat = quotemeta ($opt);
# Look up in option names.
my @hits = grep (/^$pat/, @names);
print STDERR ("=> ", scalar(@hits), " hits (@hits) with \"$pat\" ",
"out of ", scalar(@names), "\n") if $debug;
# Check for ambiguous results.
unless ( (@hits <= 1) || (grep ($_ eq $opt, @hits) == 1) ) {
# See if all matches are for the same option.
my %hit;
foreach ( @hits ) {
my $hit = $opctl->{$_}->[CTL_CNAME]
if defined $opctl->{$_}->[CTL_CNAME];
$hit = "no" . $hit if $opctl->{$_}->[CTL_TYPE] eq '!';
$hit{$hit} = 1;
}
# Remove auto-supplied options (version, help).
if ( keys(%hit) == 2 ) {
if ( $auto_version && exists($hit{version}) ) {
delete $hit{version};
}
elsif ( $auto_help && exists($hit{help}) ) {
delete $hit{help};
}
}
# Now see if it really is ambiguous.
unless ( keys(%hit) == 1 ) {
return (0) if $passthrough;
warn ("Option ", $opt, " is ambiguous (",
join(", ", @hits), ")\n");
$error++;
return (1, undef);
}
@hits = keys(%hit);
}
# Complete the option name, if appropriate.
if ( @hits == 1 && $hits[0] ne $opt ) {
$tryopt = $hits[0];
$tryopt = lc ($tryopt)
if $ignorecase > (($bundling && length($tryopt) == 1) ? 1 : 0);
print STDERR ("=> option \"$opt\" -> \"$tryopt\"\n")
if $debug;
}
}
# Map to all lowercase if ignoring case.
elsif ( $ignorecase ) {
$tryopt = lc ($opt);
}
# Check validity by fetching the info.
my $ctl = $opctl->{$tryopt};
unless ( defined $ctl ) {
return (0) if $passthrough;
# Pretend one char when bundling.
if ( $bundling == 1 && length($starter) == 1 ) {
$opt = substr($opt,0,1);
unshift (@$argv, $starter.$rest) if defined $rest;
}
if ( $opt eq "" ) {
warn ("Missing option after ", $starter, "\n");
}
else {
warn ("Unknown option: ", $opt, "\n");
}
$error++;
return (1, undef);
}
# Apparently valid.
$opt = $tryopt;
print STDERR ("=> found ", OptCtl($ctl),
" for \"", $opt, "\"\n") if $debug;
#### Determine argument status ####
# If it is an option w/o argument, we're almost finished with it.
my $type = $ctl->[CTL_TYPE];
my $arg;
if ( $type eq '' || $type eq '!' || $type eq '+' ) {
if ( defined $optarg ) {
return (0) if $passthrough;
warn ("Option ", $opt, " does not take an argument\n");
$error++;
undef $opt;
undef $optarg if $bundling_values;
}
elsif ( $type eq '' || $type eq '+' ) {
# Supply explicit value.
$arg = 1;
}
else {
$opt =~ s/^no-?//i; # strip NO prefix
$arg = 0; # supply explicit value
}
unshift (@$argv, $starter.$rest) if defined $rest;
return (1, $opt, $ctl, $arg);
}
# Get mandatory status and type info.
my $mand = $ctl->[CTL_AMIN];
# Check if there is an option argument available.
if ( $gnu_compat ) {
my $optargtype = 0; # none, 1 = empty, 2 = nonempty, 3 = aux
if ( defined($optarg) ) {
$optargtype = (length($optarg) == 0) ? 1 : 2;
}
elsif ( defined $rest || @$argv > 0 ) {
# GNU getopt_long() does not accept the (optional)
# argument to be passed to the option without = sign.
# We do, since not doing so breaks existing scripts.
$optargtype = 3;
}
if(($optargtype == 0) && !$mand) {
if ( $type eq 'I' ) {
# Fake incremental type.
my @c = @$ctl;
$c[CTL_TYPE] = '+';
return (1, $opt, \@c, 1);
}
my $val
= defined($ctl->[CTL_DEFAULT]) ? $ctl->[CTL_DEFAULT]
: $type eq 's' ? ''
: 0;
return (1, $opt, $ctl, $val);
}
return (1, $opt, $ctl, $type eq 's' ? '' : 0)
if $optargtype == 1; # --foo= -> return nothing
}
# Check if there is an option argument available.
if ( defined $optarg
? ($optarg eq '')
