Method toUpper

visage_utils/string_utils.cpp:99–104

  }

  String String::toUpper() const {
    std::u32string result = string_;
    auto to_upper = [](char32_t c) { return (c >= U'a' && c <= U'z') ? c - 32 : c; };
    std::transform(result.begin(), result.end(), result.begin(), to_upper);
    return result;
  }

  String String::removeCharacters(const String& characters) const {
    std::u32string result = string_;