pkgs/ffigen/test/header_parser_tests/struct_fptr_fields.h

// Copyright (c) 2021, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

typedef int (*ArithmeticOperation)(int a, int b);

struct S {
  // Function pointer field, but no parameters.
  int (*func1)(void);
  // Function pointer field with parameters.
  int (*comparator)(int a, int b);
  // Function pointer field with lot of parameters
  int (*veryManyArguments)(double a, float b, char *c, int d, long long e);
  // Function pointer field with parameters, but no names
  int (*argsDontHaveNames)(int, int, int, float, char *);
  // Function pointer through typedef
  ArithmeticOperation operation;
  // Pointer to function pointer
  void (**sortPtr)(int *array, int len);
  // Function pointer with a function pointer parameter
  void (*sortBy)(int *array, int len, int (*evaluator)(int x));
  // Function where few parameters are named. This should not
  // produce parameters in output.
  void (*improperlyDeclaredParams)(int a, int, char);
  // Function pointer with 2 function pointer parameters
  void (*sortByWithFallback)(int *array, int (*primaryEvaluator)(int x),
                             int (*fallbackEvaluator)(int x));

  // TODO(https://github.com/dart-lang/ffigen/issues/545): Handle remaining
  // cases of parsing param names.
  // ---
  // Array of function pointers. Does not produce proper output right now.
  void (*manyFunctions[2])(char a, char b);
  // Function pointer returning function pointer. Does not produce valid output.
  int (*(*functionReturningFunction)(int a, int b))(int c, int d);
  // Function pointer returning function pointer. The return type has param
  // names, but the function itself doesn't. This also shouldn't produce
  // any parameters in output.
  int (*(*functionReturningFunctionImproper)(int a, int b))(int, int);
};