Class fields, part 3 (backends)

test/mjsunit/harmony/class-fields-evaluation-order.js

+// Copyright 2016 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-class-fields
+
+{
+  let effects = [];
+  class C {
+    a = (effects.push(0), 0);
+    a = (effects.push(1), 1);
+  }
+
+  let c = new C;
+  assertArrayEquals([0, 1], effects);
+  assertEquals(1, c.a);
+}
+
+{
+  let effects = [];
+  class C {
+    a = (effects.push(0), 0);
+    ['a'] = (effects.push(1), 1);
+  }
+
+  let c = new C;
+  assertArrayEquals([0, 1], effects);
+  assertEquals(1, c.a);
+}
+
+{
+  let effects = [];
+  class C {
+    static a = (effects.push(0), 0);
+    static a = (effects.push(1), 1);
+  }
+
+  assertArrayEquals([0, 1], effects);
+  assertEquals(1, C.a);
+}
+
+{
+  class C {
+    a = 0;
+    b = assertEquals(0, this.a);
+  }
+
+  new C;
+}
+
+{
+  let effects = [];
+
+  class C {
+    static [effects.push(0)] = effects.push(1);
+    [effects.push(2)] = effects.push(13);
+    static [effects.push(3)];
+    [effects.push(4)];
+    static [effects.push(5)](){}
+    [effects.push(6)](){}
+    static [effects.push(7)](){}
+    [effects.push(8)];
+    static [effects.push(9)];
+    [effects.push(10)] = effects.push(14);
+    static [effects.push(11)] = effects.push(12);
+
+    constructor() {
+      effects.push(15);
+    }
+  }
+  assertArrayEquals([0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12], effects);
+
+  new C;
+  assertArrayEquals([0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15], effects);
+}
+
+{
+  let effects = [];
+
+  class Base {
+    a = (effects.push(1), 0);
+
+    constructor() {
+      effects.push(2);
+      assertEquals(undefined, this.c);
+      assertEquals(0, this.a);
+      this.b = 1;
+    }
+  }
+
+  class Derived extends Base {
+    c = (assertEquals(0, this.a), assertEquals(1, this.b), effects.push(3), 2);
+
+    constructor() {
+      effects.push(0);
+      super();
+      effects.push(4);
+      assertEquals(2, this.c);
+    }
+  }
+
+  new Derived;
+  assertArrayEquals([0, 1, 2, 3, 4], effects);
+}