Function StrAppend

include/Surelog/Utils/StringUtils.h:53–58

// string.
template <typename... Ts>
void StrAppend(std::string* dest, Ts&&... args) {
  std::ostringstream out;
  out << *dest;
  (out << ... << std::forward<Ts>(args));
  *dest = out.str();
}

namespace StringUtils {
// Tokenize "str" at "any_of_separator", store in "result" array.