Re: [Boost-users] scoped_array and legacy APIs

From: Cory Nelson (phrosty_at_[hidden])
Date: 2005-04-20 23:36:45

So long as Type has no ctor/dtor, I don't see a reason why it wouldn't work.

On 4/20/05, Sean DeNigris <lotusone_at_[hidden]> wrote:
>  
>  
> 
> Hey-hey, 
> 
> Is it proper to to use static_cast like this: 
> 
>   
> 
> //Library.h - legacy library 
> 
> typedef ??? Type; //library-defined, we don't know the actual type 
> 
> typedef Type* PType; //library-defined pointer type 
> 
>   
> 
> //sets bufSize to # bytes necessary if buf not big enough 
> 
> LibraryFunction(PType buf, int* bufSize); 
> 
>   
> 
> //MyCode.cpp 
> 
> int bytesNeeded = 0; 
> 
> LibraryFunction(0, &bytesNeeded); 
> 
> scoped_array<Type>(static_cast<PType>(new
> BYTE[bytesNeeded])); 
> 
>   
> 
> The legacy library tells us storage requirements in BYTEs, but I want to
> deal with 'Type's, not BYTEs. 
> 
>   
> 
> Is there a conceivable reason why this could not be safe, even if it happens
> to be with the current implementation? 
> 
> Thanks. 
> 
> - Sean 
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> 

-- 
Cory Nelson
http://www.int64.org