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LibJS: Fix cases where we incorrectly allowed 'in' in for loops

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We needed to propagate the forbidden token set to all parsing functions
that can call back into parse_expression.
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Anonymous 2022-02-15 02:11:56 -08:00 • committed by Linus Groh
parent 5da3063a39
commit f55d7bf6f3
3 changed files with 69 additions and 50 deletions
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19
Userland/Libraries/LibJS/Tests/syntax/for-loop-invalid-in.js Normal file
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@ -0,0 +1,19 @@
test("The use of the 'in' keyword is restricted in for loop headers", () => {
expect("for (a ? a : a in a; false; ) ;").not.toEval();
expect("for (a + a in b);").not.toEval();
expect("for (a in a of a);").not.toEval();
expect("for(a = a in a; false;);").not.toEval();
expect("for(a += a in a; false;);").not.toEval();
expect("for(a -= a in a; false;);").not.toEval();
expect("for(a *= a in a; false;);").not.toEval();
expect("for(a /= a in a; false;);").not.toEval();
expect("for(a &= a in a; false;);").not.toEval();
expect("for(a |= a in a; false;);").not.toEval();
expect("for(a ^= a in a; false;);").not.toEval();
expect("for(a ^^= a in a; false;);").not.toEval();
expect("for(a == a in a; false;);").not.toEval();
expect("for(a != a in a; false;);").not.toEval();
expect("for(a === a in a; false;);").not.toEval();
expect("for(a !== a in a; false;);").not.toEval();
expect("for (a ?? b in c;;);").not.toEval();
});