Re: Program Execution and Test Libraries

From: bdawes_at_[hidden]
Date: 2001-01-26 13:01:22

--- In boost_at_y..., "Peter Dimov" <pdimov_at_m...> wrote:
> > --- In boost_at_y..., "Peter Dimov" <pdimov_at_m...> wrote:
> > > After reading the documentation and browsing the code, I'm still
> > somewhat
> > > confused about the purpose of the Program Execution Library. 
Why is
> > this
> > > level necessary?
> >
> > So that uses in production programs have no dependencies on test
> > libraries.
> 
> What are the benefits of using the Program Execution Library
> in production programs?

More uniform reporting of errors, particularly exceptions.

This is particularly useful for programs running unattended under 
control of scripts or batch files.  Some operating systems pop up 
message boxes if an uncaught exception occurs, and this requires 
operator intervention.  By converting such exceptions to non-zero 
program return codes, the library makes the program a better citizen.

OTOH, more uniform reporting of errors isn't a benefit to some 
programs, particularly programs always run by hand by a knowledgable 
person.  So cpp_main() wouldn't be worth using in that environment.

--Beman