pkg/front_end/testcases/inference/infer_binary_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.

library test;

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

var v_add = new A() + 'foo';
var v_minus = new A() - 'bar';

main() {
  v_add;
  v_minus;
}