Language/Libraries_and_Scripts/Scripts/top_level_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 A script is a library whose exported namespace includes a
/// top-level function main().
///
/// libraryDefinition:
///   scriptTag? libraryName? importOrImport* partDirective* topLevelDefinition*
/// ;
/// topLevelDefinition:
///   classDefinition |
///   enumType |
///   typeAlias |
///   external? functionSignature ‘;’ |
///   external? getterSignature ‘;’ |
///   external? setterSignature ‘;’ |
///   functionSignature functionBody |
///   returnType? get identifier functionBody |
///   returnType? set identifier formalParameterList functionBody |
///   (final | const) type? staticFinalDeclarationList ‘;’ |
///   variableDeclaration ‘;’
/// ;
/// @description Checks that a script with valid top level definitions is parsed
/// without errors.
/// @author msyabro
/// @issue 42392


abstract class I {}
abstract class J<T> {}

class A {}
class B extends A {}
class C implements I {}
class D implements J<String> {}

f() {}
g(p1, p2) => p1 + p2;
A h([p1, p2]) {
  return new A();
}

typedef typeF();
typedef int typeG();
typedef void typeH(p1, p2);

external int extFunc(bool);
external int get extGetter;
external void set extSetter(int x);

final x = 'x';
String y = 'y';
var z;

int? a, b;
int c = 1;

get _x {}
set _y(p) {}

main() {
  new A();
  new B();
  new C();
  new D();

  f();
  g(1, 2);
  h('', "");

  typeF funcF = () => 1;
  typeG funcG = () { throw "Error"; };
  typeH funcH = (p1, p2) {};

  x;
  y;
  z;
  a;
  b;
  c;

  _x;
  _y = 1;
}