Which is the best way to suppress "unused variable" warning
c, clang, ios, objective-c
Solution
This is the approach I use: cross platform macro for silencing unused variables warning
It allows you to use one macro for any platform (although the definitions may differ, depending on the compiler), so it's a very portable approach to express your intention to popular compilers for C based languages. On GCC and Clang, it is equivalent of wrapping your third example (`#pragma unused(testString)`) into a macro.
Using the example from the linked answer:
- (void)testString:(NSString *)testString
{
MONUnusedParameter(testString);
}
I've found this approach best for portability and clarity, in use with some pretty large C, C++, ObjC, and ObjC++ codebases.
Problem
There are 3 (which I know) ways to suppress the "unused variable" warning. Any particular way is better than other ? First ``` - (void)testString:(NSString *)testString { (void)testString; } ``` Second ``` - (void)testString:(NSString *)__unused testString { } ``` Third ``` - (void)testString:(NSString *)testString { #pragma unused(testString) } ```