#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <assert.h>

// BROKEN: missing backslashes to continue macro definition

#define call_fn_with_logging(fn) do {
    printf("Entering %s\n", (#fn));
    fn();
    printf("Leaving %s\n", (#fn));
} while(false)




void greet() {
    printf("Hey, hey!\n");
}

int main(int argc, char* argv[]) {

    call_fn_with_logging( greet );
    // Expand to something equivalent to this:
    //   printf("Entering greet\n");
    //   greet();
    //   printf("Leaving greet\n");
    
    return EXIT_SUCCESS;
}
/*
e.c:9:9: error: expected declaration specifiers or ‘...’ before string constant
  printf("Entering %s\n", (#fn));
         ^~~~~~~~~~~~~~~
e.c:9:26: error: expected declaration specifiers or ‘...’ before ‘(’ token
  printf("Entering %s\n", (#fn));
                          ^
e.c:9:27: error: stray ‘#’ in program
  printf("Entering %s\n", (#fn));
                           ^
e.c:10:2: warning: data definition has no type or storage class
  fn();
  ^~
e.c:10:2: warning: type defaults to ‘int’ in declaration of ‘fn’ [-Wimplicit-int]
e.c:11:9: error: expected declaration specifiers or ‘...’ before string constant
  printf("Leaving %s\n", (#fn));
         ^~~~~~~~~~~~~~
e.c:11:25: error: expected declaration specifiers or ‘...’ before ‘(’ token
  printf("Leaving %s\n", (#fn));
                         ^
e.c:11:26: error: stray ‘#’ in program
  printf("Leaving %s\n", (#fn));
                          ^
e.c:12:1: error: expected identifier or ‘(’ before ‘}’ token
 } while(false)
 ^
e.c:12:3: error: expected identifier or ‘(’ before ‘while’
 } while(false)
   ^~~~~
e.c: In function ‘main’:
e.c:30:1: error: expected ‘while’ at end of input
 }
 ^
e.c:30:1: error: expected declaration or statement at end of input
 */
/* vim: set tabstop=4 shiftwidth=4 fileencoding=utf-8 noexpandtab: */