[問題] struct 當中的 reference type
想請教一些問題：
1. 下面程式碼當中的strcut CMP，是POD type嗎？
2. 建立(CMP){s}的時候，會複製一份字串嗎？還是只傳遞reference呢？
3. (CMP){s}是在compile-time建立？還是在run-time建立呢？
謝謝
// suffix array
#include <string>
#include <vector>
#include <algorithm>
struct CMP {
std::string& s;
bool operator()(const int& i, const int& j) {
return s.substr(i) < s.substr(j);
}
};
int main() {
std::string s = "hello world!";
std::vector<int> array(s.size());
for (int i=0; i<(int)s.size(); ++i) array[i] = i;
std::sort(array.begin(), array.end(), (CMP){s});
return 0;
}
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