library;
//
// Problems in library:
//
// pkg/front_end/testcases/general/optional.dart:47:21: Error: The argument type 'InvalidListener' can't be assigned to the parameter type 'Listener'.
//  - 'InvalidListener' is from 'pkg/front_end/testcases/general/optional.dart'.
//  - 'Listener' is from 'pkg/front_end/testcases/general/optional.dart'.
//   extern.listen(new InvalidListener());
//                     ^
//
// pkg/front_end/testcases/general/optional.dart:49:28: Error: Too few positional arguments: 1 required, 0 given.
//   var nothing1 = foo.method();
//                            ^
//
// pkg/front_end/testcases/general/optional.dart:50:28: Error: Too many positional arguments: 3 allowed, but 4 found.
// Try removing the extra positional arguments.
//   var nothing2 = foo.method(1, 2, 3, 4);
//                            ^
//
// pkg/front_end/testcases/general/optional.dart:51:39: Error: Too few positional arguments: 1 required, 0 given.
//   var nothing3 = extern.externalMethod();
//                                       ^
//
// pkg/front_end/testcases/general/optional.dart:52:39: Error: Too many positional arguments: 3 allowed, but 4 found.
// Try removing the extra positional arguments.
//   var nothing4 = extern.externalMethod(1, 2, 3, 4);
//                                       ^
//
import self as self;
import "dart:core" as core;

class Foo extends core::Object {
  synthetic constructor •() → self::Foo*
    : super core::Object::•()
    ;
  method method(dynamic x, [dynamic y = #C1, dynamic z = #C1]) → dynamic {
    return "string";
  }
  abstract member-signature get _identityHashCode() → core::int*; -> core::Object::_identityHashCode
  abstract member-signature method _instanceOf(dynamic instantiatorTypeArguments, dynamic functionTypeArguments, dynamic type) → core::bool*; -> core::Object::_instanceOf
  abstract member-signature method _simpleInstanceOf(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOf
  abstract member-signature method _simpleInstanceOfTrue(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfTrue
  abstract member-signature method _simpleInstanceOfFalse(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfFalse
  abstract member-signature operator ==(dynamic other) → core::bool*; -> core::Object::==
  abstract member-signature get hashCode() → core::int*; -> core::Object::hashCode
  abstract member-signature method toString() → core::String*; -> core::Object::toString
  abstract member-signature method noSuchMethod(core::Invocation* invocation) → dynamic; -> core::Object::noSuchMethod
  abstract member-signature get runtimeType() → core::Type*; -> core::Object::runtimeType
}
abstract class External extends core::Object {
  synthetic constructor •() → self::External*
    : super core::Object::•()
    ;
  abstract method externalMethod(core::int* x, [core::int* y = #C1, core::int* z = #C1]) → core::String*;
  abstract method listen(self::Listener* listener) → void;
  abstract member-signature get _identityHashCode() → core::int*; -> core::Object::_identityHashCode
  abstract member-signature method _instanceOf(dynamic instantiatorTypeArguments, dynamic functionTypeArguments, dynamic type) → core::bool*; -> core::Object::_instanceOf
  abstract member-signature method _simpleInstanceOf(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOf
  abstract member-signature method _simpleInstanceOfTrue(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfTrue
  abstract member-signature method _simpleInstanceOfFalse(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfFalse
  abstract member-signature operator ==(dynamic other) → core::bool*; -> core::Object::==
  abstract member-signature get hashCode() → core::int*; -> core::Object::hashCode
  abstract member-signature method toString() → core::String*; -> core::Object::toString
  abstract member-signature method noSuchMethod(core::Invocation* invocation) → dynamic; -> core::Object::noSuchMethod
  abstract member-signature get runtimeType() → core::Type*; -> core::Object::runtimeType
}
abstract class Listener extends core::Object {
  synthetic constructor •() → self::Listener*
    : super core::Object::•()
    ;
  abstract method event(core::String* input, [core::int* x = #C1, core::int* y = #C1]) → void;
  abstract member-signature get _identityHashCode() → core::int*; -> core::Object::_identityHashCode
  abstract member-signature method _instanceOf(dynamic instantiatorTypeArguments, dynamic functionTypeArguments, dynamic type) → core::bool*; -> core::Object::_instanceOf
  abstract member-signature method _simpleInstanceOf(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOf
  abstract member-signature method _simpleInstanceOfTrue(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfTrue
