// This file was procedurally generated from the following sources: // - src/dstr-binding/ary-ptrn-elem-ary-rest-init.case // - src/dstr-binding/default/func-decl-dflt.template /*--- description: BindingElement with array binding pattern and initializer is used (function declaration (default parameter)) esid: sec-function-definitions-runtime-semantics-instantiatefunctionobject features: [destructuring-binding, default-parameters] flags: [generated] info: | FunctionDeclaration : function BindingIdentifier ( FormalParameters ) { FunctionBody } [...] 3. Let F be FunctionCreate(Normal, FormalParameters, FunctionBody, 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 values = [2, 1, 3]; var callCount = 0; function f([[...x] = values] = []) { assert(Array.isArray(x)); assert.sameValue(x[0], 2); assert.sameValue(x[1], 1); assert.sameValue(x[2], 3); assert.sameValue(x.length, 3); assert.notSameValue(x, values); callCount = callCount + 1; }; f(); assert.sameValue(callCount, 1, 'function invoked exactly once'); reportCompare(0, 0);