Re: [boost] Re: in/out parameters, codingstylesandmaintenance

From: Justin M. Lewis (boost_at_[hidden])
Date: 2003-05-03 22:48:34

----- Original Message -----
From: "Gregory Colvin" <gregory.colvin_at_[hidden]>
To: "Boost mailing list" <boost_at_[hidden]>
Sent: Saturday, May 03, 2003 8:43 PM
Subject: Re: [boost] Re: in/out parameters, codingstylesandmaintenance

> On Saturday, May 3, 2003, at 21:12 America/Denver, Justin M. Lewis
> wrote:
> > ...
> > A little bit of an overly simple example.  How about something more
> > like
> >
> > void MyGetCWD(c_out<std::string> cwd)
> > {
> >     char *buf = new char[FIRSTSIZE];
> >     unsigned int size = FIRSTSIZE;
> >     while(getcwd(buf, sizeof(buf)) == NULL)
> >     {
> >         delete [] buf;
> >         size += step;
> >         buf = new char[size];
> >     }
> >
> >     cwd = buf;
> >     delete[] buf;
> > }
>
> Why not this?
>
>    std::string GetCWD() {
>      size_t size = FIRSTSIZE;
>      boost::scoped_array<char> buf(new char[size]);
>      while (!getcwd(buf,size))
>        buf.reset(new char[size *= 2]);
>      return std::string(buf);
>    }

Yes, I knew someone would do something like that, that's why I made a 2nd
example, to make that harder to do.  So, :P

>
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