MSVC equivalent of __attribute__ ((warn_unused_result))?

Question

I\'m finding __attribute__ ((warn_unused_result)) to be very useful as a means of encouraging developers not to ignore error codes returned by functions, but I

Answer 1

It's _Check_return_. See here for examples of similar annotations and here for function behaviour. It's supported since MSVC 2012.

Example:

_Check_return_
int my_return_must_be_checked() {
    return 42;
}