// This file was procedurally generated from the following sources: // - src/dstr-binding/ary-ptrn-elem-id-init-skipped.case // - src/dstr-binding/default/func-decl-dflt.template /*--- description: Destructuring initializer is not evaluated when value is not `undefined` (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 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 callCount = 0; function f([w = counter(), x = counter(), y = counter(), z = counter()] = [null, 0, false, '']) { assert.sameValue(w, null); assert.sameValue(x, 0); assert.sameValue(y, false); assert.sameValue(z, ''); assert.sameValue(initCount, 0); callCount = callCount + 1; }; f(); assert.sameValue(callCount, 1, 'function invoked exactly once'); reportCompare(0, 0);