c++ - 在类中初始化静态 union

Question

我使用像这样在类中声明静态 union 的开源代码。

VAD.h:

class VD
{   
public:
    static union Wu
    {
        const short w[2 * 64];
        const double y[16];      
    } wu; 
};

VAD.cpp:

VD:: Wu  VD:: wu =
{
     0x0000,  0x7FFF,  0x0000,  0x7FFF,  0x0000,  0x7FFF,  0x0C8B,  0x7F61,
     0x18F8,  0x7D89,  0x2527,  0x7A7C,  0x18F8,  0x7D89,  0x30FB,  0x7641,
     0x471C,  0x6A6D,  0x2527,  0x7A7C,  0x471C,  0x6A6D,  0x62F1,  0x5133,
     0x30FB,  0x7641,  0x5A82,  0x5A82,  0x7641,  0x30FB,  0x3C56,  0x70E2,
     0x6A6D,  0x471C,  0x7F61,  0x0C8B,  0x471C,  0x6A6D,  0x7641,  0x30FB,
     0x7D89, -0x18F8,  0x5133,  0x62F1,  0x7D89,  0x18F8,  0x70E2, -0x3C56,
     0x5A82,  0x5A82,  0x7FFF,  0x0000,  0x5A82, -0x5A82,  0x62F1,  0x5133,
     0x7D89, -0x18F8,  0x3C56, -0x70E2,  0x6A6D,  0x471C,  0x7641, -0x30FB,
     0x18F8, -0x7D89,  0x70E2,  0x3C56,  0x6A6D, -0x471C, -0x0C8B, -0x7F61,
     0x7641,  0x30FB,  0x5A82, -0x5A82, -0x30FB, -0x7641,  0x7A7C,  0x2527,
     0x471C, -0x6A6D, -0x5133, -0x62F1,  0x7D89,  0x18F8,  0x30FB, -0x7641,
    -0x6A6D, -0x471C,  0x7F61,  0x0C8B,  0x18F8, -0x7D89, -0x7A7C, -0x2527,
     0x0000,  0x7FFF,  0x0000,  0x7FFF,  0x0000,  0x7FFF,  0x30FB,  0x7641,
     0x5A82,  0x5A82,  0x7641,  0x30FB,  0x5A82,  0x5A82,  0x7FFF,  0x0000,
     0x5A82, -0x5A82,  0x7641,  0x30FB,  0x5A82, -0x5A82, -0x30FB, -0x7641
};

当我在 Windows 上使用 VC++ 6.0 编译这段代码时，发生了这个错误:

public: static union VD::Wu VD::wu' : non-aggregates cannot be initialized with initializer list

谁能帮帮我？

Answer 1

你需要一对额外的花括号，因为你想初始化嵌套在 union 中的数组:

VD:: Wu  VD:: wu =
{
  { // <-- forgot
    <snip />
  } // <-- these
};