library /*isNonNullableByDefault*/;
//
// Problems in library:
//
// pkg/front_end/testcases/nnbd/required.dart:29:8: Error: The parameter 'x' can't have a value of 'null' because of its type 'int', but the implicit default value is 'null'.
// Try adding either an explicit non-'null' default value or the 'required' modifier.
//   foo({x}) {}
//        ^
//
// pkg/front_end/testcases/nnbd/required.dart:51:18: Error: Non-optional parameters can't have a default value.
// Try removing the default value or making the parameter optional.
//   Function(int a = 42, [int b]) f2;
//                  ^
//
// pkg/front_end/testcases/nnbd/required.dart:52:17: Error: Non-optional parameters can't have a default value.
// Try removing the default value or making the parameter optional.
//   void g2(int a = 42, [int b]) {}
//                 ^
//
// pkg/front_end/testcases/nnbd/required.dart:53:15: Error: Non-optional parameters can't have a default value.
// Try removing the default value or making the parameter optional.
//   f2 = (int a = 42, [int b]) {};
//               ^
//
// pkg/front_end/testcases/nnbd/required.dart:48:15: Error: The parameter 'a' can't have a value of 'null' because of its type 'int', but the implicit default value is 'null'.
// Try adding either an explicit non-'null' default value or the 'required' modifier.
//   void g({int a, required int b = 42}) {}
//               ^
//
// pkg/front_end/testcases/nnbd/required.dart:48:31: Error: Named parameter 'b' is required and can't have a default value.
//   void g({int a, required int b = 42}) {}
//                               ^
//
// pkg/front_end/testcases/nnbd/required.dart:49:13: Error: The parameter 'a' can't have a value of 'null' because of its type 'int', but the implicit default value is 'null'.
// Try adding either an explicit non-'null' default value or the 'required' modifier.
//   f = ({int a, required int b = 42}) {};
//             ^
//
// pkg/front_end/testcases/nnbd/required.dart:49:29: Error: Named parameter 'b' is required and can't have a default value.
//   f = ({int a, required int b = 42}) {};
//                             ^
//
// pkg/front_end/testcases/nnbd/required.dart:52:28: Error: The parameter 'b' can't have a value of 'null' because of its type 'int', but the implicit default value is 'null'.
// Try adding either an explicit non-'null' default value or the 'required' modifier.
//   void g2(int a = 42, [int b]) {}
//                            ^
//
// pkg/front_end/testcases/nnbd/required.dart:53:26: Error: The parameter 'b' can't have a value of 'null' because of its type 'int', but the implicit default value is 'null'.
// Try adding either an explicit non-'null' default value or the 'required' modifier.
//   f2 = (int a = 42, [int b]) {};
//                          ^
//
import self as self;
import "dart:core" as core;

typedef Typedef1 = ({a: core::int, required b: core::int}) → dynamic;
typedef Typedef2 = ({a: core::int, required b: core::int}) → dynamic;
class Class extends core::Object {
  synthetic constructor •() → self::Class
    : super core::Object::•()
    ;
  method method({core::int a = #C1, required core::int b = #C2, required final core::int c = #C2, required covariant final core::int d = #C2}) → dynamic {}
}
abstract class A extends core::Object {
  synthetic constructor •() → self::A
    : super core::Object::•()
    ;
  abstract method foo({core::int x = #C2}) → dynamic;
}
class B extends self::A {
  synthetic constructor •() → self::B
    : super self::A::•()
    ;
  method foo({core::int x = #C2}) → dynamic {}
}
class C extends self::A {
  synthetic constructor •() → self::C
    : super self::A::•()
    ;
  method foo({core::int x = #C1}) → dynamic {}
}
static field ({a: core::int, required b: core::int}) → dynamic field = ({core::int a = #C1, required core::int b = #C2}) → Null {};
static method method({core::int a = #C1, required core::int b = #C2, required final core::int c = #C2}) → dynamic {}
static method ok() → dynamic {
  ({a: core::int, required b: core::int}) → dynamic f;
  function g({core::int a = #C1, required core::int b = #C2}) → void {}
  f = ({core::int a = #C1, required core::int b = #C2}) → Null {};
  (core::int, [core::int]) → dynamic f2;
  function g2(core::int a, [core::int b = #C1]) → void {}
  f2 = (core::int a, [core::int b = #C1]) → Null {};
}
static method error() → dynamic {
  ({a: core::int, required b: core::int}) → dynamic f;
  function g({core::int a = #C2, required core::int b = #C1}) → void {}
  f = ({core::int a = #C2, required core::int b = #C1}) → Null {};
  (core::int, [core::int]) → dynamic f2;
  function g2(core::int a = #C1, [core::int b = #C2]) → void {}
  f2 = (core::int a = #C1, [core::int b = #C2]) → Null {};
}
static method main() → dynamic {}

constants  {
  #C1 = 42
  #C2 = null
}