Re: Problem where a function is invoked once but called twice (when invocation is within an allocator).

["J-P. Rosen" <rosen@adalog.fr>]

Le 05/05/2011 05:52, Rod Kay a �crit :
>     Any clues on why the use of an allocator would cause a single
> function invocation to be called twice ?
>
>
>     the_Movie : media.Video.view := new_Movie;
>
>     the_next_Frame :              openGL.Image :=
> the_Movie.next_Frame;                                        -- case 1
>     the_next_Frame : access openGL.Image := new
> opengl.Image' (the_Movie.next_Frame);   -- case 2
>
>     In the 1st case, the 'next_Frame' function is called once.
>     In the 2nd case, it is called twice.
>

Wouldn't Image be controlled by any chance? In that case, the assignment 
may involve the creation of an intermediate object
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