use 5.006;
use Carp;
use warnings;
-$VERSION = '0.76';
+use strict;
+use vars qw($VERSION $AUTOLOAD);
+$VERSION = '0.78_06';
# $DB::single=1;
my %symcache;
return $symcache{$pkg,$ref} if $symcache{$pkg,$ref};
$type ||= ref($ref);
my $found;
+ no strict 'refs';
foreach my $sym ( values %{$pkg."::"} ) {
+ use strict;
+ next unless ref ( \$sym ) eq 'GLOB';
return $symcache{$pkg,$ref} = \$sym
if *{$sym}{$type} && *{$sym}{$type} == $ref;
}
my $args = $3||'()';
_usage_AH_ $class unless $attr =~ $qual_id
&& $tieclass =~ $qual_id
- && eval "use base $tieclass; 1";
+ && eval "use base q\0$tieclass\0; 1";
if ($tieclass->isa('Exporter')) {
local $Exporter::ExportLevel = 2;
$tieclass->import(eval $args);
warn "Declaration of $name attribute in package $lastattr{pkg} may clash with future reserved word\n"
if $^W and $name !~ /[A-Z]/;
foreach ( @{$validtype{$lastattr{type}}} ) {
+ no strict 'refs';
*{"$lastattr{pkg}::_ATTR_${_}_${name}"} = $lastattr{ref};
}
%lastattr = ();
}
sub AUTOLOAD {
+ return if $AUTOLOAD =~ /::DESTROY$/;
my ($class) = $AUTOLOAD =~ m/(.*)::/g;
$AUTOLOAD =~ m/_ATTR_(.*?)_(.*)/ or
croak "Can't locate class method '$AUTOLOAD' via package '$class'";
- croak "Attribute handler '$3' doesn't handle $2 attributes";
+ croak "Attribute handler '$2' doesn't handle $1 attributes";
}
-sub DESTROY {}
-
-my $builtin = qr/lvalue|method|locked/;
+my $builtin = qr/lvalue|method|locked|unique|shared/;
sub _gen_handler_AH_() {
return sub {
_resolve_lastattr;
my ($pkg, $ref, @attrs) = @_;
+ my (undef, $filename, $linenum) = caller 2;
foreach (@attrs) {
my ($attr, $data) = /^([a-z_]\w*)(?:[(](.*)[)])?$/is or next;
if ($attr eq 'ATTR') {
+ no strict 'refs';
$data ||= "ANY";
$raw{$ref} = $data =~ s/\s*,?\s*RAWDATA\s*,?\s*//;
$phase{$ref}{BEGIN} = 1
%lastattr=(pkg=>$pkg,ref=>$ref,type=>$data);
}
else {
- my $handler = $pkg->can($attr);
+ my $type = ref $ref;
+ my $handler = $pkg->can("_ATTR_${type}_${attr}");
next unless $handler;
my $decl = [$pkg, $ref, $attr, $data,
- $raw{$handler}, $phase{$handler}];
+ $raw{$handler}, $phase{$handler}, $filename, $linenum];
foreach my $gphase (@global_phases) {
_apply_handler_AH_($decl,$gphase)
if $global_phases{$gphase} <= $global_phase;
}
}
-*{"MODIFY_${_}_ATTRIBUTES"} = _gen_handler_AH_ foreach @{$validtype{ANY}};
-push @UNIVERSAL::ISA, 'Attribute::Handlers'
- unless grep /^Attribute::Handlers$/, @UNIVERSAL::ISA;
+{
+ no strict 'refs';
+ *{"Attribute::Handlers::UNIVERSAL::MODIFY_${_}_ATTRIBUTES"} =
+ _gen_handler_AH_ foreach @{$validtype{ANY}};
+}
+push @UNIVERSAL::ISA, 'Attribute::Handlers::UNIVERSAL'
+ unless grep /^Attribute::Handlers::UNIVERSAL$/, @UNIVERSAL::ISA;
sub _apply_handler_AH_ {
my ($declaration, $phase) = @_;
- my ($pkg, $ref, $attr, $data, $raw, $handlerphase) = @$declaration;
+ my ($pkg, $ref, $attr, $data, $raw, $handlerphase, $filename, $linenum) = @$declaration;
return unless $handlerphase->{$phase};
# print STDERR "Handling $attr on $ref in $phase with [$data]\n";
my $type = ref $ref;
$attr,
(@$data>1? $data : $data->[0]),
$phase,
+ $filename,
+ $linenum,
);
return 1;
}
-CHECK {
- $global_phase++;
- _resolve_lastattr;
- _apply_handler_AH_($_,'CHECK') foreach @declarations;
-}
+{
+ no warnings 'void';
+ CHECK {
+ $global_phase++;
+ _resolve_lastattr;
+ _apply_handler_AH_($_,'CHECK') foreach @declarations;
+ }
-INIT { $global_phase++; _apply_handler_AH_($_,'INIT') foreach @declarations }
+ INIT {
+ $global_phase++;
+ _apply_handler_AH_($_,'INIT') foreach @declarations
+ }
+}
END { $global_phase++; _apply_handler_AH_($_,'END') foreach @declarations }
=head1 VERSION
-This document describes version 0.76 of Attribute::Handlers,
-released November 15, 2001.
