Hi,

I want to mark some (member) functions as deprecated. The hope was gettting a hint from intellisense or the compiler when using such a method. But I never received a warning from Intellisense or the compiler.

I'm using Visual Studio 2015. I tried this for Arduino Uno and for ESP8266 with no differences:

#if defined(__GNUC__)
#define DEPRECATED __attribute__((deprecated)) // GCC
#elif defined(_MSC_VER)
#define DEPRECATED __declspec(deprecated)      // Intellisense
#else
#pragma message("WARNING: You need to implement DEPRECATED for this compiler")
#define DEPRECATED
#endif

class A {
public:
  DEPRECATED void foo();
};

void setup() {
  A q;
  q.foo();
}
 

The code compiles witout a warning.

In Visual Studio I tried the same with a standard console c++ program. There I got the message 
'A::foo': wurde als veraltet deklariert (German, meaning is, 'A::foo' is deprecated)

Yes, comments just above a function declaration are shown by intellisense. 

But I'm still unable to get a warning message to the output window or the error list window. Even a simple #warning statement like
   #warning "this is a warning"
has no effekt. #error works as expected. The compiler shows the message and terminates.

What do I have to do, that these warnings are displayed? I've spent a lot of time for searching for hints in the web. Unsuccessfully. Are there any switches, defines or anything similar I have to set up?

I'm using VS 2017, VM 19.0. I have tried several boards/compilers (ESP8266, Arduino uno, Arduino due (ARM)).

The VS output window has the title "Micro Build".

Thanks for the tip. That's it. I was quite blind.