Comments (1)
declare_xxxx/dcl_xxxx 首先是一个结构性的东西,它对应C语言里面的前置声明。很多情况下,缺少了前置声明,几个结构体中存在相互引用的指针就做不到了。举一个最简单的例子:
typedef struct {
...
example_t *ptNext;
} example_t;
这是一个很普通的节点,里面有一个指向自己类型的指针,上述代码是编译不过的,因为定义指针的时候,example_t 还不存在——为了解决这个问题就需要前置声明:
typedef struct example_t example_t
struct example_t {
...
example_t *ptNext;
};
declare_xxxx/def_xxxxx 就是对应前置引用。属于必不可少的。
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Related Issues (12)
- class_internal / protected_internal 后面跟参数的意义? HOT 1
- IMPLEMENT 和 INHERIT 的区别是? HOT 1
- end_def_class 必须写 ? HOT 1
- union类型在这里起到了什么样的作用? HOT 1
- 缺少使用的example HOT 1
- compile cpp source code(__OOC_CPP__ is defined) failed on arm-none-eabi-g++ 2021.10 HOT 1
- compile cpp source code(__OOC_CPP__ is defined) failed on arm-none-eabi-g++ 2021.10 HOT 1
- Open Github Discussions HOT 1
- How to compile the examples? HOT 6
- Comparison with other solutions? HOT 1
- What is the difference between the class templates? HOT 1
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