To clear all the opening characters of std:string

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

//Remove opening characters in front of you
static inline std::string &ltrim(std::string &s) {
        s.erase(s.begin(), std::find_if(s.begin(), s.end(), std::not1(std::ptr_fun<int, int>(std::isspace))));
        return s;
}

//Remove open characters after
static inline std::string &rtrim(std::string &s) {
        s.erase(std::find_if(s.rbegin(), s.rend(), std::not1(std::ptr_fun<int, int>(std::isspace))).base(), s.end());
        return s;
}

//Remove open characters at both ends
static inline std::string &trim(std::string &s) {
        return ltrim(rtrim(s));
}