: !(defined $rest || @$argv > 0) ) {
# Complain if this option needs an argument.
# if ( $mand && !($type eq 's' ? defined($optarg) : 0) ) {
if ( $mand || $ctl->[CTL_DEST] == CTL_DEST_HASH ) {
return (0) if $passthrough;
warn ("Option ", $opt, " requires an argument\n");
$error++;
return (1, undef);
}
if ( $type eq 'I' ) {
# Fake incremental type.
my @c = @$ctl;
$c[CTL_TYPE] = '+';
return (1, $opt, \@c, 1);
}
return (1, $opt, $ctl,
defined($ctl->[CTL_DEFAULT]) ? $ctl->[CTL_DEFAULT] :
$type eq 's' ? '' : 0);
}
# Get (possibly optional) argument.
$arg = (defined $rest ? $rest
: (defined $optarg ? $optarg : shift (@$argv)));
# Get key if this is a "name=value" pair for a hash option.
my $key;
if ($ctl->[CTL_DEST] == CTL_DEST_HASH && defined $arg) {
($key, $arg) = ($arg =~ /^([^=]*)=(.*)$/s) ? ($1, $2)
: ($arg, defined($ctl->[CTL_DEFAULT]) ? $ctl->[CTL_DEFAULT] :
($mand ? undef : ($type eq 's' ? "" : 1)));
if (! defined $arg) {
warn ("Option $opt, key \"$key\", requires a value\n");
$error++;
# Push back.
unshift (@$argv, $starter.$rest) if defined $rest;
return (1, undef);
}
}
#### Check if the argument is valid for this option ####
my $key_valid = $ctl->[CTL_DEST] == CTL_DEST_HASH ? "[^=]+=" : "";
if ( $type eq 's' ) { # string
# A mandatory string takes anything.
return (1, $opt, $ctl, $arg, $key) if $mand;
# Same for optional string as a hash value
return (1, $opt, $ctl, $arg, $key)
if $ctl->[CTL_DEST] == CTL_DEST_HASH;
# An optional string takes almost anything.
return (1, $opt, $ctl, $arg, $key)
if defined $optarg || defined $rest;
return (1, $opt, $ctl, $arg, $key) if $arg eq "-"; # ??
# Check for option or option list terminator.
if ($arg eq $argend ||
$arg =~ /^$prefix.+/) {
# Push back.
unshift (@$argv, $arg);
# Supply empty value.
$arg = '';
}
}
elsif ( $type eq 'i' # numeric/integer
|| $type eq 'I' # numeric/integer w/ incr default
|| $type eq 'o' ) { # dec/oct/hex/bin value
my $o_valid = $type eq 'o' ? PAT_XINT : PAT_INT;
if ( $bundling && defined $rest
&& $rest =~ /^($key_valid)($o_valid)(.*)$/si ) {
($key, $arg, $rest) = ($1, $2, $+);
chop($key) if $key;
$arg = ($type eq 'o' && $arg =~ /^0/) ? oct($arg) : 0+$arg;
unshift (@$argv, $starter.$rest) if defined $rest && $rest ne '';
}
elsif ( $arg =~ /^$o_valid$/si ) {
$arg =~ tr/_//d;
$arg = ($type eq 'o' && $arg =~ /^0/) ? oct($arg) : 0+$arg;
}
else {
if ( defined $optarg || $mand ) {
if ( $passthrough ) {
unshift (@$argv, defined $rest ? $starter.$rest : $arg)
unless defined $optarg;
return (0);
}
warn ("Value \"", $arg, "\" invalid for option ",
$opt, " (",
$type eq 'o' ? "extended " : '',
"number expected)\n");
$error++;
# Push back.
unshift (@$argv, $starter.$rest) if defined $rest;
return (1, undef);
}
else {
# Push back.
unshift (@$argv, defined $rest ? $starter.$rest : $arg);
if ( $type eq 'I' ) {
# Fake incremental type.
my @c = @$ctl;
$c[CTL_TYPE] = '+';
return (1, $opt, \@c, 1);
}
# Supply default value.
$arg = defined($ctl->[CTL_DEFAULT]) ? $ctl->[CTL_DEFAULT] : 0;
}
}
}
elsif ( $type eq 'f' ) { # real number, int is also ok
my $o_valid = PAT_FLOAT;
if ( $bundling && defined $rest &&
$rest =~ /^($key_valid)($o_valid)(.*)$/s ) {
$arg =~ tr/_//d;
($key, $arg, $rest) = ($1, $2, $+);
chop($key) if $key;
unshift (@$argv, $starter.$rest) if defined $rest && $rest ne '';
}
elsif ( $arg =~ /^$o_valid$/ ) {
$arg =~ tr/_//d;
}
else {
if ( defined $optarg || $mand ) {
if ( $passthrough ) {
unshift (@$argv, defined $rest ? $starter.$rest : $arg)
unless defined $optarg;
return (0);
}
warn ("Value \"", $arg, "\" invalid for option ",
$opt, " (real number expected)\n");
$error++;
# Push back.
unshift (@$argv, $starter.$rest) if defined $rest;
return (1, undef);
}
else {
# Push back.
unshift (@$argv, defined $rest ? $starter.$rest : $arg);
