Michael G Schwern: > On Thu, Oct 03, 2002 at 05:30:49PM -0400, Trey Harris wrote: > > In a message dated Thu, 3 Oct 2002, Michael G Schwern writes: > > > > > On Thu, Oct 03, 2002 at 03:59:08PM -0400, Mike Lambert wrote: > > > > With pre/post conditions, a subclass is allowed to weaken the > > > > preconditions or strengthen the postconditions. > > > > > > How exactly does one "weaken" a precondition? > > > > You weaken a precondition by adding ORs; you strengthen a > postcondition by adding ANDs. > > As expressions in Perl run a tad beyond simple boolean logic, > could you give a concrete example?
all inherited pre-conditions pass or class' own pre-conditions pass -- Garrett Goebel IS Development Specialist ScriptPro Direct: 913.403.5261 5828 Reeds Road Main: 913.384.1008 Mission, KS 66202 Fax: 913.384.2180 www.scriptpro.com [EMAIL PROTECTED]
