Author: larry
Date: Fri Aug 18 09:09:21 2006
New Revision: 11137
Modified:
doc/trunk/design/syn/S02.pod
Log:
conjecture about conversion of undef to NaN
grammo from Mark Reed++
Modified: doc/trunk/design/syn/S02.pod
==============================================================================
--- doc/trunk/design/syn/S02.pod (original)
+++ doc/trunk/design/syn/S02.pod Fri Aug 18 09:09:21 2006
@@ -471,11 +471,16 @@
my Int $x = undef; # works
-Variables with native types does not support undefinedness: it is an error
+Variables with native types do not support undefinedness: it is an error
to assign an undefined value to them:
my int $y = undef; # dies
+Conjecture: num might support the autoconversion of undef to NaN, since
+the floating-point form can represent this concept. Might be better
+to make that conversion optional though, so that the rocket designer
+can decide whether to self-destruct immediately or shortly thereafter.
+
=item *
Every object supports a C<META> function/method that returns the
