pkg/front_end/testcases/inference/infer_prefix_expression_custom.dart

// Copyright (c) 2017, 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.
// @dart=2.9
/*@testedFeatures=inference*/
library test;

class A {
  A();
  int operator ~() => 1;
  double operator -() => 2.0;
}

var a = new A();
var v_complement = /*@target=A.~*/ ~a;
var v_negate = /*@target=A.unary-*/ -a;

main() {
  a;
  v_complement;
  v_negate;
}