Function PrintCharAndCodeTo

source/test/gtest/gtest-printers.cc:251–272

// also properly escaped using the standard C++ escape sequence.
template <typename Char>
void PrintCharAndCodeTo(Char c, ostream* os) {
  // First, print c as a literal in the most readable form we can find.
  *os << GetCharWidthPrefix(c) << "'";
  const CharFormat format = PrintAsCharLiteralTo(c, os);
  *os << "'";

  // To aid user debugging, we also print c's code in decimal, unless
  // it's 0 (in which case c was printed as '\\0', making the code
  // obvious).
  if (c == 0) return;
  *os << " (" << static_cast<int>(c);

  // For more convenience, we print c's code again in hexadecimal,
  // unless c was already printed in the form '\x##' or the code is in
  // [1, 9].
  if (format == kHexEscape || (1 <= c && c <= 9)) {
    // Do nothing.
  } else {
    *os << ", 0x" << String::FormatHexInt(static_cast<int>(c));
  }
  *os << ")";
}

void PrintTo(unsigned char c, ::std::ostream* os) { PrintCharAndCodeTo(c, os); }
void PrintTo(signed char c, ::std::ostream* os) { PrintCharAndCodeTo(c, os); }