从向量中取消引用ref类。 [英] Dereferencing a ref class from a vector.

问题描述

我有一些非常简单的代码：

I have some pretty simple code:

int me = m_gridPos.y * m_gridWidth + m_gridPos.x;
int mixPos = mixWith->m_gridPos.y * m_gridWidth + mixWith->m_gridPos.x;

（* m_grid）[mixPos] = this;
（* m_grid）[me] = mixWith;

(*m_grid)[mixPos] = this; (*m_grid)[me] = mixWith;

现在，网格只是指向包含块的向量的指针。 块类是一个ref类。

Now the grid is just a pointer to a vector with blocks in them.  The block class is a ref class.

std::vector<Block^>* m_grid;

但是，当我像上面那样取消引用网格时，会导致一些奇怪的异常变得非常复杂，并且有帮助吗？

But, when I dereference the grid like I do above, it causes some strange exceptions quite complicated, and help?

推荐答案

我的异常发生在这里：

My exception occurs here:

__declspec(non_user_code) __declspec(no_refcount) __declspec(no_release_return)
	inline void* __abi_winrt_ptr_assign(void** __ppTargetArg, const volatile ::Platform::Object^ __objArg)
{
	__abi_IUnknown* __pUnknown = reinterpret_cast<__abi_IUnknown*>(const_cast< ::Platform::Object^>(__objArg));
	__abi_IUnknown** __ppTargetUnknown = reinterpret_cast<__abi_IUnknown**>(__ppTargetArg);
	if (__pUnknown != *__ppTargetUnknown)
	{
		if (__pUnknown) {
			__pUnknown->__abi_AddRef();
		}
		if (*__ppTargetUnknown) {
			(*__ppTargetUnknown)->__abi_Release();
		}
		*__ppTargetUnknown = __pUnknown;
	}
	return __pUnknown;
}

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