Posted on 2011-05-03 20:52
點點滴滴 閱讀(779)
評論(0) 編輯 收藏 引用 所屬分類:
02 編程語言
問題
class A;
class B {
public:
B(A& a) : a(a) {}
private:
A& a;
};
/* Method 1 */
/* warning C4355: 'this' : used in base member initializer list */
/*
class A {
public:
A() : b(*this) {}
private:
B b;
};
*/
/* Method 2 */
/* But I need to manually perform memory dellocation. */
class A {
public:
A() { b = new B(*this); }
~A() { delete b; }
private:
B* b;
};
int main() {
}
//解決辦法
struct bar;
struct foo
{
foo(bar& pX) :
mX(pX)
{}
bar& mX;
};
struct bar
{
bar(void) :
mX(self())
{}
foo mX;
private:
bar& self(void)
{
// fools the warning
return *this;
}
};