Code that won't compile in C, C++ and Obj-C with a specific error message

Question

I'm replacing one C-style macro with another.

#define OldMacro(…) {…}

#define NewMacro(…) {…}

I'd like to rewrite the old version of the macro so that it fails to compile with a specific error message, ie something like: "OldMacro() is deprecated; use NewMacro() instead." Is this possible?

Also, I'd like this to work in C, C++ and Objective-C.

Answer 1

您可以使用此宏定义：

#define OLD_MACRO()  (error_use_of_OLD_MACRO_is_deprecated = 0)