How to combine static_assert with sizeof and stringify?

Question

Memory usage is quite critical in my application. Therefore I have specific asserts that check for the memory size at compile time and give a static_assert if the size is d

Answer 1

As you discovered, the problem is here (also see this very similar question) :

#define CHECKMEM(mytype, size)  #sizeof(mytype)

It is not possible to do, because the stringification is done by the preprocessor, and sizeof is evaluated during the compilation.