[c++0x] 가변 인수 템플릿, string화 예제

#include <sstream>

using std::stringstream;
using std::string;

inline void __impl__inlineArgs(stringstream & ss, const string& str, int && from)
{
    if(from != 0)
        ss << str.substr(from);
    else
        ss << str;
}
template<typename T, typename... Args>
inline void __impl__inlineArgs(stringstream & ss, const string& str, const int && from, T t, Args... args)
{
    const auto target = str.find_first_of('$', from);
    if(target == string::npos)
    {
        ss << str.substr(from);
    }
    else
    {
        ss << str.substr(from, target - from) << t;
        __impl__inlineArgs(ss, str, target + 1, args...);
    }
}
template<typename... Args>
inline string inlineArgs(const string str, Args... args)
{
    stringstream ss;
    __impl__inlineArgs(ss, str, 0, args...);
    return ss.str();
}
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사용방법

inlineArgs("value of userID($) userName($) is $", userId, userName, value[userId]);
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