UTF8 tr/// fixes from Inaba Hiroto.

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

diff --git a/lib/integer.pm b/lib/integer.pm
index 8949318..f019fb3 100644 (file)
--- a/lib/integer.pm
+++ b/lib/integer.pm
@@ -1,5 +1,7 @@
 package integer;
 
+our $VERSION = '1.00';
+
 =head1 NAME
 
 integer - Perl pragma to compute arithmetic in integer instead of double
@@ -28,16 +30,29 @@ code
 you'll be left with C<$x == 1.5>, C<$y == 2> and C<$z == -1>.  The $z
 case happens because unary C<-> counts as an operation.
 
+Native integer arithmetic (as provided by your C compiler) is used.
+This means that Perl's own semantics for arithmetic operations may
+not be preserved.  One common source of trouble is the modulus of
+negative numbers, which Perl does one way, but your hardware may do
+another.
+
+  % perl -le 'print (4 % -3)'
+  -2
+  % perl -Minteger -le 'print (4 % -3)'
+  1
+
 See L<perlmod/Pragmatic Modules>.
 
 =cut
 
+$integer::hint_bits = 0x1;
+
 sub import {
-    $^H |= 1;
+    $^H |= $integer::hint_bits;
 }
 
 sub unimport {
-    $^H &= ~1;
+    $^H &= ~$integer::hint_bits;
 }
 
 1;