Author: larry Date: Sun Jan 27 14:49:15 2008 New Revision: 14496 Modified: doc/trunk/design/syn/S03.pod
Log: Clarify range ending semantics for autoincrement sequences that will never match the "to" Modified: doc/trunk/design/syn/S03.pod ============================================================================== --- doc/trunk/design/syn/S03.pod (original) +++ doc/trunk/design/syn/S03.pod Sun Jan 27 14:49:15 2008 @@ -12,9 +12,9 @@ Maintainer: Larry Wall <[EMAIL PROTECTED]> Date: 8 Mar 2004 - Last Modified: 22 Jan 2008 + Last Modified: 27 Jan 2008 Number: 3 - Version: 127 + Version: 128 =head1 Overview @@ -2525,6 +2525,16 @@ An empty Range cannot be iterated; it returns a C<Failure> instead. An empty range still has a defined min and max, but the min is greater than the max. +If a range is generated using a magical autoincrement, it stops if the magical +increment would "carry" and make the next value longer than the "to" value, on the +assumption that the sequence can never match the final value exactly. Hence, +all of these produce 'A' .. 'Z': + + 'A' .. 'Z' + 'A' .. 'z' + 'A' .. '_' + 'A' .. '~' + =item * The unary C<^> operator generates a range from C<0> up to
