Language/Functions/syntax_t01.dart

/*
 * Copyright (c) 2011, 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.
 */
/**
 * @assertion Functions include function declarations, methods, getters,
 * setters, constructors and function literals.
 * All functions have a signature and a body.
 * functionSignature:
 *   metadata returnType? identifier formalParameterList
 * ;
 * returnType: void | type
 * ;
 * functionBody:
 *   async? '=>' expression ';' | (async | async* | sync*)? block
 * ;
 * block:
 *   '{' statements '}'
 * ;
 * @description Checks different variants of functions
 * @author msyabro
 */

void func() {}
void f(void f()) {}
x() => f(func);

class A {
  A() {}
  A.x() {}

  int f(int x) { throw ''; }
  A? func(var x) {}
  Object? obj() => null;

  int? _val;
  set val(int? v) => v;
  int? get val => _val;

  String? _s;
  set s(String? str) { str = _s; _s = str; }
  String? get s { Object a = new Object(); return "42"; }
}

main() {
  f(g(h())) {}
  int func([int? x = null, int? y = null, int? z = null]) => 3;
  int foo(Object x, var y) => func(1, 2, 3);
}