如何使智能感知将当前源文件视为独立的翻译单元

Question

While refactoring our project sources for future use in other projects, we're encountering a problem: It's getting difficult to identify what really depends of what, because Intellisense magically fixes everything behind the scenes.

Example problem:

• "cc" source file #includes "ah" and then "bh"

• So "bh" should be able to use all "ah" without any #include because it is part of the "cc" translation unit

• While editing "bh" Intellisense "correctly" shows all definitions from "ah" which is awesome

But we need a way to make it evident that there is a missing #include "ah" at the top of "bh" for future reusing... Is there any way to make Intellisense treat "bh" as a standalone translation unit?

Edit: Changed the name of the Main source to "cc" for clarification, even if we do have circular includes in our code, it is not the actual problem we need to fix

Answer 1

For the sake of testing you could make a separate translation unit called test_b_h.c which only has

#include <b.h>

As it would not generate any target code it will not have an effect on the size of the resulting executable.

Answer 2

I'm not sure having a seperate translation unit is what you want here... #include is very unmagical (it just concatenates the files), and seperate translation units simply compile to seperate object files ("bh" is unlikely to be a sensible program by itself, as idomatically, headers don't contain anything for which storage is alloted in the object code).

I think what you're looking for is an include guard; try wrapping all of "bh" in somethng like the following:

#ifndef HAVE_B_H
# define HAVE_B_H

/* contents of "b.h" here */

#endif /* HAVE_B_H */

This allows you to just include it directly from the top of "ah" (as well as "ac"), ensuring it is visible everywhere and not multiply included. Actually this is good practice in general.