X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2Fstrict.pm;h=d14391add44341f239af567a7ca415ee53e7c861;hb=766639d92a75ec301f7ad35ba832e55266cf3ee6;hp=2eb756c938f3a281ec0765aa0b90910089ee97a3;hpb=4b2eca7a72ce307ed58cc8af1ec195a6dc39d730;p=p5sagit%2Fp5-mst-13.2.git

diff --git a/lib/strict.pm b/lib/strict.pm
index 2eb756c..d14391a 100644
--- a/lib/strict.pm
+++ b/lib/strict.pm
@@ -1,6 +1,6 @@
 package strict;
 
-$strict::VERSION = "1.02";
+$strict::VERSION = "1.03";
 
 my %bitmask = (
 refs => 0x00000002,
@@ -16,24 +16,22 @@ sub bits {
         $bits |= $bitmask{$s} || 0;
     }
     if (@wrong) {
-        my $useno = {
-         __PACKAGE__.'::import' => 'use',
-         __PACKAGE__.'::unimport' => 'no'
-        }->{ (caller(1))[3] };
         require Carp;
-        Carp::croak("Don't know how to '$useno ".__PACKAGE__." qw(@wrong)'");
+        Carp::croak("Unknown 'strict' tag(s) '@wrong'");
     }
     $bits;
 }
 
+my $default_bits = bits(qw(refs subs vars));
+
 sub import {
     shift;
-    $^H |= bits(@_ ? @_ : qw(refs subs vars));
+    $^H |= @_ ? bits(@_) : $default_bits;
 }
 
 sub unimport {
     shift;
-    $^H &= ~ bits(@_ ? @_ : qw(refs subs vars));
+    $^H &= ~ (@_ ? bits(@_) : $default_bits);
 }
 
 1;
@@ -87,7 +85,7 @@ is allowed so that C<goto &$AUTOLOAD> would not break under stricture.
 =item C<strict vars>
 
 This generates a compile-time error if you access a variable that wasn't
-declared via "our" or C<use vars>,
+declared via C<our> or C<use vars>,
 localized via C<my()>, or wasn't fully qualified.  Because this is to avoid
 variable suicide problems and subtle dynamic scoping issues, a merely
 local() variable isn't good enough.  See L<perlfunc/my> and
@@ -112,18 +110,27 @@ exempted from this check.
 
 This disables the poetry optimization, generating a compile-time error if
 you try to use a bareword identifier that's not a subroutine, unless it
-appears in curly braces or on the left hand side of the "=E<gt>" symbol.
-
+is a simple identifier (no colons) and that it appears in curly braces or
+on the left hand side of the C<< => >> symbol.
 
     use strict 'subs';
     $SIG{PIPE} = Plumber;   	# blows up
-    $SIG{PIPE} = "Plumber"; 	# just fine: bareword in curlies always ok
+    $SIG{PIPE} = "Plumber"; 	# just fine: quoted string is always ok
     $SIG{PIPE} = \&Plumber; 	# preferred form
 
-
-
 =back
 
 See L<perlmodlib/Pragmatic Modules>.
 
+=head1 HISTORY
+
+C<strict 'subs'>, with Perl 5.6.1, erroneously permitted to use an unquoted
+compound identifier (e.g. C<Foo::Bar>) as a hash key (before C<< => >> or
+inside curlies), but without forcing it always to a literal string.
+
+Starting with Perl 5.8.1 strict is strict about its restrictions:
+if unknown restrictions are used, the strict pragma will abort with
+
+    Unknown 'strict' tag(s) '...'
+
 =cut