// Copyright 2019 the V8 project authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. #include 'src/builtins/builtins-typed-array-gen.h' namespace typed_array { const kBuiltinNameFindIndex: constexpr string = '%TypedArray%.prototype.findIndex'; transitioning macro FindIndexAllElements(implicit context: Context)( array: typed_array::AttachedJSTypedArray, predicate: Callable, thisArg: JSAny): Number { let witness = typed_array::NewAttachedJSTypedArrayWitness(array); const length: uintptr = witness.Get().length; // 6. Repeat, while k < len for (let k: uintptr = 0; k < length; k++) { // 6a. Let Pk be ! ToString(𝔽(k)). // There is no need to cast ToString to load elements. // 6b. Let kValue be ! Get(O, Pk). // kValue must be undefined when the buffer is detached. let value: JSAny; try { witness.Recheck() otherwise goto IsDetached; value = witness.Load(k); } label IsDetached deferred { value = Undefined; } // 6c. Let testResult be ! ToBoolean(? Call(predicate, thisArg, « kValue, // 𝔽(k), O »)). // TODO(v8:4153): Consider versioning this loop for Smi and non-Smi // indices to optimize Convert<Number>(k) for the most common case. const indexNumber: Number = Convert<Number>(k); const result = Call( context, predicate, thisArg, value, indexNumber, witness.GetStable()); if (ToBoolean(result)) { return indexNumber; } } return -1; } // https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.findIndex transitioning javascript builtin TypedArrayPrototypeFindIndex( js-implicit context: NativeContext, receiver: JSAny)(...arguments): JSAny { // arguments[0] = callback // arguments[1] = thisArg. try { const array: JSTypedArray = Cast<JSTypedArray>(receiver) otherwise NotTypedArray; const uarray = typed_array::EnsureAttached(array) otherwise IsDetached; const predicate = Cast<Callable>(arguments[0]) otherwise NotCallable; const thisArg = arguments[1]; return FindIndexAllElements(uarray, predicate, thisArg); } label NotCallable deferred { ThrowTypeError(MessageTemplate::kCalledNonCallable, arguments[0]); } label NotTypedArray deferred { ThrowTypeError(MessageTemplate::kNotTypedArray, kBuiltinNameFindIndex); } label IsDetached deferred { ThrowTypeError(MessageTemplate::kDetachedOperation, kBuiltinNameFindIndex); } } }