c++ - 初始化 const 类成员，错误 : declaration does not declare anything

Question

我正在尝试在构造函数的成员初始化列表中初始化 const 成员变量。

我收到以下错误:

error: declaration does not declare anything [-fpermissive]
    const uint32_t LEDS
          ^

我的代码:

#include <unistd.h>

class BaseAddr {
public:
    BaseAddr():
        LEDS      (0x41200000),
        SW1       (0x41210000), // switch 1
        SW2       (0x41220000), // switch 2
        AXI_BRAM  (0x40000000), // 128 registers
        AXI_DUMMY (0x43c00000)  // 16 registers, 4 lsb are connected with leds
    { /* nop */ }

    virtual ~BaseAddr() {}

    const uint32_t LEDS;
    const uint32_t SW1;
    const uint32_t SW2;

private:
    const uint32_t AXI_BRAM;
    const uint32_t AXI_DUMMY;
};

为什么会出现这个错误？

Answer 1

我要说你有一个宏 LEDS 定义如下:

#define LEDS

现在您的成员声明变为:

const uint32_t;

这会正确触发错误，如图所示 here .