“std::vector”:“U64”不是参数“_Ty”的有效模板类型参数

I have a header SomeDefines.h that includes

我有一个标题。h,包括

#define U64 unsigned long long
#define U16 unsigned short

In Myclass.h, I #include SomeDefines.h at the top.

在Myclass。我# include SomeDefines h。h在顶部。

In the Myclass declaration, I have a function

在Myclass声明中，我有一个函数。

bool someFunc(const std::vector<U64>& theVector);

and a member variable tbb::atomic someNumber;

以及一个成员变量tbb::atomic someNumber;

When I compile in Visual Studio 2012, I get the errors

当我在Visual Studio 2012中编译时，我得到了错误。

error: 'U64': undeclared identifier
error C2923: 'std::vector': 'U64' is not a valid template type argument for parameter '_Ty'

The errors go away if I replace the U64 with unsigned long long

如果我用unsigned long long替换U64，错误就会消失。

bool someFunc(const std::vector<unsigned long long>& theVector);

I thought the compiler would see the #define U64 unsigned long long and replace U64 with unsigned long long.

我认为编译器会看到#define U64没有签名的long long，并且用unsigned long long替换U64。

Why am I getting these errors for the U64 and not the U16?

为什么我要为U64而不是U16得到这些错误?

1 个解决方案

#1

#define is not a good idea for creating new types. Prefer typedef or using:

#define不是创建新类型的好方法。喜欢的类型或使用:

typedef unsigned long long U64;
// or:
using U64 = unsigned long long;