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Diffstat (limited to '')
-rw-r--r-- | js/src/tests/test262/language/statements/for-of/dstr/const-ary-ptrn-elem-id-init-skipped.js | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/js/src/tests/test262/language/statements/for-of/dstr/const-ary-ptrn-elem-id-init-skipped.js b/js/src/tests/test262/language/statements/for-of/dstr/const-ary-ptrn-elem-id-init-skipped.js new file mode 100644 index 0000000000..287e32bcd7 --- /dev/null +++ b/js/src/tests/test262/language/statements/for-of/dstr/const-ary-ptrn-elem-id-init-skipped.js @@ -0,0 +1,67 @@ +// This file was procedurally generated from the following sources: +// - src/dstr-binding/ary-ptrn-elem-id-init-skipped.case +// - src/dstr-binding/default/for-of-const.template +/*--- +description: Destructuring initializer is not evaluated when value is not `undefined` (for-of statement) +esid: sec-for-in-and-for-of-statements-runtime-semantics-labelledevaluation +features: [destructuring-binding] +flags: [generated] +info: | + IterationStatement : + for ( ForDeclaration of AssignmentExpression ) Statement + + [...] + 3. Return ForIn/OfBodyEvaluation(ForDeclaration, Statement, keyResult, + lexicalBinding, labelSet). + + 13.7.5.13 Runtime Semantics: ForIn/OfBodyEvaluation + + [...] + 3. Let destructuring be IsDestructuring of lhs. + [...] + 5. Repeat + [...] + h. If destructuring is false, then + [...] + i. Else + i. If lhsKind is assignment, then + [...] + ii. Else if lhsKind is varBinding, then + [...] + iii. Else, + 1. Assert: lhsKind is lexicalBinding. + 2. Assert: lhs is a ForDeclaration. + 3. Let status be the result of performing BindingInitialization + for lhs passing nextValue and iterationEnv as arguments. + [...] + + 13.3.3.6 Runtime Semantics: IteratorBindingInitialization + + SingleNameBinding : BindingIdentifier Initializeropt + + [...] + 6. If Initializer is present and v is undefined, then + [...] + 7. If environment is undefined, return PutValue(lhs, v). + 8. Return InitializeReferencedBinding(lhs, v). +---*/ +var initCount = 0; +function counter() { + initCount += 1; +} + +var iterCount = 0; + +for (const [w = counter(), x = counter(), y = counter(), z = counter()] of [[null, 0, false, '']]) { + assert.sameValue(w, null); + assert.sameValue(x, 0); + assert.sameValue(y, false); + assert.sameValue(z, ''); + assert.sameValue(initCount, 0); + + iterCount += 1; +} + +assert.sameValue(iterCount, 1, 'iteration occurred as expected'); + +reportCompare(0, 0); |