Implement logical assignment operators (#4834)
JerryScript-DCO-1.0-Signed-off-by: Robert Fancsik robert.fancsik@h-lab.eu
This commit is contained in:
Robert Fancsik
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// Copyright JS Foundation and other contributors, http://js.foundation
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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function testLogicalOr(truish, falsish, value) {
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let a = truish;
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a ||= value;
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expectSame(a, truish);
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a = falsish;
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a ||= value;
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expectSame(a, value);
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a = {
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a: truish
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};
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a.a ||= value
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expectSame(a.a, truish);
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a = {
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a: falsish
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};
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a.a ||= value;
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expectSame(a.a, value);
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let called = false;
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let setter = function (_) {
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called = true
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};
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a = Object.defineProperty({}, "a", {
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set: setter
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});
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let obj = {
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a: value
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}
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a ||= obj;
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expectSame(called, false);
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expectSame(Object.getOwnPropertyDescriptor(a, "a").set, setter);
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a = falsish;
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a ||= function () {};
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expectSame(typeof a, 'function');
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expectSame(a.name, 'a');
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a = falsish;
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a ||= class {};
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expectSame(typeof a, 'function');
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expectSame(a.name, 'a');
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const b = truish;
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b ||= value;
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expectSame(b, truish);
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expectSame(this.b, undefined);
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this.b ||= value;
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expectSame(this.b, value);
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}
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function testLogicalAnd(truish, falsish, value) {
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let a = falsish;
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a &&= value;
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expectSame(a, falsish);
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a = truish;
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a &&= value;
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expectSame(a, value);
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a = {
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a: falsish
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};
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a.a &&= value
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expectSame(a.a, falsish);
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a = {
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a: truish
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};
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a.a &&= value;
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expectSame(a.a, value);
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let called = false;
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let setter = function (_) {
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called = true
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};
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a = Object.defineProperty({}, "a", {
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set: setter
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});
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let obj = {
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a: value
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};
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a &&= obj;
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expectSame(called, false);
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expectSame(Object.getOwnPropertyDescriptor(a, "a").value, obj.a);
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a = truish;
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a &&= function () {};
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expectSame(typeof a, 'function');
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expectSame(a.name, 'a');
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a = truish;
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a &&= class {};
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expectSame(typeof a, 'function');
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expectSame(a.name, 'a');
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const b = falsish;
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b &&= value;
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expectSame(b, falsish);
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expectSame(this.b, undefined);
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this.b &&= value;
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expectSame(this.b, undefined);
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}
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function testNullish(truish, falsish, value) {
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let a = falsish;
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a ??= value;
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expectSame(a, value);
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a = truish;
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a ??= value;
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expectSame(a, truish);
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a = {
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a: falsish
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};
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a.a ??= value
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expectSame(a.a, value);
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a = {
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a: truish
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};
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a.a ??= value;
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expectSame(a.a, truish);
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let called = false;
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let setter = function (_) {
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called = true
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};
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a = Object.defineProperty({}, "a", {
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set: setter
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});
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let obj = {
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a: value
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};
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a ??= obj;
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expectSame(called, false);
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expectSame(Object.getOwnPropertyDescriptor(a, "a").set, setter);
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a = falsish;
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a ??= function () {};
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expectSame(typeof a, 'function');
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expectSame(a.name, 'a');
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a = falsish;
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a ??= class {};
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expectSame(typeof a, 'function');
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expectSame(a.name, 'a');
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const b = truish;
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b ??= value;
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expectSame(b, truish);
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expectSame(this.b, undefined);
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this.b ??= value;
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expectSame(this.b, value);
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}
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const nullishValues = [undefined, null];
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const logicalTrueValues = [1.1, Infinity, 1n, true, "foo", {}, Symbol()];
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const logicalFalseValues = [0, 0.0, NaN, 0n, false, "", ...nullishValues];
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const allValues = [...logicalTrueValues, ...logicalFalseValues];
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function testValues(cb, falseValues) {
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for (const truish of logicalTrueValues) {
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for (const falsish of falseValues) {
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for (const value of allValues) {
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cb.call({}, truish, falsish, value);
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}
