std::ofstream filename

[red floyd]

Is there any way to retrieve the filename given to a std:fstream
(passed in constructor or in ofstream:pen())?

Or, should I derive from ofstream (should probably be a template to
handle ifstream and fstream as well, but I'm typing on the fly)

yes, I know the syntax may be off...


class onamedfstream : public ofstream {
private:
std::string filename_;
public:
ofnamedstream() : ofstream() { }
ofnamedstream(const char * fname, ios_base:penmode mode =
ios_base:ut) :
filename_(fname), ofstream(fname, mode) { }
~ofnamedstream() { }
void open(const char *fname, ios_base:penmode = ios_base:ut)
{
filename_ = fname;
ofstream:pen(fname, mode);
}
const std::string& get_filename(void) const { return filename_; }
};

 

[Thomas Matthews]

Is there any way to retrieve the filename given to a std:fstream
(passed in constructor or in ofstream:pen())?

Or, should I derive from ofstream (should probably be a template to
handle ifstream and fstream as well, but I'm typing on the fly)

yes, I know the syntax may be off...


class onamedfstream : public ofstream {
private:
std::string filename_;
public:
ofnamedstream() : ofstream() { }
ofnamedstream(const char * fname, ios_base:penmode mode =
ios_base:ut) :
filename_(fname), ofstream(fname, mode) { }
~ofnamedstream() { }
void open(const char *fname, ios_base:penmode = ios_base:ut)
{
filename_ = fname;
ofstream:pen(fname, mode);
}
const std::string& get_filename(void) const { return filename_; }
};

There are no _standard_ methods in the iostream library for
retrieving the filename after the stream has been opened.

Most programmers remember the filename by using some sort of
variable or string literal.

--
Thomas Matthews

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