Upgrade to Getopt-Long-2.35

[p5sagit/p5-mst-13.2.git] / lib / overload.pm

diff --git a/lib/overload.pm b/lib/overload.pm
index 1cde642..b189044 100644 (file)
--- a/lib/overload.pm
+++ b/lib/overload.pm
@@ -1,8 +1,8 @@
 package overload;
 
-our $VERSION = '1.00';
+our $VERSION = '1.03';
 
-$overload::hint_bits = 0x20000;
+$overload::hint_bits = 0x20000; # HINT_LOCALIZE_HH
 
 sub nil {}
 
@@ -84,18 +84,17 @@ sub Method {
 sub AddrRef {
   my $package = ref $_[0];
   return "$_[0]" unless $package;
-  bless $_[0], overload::Fake; # Non-overloaded package
-  my $str = "$_[0]";
-  bless $_[0], $package;       # Back
-  $package . substr $str, index $str, '=';
-}
 
-sub StrVal {
-  (OverloadedStringify($_[0]) or ref($_[0]) eq 'Regexp') ?
-    (AddrRef(shift)) :
-    "$_[0]";
+       require Scalar::Util;
+       my $class = Scalar::Util::blessed($_[0]);
+       my $class_prefix = defined($class) ? "$class=" : "";
+       my $type = Scalar::Util::reftype($_[0]);
+       my $addr = Scalar::Util::refaddr($_[0]);
+       return sprintf("$class_prefix$type(0x%x)", $addr);
 }
 
+*StrVal = *AddrRef;
+
 sub mycan {                            # Real can would leave stubs.
   my ($package, $meth) = @_;
   return \*{$package . "::$meth"} if defined &{$package . "::$meth"};
@@ -108,11 +107,11 @@ sub mycan {                               # Real can would leave stubs.
 }
 
 %constants = (
-             'integer'   =>  0x1000,
-             'float'     =>  0x2000,
-             'binary'    =>  0x4000,
-             'q'         =>  0x8000,
-             'qr'        => 0x10000,
+             'integer'   =>  0x1000, # HINT_NEW_INTEGER
+             'float'     =>  0x2000, # HINT_NEW_FLOAT
+             'binary'    =>  0x4000, # HINT_NEW_BINARY
+             'q'         =>  0x8000, # HINT_NEW_STRING
+             'qr'        => 0x10000, # HINT_NEW_RE
             );
 
 %ops = ( with_assign     => "+ - * / % ** << >> x .",
@@ -171,7 +170,7 @@ __END__
 
 =head1 NAME
 
-overload - Package for overloading perl operations
+overload - Package for overloading Perl operations
 
 =head1 SYNOPSIS
 
@@ -404,6 +403,9 @@ glob (which may require a stringification).  The same overloading
 happens both for the I<read-filehandle> syntax C<E<lt>$varE<gt>> and
 I<globbing> syntax C<E<lt>${var}E<gt>>.
 
+B<BUGS> Even in list context, the iterator is currently called only
+once and with scalar context.
+
 =item * I<Dereferencing>
 
     '${}', '@{}', '%{}', '&{}', '*{}'.
@@ -698,7 +700,10 @@ Package C<overload.pm> provides the following public functions:
 
 =item overload::StrVal(arg)
 
-Gives string value of C<arg> as in absence of stringify overloading.
+Gives string value of C<arg> as in absence of stringify overloading. If you
+are using this to get the address of a reference (useful for checking if two
+references point to the same thing) then you may be better off using
+C<Scalar::Util::refaddr()>, which is faster.
 
 =item overload::Overloaded(arg)
 
@@ -712,12 +717,12 @@ Returns C<undef> or a reference to the method that implements C<op>.
 
 =head1 Overloading constants
 
-For some application Perl parser mangles constants too much.  It is possible
-to hook into this process via overload::constant() and overload::remove_constant()
-functions.
+For some applications, the Perl parser mangles constants too much.
+It is possible to hook into this process via C<overload::constant()>
+and C<overload::remove_constant()> functions.
 
 These functions take a hash as an argument.  The recognized keys of this hash
-are
+are:
 
 =over 8
 
@@ -919,10 +924,7 @@ numeric value.)  This prints:
 =head2 Two-face references
 
 Suppose you want to create an object which is accessible as both an
-array reference and a hash reference, similar to the
-L<pseudo-hash|perlref/"Pseudo-hashes: Using an array as a hash">
-builtin Perl type.  Let's make it better than a pseudo-hash by
-allowing index 0 to be treated as a normal element.
+array reference and a hash reference.
 
   package two_refs;
   use overload '%{}' => \&gethash, '@{}' => sub { $ {shift()} };