Re: C++ mapping of OUT variable-length structures

[Diego Sevilla Ruiz <dsevilla ditec um es>]

Hi!

Por 24/Apr/2002, 20:44:27, decía ERDI Gergo:

| On Wed, 24 Apr 2002, Diego Sevilla Ruiz wrote:
| 
| > I hope I can explain it well... Please, take a look at H&V book, pages
| > 300-302. The question is that as the _out types are allocated by the
| > callee, (and are passed by reference), there must be a way to deallocate
| > the previous owned reference if you use a _var type.
| 
| So this is useful when you pass in (on the caller side) a non-empty
| structure, right?

Hmmm... I can't understand what you mean by a non-empty structure...
This has nothing to do with either if the structure is empty or
non-empty... (and I don't see the need for an empty structure either...)

| 
| > In the C++ mapping (contrary to the C mapping) out types are always
| > allocated by the callee and freed by the caller.
| 
| Does this also hold for arrays of variable-length items?
| 

yes. It is the same (array_slice*&, which is allocated within the object
implementation). C++ mapping is pretty homogeneous.

	Best regards.
	diego.

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