如何从boost :: ptr_vector中删除元素

那么你可以用std :: vector做到这一点.

在这两种情况下,erase都将迭代器作为参数.
因此,在您从矢量(或ptr_vector)中删除某些内容之前,您需要找到它.

另请注意,ptr_vector将其内容视为已存储对象而非存储指针.所以任何搜索都是通过对象完成的.

所以基本上

 std::vector       x;
 std::ptr_vector   y;

 // These two object should behave in exactly the same way.
 // The ONLY difference is inserting values which for y are pointers.
 // Y take ownership of the pointer and all subsequent acesses to the
 // members of y look like they are objects

#include 
#include 

class A
{ int m;
    public:
    A(int x):m(x)   {}
    bool operator==(A const& rhs)   {return m = rhs.m;}
};

int main()
{
    boost::ptr_vector    x;
    x.push_back(new A(1));
    x.erase(std::find(x.begin(),x.end(),A(1)));


    std::vector          y;
    y.push_back(A(2));
    y.erase(std::find(y.begin(),y.end(),A(2)));

    // To find an exact pointer don't modify the equality.
    // Use find_if and pass a predicate that tests for a pointer
    A* a = new A(3);
    boost:ptr_Vector     z;
    z.push_back(a);
    z.erase(std::find_if(y.begin(),y.end(),CheckPointerValue(a));
}

struct CheckPointerValue
{
     CheckPointerValue(A* a):anA(a) {}
     bool operator()(A const& x)    { return &X == anA;}
     private:
        A* anA;
};