C / C++ / MFC

Quote:

QDebug &QDebug::operator<<(QChar t)
Writes the character, t, to the stream and returns a reference to the stream. Normally, QDebug prints control characters and non-US-ASCII characters as their C escape sequences or their Unicode value (\u1234). To print non-printable characters without transformation, enable the noquote() functionality, but note that some QDebug backends may not be 8-bit clean and may not be able to represent it.

Quote:

QDebug &QDebug::noquote()
Disables automatic insertion of quotation characters around QChar, QString and QByteArray contents and returns a reference to the stream.

When quoting is disabled, these types are printed without quotation characters and without escaping of non-printable characters.

Member 14968771 wrote:

..RTFM.. everybody knows that..." disease.

Francis Lagar wrote:

How can you insert th

Member 14968771 wrote:

RTFM is not an answer I am looking for...

Member 14968771 wrote:

If it returns "error" - how can I actually read it / get it in human / verbose format ?

k5054@localhost]$ cpp -include stdlib.h -dM /dev/null | grep -E 'define (THROW|LEAF)>'
#define __LEAF , __leaf
#define THROW __attribute ((nothrow __LEAF))
[k5054@localhost]$ 

#include <cerrno>
#include <cstring>

int ret = socket(foo, bar, baz); // socket() returns -1 on error and sets global var errno

if(ret == -1 ) {
   switch (errno) {
      case EACCES:
          // handle EACCES issue
          break;
      // etc.
      default:
          // print out the text associated with the error using strerror()
          std::cerr << "socket() returned error " << strerror(errno) << '\n';
     }
}

errno = 0;
ret = somefn(blah, blah, blah);
if (errno) {
    // do stuff
}