cocoacocoa-touchobjective csuppress-warningsxcode
Is there a way to suppress warnings in Xcode?
For example I am calling an undocumented method and since the method is not in the header I get a warning on compile. I know I can add it to my header to stop the warning, but I am wondering if there is a way other than adding it to the header (so I can keep the headers clean and standard) to suppress the warning? A pragma or something?
Remember that there's actually no such thing as "private methods" in Objective-C, and it's not just because it's a dynamic language. By design, Objective-C has visibility modifiers for ivars, but not for methods — it's not by accident that you can call any method you like.
@Peter's suggestion is a great one. To complement his answer, an alternative I've used (when I don't want/need a header just for private methods) is to declare a category in the unit test file itself. (I use @interface MyClass (Test) as the name.) This is a great way to add methods that would be unnecessary bloat in the release code, such as for accessing ivars that the class under test has access to. (This is obviously less of an issue when properties are used.)
I've found this approach makes it easy to expose and verify internal state, as well as adding test-only methods. For example, in this unit test file, I wrote an -isValid method for verifying correctness of a binary heap. In production, this method would be a waste of space, since I assume a heap is valid — I only care about it when testing for unit test regressions if I modify the code.
Starting with version 3.8 M6, Eclipse (to be exact: the JDT) has built-in functionality for this. It is configurable through a project's build path: Project properties > Java Build Path > Compiler > Source
Announced here: Eclipse 3.8 and 4.2 M6 - New and Noteworthy, called Selectively ignore errors/warnings from source folders. That's also where the screenshot is from. This is the new feature developed on the previously linked Bug 220928.
Best Answer
To disable warnings on a per-file basis, using Xcode 3 and llvm-gcc-4.2 you can use:
Where warning name is some gcc warning flag.
This overrides any warning flags on the command line. It doesn't work with all warnings though. Add -fdiagnostics-show-option to your CFLAGS and you can see which flag you can use to disable that warning.