c51 sturct 成员函数指针都不支持?

最新推荐文章于 2023-12-07 17:50:55 发布

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最新推荐文章于 2023-12-07 17:50:55 发布

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本文链接：https://blog.youkuaiyun.com/xwpcom/article/details/85210456

本文探讨了使用C51编程时遇到的一个重大限制：该语言不支持struct成员函数指针。这一特性在其他更通用的处理器上通常是可以实现的，但在8051架构中却受到限制，导致间接调用成员函数时参数无法完全在寄存器中传递，从而引发编译错误。

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.遇到c51一个大坑，连sturct 成员函数指针都不支持,相关文档如下:
http://www.keil.com/support/docs/2066.htm
http://www.keil.com/forum/17469/
Basically, the 8051 is not "just another processor" that you can program as you would a PC, etc.
The 8051 architecture has some very specific optimisations that make it very good for some things,
and very poor for others - and function pointer is one of those things to which it is not well suited!

意味着连下面的代码都不支持

int ByteBuffer_WriteString(tagByteBuffer* obj, char *text)
{
return obj->WriteString(obj, text);
}

编译报错:

app\sctp\cbytebuffer.c(65): error C212: indirect call: parameters do not fit within registers