Re: [rules-dev] Drools syntax diagrams - redrawn
FWIW: in Perl, there are both operators as well (|| and 'or').
However, they are *not* exactly the same. Although they can be used in
any context to render a boolean expression, their priority makes the
difference. Taken from official documentation (http://bit.ly/dgw4GT):
Binary "or" returns the logical disjunction of the two
surrounding
expressions. It's equivalent to || except for the very low
precedence. This makes it useful for control flow.
Nonetheless, it must be taken into account that the distinction makes
sense for a Perl programmer. For a rules-writing guy (or girl) perhaps
the distinction is extremely obscure.
Regards.
On 22/09/2010, at 18:20, Wolfgang Laun wrote:
See my remarks inline.
On 22 September 2010 17:03, Mark Proctor <mproctor(a)codehaus.org>
wrote:
So things that are doing are:
Single binding on 'or'
$binding : ( Pattern() || Pattern() )
We are thinking of only allowing 'or' between patterns and not
allowing users to mix and match 'or' and '||'. Inside of patterns
'||' is the only connective allowed and will remain so.
OK, a clear distinction avoids confusion.
--
Bruno Unna
Public key available
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