Function icasecmp

include/singa/utils/string.h:31–37

namespace singa {
inline bool icasecmp(const string& l, const string& r) {
  return l.size() == r.size() &&
         equal(l.cbegin(), l.cend(), r.cbegin(),
               [](string::value_type l1, string::value_type r1) {
                 return toupper(l1) == toupper(r1);
               });
}

inline string ToLowerCase(const string& input) {
  string out;