写了个小代码测试一下, g++的, 确实是即时创建和销毁的.
#include <iostream>
using namespace std;

bool myfunction (int i,int j) { return (i<j); }

struct myclass
{
  
    myclass()
    {
        printf("myclass::myclass()\n");
    }

    ~myclass()
    {
        printf("myclass::~myclass()\n");
    }

    
    operator int() { return a;}
    int a = 5;
} ;

int main ()
{
    cout << "myvector contains:"<<endl;
    int retv = myclass();
    cout << "mark2"<< " retv = " << retv <<endl;

    return 0;
}


---------------------------------------
$ ./a
myvector contains:
myclass::myclass()
myclass::~myclass()
mark2 retv = 5




【 在 hyperLee (老李) 的大作中提到: 】
: 比如下面的代码
: struct FO
: {
: ...................
--
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