| // This file was procedurally generated from the following sources: |
| // - src/dstr-binding/ary-ptrn-rest-id-direct.case |
| // - src/dstr-binding/default/func-decl-dflt.template |
| /*--- |
| description: Lone rest element (direct binding) (function declaration (default parameter)) |
| esid: sec-function-definitions-runtime-semantics-instantiatefunctionobject |
| features: [destructuring-binding, default-parameters] |
| flags: [generated] |
| includes: [compareArray.js] |
| 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. |
| [...] |
| |
| Runtime Semantics: IteratorBindingInitialization |
| |
| BindingRestElement : ... BindingIdentifier |
| |
| [...] |
| 2. Let A be ! ArrayCreate(0). |
| 3. Let n be 0. |
| 4. Repeat, |
| [...] |
| f. Perform ! CreateDataPropertyOrThrow(A, ! ToString(n), nextValue). |
| g. Set n to n + 1. |
| |
| ---*/ |
| |
| var callCount = 0; |
| function f([...x] = [1]) { |
| assert(Array.isArray(x)); |
| assert.compareArray(x, [1]); |
| callCount = callCount + 1; |
| }; |
| f(); |
| assert.sameValue(callCount, 1, 'function invoked exactly once'); |