Function to_lower_inplace

src/common/string_utils.cpp:21–23

#include <cctype>

void to_lower_inplace(std::wstring &s) {
  std::transform(s.begin(), s.end(), s.begin(), &towlower);
}

void to_upper_inplace(std::wstring &s) { std::transform(s.begin(), s.end(), s.begin(), &towupper); }