mktables: Fix-up for Unicode version 1

[perl5.git] / lib / strict.pm

diff --git a/lib/strict.pm b/lib/strict.pm
index d14391a..63a89dd 100644 (file)
--- a/lib/strict.pm
+++ b/lib/strict.pm
@@ -1,18 +1,33 @@
 package strict;
 
-$strict::VERSION = "1.03";
+$strict::VERSION = "1.07";
+
+# Verify that we're called correctly so that strictures will work.
+unless ( __FILE__ =~ /(^|[\/\\])\Q${\__PACKAGE__}\E\.pmc?$/ ) {
+    # Can't use Carp, since Carp uses us!
+    my (undef, $f, $l) = caller;
+    die("Incorrect use of pragma '${\__PACKAGE__}' at $f line $l.\n");
+}
 
 my %bitmask = (
 refs => 0x00000002,
 subs => 0x00000200,
 vars => 0x00000400
 );
+my %explicit_bitmask = (
+refs => 0x00000020,
+subs => 0x00000040,
+vars => 0x00000080
+);
 
 sub bits {
     my $bits = 0;
     my @wrong;
     foreach my $s (@_) {
-       push @wrong, $s unless exists $bitmask{$s};
+       if (exists $bitmask{$s}) {
+           $^H |= $explicit_bitmask{$s};
+       }
+       else { push @wrong, $s };
         $bits |= $bitmask{$s} || 0;
     }
     if (@wrong) {
@@ -22,16 +37,16 @@ sub bits {
     $bits;
 }
 
-my $default_bits = bits(qw(refs subs vars));
+my @default_bits = qw(refs subs vars);
 
 sub import {
     shift;
-    $^H |= @_ ? bits(@_) : $default_bits;
+    $^H |= bits(@_ ? @_ : @default_bits);
 }
 
 sub unimport {
     shift;
-    $^H &= ~ (@_ ? bits(@_) : $default_bits);
+    $^H &= ~ bits(@_ ? @_ : @default_bits);
 }
 
 1;
@@ -84,17 +99,17 @@ 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 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
-L<perlfunc/local>.
+This generates a compile-time error if you access a variable that was
+neither explicitly declared (using any of C<my>, C<our>, C<state>, or C<use
+vars>) nor fully qualified.  (Because this is to avoid variable suicide
+problems and subtle dynamic scoping issues, a merely C<local> variable isn't
+good enough.)  See L<perlfunc/my>, L<perlfunc/our>, L<perlfunc/state>,
+L<perlfunc/local>, and L<vars>.
 
     use strict 'vars';
     $X::foo = 1;        # ok, fully qualified
     my $foo = 10;       # ok, my() var
-    local $foo = 9;     # blows up
+    local $baz = 9;     # blows up, $baz not declared before
 
     package Cinna;
     our $bar;                  # Declares $bar in current package
@@ -133,4 +148,8 @@ if unknown restrictions are used, the strict pragma will abort with
 
     Unknown 'strict' tag(s) '...'
 
+As of version 1.04 (Perl 5.10), strict verifies that it is used as
+"strict" to avoid the dreaded Strict trap on case insensitive file
+systems.
+
 =cut