🚀 go-pugleaf

In article <AE5J83na99@qsar.chem.msu.su> "Eugene Radchenko"
<eugene@qsar.chem.msu.su> writes:

|> I have just realized that something is grossly overlooked in C++ standard.
|> It requires every program to have the main() function (which implementation
|> is not allowed to supply) with parameters (void) or (int argc, int*argv[]).
|> However, Windows programs have another convention: prrogram must contain
|> the function
|>   int WinMain(HINSTANCE curInst, HINSTANCE prevInst, LPSTR cmdline, int cmdShow)
|> Some of this is of course quirks or even outright ignored in Win32
|> (prevInst), but the full non-parsed command line could be useful sometimes,
|> and not all implementations provide the function retrieving it. And anyway
|> this is definitely not a main() from the specs. Maybe the requirements on
|> the main() should be relaxed somehow?

Implementations are not prevented from having extensions, nor from
requiring non-standard means of getting at those extensions.  A
program without a main (at least in a hosted environment) is
undefined; if the implementation wishes to give it a specific
definition, it is free to do so.

What the standard guarantees is what is portable.  If an
implementation wishes to support the above, it can, but it *must*
support the two variants of main described in the standard; if you
want your code to be even slightly portable, then you must provide one
of these variants.  Of course, portability can be compromised by other
things as well.  For example, if you are running under Windows, it is
probable that you also use a number of special library functions that
won't be available on other machines, either.  So it may not
particularly worry you that the absense of a main means that your
program is using a platform specific extension.
--
James Kanze         Tel.: (+33) 88 14 49 00        email: kanze@gabi-soft.fr
GABI Software, Sarl., 8 rue des Francs-Bourgeois, F-67000 Strasbourg, France
Conseils, études et réalisations en logiciel orienté objet --
                -- A la recherche d'une activité dans une region francophone


[ comp.std.c++ is moderated.  Submission address: std-c++@ncar.ucar.edu.
  Contact address: std-c++-request@ncar.ucar.edu.  The moderation policy
  is summarized in http://dogbert.lbl.gov/~matt/std-c++/policy.html. ]