Author: larry
Date: Mon Nov 13 10:14:35 2006
New Revision: 13475
Modified:
doc/trunk/design/syn/S03.pod
Log:
Added missing generic boolean comparisons as noted by dduncan++.
Modified: doc/trunk/design/syn/S03.pod
==============================================================================
--- doc/trunk/design/syn/S03.pod (original)
+++ doc/trunk/design/syn/S03.pod Mon Nov 13 10:14:35 2006
@@ -12,7 +12,7 @@
Maintainer: Larry Wall <[EMAIL PROTECTED]>
Date: 8 Mar 2004
- Last Modified: 2 Nov 2006
+ Last Modified: 13 Nov 2006
Number: 3
Version: 74
@@ -436,13 +436,18 @@
returns C<Order::Increase>, C<Order::Same>, or C<Order::Decrease>
(which numerify to -1, 0, or +1).
-=item * the C<leg> operator (less than, equal, or greater) is defined
+=item * The C<leg> operator (less than, equal, or greater) is defined
in terms of C<cmp>, so C<$a leg $b> is now defined as C<~$a cmp ~$b>.
The sort operator still defaults to C<cmp> rather than C<leg>. The
C<< <=> >> operator's semantics are unchanged except that it returns
an C<Order> value as described above. In other words, C<< $a <=> $b >>
is now equivalent to C<+$a cmp +$b>.
+=item * For boolean comparison operators with non-coercive C<cmp>
+semantics, use the generic C<before> and C<after> infix operators.
+As ordinary infix operators these may be negated (C<!before> and C<!after>)
+as well as reduced (C<[before]> and C<[after]>).
+
=item * Binary C<< => >> is no longer just a "fancy comma". It now
constructs a C<Pair> object that can, among other things, be used to
pass named arguments to functions. It provides scalar context to both sides.
@@ -1663,6 +1668,7 @@
fff ^fff fff^ ^fff^
chaining binary != == < <= > >=
eq ne lt le gt ge
+ before after
~~ =:= === eqv
!== !~~ !eq !=:= !=== !eqv etc.
tight and &&
