having troubles with a stream...

[JustSomeGuy]

This constructor is causing the application to crash on Mac OS X, in
xcode...

dbgFile::dbgFile(void) : std::ostream(0), output_buffer(),indent_buffer(&output_buffer), isopen(false) {}

here is part of the class definition:

class dbgFile : public std::ostream {
private:
    std::filebuf output_buffer;
    dbgBuf indent_buffer;
    std::stack<std::string> s;
    int stack_level;
    bool isopen;

}

I suspect that std:stream(0) is the culprit, but not sure how to
tell...

[ZuK]

std:: ostream doesn't have a constructor that takes an int. What it does have is a constructor that takes a char *. 0 can be converted to a char * but dereferencing a null pointer usually crashes an application.
use

dbgFile::dbgFile(void) : std::ostream(), output_buffer(),indent_buffer(&output_buffer), isopen(false) {}

Kurt

[JustSomeGuy]

dbg is an instance of dbgFile

however the first call to
dbg << "A Message" << std::endl;

causes a segmentation fault.

The debugger shows:

0 std:string::_M_write
1 std:perator<< <std::char_traits<char> >
2 main

[ZuK]

I don't understand your previous post.
BTW you shouldn't inherit from any of the stream classes. ( they don't have a vitual destructor ).
Use composition instead.
Kurt

[JustSomeGuy]

Could you elaborate please? What is composition?

do you mean:

class dbgFile : public std::ostream {
private:
    std::filebuf output_buffer;

needs to change to:

class dbgFile {
private:
   std::ostream os;
   std::filebuf output_buffer;

[JustSomeGuy]

I just don't get it... This code works in some environments but not in others...
I've attached the source... If anyone has time to look, that would be great.
I'm on MAC OS X, 10.5.7 using XCode 3.1.2

[JohnW@Wessex]

std::ostream(0)

This is a null stream that accepts data but sends it nowhere. Sort of like a 'black hole' stream.

[JustSomeGuy]

The bit bucket.