Remove runtime flags for Proxy and Reflect

test/mjsunit/harmony/proxies-example-membrane.js

-// Copyright 2011 the V8 project authors. All rights reserved.
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-//       notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-//       copyright notice, this list of conditions and the following
-//       disclaimer in the documentation and/or other materials provided
-//       with the distribution.
-//     * Neither the name of Google Inc. nor the names of its
-//       contributors may be used to endorse or promote products derived
-//       from this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// Flags: --harmony --harmony-proxies
-
-
-
-// A simple membrane. Adapted from:
-// http://wiki.ecmascript.org/doku.php?id=harmony:proxies#a_simple_membrane
-
-function createSimpleMembrane(target) {
-  let enabled = true;
-
-  function wrap(obj) {
-    if (obj !== Object(obj)) return obj;
-
-    let handler = new Proxy({}, {get: function(_, key) {
-      if (!enabled) throw new Error("disabled");
-      switch (key) {
-      case "apply":
-        return (_, that, args) => {
-          try {
-            return wrap(Reflect.apply(
-                obj, wrap(that), args.map((x) => wrap(x))));
-          } catch(e) {
-            throw wrap(e);
-          }
-        }
-      case "construct":
-        return (_, args, newt) => {
-          try {
-            return wrap(Reflect.construct(
-                obj, args.map((x) => wrap(x)), wrap(newt)));
-          } catch(e) {
-            throw wrap(e);
-          }
-        }
-      default:
-        return (_, ...args) => {
-          try {
-            return wrap(Reflect[key](obj, ...(args.map(wrap))));
-          } catch(e) {
-            throw wrap(e);
-          }
-        }
-      }
-    }});
-
-    return new Proxy(obj, handler);
-  }
-
-  const gate = Object.freeze({
-    enable: () => enabled = true,
-    disable: () => enabled = false
-  });
-
-  return Object.freeze({
-    wrapper: wrap(target),
-    gate: gate
-  });
-}
-
-
-// Test the simple membrane.
-{
-  var o = {
-    a: 6,
-    b: {bb: 8},
-    f: function(x) { return x },
-    g: function(x) { return x.a },
-    h: function(x) { this.q = x }
-  };
-  o[2] = {c: 7};
-  var m = createSimpleMembrane(o);
-  var w = m.wrapper;
-  var f = w.f;
-  var x = f(66);
-  var x = f({a: 1});
-  var x = w.f({a: 1});
-  var a = x.a;
-  assertEquals(6, w.a);
-  assertEquals(8, w.b.bb);
-  assertEquals(7, w[2]["c"]);
-  assertEquals(undefined, w.c);
-  assertEquals(1, w.f(1));
-  assertEquals(1, w.f({a: 1}).a);
-  assertEquals(2, w.g({a: 2}));
-  assertEquals(3, (w.r = {a: 3}).a);
-  assertEquals(3, w.r.a);
-  assertEquals(3, o.r.a);
-  w.h(3);
-  assertEquals(3, w.q);
-  assertEquals(3, o.q);
-  assertEquals(4, (new w.h(4)).q);
-
-  var wb = w.b;
-  var wr = w.r;
-  var wf = w.f;
-  var wf3 = w.f(3);
-  var wfx = w.f({a: 6});
-  var wgx = w.g({a: {aa: 7}});
-  var wh4 = new w.h(4);
-  m.gate.disable();
-  assertEquals(3, wf3);
-  assertThrows(function() { w.a }, Error);
-  assertThrows(function() { w.r }, Error);
-  assertThrows(function() { w.r = {a: 4} }, Error);
-  assertThrows(function() { o.r.a }, Error);
-  assertEquals("object", typeof o.r);
-  assertEquals(5, (o.r = {a: 5}).a);
-  assertEquals(5, o.r.a);
-  assertThrows(function() { w[1] }, Error);
-  assertThrows(function() { w.c }, Error);
-  assertThrows(function() { wb.bb }, Error);
-  assertThrows(function() { wr.a }, Error);
-  assertThrows(function() { wf(4) }, Error);
-  assertThrows(function() { wfx.a }, Error);
-  assertThrows(function() { wgx.aa }, Error);
-  assertThrows(function() { wh4.q }, Error);
-
-  m.gate.enable();
-  assertEquals(6, w.a);
-  assertEquals(5, w.r.a);
-  assertEquals(5, o.r.a);
-  assertEquals(7, w.r = 7);
-  assertEquals(7, w.r);
-  assertEquals(7, o.r);
-  assertEquals(8, w.b.bb);
-  assertEquals(7, w[2]["c"]);
-  assertEquals(undefined, w.c);
-  assertEquals(8, wb.bb);
-  assertEquals(3, wr.a);
-  assertEquals(4, wf(4));
-  assertEquals(3, wf3);
-  assertEquals(6, wfx.a);
