{

kNone = 0,

kError = 1,

kWarn = 2,

kInfo = 3,

kTrace = 4

{

std::ostream &stream;

int level;

{

std::ostringstream oss;

oss << value;

return oss.str();

{

static const char *orange = "\033[0;33m";

static const char *red = "\033[0;31m";

static const char *white = "\033[0;37m";

static const char *gray = "\033[0;90m";

static const char *reset = "\033[0m";

static const char *logColors[] = {red, red, orange, gray};

if (level <= logger.level)

{

va_list args;

va_list args2;

va_start(args, message);

va_copy(args2, args);

int size = vsnprintf(nullptr, 0, message, args) + 1;

std::unique_ptr<char[]> buffer(new char[size]);

#ifdef _WIN32

_vsnprintf_s(buffer.get(), size, _TRUNCATE, message, args2);

#else

vsnprintf(buffer.get(), size, message, args2);

#endif

// Brackets and messages are white.

// Log levels are red for error and warning, orange for info, and grey for trace.

// Then the color is reset.

logger.stream << white << "[" << logColors[level] << kLevelStr[level] << white << "] ";

logger.stream << buffer.get();

logger.stream << reset << std::endl;

va_end(args);

va_end(args2);

}

{

(void)logger;

(void)level;

(void)message;

(void)(std::initializer_list<int>{(static_cast<void>(args), 0)...});