# Supply default value.
$arg = 0.0;
}
}
}
else {
die("Getopt::Long internal error (Can't happen)\n");
}
return (1, $opt, $ctl, $arg, $key);
}
sub ValidValue ($$$$$) {
my ($ctl, $arg, $mand, $argend, $prefix) = @_;
if ( $ctl->[CTL_DEST] == CTL_DEST_HASH ) {
return 0 unless $arg =~ /[^=]+=(.*)/;
$arg = $1;
}
my $type = $ctl->[CTL_TYPE];
if ( $type eq 's' ) { # string
# A mandatory string takes anything.
return (1) if $mand;
return (1) if $arg eq "-";
# Check for option or option list terminator.
return 0 if $arg eq $argend || $arg =~ /^$prefix.+/;
return 1;
}
elsif ( $type eq 'i' # numeric/integer
|| $type eq 'I' # numeric/integer w/ incr default
|| $type eq 'o' ) { # dec/oct/hex/bin value
my $o_valid = $type eq 'o' ? PAT_XINT : PAT_INT;
return $arg =~ /^$o_valid$/si;
}
elsif ( $type eq 'f' ) { # real number, int is also ok
my $o_valid = PAT_FLOAT;
return $arg =~ /^$o_valid$/;
}
die("ValidValue: Cannot happen\n");
}
# Getopt::Long Configuration.
sub Configure (@) {
my (@options) = @_;
my $prevconfig =
[ $error, $debug, $major_version, $minor_version, $caller,
$autoabbrev, $getopt_compat, $ignorecase, $bundling, $order,
$gnu_compat, $passthrough, $genprefix, $auto_version, $auto_help,
$longprefix, $bundling_values ];
if ( ref($options[0]) eq 'ARRAY' ) {
( $error, $debug, $major_version, $minor_version, $caller,
$autoabbrev, $getopt_compat, $ignorecase, $bundling, $order,
$gnu_compat, $passthrough, $genprefix, $auto_version, $auto_help,
$longprefix, $bundling_values ) = @{shift(@options)};
}
my $opt;
foreach $opt ( @options ) {
my $try = lc ($opt);
my $action = 1;
if ( $try =~ /^no_?(.*)$/s ) {
$action = 0;
$try = $+;
}
if ( ($try eq 'default' or $try eq 'defaults') && $action ) {
ConfigDefaults ();
}
elsif ( ($try eq 'posix_default' or $try eq 'posix_defaults') ) {
local $ENV{POSIXLY_CORRECT};
$ENV{POSIXLY_CORRECT} = 1 if $action;
ConfigDefaults ();
}
elsif ( $try eq 'auto_abbrev' or $try eq 'autoabbrev' ) {
$autoabbrev = $action;
}
elsif ( $try eq 'getopt_compat' ) {
$getopt_compat = $action;
$genprefix = $action ? "(--|-|\\+)" : "(--|-)";
}
elsif ( $try eq 'gnu_getopt' ) {
if ( $action ) {
$gnu_compat = 1;
$bundling = 1;
$getopt_compat = 0;
$genprefix = "(--|-)";
$order = $PERMUTE;
$bundling_values = 0;
}
}
elsif ( $try eq 'gnu_compat' ) {
$gnu_compat = $action;
$bundling = 0;
$bundling_values = 1;
}
elsif ( $try =~ /^(auto_?)?version$/ ) {
$auto_version = $action;
}
elsif ( $try =~ /^(auto_?)?help$/ ) {
$auto_help = $action;
}
elsif ( $try eq 'ignorecase' or $try eq 'ignore_case' ) {
$ignorecase = $action;
}
elsif ( $try eq 'ignorecase_always' or $try eq 'ignore_case_always' ) {
$ignorecase = $action ? 2 : 0;
}
elsif ( $try eq 'bundling' ) {
$bundling = $action;
$bundling_values = 0 if $action;
}
elsif ( $try eq 'bundling_override' ) {
$bundling = $action ? 2 : 0;
$bundling_values = 0 if $action;
}
elsif ( $try eq 'bundling_values' ) {
$bundling_values = $action;
$bundling = 0 if $action;
}
elsif ( $try eq 'require_order' ) {
$order = $action ? $REQUIRE_ORDER : $PERMUTE;
}
elsif ( $try eq 'permute' ) {
$order = $action ? $PERMUTE : $REQUIRE_ORDER;
}
elsif ( $try eq 'pass_through' or $try eq 'passthrough' ) {
$passthrough = $action;
}
elsif ( $try =~ /^prefix=(.+)$/ && $action ) {
$genprefix = $1;
