Re: Simple boolean expression evaluator

On Tue, 21 Jun 2005 11:26:11 -0400, "Richard Marchand"
<richardm@xxxxxxxxxxx> wrote:


>I am searching for a simple function that will take a string of boolean
>expressions like:
>
> "((True of false) and (false or false)) or (true and false)"
>
>And return a boolean result.
>

I have a class that implements this kind of search, will post it to
..attachments in a minute. It's based on example code by Julian Bucknall
(published in Delphi Magazine once), which I modified to break into
specialized classes and to make the evaluator event-driven. I'm using it in
an application without a problem, but it's not very fast and the way it
works doesn't allow for shortcut evaluation. Feel free to use it for any
purpose if it does what you need.


..marek

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