How can I print the result of sizeof() at compile time in C?

Question

How can I print the result of sizeof() at compile time in C?

For now I am using a static assert (home brewed based on other web resources) to compare the sizeof() re

Answer 1

//main.cpp
#include 
template 
struct show_size;

void foo()
{
    show_size();//!!please change `my_type` to your expected
}

int main()
{
    return 0;
}

You can compile this pretty simple code, and during its pre-compilation stage, the compiler will give error, in which the sizeof(my_type) will give concrete value. e.g.:

g++ main.cpp