Re: [boost] BOOST_TRY like macros: time to add them?

From: John Maddock (john_at_[hidden])
Date: 2004-02-29 11:28:07

> Right now there are 3 libraries near review, each using their
> own set of similar macros:
>  - circular_buffer
>  - indexed_set
>  - serialization
>
> The reasons to use macros instead of RAII is convenience
> and performance.
>
> Some compilers (BCB) do not allow try/catch with
> exceptions disabled so some solution is needed.
>
> It would be better to have and use standardized macros
> in Boost.
>
>
> Example: macros used in indexed_set:
>
> #if !defined(BOOST_NO_EXCEPTIONS)
> #  define BOOST_INDEXED_SET_TRY try
> #  define BOOST_INDEXED_SET_CATCH(x) catch(x)
> #  define BOOST_INDEXED_SET_RETHROW throw
> #else
> #  define BOOST_INDEXED_SET_TRY
> #  define BOOST_INDEXED_SET_CATCH(x) if(0)
> #  define BOOST_INDEXED_SET_RETHROW
> #endif
>
> Compiles w/o warnings on VC6+, BCB gives unreachable
> code warning (but I'll try to find workaround).

I doubt you'll find a satisfactory one, there are pragmas that can disable
those warnings, but that introduces even more code than the traditional:

#ifndef BOOST_NO_EXCEPTIONS
catch(x)
{
}
#endif

I suggest we review these when the first of these lib's comes up for review,
anyone else want to comment?

John.