to_lower.hpp

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#ifndef MLPACK_CORE_UTIL_LOWER_STRING_HPP
#define MLPACK_CORE_UTIL_LOWER_STRING_HPP
 
namespace mlpack {
namespace util {
 
inline void ToLower(const std::string& input, std::string& output)
{
  std::transform(input.begin(), input.end(), output.begin(),
      [](unsigned char c){ return std::tolower(c); });
}
 
} // namespace util
} // namespace mlpack
 
#endif