[問題] template 用法
最近在 trace android 的 code ，裡面有些 c++ 的程式，寫了一小段來驗證
#include<iostream>
#include<stdlib.h>
using namespace std;
template<typename T>
class Demo{
public:
Demo(T* other);
Demo(const Demo<T>& other);
};
template<typename T>
Demo<T>::Demo(T* other){
cout<<"This is the First constructor"<<endl;
}
template<typename T>
Demo<T>::Demo(const Demo<T>& other){
cout<<"This is the second constructor"<<endl;
}
int main(){
int *ptr;
Demo<int> p; // 會 error，因為它會找不到 Demo() 建構子，這個合理~
Demo<int> p = ptr; //這邊他會 call Demo(T* other) 這邊的建構子
//不太懂為啥他會call 第一個建構子呢?
//如果用 Demo<int> p(ptr); 還比較容易理解..
}
謝謝
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