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

#include "some/path.h"
#include <stdint.h>
#include MACRO
#include MACRO(arg1, arg2)

--------------------------------------------------------------------------------

(translation_unit
  (preproc_include
    path: (string_literal
      (string_content)))
  (preproc_include
    path: (system_lib_string))
  (preproc_include
    path: (identifier))
  (preproc_include
    path: (call_expression
      function: (identifier)
      arguments: (argument_list
        (identifier)
        (identifier)))))

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

#define ONE
    #define TWO int a = b;
#define THREE \
  c == d ? \
  e : \
  f
#define FOUR (mno * pq)
#define FIVE(a,b) x \
                  + y
#define SIX(a,   \
            b) x \
               + y
#define SEVEN 7/* seven has an
                * annoying comment */
#define EIGHT(x) do { \
        x = x + 1;  \
        x = x / 2;  \
    } while (x > 0);

--------------------------------------------------------------------------------

(translation_unit
  (preproc_def
    name: (identifier))
  (preproc_def
    name: (identifier)
    value: (preproc_arg))
  (preproc_def
    name: (identifier)
    value: (preproc_arg))
  (preproc_def
    name: (identifier)
    value: (preproc_arg))
  (preproc_function_def
    name: (identifier)
    parameters: (preproc_params
      (identifier)
      (identifier))
    value: (preproc_arg))
  (preproc_function_def
    name: (identifier)
    parameters: (preproc_params
      (identifier)
      (identifier))
    value: (preproc_arg))
  (preproc_def
    name: (identifier)
    value: (preproc_arg)
    (comment))
  (preproc_function_def
    name: (identifier)
    parameters: (preproc_params
      (identifier))
    value: (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
    name: (identifier)
    parameters: (preproc_params)
    value: (preproc_arg))
  (preproc_function_def
    name: (identifier)
    parameters: (preproc_params
      (identifier))
    value: (preproc_arg))
  (preproc_function_def
    name: (identifier)
    parameters: (preproc_params
      (identifier)
      (identifier))
    value: (preproc_arg))
  (preproc_function_def
    name: (identifier)
    parameters: (preproc_params)
    value: (preproc_arg))
  (preproc_function_def
    name: (identifier)
    parameters: (preproc_params
      (identifier)
      (identifier))
    value: (preproc_arg)))

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

#ifndef DEFINE1
int j;
#endif

#ifdef DEFINE2
ssize_t b;
#define c 32
#elif defined DEFINE3
#else
int b;
#define c 16
#endif

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

--------------------------------------------------------------------------------

(translation_unit
  (preproc_ifdef
    name: (identifier)
    (declaration
      type: (primitive_type)
      declarator: (identifier)))
  (preproc_ifdef
    name: (identifier)
    (declaration
      type: (primitive_type)
      declarator: (identifier))
    (preproc_def
      name: (identifier)
      value: (preproc_arg))
    alternative: (preproc_elif
      condition: (preproc_defined
        (identifier))
      alternative: (preproc_else
        (declaration
          type: (primitive_type)
          declarator: (identifier))
        (preproc_def
          name: (identifier)
          value: (preproc_arg)))))
  (preproc_ifdef
    name: (identifier)
    alternative: (preproc_else
      (preproc_ifdef
        name: (identifier)
        alternative: (preproc_else)))))

================================================================================
Elifdefs
================================================================================

#ifndef DEFINE1
int j;
#elifndef DEFINE2
int k;
#endif

#ifdef DEFINE2
ssize_t b;
#elifdef DEFINE3
ssize_t c;
#else
int b;
#endif

--------------------------------------------------------------------------------

(translation_unit
  (preproc_ifdef
    (identifier)
    (declaration
      (primitive_type)
      (identifier))
    (preproc_elifdef
      (identifier)
      (declaration
        (primitive_type)
        (identifier))))
  (preproc_ifdef
    (identifier)
    (declaration
      (primitive_type)
      (identifier))
    (preproc_elifdef
      (identifier)
      (declaration
        (primitive_type)
        (identifier))
      (preproc_else
        (declaration
          (primitive_type)
          (identifier))))))

================================================================================
Mixing #elif and #elifdef
================================================================================

