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https://github.com/RGBCube/serenity
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b84f8fb55b
Some of these are allocated upon initialization of the intrinsics, and some lazily, but in neither case the getters actually return a nullptr. This saves us a whole bunch of pointer dereferences (as NonnullGCPtr has an `operator T&()`), and also has the interesting side effect of forcing us to explicitly use the FunctionObject& overload of call(), as passing a NonnullGCPtr is ambigous - it could implicitly be turned into a Value _or_ a FunctionObject& (so we have to dereference manually).
124 lines
8.7 KiB
C++
124 lines
8.7 KiB
C++
/*
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* Copyright (c) 2020-2023, 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 <LibJS/Runtime/AbstractOperations.h>
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#include <LibJS/Runtime/Error.h>
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#include <LibJS/Runtime/ErrorConstructor.h>
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#include <LibJS/Runtime/GlobalObject.h>
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namespace JS {
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ErrorConstructor::ErrorConstructor(Realm& realm)
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: NativeFunction(realm.vm().names.Error.as_string(), realm.intrinsics().function_prototype())
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{
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}
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ThrowCompletionOr<void> ErrorConstructor::initialize(Realm& realm)
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{
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auto& vm = this->vm();
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MUST_OR_THROW_OOM(NativeFunction::initialize(realm));
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// 20.5.2.1 Error.prototype, https://tc39.es/ecma262/#sec-error.prototype
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define_direct_property(vm.names.prototype, realm.intrinsics().error_prototype(), 0);
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define_direct_property(vm.names.length, Value(1), Attribute::Configurable);
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return {};
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}
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// 20.5.1.1 Error ( message [ , options ] ), https://tc39.es/ecma262/#sec-error-message
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ThrowCompletionOr<Value> ErrorConstructor::call()
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{
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// 1. If NewTarget is undefined, let newTarget be the active function object; else let newTarget be NewTarget.
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return TRY(construct(*this));
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}
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// 20.5.1.1 Error ( message [ , options ] ), https://tc39.es/ecma262/#sec-error-message
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ThrowCompletionOr<NonnullGCPtr<Object>> ErrorConstructor::construct(FunctionObject& new_target)
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{
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auto& vm = this->vm();
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auto message = vm.argument(0);
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auto options = vm.argument(1);
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// 2. Let O be ? OrdinaryCreateFromConstructor(newTarget, "%Error.prototype%", « [[ErrorData]] »).
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auto error = TRY(ordinary_create_from_constructor<Error>(vm, new_target, &Intrinsics::error_prototype));
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// 3. If message is not undefined, then
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if (!message.is_undefined()) {
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// a. Let msg be ? ToString(message).
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auto msg = TRY(message.to_string(vm));
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// b. Perform CreateNonEnumerableDataPropertyOrThrow(O, "message", msg).
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error->create_non_enumerable_data_property_or_throw(vm.names.message, PrimitiveString::create(vm, move(msg)));
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}
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// 4. Perform ? InstallErrorCause(O, options).
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TRY(error->install_error_cause(options));
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// 5. Return O.
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return error;
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}
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#define __JS_ENUMERATE(ClassName, snake_name, PrototypeName, ConstructorName, ArrayType) \
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ConstructorName::ConstructorName(Realm& realm) \
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: NativeFunction(realm.vm().names.ClassName.as_string(), realm.intrinsics().error_constructor()) \
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{ \
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} \
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\
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ThrowCompletionOr<void> ConstructorName::initialize(Realm& realm) \
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{ \
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auto& vm = this->vm(); \
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MUST_OR_THROW_OOM(NativeFunction::initialize(realm)); \
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\
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/* 20.5.6.2.1 NativeError.prototype, https://tc39.es/ecma262/#sec-nativeerror.prototype */ \
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define_direct_property(vm.names.prototype, realm.intrinsics().snake_name##_prototype(), 0); \
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\
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define_direct_property(vm.names.length, Value(1), Attribute::Configurable); \
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\
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return {}; \
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} \
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\
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ConstructorName::~ConstructorName() = default; \
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\
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/* 20.5.6.1.1 NativeError ( message [ , options ] ), https://tc39.es/ecma262/#sec-nativeerror */ \
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ThrowCompletionOr<Value> ConstructorName::call() \
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{ \
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/* 1. If NewTarget is undefined, let newTarget be the active function object; else let newTarget be NewTarget. */ \
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return TRY(construct(*this)); \
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} \
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\
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/* 20.5.6.1.1 NativeError ( message [ , options ] ), https://tc39.es/ecma262/#sec-nativeerror */ \
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ThrowCompletionOr<NonnullGCPtr<Object>> ConstructorName::construct(FunctionObject& new_target) \
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{ \
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auto& vm = this->vm(); \
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\
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auto message = vm.argument(0); \
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auto options = vm.argument(1); \
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\
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/* 2. Let O be ? OrdinaryCreateFromConstructor(newTarget, "%NativeError.prototype%", « [[ErrorData]] »). */ \
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auto error = TRY(ordinary_create_from_constructor<ClassName>(vm, new_target, &Intrinsics::snake_name##_prototype)); \
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\
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/* 3. If message is not undefined, then */ \
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if (!message.is_undefined()) { \
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/* a. Let msg be ? ToString(message). */ \
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auto msg = TRY(message.to_string(vm)); \
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\
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/* b. Perform CreateNonEnumerableDataPropertyOrThrow(O, "message", msg). */ \
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error->create_non_enumerable_data_property_or_throw(vm.names.message, PrimitiveString::create(vm, move(msg))); \
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} \
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\
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/* 4. Perform ? InstallErrorCause(O, options). */ \
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TRY(error->install_error_cause(options)); \
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\
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/* 5. Return O. */ \
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return error; \
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}
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JS_ENUMERATE_NATIVE_ERRORS
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#undef __JS_ENUMERATE
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}
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