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9e80c67608
By having the "is this a use strict directive?" logic in
parse_string_literal() we would apply it to *any* string literal, which
is incorrect and would lead to false positives - e.g.:
"use strict" + 1
`"use strict"`
"\123"; ({"use strict": ...})
Relevant part from the spec which is now implemented properly:
[...] and where each ExpressionStatement in the sequence consists
entirely of a StringLiteral token [...]
I also got rid of UseStrictDirectiveState which is not needed anymore.
Fixes #3903.
60 lines
1.2 KiB
JavaScript
60 lines
1.2 KiB
JavaScript
test("valid 'use strict; directive", () => {
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expect(
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(() => {
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"use strict";
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return isStrictMode();
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})()
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).toBeTrue();
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expect(
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(() => {
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'use strict';
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return isStrictMode();
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})()
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).toBeTrue();
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});
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test("invalid 'use strict; directive", () => {
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expect(
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(() => {
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" use strict ";
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return isStrictMode();
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})()
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).toBeFalse();
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expect(
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(() => {
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`use strict`;
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return isStrictMode();
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})()
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).toBeFalse();
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expect(
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(() => {
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"use\
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strict";
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return isStrictMode();
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})()
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).toBeFalse();
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expect(
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(() => {
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"use\ strict";
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return isStrictMode();
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})()
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).toBeFalse();
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expect(
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(() => {
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"use \163trict";
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return isStrictMode();
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})()
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).toBeFalse();
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expect(
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(() => {
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`"use strict"`;
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return isStrictMode();
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})()
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).toBeFalse();
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expect(
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(() => {
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"use strict" + 1;
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return isStrictMode();
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})()
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).toBeFalse();
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});
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