============================================
Include directives
============================================

#include "some/path.h"
#include <stdint.h>

---

(translation_unit
  (preproc_include (string_literal))
  (preproc_include (system_lib_string)))

============================================
Object-like macro definitions
============================================

#define ONE
#define TWO int a = b;
#define THREE \
  c == d ? \
  e : \
  f

---

(translation_unit
  (preproc_def (identifier))
  (preproc_def (identifier) (preproc_arg))
  (preproc_def (identifier) (preproc_arg)))

============================================
Function-like macro definitions
============================================

#define ONE() a
#define TWO(b) c
#define THREE(d, e) f
#define FOUR(...) g
#define FIVE(h, i, ...) j

---

(translation_unit
  (preproc_function_def (identifier) (preproc_params) (preproc_arg))
  (preproc_function_def (identifier) (preproc_params (identifier)) (preproc_arg))
  (preproc_function_def (identifier) (preproc_params (identifier) (identifier)) (preproc_arg))
  (preproc_function_def (identifier) (preproc_params) (preproc_arg))
  (preproc_function_def (identifier) (preproc_params (identifier) (identifier)) (preproc_arg)))

============================================
Ifdefs
============================================

#ifndef DEFINE1
int j;
#endif

#ifdef DEFINE2
ssize_t b;
#define c 32
#else
int b;
#define c 16
#endif

#ifdef DEFINE2
#else
#ifdef DEFINE3
#else
#endif
#endif

---

(translation_unit
  (preproc_ifdef
    (identifier)
    (declaration (identifier) (identifier)))

  (preproc_ifdef
    (identifier)
    (declaration (identifier) (identifier))
    (preproc_def (identifier) (preproc_arg))
    (preproc_else
      (declaration (identifier) (identifier))
      (preproc_def (identifier) (preproc_arg))))

  (preproc_ifdef
    (identifier)
    (preproc_else
      (preproc_ifdef
        (identifier)
        (preproc_else)))))