More perldelta entries and fixes

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

diff --git a/lib/overload.pm b/lib/overload.pm
index e11c30f..0120882 100644 (file)
--- a/lib/overload.pm
+++ b/lib/overload.pm
@@ -2,8 +2,6 @@ package overload;
 
 our $VERSION = '1.04';
 
-$overload::hint_bits = 0x20000; # HINT_LOCALIZE_HH
-
 sub nil {}
 
 sub OVERLOAD {
@@ -149,7 +147,7 @@ sub constant {
     }
     else {
         $^H{$_[0]} = $_[1];
-        $^H |= $constants{$_[0]} | $overload::hint_bits;
+        $^H |= $constants{$_[0]};
     }
     shift, shift;
   }
@@ -517,11 +515,6 @@ The key C<"fallback"> governs what to do if a method for a particular
 operation is not found.  Three different cases are possible depending on
 the value of C<"fallback">:
 
-=head2 Smart Match
-
-The key C<"~~"> allows you to override the smart matching used by
-the switch construct. See L<feature>.
-
 =over 16
 
 =item * C<undef>
@@ -547,6 +540,11 @@ C<"nomethod"> value, and if this is missing, raises an exception.
 B<Note.> C<"fallback"> inheritance via @ISA is not carved in stone
 yet, see L<"Inheritance and overloading">.
 
+=head2 Smart Match
+
+The key C<"~~"> allows you to override the smart matching used by
+the switch construct. See L<feature>.
+
 =head2 Copy Constructor
 
 The value for C<"="> is a reference to a function with three
@@ -668,6 +666,23 @@ value is a scalar and not a reference.
 
 =back
 
+=head1 Minimal set of overloaded operations
+
+Since some operations can be automatically generated from others, there is
+a minimal set of operations that need to be overloaded in order to have
+the complete set of overloaded operations at one's disposal.
+Of course, the autogenerated operations may not do exactly what the user
+expects. See L<MAGIC AUTOGENERATION> above. The minimal set is:
+
+    + - * / % ** << >> x
+    <=> cmp
+    & | ^ ~
+    atan2 cos sin exp log sqrt int
+
+Additionally, you need to define at least one of string, boolean or
+numeric conversions because any one can be used to emulate the others.
+The string conversion can also be used to emulate concatenation.
+
 =head1 Losing overloading
 
 The restriction for the comparison operation is that even if, for example,