+This document describes version 0.78 of Attribute::Handlers,
+released October 5, 2002.
=head1 SYNOPSIS
derived from that package may be given attributes with the same names as
the attribute handler subroutines, which will then be called in one of
the compilation phases (i.e. in a C<BEGIN>, C<CHECK>, C<INIT>, or C<END>
-block).
+block). (C<UNITCHECK> blocks don't correspond to a global compilation
+phase, so they can't be specified here.)
To create a handler, define it as a subroutine with the same name as
the desired attribute, and declare the subroutine itself with the
attribute C<:ATTR>. For example:
- package LoudDecl;
- use Attribute::Handlers;
-
- sub Loud :ATTR {
- my ($package, $symbol, $referent, $attr, $data, $phase) = @_;
- print STDERR
- ref($referent), " ",
- *{$symbol}{NAME}, " ",
- "($referent) ", "was just declared ",
- "and ascribed the ${attr} attribute ",
- "with data ($data)\n",
- "in phase $phase\n";
- }
+ package LoudDecl;
+ use Attribute::Handlers;
+
+ sub Loud :ATTR {
+ my ($package, $symbol, $referent, $attr, $data, $phase, $filename, $linenum) = @_;
+ print STDERR
+ ref($referent), " ",
+ *{$symbol}{NAME}, " ",
+ "($referent) ", "was just declared ",
+ "and ascribed the ${attr} attribute ",
+ "with data ($data)\n",
+ "in phase $phase\n",
+ "in file $filename at line $linenum\n";
+ }
This creates a handler for the attribute C<:Loud> in the class LoudDecl.
Thereafter, any subroutine declared with a C<:Loud> attribute in the class
=item [5]
-the name of the phase in which the handler is being invoked.
+the name of the phase in which the handler is being invoked;
+
+=item [6]
+
+the filename in which the handler is being invoked;
+
+=item [7]
+
+the line number in this file.
=back
Autoties are most commonly used in the module to which they actually tie,
and need to export their attributes to any module that calls them. To
-facilitiate this, Attribute::Handlers recognizes a special "pseudo-class" --
+facilitate this, Attribute::Handlers recognizes a special "pseudo-class" --
C<__CALLER__>, which may be specified as the qualifier of an attribute:
package Tie::Me::Kangaroo:Down::Sport;
- use Attribute::Handlers autotie => { __CALLER__::Roo => __PACKAGE__ };
+ use Attribute::Handlers autotie => { '__CALLER__::Roo' => __PACKAGE__ };
This causes Attribute::Handlers to define the C<Roo> attribute in the package
that imports the Tie::Me::Kangaroo:Down::Sport module.
+Note that it is important to quote the __CALLER__::Roo identifier because
+a bug in perl 5.8 will refuse to parse it and cause an unknown error.
+
=head3 Passing the tied object to C<tie>
Occasionally it is important to pass a reference to the object being tied
projects / p5sagit/p5-mst-13.2.git / blobdiff