text: // Copyright 2019 the V8 project authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  
  // Flags: --harmony-private-methods
  
  "use strict";
  
  // Complementary private accessors.
  {
    let store = 1;
    class C {
      get #a() { return store; }
      set #a(val) { store = val; }
      incA() { this.#a++; }  // CountOperation
      setA(val) { this.#a = val; }
      getA() { return this.#a; }
    }
  
    const c = new C;
    assertEquals(store, c.getA());
    assertEquals(1, c.getA());
    c.setA(2);
    assertEquals(store, c.getA());
    assertEquals(2, c.getA());
    c.incA();
    assertEquals(store, c.getA());
    assertEquals(3, c.getA());
  }
  
  // Compound assignment.
  {
    let store;
    class A {
      get #a() { return store; }
      set #a(val) { store = val; }
      getA() { return this.#a; }
      constructor(val) {
        ({ y: this.#a } = val);
      }
    }
  
    const a = new A({y: 'test'});
    assertEquals('test', a.getA());
  }
  
  // Accessing super in private accessors.
  {
    class A { foo(val) {} }
    class C extends A {
      set #a(val) { super.foo(val); }
    }
    new C();
  
    class D extends A {
      get #a() { return super.foo; }
    }
    new D();
  
    class E extends A {
      set #a(val) { super.foo(val); }
      get #a() { return super.foo; }
    }
    new E();
  }
  
  // Nested private accessors.
  {
    class C {
      get #a() {
        let storeD = 'd';
        class D {
          // Shadows outer #a
          get #a() { return storeD; }
          getD() { return this.#a; }
        }
        return new D;
      }
      getA() {
        return this.#a;
      }
    }
    assertEquals('d', new C().getA().getD());
  }
  
  // Duplicate private accessors.
  // https://tc39.es/proposal-private-methods/#sec-static-semantics-early-errors
  {
    assertThrows('class C { get #a() {} get #a() {} }', SyntaxError);
    assertThrows('class C { set #a(val) {} set #a(val) {} }', SyntaxError);
  }
  