-  assertEquals(7, wgx.aa);
-  assertEquals(4, wh4.q);
-}
-
-
-
-// An identity-preserving membrane. Adapted from:
-// http://wiki.ecmascript.org/doku.php?id=harmony:proxies#an_identity-preserving_membrane
-
-function createMembrane(target) {
-  const wet2dry = 0;
-  const dry2wet = 1;
-
-  function flip(dir) { return (dir + 1) % 2 }
-
-  let maps = [new WeakMap(), new WeakMap()];
-
-  let revoked = false;
-
-  function wrap(dir, obj) {
-    if (obj !== Object(obj)) return obj;
-
-    let wrapper = maps[dir].get(obj);
-    if (wrapper) return wrapper;
-
-    let handler = new Proxy({}, {get: function(_, key) {
-      if (revoked) throw new Error("revoked");
-      switch (key) {
-      case "apply":
-        return (_, that, args) => {
-          try {
-            return wrap(dir, Reflect.apply(
-                obj, wrap(flip(dir), that),
-                args.map((x) => wrap(flip(dir), x))));
-          } catch(e) {
-            throw wrap(dir, e);
-          }
-        }
-      case "construct":
-        return (_, args, newt) => {
-          try {
-            return wrap(dir, Reflect.construct(
-                obj, args.map((x) => wrap(flip(dir), x)),
-                wrap(flip(dir), newt)));
-          } catch(e) {
-            throw wrap(dir, e);
-          }
-        }
-      default:
-        return (_, ...args) => {
-          try {
-            return wrap(dir, Reflect[key](
-                obj, ...(args.map((x) => wrap(flip(dir), x)))))
-          } catch(e) {
-            throw wrap(dir, e);
-          }
-        }
-      }
-    }});
-
-    wrapper = new Proxy(obj, handler);
-    maps[dir].set(obj, wrapper);
-    maps[flip(dir)].set(wrapper, obj);
-    return wrapper;
-  }
-
-  const gate = Object.freeze({
-    revoke: () => revoked = true
-  });
-
-  return Object.freeze({
-    wrapper: wrap(wet2dry, target),
-    gate: gate
-  });
-}
-
-
-// Test the identity-preserving membrane.
-{
-  var receiver
-  var argument
-  var o = {
-    a: 6,
-    b: {bb: 8},
-    f: function(x) {receiver = this; argument = x; return x},
-    g: function(x) {receiver = this; argument = x; return x.a},
-    h: function(x) {receiver = this; argument = x; this.q = x},
-    s: function(x) {receiver = this; argument = x; this.x = {y: x}; return this}
-  }
-  o[2] = {c: 7}
-  var m = createMembrane(o)
-  var w = m.wrapper
-  var f = w.f
-  var x = f(66)
-  var x = f({a: 1})
-  var x = w.f({a: 1})
-  var a = x.a
-  assertEquals(6, w.a)
-  assertEquals(8, w.b.bb)
-  assertEquals(7, w[2]["c"])
-  assertEquals(undefined, w.c)
-  assertEquals(1, w.f(1))
-  assertSame(o, receiver)
-  assertEquals(1, w.f({a: 1}).a)
-  assertSame(o, receiver)
-  assertEquals(2, w.g({a: 2}))
-  assertSame(o, receiver)
-  assertSame(w, w.f(w))
-  assertSame(o, receiver)
-  assertSame(o, argument)
-  assertSame(o, w.f(o))
-  assertSame(o, receiver)
-  // Note that argument !== o, since o isn't dry, so gets wrapped wet again.
-  assertEquals(3, (w.r = {a: 3}).a)
-  assertEquals(3, w.r.a)
-  assertEquals(3, o.r.a)
-  w.h(3)
-  assertEquals(3, w.q)
-  assertEquals(3, o.q)
-  assertEquals(4, (new w.h(4)).q)
-  assertEquals(5, w.s(5).x.y)
-  assertSame(o, receiver)
-
-  var wb = w.b
-  var wr = w.r
-  var wf = w.f
-  var wf3 = w.f(3)
-  var wfx = w.f({a: 6})
-  var wgx = w.g({a: {aa: 7}})
-  var wh4 = new w.h(4)
-  var ws5 = w.s(5)
-  var ws5x = ws5.x
-  m.gate.revoke()
-  assertEquals(3, wf3)
-  assertThrows(function() { w.a }, Error)
-  assertThrows(function() { w.r }, Error)
-  assertThrows(function() { w.r = {a: 4} }, Error)
-  assertThrows(function() { o.r.a }, Error)
-  assertEquals("object", typeof o.r)
-  assertEquals(5, (o.r = {a: 5}).a)
-  assertEquals(5, o.r.a)
-  assertThrows(function() { w[1] }, Error)
-  assertThrows(function() { w.c }, Error)
-  assertThrows(function() { wb.bb }, Error)
-  assertEquals(3, wr.a)
-  assertThrows(function() { wf(4) }, Error)
-  assertEquals(6, wfx.a)
-  assertEquals(7, wgx.aa)
-  assertThrows(function() { wh4.q }, Error)
-  assertThrows(function() { ws5.x }, Error)
-  assertThrows(function() { ws5x.y }, Error)
-}