diff options
author | Linus Groh <mail@linusgroh.de> | 2023-01-27 21:25:31 +0000 |
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committer | Linus Groh <mail@linusgroh.de> | 2023-01-28 00:41:18 +0000 |
commit | eefb73add229acf1467ee38b3c8837bda526f37d (patch) | |
tree | 3af688711f463f77e21eb28c70e625849702f45b /Userland/Libraries | |
parent | 039cd353f1dad9d3a567d5c2e34e3a2bfe44cf64 (diff) | |
download | serenity-eefb73add229acf1467ee38b3c8837bda526f37d.zip |
LibJS: Add spec comments to ArrayBufferConstructor
Diffstat (limited to 'Userland/Libraries')
-rw-r--r-- | Userland/Libraries/LibJS/Runtime/ArrayBufferConstructor.cpp | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/Userland/Libraries/LibJS/Runtime/ArrayBufferConstructor.cpp b/Userland/Libraries/LibJS/Runtime/ArrayBufferConstructor.cpp index 96e7b06e7c..f4b3ea0127 100644 --- a/Userland/Libraries/LibJS/Runtime/ArrayBufferConstructor.cpp +++ b/Userland/Libraries/LibJS/Runtime/ArrayBufferConstructor.cpp @@ -1,5 +1,5 @@ /* - * Copyright (c) 2020-2022, Linus Groh <linusg@serenityos.org> + * Copyright (c) 2020-2023, Linus Groh <linusg@serenityos.org> * * SPDX-License-Identifier: BSD-2-Clause */ @@ -40,6 +40,8 @@ void ArrayBufferConstructor::initialize(Realm& realm) ThrowCompletionOr<Value> ArrayBufferConstructor::call() { auto& vm = this->vm(); + + // 1. If NewTarget is undefined, throw a TypeError exception. return vm.throw_completion<TypeError>(ErrorType::ConstructorWithoutNew, vm.names.ArrayBuffer); } @@ -47,6 +49,8 @@ ThrowCompletionOr<Value> ArrayBufferConstructor::call() ThrowCompletionOr<NonnullGCPtr<Object>> ArrayBufferConstructor::construct(FunctionObject& new_target) { auto& vm = this->vm(); + + // 2. Let byteLength be ? ToIndex(length). auto byte_length_or_error = vm.argument(0).to_index(vm); if (byte_length_or_error.is_error()) { @@ -57,6 +61,8 @@ ThrowCompletionOr<NonnullGCPtr<Object>> ArrayBufferConstructor::construct(Functi } return error; } + + // 3. Return ? AllocateArrayBuffer(NewTarget, byteLength). return *TRY(allocate_array_buffer(vm, new_target, byte_length_or_error.release_value())); } @@ -64,18 +70,25 @@ ThrowCompletionOr<NonnullGCPtr<Object>> ArrayBufferConstructor::construct(Functi JS_DEFINE_NATIVE_FUNCTION(ArrayBufferConstructor::is_view) { auto arg = vm.argument(0); + + // 1. If arg is not an Object, return false. if (!arg.is_object()) return Value(false); + + // 2. If arg has a [[ViewedArrayBuffer]] internal slot, return true. if (arg.as_object().is_typed_array()) return Value(true); if (is<DataView>(arg.as_object())) return Value(true); + + // 3. Return false. return Value(false); } // 25.1.4.3 get ArrayBuffer [ @@species ], https://tc39.es/ecma262/#sec-get-arraybuffer-@@species JS_DEFINE_NATIVE_FUNCTION(ArrayBufferConstructor::symbol_species_getter) { + // 1. Return the this value. return vm.this_value(); } |