diff options
Diffstat (limited to 'deps/v8/test/mjsunit/harmony/proxies-example-membrane.js')
| -rw-r--r-- | deps/v8/test/mjsunit/harmony/proxies-example-membrane.js | 512 |
1 files changed, 0 insertions, 512 deletions
diff --git a/deps/v8/test/mjsunit/harmony/proxies-example-membrane.js b/deps/v8/test/mjsunit/harmony/proxies-example-membrane.js deleted file mode 100644 index 72ab092a88..0000000000 --- a/deps/v8/test/mjsunit/harmony/proxies-example-membrane.js +++ /dev/null @@ -1,512 +0,0 @@ -// 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 no-op handler. Adapted from: -// http://wiki.ecmascript.org/doku.php?id=harmony:proxies#examplea_no-op_forwarding_proxy - -function createHandler(obj) { - return { - getOwnPropertyDescriptor: function(name) { - var desc = Object.getOwnPropertyDescriptor(obj, name); - if (desc !== undefined) desc.configurable = true; - return desc; - }, - getPropertyDescriptor: function(name) { - var desc = Object.getOwnPropertyDescriptor(obj, name); - //var desc = Object.getPropertyDescriptor(obj, name); // not in ES5 - if (desc !== undefined) desc.configurable = true; - return desc; - }, - getOwnPropertyNames: function() { - return Object.getOwnPropertyNames(obj); - }, - getPropertyNames: function() { - return Object.getOwnPropertyNames(obj); - //return Object.getPropertyNames(obj); // not in ES5 - }, - defineProperty: function(name, desc) { - Object.defineProperty(obj, name, desc); - }, - delete: function(name) { - return delete obj[name]; - }, - fix: function() { - if (Object.isFrozen(obj)) { - var result = {}; - Object.getOwnPropertyNames(obj).forEach(function(name) { - result[name] = Object.getOwnPropertyDescriptor(obj, name); - }); - return result; - } - // As long as obj is not frozen, the proxy won't allow itself to be fixed - return undefined; // will cause a TypeError to be thrown - }, - has: function(name) { return name in obj; }, - hasOwn: function(name) { return ({}).hasOwnProperty.call(obj, name); }, - get: function(receiver, name) { return obj[name]; }, - set: function(receiver, name, val) { - obj[name] = val; // bad behavior when set fails in sloppy mode - return true; - }, - enumerate: function() { - var result = []; - for (var name in obj) { result.push(name); }; - return result; - }, - keys: function() { return Object.keys(obj); } - }; -} - - - -// Auxiliary definitions enabling tracking of object identity in output. - -var objectMap = new WeakMap; -var objectCounter = 0; - -function registerObject(x, s) { - if (x === Object(x) && !objectMap.has(x)) - objectMap.set(x, ++objectCounter + (s == undefined ? "" : ":" + s)); -} - -registerObject(this, "global"); -registerObject(Object.prototype, "Object.prototype"); - -function str(x) { - if (x === Object(x)) return "[" + typeof x + " " + objectMap.get(x) + "]"; - if (typeof x == "string") return "\"" + x + "\""; - return "" + x; -} - - - -// A simple membrane. Adapted from: -// http://wiki.ecmascript.org/doku.php?id=harmony:proxies#a_simple_membrane - -function createSimpleMembrane(target) { - var enabled = true; - - function wrap(obj) { - registerObject(obj); - print("wrap enter", str(obj)); - try { - var x = wrap2(obj); - registerObject(x, "wrapped"); - print("wrap exit", str(obj), "as", str(x)); - return x; - } catch(e) { - print("wrap exception", str(e)); - throw e; - } - } - - function wrap2(obj) { - if (obj !== Object(obj)) { - return obj; - } - - function wrapCall(fun, that, args) { - registerObject(that); - print("wrapCall enter", fun, str(that)); - try { - var x = wrapCall2(fun, that, args); - print("wrapCall exit", fun, str(that), "returning", str(x)); - return x; - } catch(e) { - print("wrapCall exception", fun, str(that), str(e)); - throw e; - } - } - - function wrapCall2(fun, that, args) { - if (!enabled) { throw new Error("disabled"); } - try { - return wrap(fun.apply(that, Array.prototype.map.call(args, wrap))); - } catch (e) { - throw wrap(e); - } - } - - var baseHandler = createHandler(obj); - var handler = new Proxy({}, Object.freeze({ - get: function(receiver, name) { - return function() { - var arg = (name === "get" || name == "set") ? arguments[1] : ""; - print("handler enter", name, arg); - var x = wrapCall(baseHandler[name], baseHandler, arguments); - print("handler exit", name, arg, "returning", str(x)); - return x; - } - } - })); - registerObject(baseHandler, "basehandler"); - registerObject(handler, "handler"); - - if (typeof obj === "function") { - function callTrap() { - print("call trap enter", str(obj), str(this)); - var x = wrapCall(obj, wrap(this), arguments); - print("call trap exit", str(obj), str(this), "returning", str(x)); - return x; - } - function constructTrap() { - if (!enabled) { throw new Error("disabled"); } - try { - function forward(args) { return obj.apply(this, args) } - return wrap(new forward(Array.prototype.map.call(arguments, wrap))); - } catch (e) { - throw wrap(e); - } - } - return Proxy.createFunction(handler, callTrap, constructTrap); - } else { - var prototype = wrap(Object.getPrototypeOf(obj)); - return new Proxy(prototype, handler); - } - } - - var gate = Object.freeze({ - enable: function() { enabled = true; }, - disable: function() { enabled = false; } - }); - - return Object.freeze({ - wrapper: wrap(target), - gate: gate - }); -} - - -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; -print("o =", str(o)) -print("w =", str(w)); - -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(wetTarget) { - var wet2dry = new WeakMap(); - var dry2wet = new WeakMap(); - - function asDry(obj) { - registerObject(obj) - print("asDry enter", str(obj)) - try { - var x = asDry2(obj); - registerObject(x, "dry"); - print("asDry exit", str(obj), "as", str(x)); - return x; - } catch(e) { - print("asDry exception", str(e)); - throw e; - } - } - function asDry2(wet) { - if (wet !== Object(wet)) { - // primitives provide only irrevocable knowledge, so don't - // bother wrapping it. - return wet; - } - var dryResult = wet2dry.get(wet); - if (dryResult) { return dryResult; } - - var wetHandler = createHandler(wet); - var dryRevokeHandler = new Proxy({}, Object.freeze({ - get: function(receiver, name) { - return function() { - var arg = (name === "get" || name == "set") ? arguments[1] : ""; - print("dry handler enter", name, arg); - var optWetHandler = dry2wet.get(dryRevokeHandler); - try { - var x = asDry(optWetHandler[name].apply( - optWetHandler, Array.prototype.map.call(arguments, asWet))); - print("dry handler exit", name, arg, "returning", str(x)); - return x; - } catch (eWet) { - var x = asDry(eWet); - print("dry handler exception", name, arg, "throwing", str(x)); - throw x; - } - }; - } - })); - dry2wet.set(dryRevokeHandler, wetHandler); - - if (typeof wet === "function") { - function callTrap() { - print("dry call trap enter", str(this)); - var x = asDry(wet.apply( - asWet(this), Array.prototype.map.call(arguments, asWet))); - print("dry call trap exit", str(this), "returning", str(x)); - return x; - } - function constructTrap() { - function forward(args) { return wet.apply(this, args) } - return asDry(new forward(Array.prototype.map.call(arguments, asWet))); - } - dryResult = - Proxy.createFunction(dryRevokeHandler, callTrap, constructTrap); - } else { - dryResult = - new Proxy(asDry(Object.getPrototypeOf(wet)), dryRevokeHandler); - } - wet2dry.set(wet, dryResult); - dry2wet.set(dryResult, wet); - return dryResult; - } - - function asWet(obj) { - registerObject(obj) - print("asWet enter", str(obj)) - try { - var x = asWet2(obj) - registerObject(x, "wet") - print("asWet exit", str(obj), "as", str(x)) - return x - } catch(e) { - print("asWet exception", str(e)) - throw e - } - } - function asWet2(dry) { - if (dry !== Object(dry)) { - // primitives provide only irrevocable knowledge, so don't - // bother wrapping it. - return dry; - } - var wetResult = dry2wet.get(dry); - if (wetResult) { return wetResult; } - - var dryHandler = createHandler(dry); - var wetRevokeHandler = new Proxy({}, Object.freeze({ - get: function(receiver, name) { - return function() { - var arg = (name === "get" || name == "set") ? arguments[1] : ""; - print("wet handler enter", name, arg); - var optDryHandler = wet2dry.get(wetRevokeHandler); - try { - var x = asWet(optDryHandler[name].apply( - optDryHandler, Array.prototype.map.call(arguments, asDry))); - print("wet handler exit", name, arg, "returning", str(x)); - return x; - } catch (eDry) { - var x = asWet(eDry); - print("wet handler exception", name, arg, "throwing", str(x)); - throw x; - } - }; - } - })); - wet2dry.set(wetRevokeHandler, dryHandler); - - if (typeof dry === "function") { - function callTrap() { - print("wet call trap enter", str(this)); - var x = asWet(dry.apply( - asDry(this), Array.prototype.map.call(arguments, asDry))); - print("wet call trap exit", str(this), "returning", str(x)); - return x; - } - function constructTrap() { - function forward(args) { return dry.apply(this, args) } - return asWet(new forward(Array.prototype.map.call(arguments, asDry))); - } - wetResult = - Proxy.createFunction(wetRevokeHandler, callTrap, constructTrap); - } else { - wetResult = - new Proxy(asWet(Object.getPrototypeOf(dry)), wetRevokeHandler); - } - dry2wet.set(dry, wetResult); - wet2dry.set(wetResult, dry); - return wetResult; - } - - var gate = Object.freeze({ - revoke: function() { - dry2wet = wet2dry = Object.freeze({ - get: function(key) { throw new Error("revoked"); }, - set: function(key, val) { throw new Error("revoked"); } - }); - } - }); - - return Object.freeze({ wrapper: asDry(wetTarget), gate: gate }); -} - - -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 -print("o =", str(o)) -print("w =", str(w)) - -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) |