Re: Verify and expression

From:
"Andrei Alexandrescu (See Website For Email)" <SeeWebsiteForEmail@erdani.org>
Newsgroups:
comp.lang.c++.moderated
Date:
18 Oct 2006 15:15:59 -0400
Message-ID:
<45365CC2.90606@erdani.org>
Alf P. Steinbach wrote:

* Dave Harris:

     char *s = VERIFY( strdup( "test" ), "out of memory" );

which would be more useful.


Featurism! ;-)

Well, a broadening of scope, because now it's very unclear what the
requirements are.

Anyway, the above is very possible, but I'd prefer

      char const* s = strdup( "test" );
      !!s || TERMINATE( "out of memory" );


I think it's important to save vertical space, which is always at a
premium.

(You mention also using a global variable to store the condition's value,
but I think that suffers from not being re-entrant or thread-safe. If you
had something else in mind, I missed it.)


Irrelevant! ;-)

Note that

     std::cout << "uh, well" << std::endl;

is not thread safe.

In short, the argument seems to be, "because C++ does not currently
support threading, nothing can be implemented in C++ (it would not be
thread safe)", which smacks of fallacy, at least to my tongue's taste
buds.


I think the problem is cut clearer in this case: global shared state
invites a host of problems, among which threading problems. It's not a
fallacy.

Andrei

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