#ifndef DEFINE1
int i;
#elif  defined(DEFINE2)
int j;
#endif

#if defined DEFINE3
int a;
#elifdef DEFINE4
int b;
#else
int c;
#endif

--------------------------------------------------------------------------------

(translation_unit
  (preproc_ifdef
    name: (identifier)
    (declaration
      type: (primitive_type)
      declarator: (identifier))
    alternative: (preproc_elif
      condition: (preproc_defined
        (identifier))
      (declaration
        type: (primitive_type)
        declarator: (identifier))))
  (preproc_if
    condition: (preproc_defined
      (identifier))
    (declaration
      type: (primitive_type)
      declarator: (identifier))
    alternative: (preproc_elifdef
      name: (identifier)
      (declaration
        type: (primitive_type)
        declarator: (identifier))
      alternative: (preproc_else
        (declaration
          type: (primitive_type)
          declarator: (identifier))))))

================================================================================
General if blocks
================================================================================

#if defined(__GNUC__) && defined(__PIC__)
#define inline inline __attribute__((always_inline))
#elif defined(_WIN32)
#define something
#elif !defined(SOMETHING_ELSE)
#define SOMETHING_ELSE
#else
#include <something>
#endif

--------------------------------------------------------------------------------

(translation_unit
  (preproc_if
    condition: (binary_expression
      left: (preproc_defined
        (identifier))
      right: (preproc_defined
        (identifier)))
    (preproc_def
      name: (identifier)
      value: (preproc_arg))
    alternative: (preproc_elif
      condition: (preproc_defined
        (identifier))
      (preproc_def
        name: (identifier))
      alternative: (preproc_elif
        condition: (unary_expression
          argument: (preproc_defined
            (identifier)))
        (preproc_def
          name: (identifier))
        alternative: (preproc_else
          (preproc_include
            path: (system_lib_string)))))))

================================================================================
Preprocessor conditionals in functions
================================================================================

int main() {
  #if d
    puts("1");
  #else
    puts("2");
  #endif

  #if a
    return 0;
  #elif b
    return 1;
  #elif c
    return 2;
  #else
    return 3;
  #endif
}

--------------------------------------------------------------------------------

(translation_unit
  (function_definition
    (primitive_type)
    (function_declarator
      (identifier)
      (parameter_list))
    (compound_statement
      (preproc_if
        (identifier)
        (expression_statement
          (call_expression
            (identifier)
            (argument_list
              (string_literal
                (string_content)))))
        (preproc_else
          (expression_statement
            (call_expression
              (identifier)
              (argument_list
                (string_literal
                  (string_content)))))))
      (preproc_if
        (identifier)
        (return_statement
          (number_literal))
        (preproc_elif
          (identifier)
          (return_statement
            (number_literal))
          (preproc_elif
            (identifier)
            (return_statement
              (number_literal))
            (preproc_else
              (return_statement
                (number_literal)))))))))

================================================================================
Preprocessor conditionals in struct/union bodies
================================================================================

struct S {
#ifdef _WIN32
  LONG f2;
#else
  uint32_t f2;
#endif
};

--------------------------------------------------------------------------------

(translation_unit
  (struct_specifier
    (type_identifier)
    (field_declaration_list
      (preproc_ifdef
        (identifier)
        (field_declaration
          (type_identifier)
          (field_identifier))
        (preproc_else
          (field_declaration
            (primitive_type)
            (field_identifier)))))))

================================================================================
Unknown preprocessor directives
================================================================================

#pragma mark - UIViewController

--------------------------------------------------------------------------------

(translation_unit
  (preproc_call
    directive: (preproc_directive)
    argument: (preproc_arg)))

================================================================================
Preprocessor expressions
================================================================================

#if A(B || C) && \
    !D(F)

uint32_t a;

#endif

--------------------------------------------------------------------------------

(translation_unit
  (preproc_if
    (binary_expression
      (call_expression
        (identifier)
        (argument_list
          (binary_expression
            (identifier)
            (identifier))))
      (unary_expression
        (call_expression
          (identifier)
          (argument_list
            (identifier)))))
    (declaration
      (primitive_type)
      (identifier))))