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async-gen-meth-ary-ptrn-rest-id-iter-step-err.js (2638B)

      1 // This file was procedurally generated from the following sources:
      2 // - src/dstr-binding/ary-ptrn-rest-id-iter-step-err.case
      3 // - src/dstr-binding/error/cls-expr-async-gen-meth.template
      4 /*---
      5 description: Error forwarding when IteratorStep returns an abrupt completion (class expression method)
      6 esid: sec-class-definitions-runtime-semantics-evaluation
      7 features: [generators, async-iteration]
      8 flags: [generated]
      9 info: |
     10    ClassExpression : class BindingIdentifieropt ClassTail
     11 
     12    1. If BindingIdentifieropt is not present, let className be undefined.
     13    2. Else, let className be StringValue of BindingIdentifier.
     14    3. Let value be the result of ClassDefinitionEvaluation of ClassTail
     15       with argument className.
     16    [...]
     17 
     18    14.5.14 Runtime Semantics: ClassDefinitionEvaluation
     19 
     20    21. For each ClassElement m in order from methods
     21        a. If IsStatic of m is false, then
     22           i. Let status be the result of performing
     23              PropertyDefinitionEvaluation for m with arguments proto and
     24              false.
     25        [...]
     26 
     27    Runtime Semantics: PropertyDefinitionEvaluation
     28 
     29    AsyncGeneratorMethod :
     30        async [no LineTerminator here] * PropertyName ( UniqueFormalParameters )
     31            { AsyncGeneratorBody }
     32 
     33    1. Let propKey be the result of evaluating PropertyName.
     34    2. ReturnIfAbrupt(propKey).
     35    3. If the function code for this AsyncGeneratorMethod is strict mode code, let strict be true.
     36       Otherwise let strict be false.
     37    4. Let scope be the running execution context's LexicalEnvironment.
     38    5. Let closure be ! AsyncGeneratorFunctionCreate(Method, UniqueFormalParameters,
     39       AsyncGeneratorBody, scope, strict).
     40    [...]
     41 
     42    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
     43    BindingRestElement : ... BindingIdentifier
     44    1. Let lhs be ResolveBinding(StringValue of BindingIdentifier,
     45       environment).
     46    2. ReturnIfAbrupt(lhs). 3. Let A be ArrayCreate(0). 4. Let n=0. 5. Repeat,
     47       a. If iteratorRecord.[[done]] is false,
     48          i. Let next be IteratorStep(iteratorRecord.[[iterator]]).
     49          ii. If next is an abrupt completion, set iteratorRecord.[[done]] to
     50              true.
     51          iii. ReturnIfAbrupt(next).
     52 
     53 ---*/
     54 var first = 0;
     55 var second = 0;
     56 var iter = function*() {
     57  first += 1;
     58  throw new Test262Error();
     59  second += 1;
     60 }();
     61 
     62 
     63 var C = class {
     64  async *method([...x]) {
     65    
     66  }
     67 };
     68 
     69 var method = C.prototype.method;
     70 
     71 assert.throws(Test262Error, function() {
     72  method(iter);
     73 });
     74 
     75 iter.next();
     76 assert.sameValue(first, 1);
     77 assert.sameValue(second, 0, 'Iterator is closed following abrupt completion.');
     78 
     79 reportCompare(0, 0);