Re: dynamic_cast does not work in packages

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#2609

From: Remy Lebeau (TeamB)
Date: Mon, 05 Feb 2007 18:56

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"Dmitry" <dmitry@pikalevo.com> wrote in message
news:45c4f2a7@newsgroups.borland.com...

> maybe someone will give me idea how can i overcome this problem.

The only way for RTTI to work across packages is to enable runtime
packages.  It does not sound like you are doing that.

> the TDataSetActions use TMyDataSet descendant inside package1,
> when user fires event for dataset, i need to cast a DataSet to
TMyDataSet
>
> TMyDataSet *a_MyDataSet = dynamic_cast<TMyDataSet
*>(DataSource->DataSet)
>
> and it this gives a NULL.

If you know for a fact that the DataSet is always a TMyDataSet, then
you should be using static_cast instead of dynamic_cast.  The only
time you should ever use dynamic_cast is when you are not sure what
the actual type is going to be.


Gambit

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Subject: Re: dynamic_cast does not work in packages
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