  abstract member-signature method _simpleInstanceOfFalse(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfFalse
  abstract member-signature operator ==(dynamic other) → core::bool*; -> core::Object::==
  abstract member-signature get hashCode() → core::int*; -> core::Object::hashCode
  abstract member-signature method toString() → core::String*; -> core::Object::toString
  abstract member-signature method noSuchMethod(core::Invocation* invocation) → dynamic; -> core::Object::noSuchMethod
  abstract member-signature get runtimeType() → core::Type*; -> core::Object::runtimeType
}
class TestListener extends self::Listener {
  synthetic constructor •() → self::TestListener*
    : super self::Listener::•()
    ;
  method event(core::String* input, [core::int* x = #C1, core::int* y = #C1]) → void {}
}
class ExtendedListener extends self::Listener {
  synthetic constructor •() → self::ExtendedListener*
    : super self::Listener::•()
    ;
  method event(core::String* input, [core::int* x = #C1, core::int* y = #C1, dynamic z = #C1]) → void {}
}
class InvalidListener extends core::Object {
  synthetic constructor •() → self::InvalidListener*
    : super core::Object::•()
    ;
  method event(dynamic input, [dynamic x = #C1]) → void {}
  abstract member-signature get _identityHashCode() → core::int*; -> core::Object::_identityHashCode
  abstract member-signature method _instanceOf(dynamic instantiatorTypeArguments, dynamic functionTypeArguments, dynamic type) → core::bool*; -> core::Object::_instanceOf
  abstract member-signature method _simpleInstanceOf(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOf
  abstract member-signature method _simpleInstanceOfTrue(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfTrue
  abstract member-signature method _simpleInstanceOfFalse(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfFalse
  abstract member-signature operator ==(dynamic other) → core::bool*; -> core::Object::==
  abstract member-signature get hashCode() → core::int*; -> core::Object::hashCode
  abstract member-signature method toString() → core::String*; -> core::Object::toString
  abstract member-signature method noSuchMethod(core::Invocation* invocation) → dynamic; -> core::Object::noSuchMethod
  abstract member-signature get runtimeType() → core::Type*; -> core::Object::runtimeType
}
external static method createExternal() → self::External*;
static method main() → dynamic {
  self::Foo* foo = new self::Foo::•();
  dynamic string1 = foo.{self::Foo::method}(1);
  dynamic string2 = foo.{self::Foo::method}(1, 2);
  dynamic string3 = foo.{self::Foo::method}(1, 2, 3);
  self::External* extern = self::createExternal();
  core::String* string4 = extern.{self::External::externalMethod}(1);
  core::String* string5 = extern.{self::External::externalMethod}(1, 2);
  core::String* string6 = extern.{self::External::externalMethod}(1, 2, 3);
  extern.{self::External::listen}(new self::TestListener::•());
  extern.{self::External::listen}(new self::ExtendedListener::•());
  extern.{self::External::listen}(let final Never* #t1 = invalid-expression "pkg/front_end/testcases/general/optional.dart:47:21: Error: The argument type 'InvalidListener' can't be assigned to the parameter type 'Listener'.
 - 'InvalidListener' is from 'pkg/front_end/testcases/general/optional.dart'.
 - 'Listener' is from 'pkg/front_end/testcases/general/optional.dart'.
  extern.listen(new InvalidListener());
                    ^" in new self::InvalidListener::•() as{TypeError} self::Listener*);
  invalid-type nothing1 = let final Never* #t2 = invalid-expression "pkg/front_end/testcases/general/optional.dart:49:28: Error: Too few positional arguments: 1 required, 0 given.
  var nothing1 = foo.method();
                           ^" in foo.{self::Foo::method}();
  invalid-type nothing2 = let final Never* #t3 = invalid-expression "pkg/front_end/testcases/general/optional.dart:50:28: Error: Too many positional arguments: 3 allowed, but 4 found.
Try removing the extra positional arguments.
  var nothing2 = foo.method(1, 2, 3, 4);
                           ^" in foo.{self::Foo::method}(1, 2, 3, 4);
  invalid-type nothing3 = let final Never* #t4 = invalid-expression "pkg/front_end/testcases/general/optional.dart:51:39: Error: Too few positional arguments: 1 required, 0 given.
  var nothing3 = extern.externalMethod();
                                      ^" in extern.{self::External::externalMethod}();
  invalid-type nothing4 = let final Never* #t5 = invalid-expression "pkg/front_end/testcases/general/optional.dart:52:39: Error: Too many positional arguments: 3 allowed, but 4 found.
Try removing the extra positional arguments.
  var nothing4 = extern.externalMethod(1, 2, 3, 4);
                                      ^" in extern.{self::External::externalMethod}(1, 2, 3, 4);
}

constants  {
  #C1 = null
}