Zoltan Herczeg
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
45 lines
1.6 KiB
JavaScript
45 lines
1.6 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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*/
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function check_syntax_error (code)
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{
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try {
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eval (code);
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assert (false);
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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 ("let a; let b; let a");
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check_syntax_error ("let a, b, a");
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check_syntax_error ("var a; let a;");
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check_syntax_error ("var a; const a = 3;");
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check_syntax_error ("let a; var a;");
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check_syntax_error ("const a = 3; var x, y, a;");
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check_syntax_error ("let a; { let b; { var a; } }");
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check_syntax_error ("{ { var a = 4; } }; let a = 3");
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check_syntax_error ("function a() {}; let a;");
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check_syntax_error ("let a; function a() {};");
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check_syntax_error ("{ { function a() {}; let a; } }");
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check_syntax_error ("{ { let a; function a() {}; } }");
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check_syntax_error ("let a = 1; const b = 5; const a = 2;");
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check_syntax_error ("try {} catch (e) { let e; }");
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check_syntax_error ("try {} catch (e) { const e = 1; }");
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check_syntax_error ("let A; class A {}");
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check_syntax_error ("const A; class A {}");
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check_syntax_error ("class A {}; let A");
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check_syntax_error ("class A {}; const A");
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