where did explicit come from?

  • Thread starter Thread starter Stephen Alpert
  • Start date Start date
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Stephen Alpert

I've moved an ATL project (that uses STL) from VC6 to VC7. Of course, it won't
compile. In particular, the line

char *res = (char *)malloc( n );
ostrstream pout = ostrstream( res, n ); <<-- error here

now generates an error:

error C2558: class 'std::ostrstream' : no copy constructor available or copy
constructor is declared 'explicit'

The relevant definition from <strstream> is:
....
_CRTIMP2 ostrstream(char *, streamsize,
ios_base::openmode =
ios_base::out); // construct with static array


How do I fix this? Do I have to extend ostrstream and add my own constructor?
Am I misreading the error message?

/steveA
Steve Alpert
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Stephen Alpert said:
I've moved an ATL project (that uses STL) from VC6 to VC7. Of course, it won't
compile. In particular, the line

char *res = (char *)malloc( n );
ostrstream pout = ostrstream( res, n ); <<-- error here
Click to expand...

Do you really want to do this??
It creates a temporary unnamed 'ostrstream'
object and uses that to initialize 'pout'.
now generates an error:

error C2558: class 'std::ostrstream' : no copy constructor available or copy
constructor is declared 'explicit'
Click to expand...

While the compiler is allowed to eliminate
the temporary, the copy constructor is
required nevertheless.
The relevant definition from <strstream> is:
...
_CRTIMP2 ostrstream(char *, streamsize,
ios_base::openmode =
ios_base::out); // construct with static array


How do I fix this? Do I have to extend ostrstream and add my own constructor?
Click to expand...

Try this:
ostrstream pout( res, n );
Am I misreading the error message?
Click to expand...

An 'explicit' is one way that would lead to
this error message. Here, it probably is the
missing copy ctor.
/steveA
Steve Alpert
[...]
Click to expand...


Schobi

--
(e-mail address removed) is never read
I'm Schobi at suespammers org

"And why should I know better by now/When I'm old enough not to?"
Beth Orton
 
Do you really want to do this??
It creates a temporary unnamed 'ostrstream'
object and uses that to initialize 'pout'.
Click to expand...

....[stuff deleted]...

I found that
ostrstream pout( res, n );
worked just fine. I guess VC6 wasn't so picky!

thanks!
/steveA

Steve Alpert
my email (e-mail address removed) is encrypted with ROT13 (www.rot13.org)
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