#include <unordered_map>
#include <memory>
#include <vector>
template<> // Voxel has voxel.position which is a IVec2 containing 2 values, it also has a bool value
struct hash<Voxel> {
size_t operator()(const Voxel & k) const
{
return Math::hashFunc(k.position);
}
};
template<typename T> // This was already given
inline size_t hashFunc(const Vector<T, 2>& _key)
{
std::hash<T> hashfunc;
size_t h = 0xbd73a0fb;
h += hashfunc(_key[0]) * 0xf445f0a9;
h += hashfunc(_key[1]) * 0x5c23b2e1;
return h;
}
我的主要
int main()
{
Voxel t{ 16,0,true };
std::hash(t);
}
我现在正在撰写有关std::hash的专题。现在,在线提交页面总是返回我的代码以下错误。我不知道为什么以及我做错了什么。
error: 'hash' is not a class template struct hash<>
并且
error: no match for call to '(const std::hash<Math::Vector<int, 2ul> >) (const Math::Vector<int, 2ul>&)' noexcept(declval<const_Hash((declval<const_Key&>()))>.
我自己的编译器只会抛出
error: The argument list for "class template" std :: hash "" is missing.