Re: String declaration and initialization

["Jeffrey R. Carter" <spam.jrcarter.not@spam.acm.org>]

S�bastien wrote:
> 
> So I don't actually know how fast is the conversion between String and 
> Unbounded_String but I think it's a waste of ressource.

You've already wasted quite a bit of your most expensive resource, a developer's 
time, worrying about this. Far more efficient is to do it the obvious way, with 
Unbounded_String, and only worry about the time of the conversions if you are 
unable to meet your timing requirements.

> But you give me an Idea :
> declare
>     buffer: access String;
>     Free_String is new Unchecked_Deallocation(String, access all String);
> begin
>     case SomeTest is
>         case TEST1 =>
>             buffer := new String("Test1");
>         case TEST2 =>
>             buffer := new String("Test2");
>     end case;
>     MyTreatment1(buffer.all, buffer.all'Size);
>     MyTreatment2(buffer.all, buffer.all'Size);
>     MyTreatment3(buffer.all, buffer.all'Size);
> end;
> 
> but it doesn't work of course since I can't create with new an 
> unconstrained object.

You can if you get the syntax right, as has been pointed out elsewhere. But this 
is probably your worst choice. Here you have written a memory leak. You should 
avoid explicit access values whenever possible, since such errors are so easy to 
make.

-- 
Jeff Carter
"You a big nose have it."
Never Give a Sucker an Even Break
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