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https://github.com/jerryscript-project/jerryscript.git
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3d797b8836
This patch implements the core part of let/const statements. Redeclarations are correctly detected and separate contexts are correctly created for these statements. Register optimizations are also emplyed whenever possible. Lots of features are still missing: - checking the var statements in eval - const are treated as lets - single statement checks are missing - export declarations are exported as vars, let/const export is not supported JerryScript-DCO-1.0-Signed-off-by: Zoltan Herczeg zherczeg.u-szeged@partner.samsung.com
56 lines
1.4 KiB
JavaScript
56 lines
1.4 KiB
JavaScript
// 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 f() {
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return 'foo';
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}
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assert ((function() {
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if (1 === 1) {
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function f() {
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return 'bar';
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}
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}
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return f();
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})() === 'bar');
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function check_syntax_error (s) {
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try {
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eval (s);
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assert (false);
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}
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catch (e) {
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assert (e instanceof SyntaxError);
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}
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}
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check_syntax_error ("'use strict'; function arguments () {}");
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check_syntax_error ("'use strict'; var l = function arguments () {}");
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check_syntax_error ("function f__strict_mode_duplicate_parameters (p, p) { 'use strict'; }");
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function test_strict_mode_propagation_in_func_expr_and_getters_setters () {
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var p = function () {
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'use strict';
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return true;
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}
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var o = { get prop () { 'use strict'; return true; }, set prop (v) { 'use strict'; } };
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function test () {
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tmp_eval = eval;
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eval = tmp_eval;
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}
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}
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