标签： C++

////////////////////////////////////////////////////////////////////////////////
//
//  File Name:      String.hpp
//  Class Name:     hString
//  Description:    用于字符串相关扩展操作
//  Author:         Fawdlstty
//
//  Date:           Nov 19, 2016
//  Log:            Create this file.
//
////////////////////////////////////////////////////////////////////////////////
 
 
 
#ifndef __STRING_HPP__
#define __STRING_HPP__
 
 
 
#include <string>
#include <cstdarg>
 
 
 
template<typename charT>
class hString {
public:
    //清除字符串开始部分空格
    static void trimLeft (std::basic_string<charT> &str) {
        str.erase (0, str.find_first_not_of (' '));
    }
 
    //清除字符串结束部分空格
    static void trimRight (std::basic_string<charT> &str) {
        str.erase (str.find_last_not_of (' ') + 1);
    }
 
    //清楚两端空格
    static void trim (std::basic_string<charT> &str) {
        str.erase (0, str.find_first_not_of (' '));
        str.erase (str.find_last_not_of (' ') + 1);
    }
 
    //删除字符串中指定字符
    static void erase (std::basic_string<charT> &str, const charT &charactor) {
        str.erase (remove_if (str.begin (), str.end (), bind2nd (std::equal_to<charT> (), charactor)), str.end ());
    }
 
    //替换字符串中指定字符串
    static int replace (std::basic_string<charT> &str, const std::basic_string<charT> &strObj, const std::basic_string<charT> &strDest) {
        int ret = 0;
        charT pos = str.find (strObj);
        while (pos != std::basic_string<charT>::npos) {
            ret++;
            str.replace (pos, strObj.size (), strDest);
            pos = str.find (strObj);
        }
        return ret;
    }
 
    //一行中的字符串截断，并可转为其他类型
    template<typename T>
    static int split_aLine_conv (const std::basic_string<charT> &str, std::vector<T> &seq, charT separator) {
        if (str.empty ()) return 0;
        int count = 0;
        std::basic_stringstream<charT> bs (str);
        for (std::basic_string<charT> s; std::getline (bs, s, separator); count++) {
            typename T val;
            std::basic_stringstream<charT> bss (s);
            bss >> val;
            seq.push_back (val);
        }
        return count;
    }
 
    //字符串截断
    static void split (std::basic_string<charT> s, std::vector<std::basic_string<charT> >& v, char ch = ' ') {
        ptrdiff_t start = 0, p, len = s.length ();
        do {
            p = s.find (ch, start);
            if (p == -1) p = len;
            s [p] = '\0';
            if (s [start] != '\0') v.push_back (&s [start]);
            start = p + 1;
        } while (start < len);
    }
 
    //字符串格式化
    static std::basic_string<charT> format (std::basic_string<charT> fmt_str, ...) {
        //来源：http://stackoverflow.com/questions/2342162/stdstring-formatting-like-sprintf
        ptrdiff_t final_n, n = ((ptrdiff_t) fmt_str.size ()) * 2;
        std::basic_string<charT> str;
        std::unique_ptr<charT []> formatted;
        va_list ap;
        while (1) {
            formatted.reset (new charT [n]);
            //strcpy_s (&formatted [0], fmt_str.size (), fmt_str.c_str ());
            va_start (ap, fmt_str);
            final_n = vsnprintf_s (&formatted [0], n, _TRUNCATE, fmt_str.c_str (), ap);
            va_end (ap);
            if (final_n < 0 || final_n >= n)
                n += abs (final_n - n + 1);
            else
                break;
        }
        return std::basic_string<charT> (formatted.get ());
    }
};
 
 
 
typedef hString<char> hStringA;
typedef hString<wchar_t> hStringW;
#ifdef _UNICODE
typedef hStringW hString_t;
typedef std::wstring string_t;
#else
typedef hStringA hString_t;
typedef std::string string_t;
#endif
 
 
 
#endif //__STRING_HPP__

#include <iostream>
using namespace std;
 
template<class ... Args>
int Sum (Args... args) {
    return sizeof...(args);
}
 
int main (int argc, char* argv []) {
    cout < < Sum (1,2,23,124,4,23,43,24,32,4,23) << endl;
    return 0;
}

int Sum(int,int,int,int,int,int,int,int,int,int,int);