| // This file was procedurally generated from the following sources: |
| // - src/dstr-binding/ary-ptrn-elem-obj-prop-id.case |
| // - src/dstr-binding/default/gen-func-decl.template |
| /*--- |
| description: BindingElement with object binding pattern and initializer is not used (generator function declaration) |
| esid: sec-generator-function-definitions-runtime-semantics-instantiatefunctionobject |
| features: [generators, destructuring-binding] |
| flags: [generated] |
| info: | |
| GeneratorDeclaration : function * ( FormalParameters ) { GeneratorBody } |
| |
| [...] |
| 2. Let F be GeneratorFunctionCreate(Normal, FormalParameters, |
| GeneratorBody, scope, strict). |
| [...] |
| |
| 9.2.1 [[Call]] ( thisArgument, argumentsList) |
| |
| [...] |
| 7. Let result be OrdinaryCallEvaluateBody(F, argumentsList). |
| [...] |
| |
| 9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList ) |
| |
| 1. Let status be FunctionDeclarationInstantiation(F, argumentsList). |
| [...] |
| |
| 9.2.12 FunctionDeclarationInstantiation(func, argumentsList) |
| |
| [...] |
| 23. Let iteratorRecord be Record {[[iterator]]: |
| CreateListIterator(argumentsList), [[done]]: false}. |
| 24. If hasDuplicates is true, then |
| [...] |
| 25. Else, |
| b. Let formalStatus be IteratorBindingInitialization for formals with |
| iteratorRecord and env as arguments. |
| [...] |
| |
| 13.3.3.6 Runtime Semantics: IteratorBindingInitialization |
| |
| BindingElement : BindingPatternInitializer opt |
| |
| [...] |
| 2. If iteratorRecord.[[done]] is true, let v be undefined. |
| 3. If Initializer is present and v is undefined, then |
| a. Let defaultValue be the result of evaluating Initializer. |
| b. Let v be ? GetValue(defaultValue). |
| 4. Return the result of performing BindingInitialization of BindingPattern |
| with v and environment as the arguments. |
| ---*/ |
| |
| var callCount = 0; |
| function* f([{ u: v, w: x, y: z } = { u: 444, w: 555, y: 666 }]) { |
| assert.sameValue(v, 777); |
| assert.sameValue(x, 888); |
| assert.sameValue(z, 999); |
| |
| assert.throws(ReferenceError, function() { |
| u; |
| }); |
| assert.throws(ReferenceError, function() { |
| w; |
| }); |
| assert.throws(ReferenceError, function() { |
| y; |
| }); |
| callCount = callCount + 1; |
| }; |
| f([{ u: 777, w: 888, y: 999 }]).next(); |
| assert.sameValue(callCount, 1, 'generator function invoked exactly once'); |