无法推断出“ T”的模板参数

Question

My code is :

std::vector<double> Vec;

template<typename T>
void GetObj(VARIANT &vtProp) 
{
    CComSafeArray<T> SafeArray;

    SafeArray.Attach(vtProp.parray);
    ULONG Count = SafeArray.GetCount();
    Vec.resize(Count);
    for(ULONG Index = 0; Index < Count; Index++)
    {
        Vec[Index] = SafeArray[Index];
    }
}

while compilation I got the error below:

error C2783: 'void __cdecl GetObj(struct tagVARIANT &)' : could not deduce template argument for 'T'

Kindly suggest me the correct answer

Answer 1

函数模板的签名中没有任何内容允许编译器推断模板类型，因此您需要明确：

GetObj<TheActualType>(arg);