log-api-test.cpp

std::string repeat_n(int n, std::string const& s)
{
  log_named_trace(              // Print the log message
    get_logger(),               // inside the logger (like std::cout), with:
    log_prefix("repeat_n"),     // - the function name as prefix
    hana::make_tuple("n", "s"), // - the arguments' names
    n, s);                      // - the arguments' values
  return ...; // Implementation
}