Re: undefined symbol

["Rick Malik" <rmfci@pacbell.net>]

Daniel...<<ios::nocreate>>
It's version 1 specific !!!  (and earlier)
BCB1 -> iostream.h reads as follows: 

    // stream operation mode
    enum open_mode  {
        in   = 0x01,        // open for reading
        out  = 0x02,        // open for writing
        ate  = 0x04,        // seek to eof upon original open
        app  = 0x08,        // append mode: all additions at eof
        trunc    = 0x10,    // truncate file if already exists
        nocreate = 0x20,    // open fails if file doesn't exist
        noreplace= 0x40,    // open fails if file already exists
        binary   = 0x80     // binary (not text) file
        };

BCB3 -> iosbase.h reads as:

enum open_mode {
                 app         = 0x01,   
                 binary      = 0x02,  
                 in          = 0x04, 
                 out         = 0x08,   
                 trunc       = 0x10,                  
                 ate         = 0x20 
               };


Just thought I'd bring it up. Steve Oualline uses it in "Practical C++
Programming", Herbert Schildt uses it in "Teach Yourselt C++, 2nd Edition",
also in Jamsa's "C/C++ Programmers Bible".

And then there's ol' Kent Reisdorph, in "Teach Yourself CBuilder in 14
days", page 127 for version 1.

I noticed he left it off of the version 3 copy. 
So it looks like ios::nocreate is version 1 only...<<<--- NOTE: I for one,
am gonna miss them...it's what you're used-to.

Rick Malik
rmfci@pacbell.net
"Visit the C++ Builder Hobby Pages"
http://home.pacbell.net/rmfci/bcbhp.htm

----------
> From: Daniel Hallmark <dgh@scott.net>
> To: cpb-thread@zdtips.com
> Subject: Re: undefined symbol
> Date: Thursday, July 16, 1998 1:21 PM
> 
> According to the Rogue Wave iostream docs, "nocreate" is not a valid  
> openmode.  Stroustrup 3rd edition doesn't list a "nocreate" mode either 
> and indicates that both the values and meanings of the openmodes are 
> implementation-defined.
> 
> Daniel Hallmark
> 
> 
> On Wed, 1 Jul 1998, Po Tsang Huang wrote:
> 
> > The following code compiled fine in BC++5, but
> > BCB3 said "ios:nocreate" is undefined. Anybody
> > knows why? 
> > 
> > ifstream s( fn, ios::in | ios::nocreate );