Re: Should you perform complex tasks in the constructor?
On 13-01-10 01:54 PM, Chicken McNuggets wrote:
I've seen various arguments against this primarily centring on the fact
that the only way to return errors in a constructor is to throw an
exception. Of course exceptions seem to be a somewhat controversial
subject in the C++ community so I'll try and avoid touching on that.
But I have a couple of classes that are created when the program
launches and are freed just before the program terminates. It makes
sense for me to put a lot of logic in the constructor as these classes
are initialised from data in different configuration files which are
passed as command line arguments.
Is there any reason I shouldn't put all the file loading / reading /
storing of data in the constructor? Or would you not consider this a
problem? For reference I'm using libxml2 for reading the data in the
configuration files.
In cases where it makes sense I set error variables to be tested, just
like a returned value, after the constructor completes.
e.g.
File *f = new File (path);
if (!f->success ()) {
std::cerr << f->error () << std::endl;
// cleanup
}
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