Re: [plexil-support] Question on Plexil adapter interface

[Scott H. <Sco...@ti...>]

Chuck,

Thanks for the quick response.

Yes, I can pass the command through C++ to build the ExpressionId, but I wasn't sure how best/easiest to build it and exactly what data it needed to have inside. You mention that it can be a shared dummy - does that mean it does not have to have any relationship to the specific command that was requested to execute?

Thanks for your help,
Scott


From: Fry, Charles R. {Chuck} (ARC-TI)[Stinger Ghaffarian Technologies Inc. (SGT Inc.)] [mailto:chu...@na...]
Sent: Monday, February 10, 2014 11:45 AM
To: Catherine Szeto
Cc: ple...@li...; Scott Hetherington
Subject: Re: [plexil-support] Question on Plexil adapter interface

I'm not quite sure how you'd construct an ExpressionId from C. Can you go through a small C++ shim library?

ExpressionId is a typedef for Id<Expression>. The Id<T> template is a smart pointer. The default constructor builds  a null smart pointer. This can be used for the dest argument.

The ack argument expects an Id for a CommandHandleVariable. This has to be a real variable instance, but it can be a shared dummy.

-- Chuck

On Feb 10, 2014, at 9:36 AM, Catherine Szeto <Cat...@ti...<mailto:Cat...@ti...>> wrote:


Hello,
        Asking this on behalf of Scott:

I have a C function that calls the Plexil Adapter interface to execute commands in the Plexil Engine using the following Adapter method:

executeCommand (const LabelStr& command_name, const list<Any>& args, PLEXIL::ExpressionId dest, PLEXIL::ExpressionId ack)

The documentation says that the "dest" argument is optional but the "ack" argument must be specified.
How do I create these from C and what values are they supposed to contain?


Catherine Szeto

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Chuck Fry
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