On Wed, Sep 24, 2014 at 11:41 AM, Mike Cowlishaw <[email protected]>
wrote:
>
>
> However, I want to circle back around to the discussion of the
> short-circuited AND. We can't eliminate the usage on IF/WHEN, etc., but on
> the other hand, there are certainly contexts where an and operator that
> uses short-circuit logic might be useful. One could argue that an OR
> version could also be useful. I don't believe this is possible for XOR,
> since the result always depends on both values. Are there any operator
> combinations that would make sense? Doubling up obviously doesn't work
> because && and || are already operators.
>
> Another thought: perhaps
>
> ,& and ,|
>
> are the bail-out AND and OR,
>
> and in IF and WHEN context ',' expression separator "implies" the OR (|).
>
> the IF/WHEN context is an AND, not an OR. The condition is only true if
all of the subexpressions are true, but will stop evaluating with the first
false result. An OR equivalent would stop evaluation with the first true
result.
>
> So:
>
> If a=b ,| c=d then ...
>
> would be identical to:
>
> if a=b, c=d then ...
>
> Mike
>
>
Not sure I like using the comma here...it's already feeling a bit
overloaded now. In some contexts, it's an expression delimiter, in others,
it is part of an operator. The "+&" doesn't seem too bad, but I'm not sure
if the OR case should be "-|" or also "+|". I had also considered "\&" and
"\|", since that is already used as a modifier to a lot of the comparison
operators. Of course, that opens the question on whether the logical not
character needs to be supported too.
Rick
>
>
> ------------------------------------------------------------------------------
> Meet PCI DSS 3.0 Compliance Requirements with EventLog Analyzer
> Achieve PCI DSS 3.0 Compliant Status with Out-of-the-box PCI DSS Reports
> Are you Audit-Ready for PCI DSS 3.0 Compliance? Download White paper
> Comply to PCI DSS 3.0 Requirement 10 and 11.5 with EventLog Analyzer
>
> http://pubads.g.doubleclick.net/gampad/clk?id=154622311&iu=/4140/ostg.clktrk
> _______________________________________________
> Oorexx-devel mailing list
> [email protected]
> https://lists.sourceforge.net/lists/listinfo/oorexx-devel
>
>
------------------------------------------------------------------------------
Meet PCI DSS 3.0 Compliance Requirements with EventLog Analyzer
Achieve PCI DSS 3.0 Compliant Status with Out-of-the-box PCI DSS Reports
Are you Audit-Ready for PCI DSS 3.0 Compliance? Download White paper
Comply to PCI DSS 3.0 Requirement 10 and 11.5 with EventLog Analyzer
http://pubads.g.doubleclick.net/gampad/clk?id=154622311&iu=/4140/ostg.clktrk
_______________________________________________
Oorexx-devel mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/oorexx-devel
