// Errors:
//
// pkg/front_end/testcases/regress/issue_31183.dart:6:12: Error: Unexpected token 'unary'.
//   operator unary- => 0;
//            ^^^^^
//
// pkg/front_end/testcases/regress/issue_31183.dart:6:17: Error: A method declaration needs an explicit list of parameters.
// Try adding a parameter list to the method declaration.
//   operator unary- => 0;
//                 ^

library;
import self as self;
import "dart:core" as core;

class C extends core::Object {
  synthetic constructor •() → void
    : super core::Object::•()
    ;
  operator unary-() → dynamic
    return 0;
}
static method main() → dynamic {
  new self::C::•();
}