[英]shared_ptr deleter issue
I am trying to attach deleter function in shared_ptr
as we want to pool my memory but getting an strange error. 我试图在
shared_ptr
附加删除器功能,因为我们要缓冲我的内存,但收到一个奇怪的错误。 Please help me to resolve this error: 请帮助我解决此错误:
template<std::size_t size> class Allocator{
public:
template<typename T> void Release(T *ptr)
{
}
template<typename T> void GetMemory(std::shared_ptr<T> &item)
{
T *ptr = new T();
//my pain point is
item = std::shared_ptr<T>(ptr,
std::bind(&Allocator<size>::Release, this, std::placeholders::_1));
}
};
The error is: 错误是:
prog.cpp: In instantiation of 'void GetMemory(std::share_ptr<T> &item) unsigned int size = 10u]':
prog.cpp:316:15: required from here
prog.cpp:226:19: error: no matching function for call to 'bind(<unresolved overloaded function type>, Pool<10u>*, const std::_Placeholder<1>&)'
std::bind(&Pool<test>::Release, this, std::placeholders::_1));
template<std::size_t size> class Allocator{
public:
template<typename T> void Release(T *ptr)
{
}
template<typename T> void GetMemory(std::share_ptr<T> &item)
{
T *ptr = new T();
//my pain point is
item = std::shared_ptr<T>(ptr,
std::bind(&Allocator<size>::Release, this, std::placeholders::_1));
}
};
You can use a lambda instead: 您可以改用lambda:
item = std::shared_ptr<T>(ptr, [&](auto x) { this->Release(x); });
But if you must use std::bind
, you have to do this: 但是,如果必须使用
std::bind
,则必须这样做:
item = std::shared_ptr<T>(ptr,
std::bind(&Allocator<size>::template Release<T>, this, std::placeholders::_1));
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