Wow, __builtin_dump_struct is an amazing clang feature, how did I never hear about this before?

$ cat test.c
#include <stdio.h>

struct nested {
  int n;
};
struct foo {
  int member_a;
  unsigned long member_b;
  char *str;
  void *ptr;
  struct nested nested;
};

int main(void) {
  struct foo f = {
    .member_a = 123,
    .member_b = 0x4141414141414141,
    .str = "foobar",
    .ptr = &f,
    .nested = {.n = 42}
  };
  __builtin_dump_struct(&f, printf);
}
$ clang -o test test.c && ./test
struct foo {
  int member_a = 123
  unsigned long member_b = 4702111234474983745
  char * str = "foobar"
  void * ptr = 0x7fff1df41b78
  struct nested nested = {
    int n = 42
  }
}

The original version of this feature was introduced back in 2018 (though it was reimplemented since in 2022).