Make tables for Perl-tailored Unicode Line_Break property

[perl5.git] / lib / strict.pm

diff --git a/lib/strict.pm b/lib/strict.pm
index bb8920b..93f2122 100644 (file)
--- a/lib/strict.pm
+++ b/lib/strict.pm
@@ -1,6 +1,6 @@
 package strict;
 
-$strict::VERSION = "1.07";
+$strict::VERSION = "1.10";
 
 # Verify that we're called correctly so that strictures will work.
 unless ( __FILE__ =~ /(^|[\/\\])\Q${\__PACKAGE__}\E\.pmc?$/ ) {
@@ -9,21 +9,46 @@ unless ( __FILE__ =~ /(^|[\/\\])\Q${\__PACKAGE__}\E\.pmc?$/ ) {
     die("Incorrect use of pragma '${\__PACKAGE__}' at $f line $l.\n");
 }
 
-my %bitmask = (
-refs => 0x00000002,
-subs => 0x00000200,
-vars => 0x00000400
-);
+my ( %bitmask, %explicit_bitmask );
+
+BEGIN {
+    %bitmask = (
+        refs => 0x00000002,
+        subs => 0x00000200,
+        vars => 0x00000400,
+    );
+
+    %explicit_bitmask = (
+        refs => 0x00000020,
+        subs => 0x00000040,
+        vars => 0x00000080,
+    );
+
+    my $bits = 0;
+    $bits |= $_ for values %bitmask;
+
+    my $inline_all_bits = $bits;
+    *all_bits = sub () { $inline_all_bits };
+
+    $bits = 0;
+    $bits |= $_ for values %explicit_bitmask;
+
+    my $inline_all_explicit_bits = $bits;
+    *all_explicit_bits = sub () { $inline_all_explicit_bits };
+}
 
 sub bits {
     my $bits = 0;
     my @wrong;
     foreach my $s (@_) {
-       if (exists $bitmask{$s}) {
-           $^H{"strict/$s"} = undef;
-       }
-       else { push @wrong, $s };
-        $bits |= $bitmask{$s} || 0;
+        if (exists $bitmask{$s}) {
+            $^H |= $explicit_bitmask{$s};
+
+            $bits |= $bitmask{$s};
+        }
+        else {
+            push @wrong, $s;
+        }
     }
     if (@wrong) {
         require Carp;
@@ -32,16 +57,21 @@ sub bits {
     $bits;
 }
 
-my @default_bits = qw(refs subs vars);
-
 sub import {
     shift;
-    $^H |= bits(@_ ? @_ : @default_bits);
+    $^H |= @_ ? &bits : all_bits | all_explicit_bits;
 }
 
 sub unimport {
     shift;
-    $^H &= ~ bits(@_ ? @_ : @default_bits);
+
+    if (@_) {
+        $^H &= ~&bits;
+    }
+    else {
+        $^H &= ~all_bits;
+        $^H |= all_explicit_bits;
+    }
 }
 
 1;
@@ -64,6 +94,10 @@ strict - Perl pragma to restrict unsafe constructs
 
 =head1 DESCRIPTION
 
+The C<strict> pragma disables certain Perl expressions that could behave
+unexpectedly or are difficult to debug, turning them into errors. The
+effect of this pragma is limited to the current file or scope block.
+
 If no import list is supplied, all possible restrictions are assumed.
 (This is the safest mode to operate in, but is sometimes too strict for
 casual programming.)  Currently, there are three possible things to be
@@ -124,9 +158,9 @@ 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: quoted string is always ok
-    $SIG{PIPE} = \&Plumber;    # preferred form
+    $SIG{PIPE} = Plumber;   # blows up
+    $SIG{PIPE} = "Plumber"; # fine: quoted string is always ok
+    $SIG{PIPE} = \&Plumber; # preferred form
 
 =back