7327a28ccc
As mentioned on Discord earlier, we'll add these to all new functions going forward - this is the backfill. Reasons: - It makes you look at the spec, implementing based on MDN or V8 behavior is a no-go - It makes finding the various functions that are non-compliant easier, in the future everything should either have such a comment or, if it's not from the spec at all, a comment explaining why that is the case - It makes it easier to check whether a certain abstract operation is implemented in LibJS, not all of them use the same name as the spec. E.g. RejectPromise() is Promise::reject() - It makes it easier to reason about vm.arguments(), e.g. when the function has a rest parameter - It makes it easier to see whether a certain function is from a proposal or Annex B Also: - Add arguments to all functions and abstract operations that already had a comment - Fix some outdated section numbers - Replace some ecma-international.org URLs with tc39.es
80 lines
2.4 KiB
C++
80 lines
2.4 KiB
C++
/*
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* Copyright (c) 2020, Linus Groh <linusg@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <AK/String.h>
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#include <LibCrypto/BigInt/SignedBigInteger.h>
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#include <LibJS/Runtime/BigIntConstructor.h>
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#include <LibJS/Runtime/BigIntObject.h>
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#include <LibJS/Runtime/Error.h>
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#include <LibJS/Runtime/GlobalObject.h>
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#include <LibJS/Runtime/VM.h>
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namespace JS {
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BigIntConstructor::BigIntConstructor(GlobalObject& global_object)
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: NativeFunction(vm().names.BigInt, *global_object.function_prototype())
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{
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}
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void BigIntConstructor::initialize(GlobalObject& global_object)
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{
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auto& vm = this->vm();
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NativeFunction::initialize(global_object);
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// 21.2.2.3 BigInt.prototype, https://tc39.es/ecma262/#sec-bigint.prototype
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define_property(vm.names.prototype, global_object.bigint_prototype(), 0);
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define_property(vm.names.length, Value(1), Attribute::Configurable);
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// TODO: Implement these functions below and uncomment this.
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// u8 attr = Attribute::Writable | Attribute::Configurable;
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// define_native_function(vm.names.asIntN, as_int_n, 2, attr);
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// define_native_function(vm.names.asUintN, as_uint_n, 2, attr);
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}
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BigIntConstructor::~BigIntConstructor()
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{
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}
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// 21.2.1.1 BigInt ( value ), https://tc39.es/ecma262/#sec-bigint-constructor-number-value
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Value BigIntConstructor::call()
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{
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auto primitive = vm().argument(0).to_primitive(global_object(), Value::PreferredType::Number);
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if (vm().exception())
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return {};
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if (primitive.is_number()) {
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if (!primitive.is_integer()) {
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vm().throw_exception<RangeError>(global_object(), ErrorType::BigIntIntArgument);
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return {};
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}
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return js_bigint(heap(), Crypto::SignedBigInteger { primitive.as_i32() });
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}
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auto* bigint = vm().argument(0).to_bigint(global_object());
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if (vm().exception())
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return {};
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return bigint;
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}
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// 21.2.1.1 BigInt ( value ), https://tc39.es/ecma262/#sec-bigint-constructor-number-value
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Value BigIntConstructor::construct(Function&)
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{
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vm().throw_exception<TypeError>(global_object(), ErrorType::NotAConstructor, "BigInt");
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return {};
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}
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// 21.2.2.1 BigInt.asIntN ( bits, bigint ), https://tc39.es/ecma262/#sec-bigint.asintn
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JS_DEFINE_NATIVE_FUNCTION(BigIntConstructor::as_int_n)
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{
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TODO();
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}
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// 21.2.2.2 BigInt.asUintN ( bits, bigint ), https://tc39.es/ecma262/#sec-bigint.asuintn
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JS_DEFINE_NATIVE_FUNCTION(BigIntConstructor::as_uint_n)
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{
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TODO();
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}
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}
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