# Turn into regexp. Needs to be parenthesized!
$genprefix = "(" . quotemeta($genprefix) . ")";
eval { '' =~ /$genprefix/; };
die("Getopt::Long: invalid pattern \"$genprefix\"\n") if $@;
}
elsif ( $try =~ /^prefix_pattern=(.+)$/ && $action ) {
$genprefix = $1;
# Parenthesize if needed.
$genprefix = "(" . $genprefix . ")"
unless $genprefix =~ /^\(.*\)$/;
eval { '' =~ m"$genprefix"; };
die("Getopt::Long: invalid pattern \"$genprefix\"\n") if $@;
}
elsif ( $try =~ /^long_prefix_pattern=(.+)$/ && $action ) {
$longprefix = $1;
# Parenthesize if needed.
$longprefix = "(" . $longprefix . ")"
unless $longprefix =~ /^\(.*\)$/;
eval { '' =~ m"$longprefix"; };
die("Getopt::Long: invalid long prefix pattern \"$longprefix\"\n") if $@;
}
elsif ( $try eq 'debug' ) {
$debug = $action;
}
else {
die("Getopt::Long: unknown or erroneous config parameter \"$opt\"\n")
}
}
$prevconfig;
}
# Deprecated name.
sub config (@) {
Configure (@_);
}
# Issue a standard message for --version.
#
# The arguments are mostly the same as for Pod::Usage::pod2usage:
#
# - a number (exit value)
# - a string (lead in message)
# - a hash with options. See Pod::Usage for details.
#
sub VersionMessage(@) {
# Massage args.
my $pa = setup_pa_args("version", @_);
my $v = $main::VERSION;
my $fh = $pa->{-output} ||
( ($pa->{-exitval} eq "NOEXIT" || $pa->{-exitval} < 2) ? \*STDOUT : \*STDERR );
print $fh (defined($pa->{-message}) ? $pa->{-message} : (),
$0, defined $v ? " version $v" : (),
"\n",
"(", __PACKAGE__, "::", "GetOptions",
" version ",
defined($Getopt::Long::VERSION_STRING)
? $Getopt::Long::VERSION_STRING : $VERSION, ";",
" Perl version ",
$] >= 5.006 ? sprintf("%vd", $^V) : $],
")\n");
exit($pa->{-exitval}) unless $pa->{-exitval} eq "NOEXIT";
}
# Issue a standard message for --help.
#
# The arguments are the same as for Pod::Usage::pod2usage:
#
# - a number (exit value)
# - a string (lead in message)
# - a hash with options. See Pod::Usage for details.
#
sub HelpMessage(@) {
eval {
require Pod::Usage;
import Pod::Usage;
1;
} || die("Cannot provide help: cannot load Pod::Usage\n");
# Note that pod2usage will issue a warning if -exitval => NOEXIT.
pod2usage(setup_pa_args("help", @_));
}
# Helper routine to set up a normalized hash ref to be used as
# argument to pod2usage.
sub setup_pa_args($@) {
my $tag = shift; # who's calling
# If called by direct binding to an option, it will get the option
# name and value as arguments. Remove these, if so.
@_ = () if @_ == 2 && $_[0] eq $tag;
my $pa;
if ( @_ > 1 ) {
$pa = { @_ };
}
else {
$pa = shift || {};
}
# At this point, $pa can be a number (exit value), string
# (message) or hash with options.
if ( UNIVERSAL::isa($pa, 'HASH') ) {
# Get rid of -msg vs. -message ambiguity.
$pa->{-message} = $pa->{-msg};
delete($pa->{-msg});
}
elsif ( $pa =~ /^-?\d+$/ ) {
$pa = { -exitval => $pa };
}
else {
$pa = { -message => $pa };
}
# These are _our_ defaults.
$pa->{-verbose} = 0 unless exists($pa->{-verbose});
$pa->{-exitval} = 0 unless exists($pa->{-exitval});
$pa;
}
# Sneak way to know what version the user requested.
sub VERSION {
$requested_version = $_[1] if @_ > 1;
shift->SUPER::VERSION(@_);
}
package Getopt::Long::CallBack;
sub new {
my ($pkg, %atts) = @_;
bless { %atts }, $pkg;
}
sub name {
my $self = shift;
''.$self->{name};
}
sub given {
my $self = shift;
$self->{given};
}
use overload
# Treat this object as an ordinary string for legacy API.
'""' => \&name,
fallback => 1;
1;
################ Documentation ################
|