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}
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}
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}
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function expectSame(x, value) {
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if (typeof x === 'number' && isNaN(x)) {
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assert(typeof value === 'number');
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assert(isNaN(value));
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} else {
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assert(x === value);
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}
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}
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testValues(testLogicalOr, logicalFalseValues);
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testValues(testLogicalAnd, logicalFalseValues);
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testValues(testNullish, nullishValues);
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function expectTypeError(str) {
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try {
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eval(str);
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assert(false);
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} catch (e) {
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assert(e instanceof TypeError);
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}
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}
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expectTypeError("const c = 0; c ||= 8");
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expectTypeError("const c = 1; c &&= 8");
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expectTypeError("const c = undefined; c ??= 8");
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@@ -1821,57 +1821,6 @@
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<test id="built-ins/WeakRef/prototype/deref/this-does-not-have-internal-target-throws.js"><reason></reason></test>
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<!-- END - ESNext stage 4 proposal: WeakRefs -->
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<!-- ESNext stage 4 proposal: Logical Assignment Operators
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features: [logical-assignment-operators]
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https://github.com/tc39/proposal-logical-assignment
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-->
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<test id="language/expressions/logical-assignment/lgcl-and-assignment-operator-bigint.js"><reason></reason></test>
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<test id="language/expressions/logical-assignment/lgcl-and-assignment-operator-lhs-before-rhs.js"><reason></reason></test>
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<test id="language/expressions/logical-assignment/lgcl-and-assignment-operator-namedevaluation-arrow-function.js"><reason></reason></test>
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<test id="language/expressions/logical-assignment/lgcl-and-assignment-operator-namedevaluation-class-expression.js"><reason></reason></test>
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<test id="language/expressions/logical-assignment/lgcl-and-assignment-operator-namedevaluation-function.js"><reason></reason></test>
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<test id="language/expressions/logical-assignment/lgcl-and-assignment-operator-no-set-put.js"><reason></reason></test>
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<test id="language/expressions/logical-assignment/lgcl-and-assignment-operator-no-set.js"><reason></reason></test>
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<test id="language/expressions/logical-assignment/lgcl-and-assignment-operator-non-extensible.js"><reason></reason></test>
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<test id="language/expressions/logical-assignment/lgcl-and-assignment-operator-non-writeable-put.js"><reason></reason></test>
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<test id="language/expressions/logical-assignment/lgcl-and-assignment-operator-non-writeable.js"><reason></reason></test>
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<test id="language/expressions/logical-assignment/lgcl-and-assignment-operator-unresolved-lhs.js"><reason></reason></test>
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<test id="language/expressions/logical-assignment/lgcl-and-assignment-operator-unresolved-rhs-put.js"><reason></reason></test>
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<test id="language/expressions/logical-assignment/lgcl-and-assignment-operator-unresolved-rhs.js"><reason></reason></test>
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<test id="language/expressions/logical-assignment/lgcl-and-assignment-operator.js"><reason></reason></test>
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<test id="language/expressions/logical-assignment/lgcl-and-whitespace.js"><reason></reason></test>
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<test id="language/expressions/logical-assignment/lgcl-nullish-assignment-operator-bigint.js"><reason></reason></test>
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<test id="language/expressions/logical-assignment/lgcl-nullish-assignment-operator-lhs-before-rhs.js"><reason></reason></test>
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<test id="language/expressions/logical-assignment/lgcl-nullish-assignment-operator-namedevaluation-arrow-function.js"><reason></reason></test>
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<test id="language/expressions/logical-assignment/lgcl-nullish-assignment-operator-namedevaluation-class-expression.js"><reason></reason></test>
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<test id="language/expressions/logical-assignment/lgcl-nullish-assignment-operator-namedevaluation-function.js"><reason></reason></test>
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<test id="language/expressions/logical-assignment/lgcl-nullish-assignment-operator-no-set-put.js"><reason></reason></test>
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<test id="language/expressions/logical-assignment/lgcl-nullish-assignment-operator-no-set.js"><reason></reason></test>
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<test id="language/expressions/logical-assignment/lgcl-nullish-assignment-operator-non-extensible.js"><reason></reason></test>
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<test id="language/expressions/logical-assignment/lgcl-nullish-assignment-operator-non-writeable-put.js"><reason></reason></test>
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<test id="language/expressions/logical-assignment/lgcl-nullish-assignment-operator-non-writeable.js"><reason></reason></test>
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<test id="language/expressions/logical-assignment/lgcl-nullish-assignment-operator-unresolved-lhs.js"><reason></reason></test>
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<test id="language/expressions/logical-assignment/lgcl-nullish-assignment-operator-unresolved-rhs-put.js"><reason></reason></test>
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<test id="language/expressions/logical-assignment/lgcl-nullish-assignment-operator-unresolved-rhs.js"><reason></reason></test>
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<test id="language/expressions/logical-assignment/lgcl-nullish-assignment-operator.js"><reason></reason></test>
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<test id="language/expressions/logical-assignment/lgcl-nullish-whitespace.js"><reason></reason></test>
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<test id="language/expressions/logical-assignment/lgcl-or-assignment-operator-bigint.js"><reason></reason></test>
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<test id="language/expressions/logical-assignment/lgcl-or-assignment-operator-lhs-before-rhs.js"><reason></reason></test>
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<test id="language/expressions/logical-assignment/lgcl-or-assignment-operator-namedevaluation-arrow-function.js"><reason></reason></test>
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<test id="language/expressions/logical-assignment/lgcl-or-assignment-operator-namedevaluation-class-expression.js"><reason></reason></test>
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<test id="language/expressions/logical-assignment/lgcl-or-assignment-operator-namedevaluation-function.js"><reason></reason></test>
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<test id="language/expressions/logical-assignment/lgcl-or-assignment-operator-no-set-put.js"><reason></reason></test>
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<test id="language/expressions/logical-assignment/lgcl-or-assignment-operator-no-set.js"><reason></reason></test>
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<test id="language/expressions/logical-assignment/lgcl-or-assignment-operator-non-extensible.js"><reason></reason></test>
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<test id="language/expressions/logical-assignment/lgcl-or-assignment-operator-non-writeable-put.js"><reason></reason></test>
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<test id="language/expressions/logical-assignment/lgcl-or-assignment-operator-non-writeable.js"><reason></reason></test>
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<test id="language/expressions/logical-assignment/lgcl-or-assignment-operator-unresolved-lhs.js"><reason></reason></test>
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<test id="language/expressions/logical-assignment/lgcl-or-assignment-operator-unresolved-rhs-put.js"><reason></reason></test>
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<test id="language/expressions/logical-assignment/lgcl-or-assignment-operator-unresolved-rhs.js"><reason></reason></test>
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<test id="language/expressions/logical-assignment/lgcl-or-assignment-operator.js"><reason></reason></test>
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<test id="language/expressions/logical-assignment/lgcl-or-whitespace.js"><reason></reason></test>
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<!-- END - ESNext stage 4 proposal: Logical Assignment Operators -->
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<!-- ES2015: Proper Tail Call (PTC) Optimization
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features: [tail-call-optimization]
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-->
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