if (aVersion == SketchPlugin_ConstraintAngle::THE_VERSION_1) {
std::string aTypeLC = theType;
- std::transform(aTypeLC.begin(), aTypeLC.end(), aTypeLC.begin(), ::tolower);
+ std::transform(aTypeLC.begin(), aTypeLC.end(), aTypeLC.begin(),
+ [](char c) { return static_cast<char>(::tolower(c)); });
if (aTypeLC == "supplementary")
aType = (int)SketcherPrs_Tools::ANGLE_COMPLEMENTARY;
else if (aTypeLC == "backward")