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LibJS: Disallow escape sequence/line continuation in use strict directive

Browse source 
https://tc39.es/ecma262/#sec-directive-prologues-and-the-use-strict-directive

A Use Strict Directive is an ExpressionStatement in a Directive Prologue
whose StringLiteral is either of the exact code point sequences
"use strict" or 'use strict'. A Use Strict Directive may not contain an
EscapeSequence or LineContinuation.
This commit is contained in:
Linus Groh 2020-10-24 13:50:59 +01:00 • committed by Andreas Kling
commit 2adcabb6b3
Notes: sideshowbarker 2024-07-19 01:46:26 +09:00
2 changed files with 53 additions and 4 deletions
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48
Libraries/LibJS/Tests/use-strict-directive.js Normal file
View file

@ -0,0 +1,48 @@
test("valid 'use strict; directive", () => {
expect(
(() => {
"use strict";
return isStrictMode();
})()
).toBeTrue();
expect(
(() => {
'use strict';
return isStrictMode();
})()
).toBeTrue();
});
test("invalid 'use strict; directive", () => {
expect(
(() => {
" use strict ";
return isStrictMode();
})()
).toBeFalse();
expect(
(() => {
`use strict`;
return isStrictMode();
})()
).toBeFalse();
expect(
(() => {
"use\
strict";
return isStrictMode();
})()
).toBeFalse();
expect(
(() => {
"use\ strict";
return isStrictMode();
})()
).toBeFalse();
expect(
(() => {
"use \163trict";
return isStrictMode();
})()
).toBeFalse();
});