将原始运营商new,placement new和standard delete合并是否合法？

Question

伙计们!出于好奇 - 以下代码可能不合法,是吗？

T *p = ::operator new(sizeof(T)); // allocate memory for a T
new (p) T; // construct a T into the allocated memory
delete p; //delete the object using the standard delete operator

Answer 1

不,你只能delete从中得到回报new- 没有例外.