ladybird/Userland/Libraries/LibJS/Runtime/ErrorConstructor.cpp
Linus Groh 5832de62fe LibJS: Convert NativeFunction::{call,construct}() to ThrowCompletionOr
Both at the same time because many of them call construct() in call()
and I'm not keen on adding a bunch of temporary plumbing to turn
exceptions into throw completions.
Also changes the return value of construct() to Object* instead of Value
as it always needs to return an object; allowing an arbitrary Value is a
massive foot gun.
2021-10-21 09:02:23 +01:00

102 lines
6.5 KiB
C++

/*
* Copyright (c) 2020-2021, Linus Groh <linusg@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibJS/Runtime/AbstractOperations.h>
#include <LibJS/Runtime/Error.h>
#include <LibJS/Runtime/ErrorConstructor.h>
#include <LibJS/Runtime/GlobalObject.h>
namespace JS {
ErrorConstructor::ErrorConstructor(GlobalObject& global_object)
: NativeFunction(vm().names.Error.as_string(), *global_object.function_prototype())
{
}
void ErrorConstructor::initialize(GlobalObject& global_object)
{
auto& vm = this->vm();
NativeFunction::initialize(global_object);
// 20.5.2.1 Error.prototype, https://tc39.es/ecma262/#sec-error.prototype
define_direct_property(vm.names.prototype, global_object.error_prototype(), 0);
define_direct_property(vm.names.length, Value(1), Attribute::Configurable);
}
// 20.5.1.1 Error ( message ), https://tc39.es/ecma262/#sec-error-message
ThrowCompletionOr<Value> ErrorConstructor::call()
{
return TRY(construct(*this));
}
// 20.5.1.1 Error ( message ), https://tc39.es/ecma262/#sec-error-message
ThrowCompletionOr<Object*> ErrorConstructor::construct(FunctionObject& new_target)
{
auto& vm = this->vm();
auto& global_object = this->global_object();
auto* error = TRY(ordinary_create_from_constructor<Error>(global_object, new_target, &GlobalObject::error_prototype));
if (!vm.argument(0).is_undefined()) {
auto message = TRY(vm.argument(0).to_string(global_object));
MUST(error->create_non_enumerable_data_property_or_throw(vm.names.message, js_string(vm, message)));
}
TRY(error->install_error_cause(vm.argument(1)));
return error;
}
#define __JS_ENUMERATE(ClassName, snake_name, PrototypeName, ConstructorName, ArrayType) \
ConstructorName::ConstructorName(GlobalObject& global_object) \
: NativeFunction(*static_cast<Object*>(global_object.error_constructor())) \
{ \
} \
\
void ConstructorName::initialize(GlobalObject& global_object) \
{ \
auto& vm = this->vm(); \
NativeFunction::initialize(global_object); \
\
/* 20.5.6.2.1 NativeError.prototype, \
https://tc39.es/ecma262/#sec-nativeerror.prototype */ \
define_direct_property(vm.names.prototype, global_object.snake_name##_prototype(), 0); \
\
define_direct_property(vm.names.length, Value(1), Attribute::Configurable); \
} \
\
ConstructorName::~ConstructorName() { } \
\
/* 20.5.6.1.1 NativeError ( message ), https://tc39.es/ecma262/#sec-nativeerror */ \
ThrowCompletionOr<Value> ConstructorName::call() \
{ \
return TRY(construct(*this)); \
} \
\
/* 20.5.6.1.1 NativeError ( message ), https://tc39.es/ecma262/#sec-nativeerror */ \
ThrowCompletionOr<Object*> ConstructorName::construct(FunctionObject& new_target) \
{ \
auto& vm = this->vm(); \
auto& global_object = this->global_object(); \
\
auto* error = TRY(ordinary_create_from_constructor<ClassName>( \
global_object, new_target, &GlobalObject::snake_name##_prototype)); \
\
if (!vm.argument(0).is_undefined()) { \
auto message = TRY(vm.argument(0).to_string(global_object)); \
MUST(error->create_non_enumerable_data_property_or_throw(vm.names.message, js_string(vm, message))); \
} \
\
TRY(error->install_error_cause(vm.argument(1))); \
\
return error; \
}
JS_ENUMERATE_NATIVE_ERRORS
#undef __JS_ENUMERATE
}