trim for std::string c++11

trim

// https://stackoverflow.com/questions/216823/whats-the-best-way-to-trim-stdstring

#include <algorithm> 
#include <cctype>
#include <locale>

// trim from start (in place)
static inline void ltrim(std::string &s) {
	s.erase(s.begin(), std::find_if(s.begin(), s.end(), [](int ch) {
		return !std::isspace(ch);
	}));
}

// trim from end (in place)
static inline void rtrim(std::string &s) {
	s.erase(std::find_if(s.rbegin(), s.rend(), [](int ch) {
		return !std::isspace(ch);
	}).base(), s.end());
}

// trim from both ends (in place)
static inline void trim(std::string &s) {
	ltrim(s);
	rtrim(s);
}

// trim from start (copying)
static inline std::string ltrim_copy(std::string s) {
	ltrim(s);
	return s;
}

// trim from end (copying)
static inline std::string rtrim_copy(std::string s) {
	rtrim(s);
	return s;
}

// trim from both ends (copying)
static inline std::string trim_copy(std::string s) {
	trim(s);
	return s;
}