[英]MSVC Overload error for templates but not g++
I've asked on other forums but no one has answered :SI keep getting: 我曾在其他论坛上提问,但没有人回答:SI不断得到:
None of the 6 overloads could convert all arguments. 6个重载都不能转换所有参数。
I only get this problem in visual studio though. 我只在Visual Studio中遇到此问题。 When I compile with g++ or codeblocks, it works perfectly fine. 当我使用g ++或代码块进行编译时,它可以很好地工作。
The code I'm calling my templates with is: 我用来调用模板的代码是:
MemDeSerialize(ListOfItems, SerializedData, size_t(Data[2]));
The definitions: 定义:
typedef struct
{
//......
} PanelItem;
std::vector<PanelItem> ListOfItems;
template<typename T>
void MemDeSerialize(T& Destination, unsigned char* &Source){...}
template<typename T>
void MemDeSerialize(T*& Destination, unsigned char* &Source, size_t Size){...}
template<typename T>
void MemDeSerialize(std::vector<T> &Destination, unsigned char* &Source, size_t Size)
{
Destination.resize(Size);
for (size_t I = 0; I < Size; ++I)
MemDeSerialize(&Destination[I], Source, Size);
}
/** FUNCTION OVERLOADS **/
void MemDeSerialize(Model* Destination, unsigned char* &Source);
void MemDeSerialize(PanelItem* Destination, unsigned char* &Source);
void MemDeSerialize(Compass* Destination, unsigned char* &Source);
void MemDeSerialize(FontChar* Destination, unsigned char* &Source);
The error I keep getting is: 我不断得到的错误是:
1>error C2665: 'MemDeSerialize' : none of the 6 overloads could convert all the argument types
1>could be 'void MemDeSerialize<PanelItem>(T *&,unsigned char *&,size_t)'
1> with
1> [
1> T=PanelItem
1> ]
1> while trying to match the argument list '(PanelItem *, unsigned char *, size_t)'
1> see reference to function template instantiation 'void MemDeSerialize<PanelItem>(std::vector<_Ty> &,unsigned char *&,size_t)' being compiled
1> with
1> [
1> _Ty=PanelItem
1> ]
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========
Any ideas why? 有什么想法吗? It compiles fine in codeblocks; 它可以在代码块中很好地编译; just not visual studio. 只是没有视觉工作室。
I've been calling it like so: MemDeSerialize(ListOfItems, SerializedData, size_t(Data[2]));
我一直这样称呼它: MemDeSerialize(ListOfItems, SerializedData, size_t(Data[2]));
Well I can't say why it happens but MSVC seems to want you to define a pointer variable to pass as the reference: 好吧,我不能说为什么会发生,但是MSVC似乎希望您定义一个指针变量作为引用传递:
template<typename T>
void MemDeSerialize(std::vector<T> &Destination, unsigned char* &Source, size_t Size)
{
Destination.resize(Size);
for (size_t I = 0; I < Size; ++I)
{
T* foo = &Destination[I];
MemDeSerialize(foo, Source, Size);
}
}
My guess is that passing &Destination[I]
directly is only giving you the pointer value (address of the element), it doesn't actually give you a pointer variable that you can reference. 我的猜测是直接传递&Destination[I]
仅给您指针值(元素的地址),而实际上却没有给您可以引用的指针变量。 GCC is perhaps more flexible in allowing you to do that with temporaries. 在允许您临时使用GCC时,GCC可能更灵活。
I don't know what the correct behaviour would be from a standards viewpoint. 从标准的角度来看,我不知道正确的行为是什么。
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