mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2024-09-20 17:58:18 +03:00
426e32e5c0
This is copied from JS::ThrowCompletionOr and will allow using them interchangeably with types wrapped by JS::Value such as JS::Object*.
128 lines
3.4 KiB
C++
128 lines
3.4 KiB
C++
/*
|
|
* Copyright (c) 2021-2022, Linus Groh <linusg@serenityos.org>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <AK/NonnullRefPtr.h>
|
|
#include <AK/Optional.h>
|
|
#include <AK/RefPtr.h>
|
|
#include <LibJS/Runtime/Completion.h>
|
|
#include <LibWeb/WebIDL/DOMException.h>
|
|
|
|
namespace Web::WebIDL {
|
|
|
|
#define ENUMERATE_SIMPLE_WEBIDL_EXCEPTION_TYPES(E) \
|
|
E(EvalError) \
|
|
E(RangeError) \
|
|
E(ReferenceError) \
|
|
E(TypeError) \
|
|
E(URIError)
|
|
|
|
#define E(x) x,
|
|
enum class SimpleExceptionType {
|
|
ENUMERATE_SIMPLE_WEBIDL_EXCEPTION_TYPES(E)
|
|
};
|
|
#undef E
|
|
|
|
struct SimpleException {
|
|
SimpleExceptionType type;
|
|
String message;
|
|
};
|
|
|
|
template<typename ValueType>
|
|
class ExceptionOr {
|
|
public:
|
|
ExceptionOr() requires(IsSame<ValueType, Empty>)
|
|
: m_result(Empty {})
|
|
{
|
|
}
|
|
|
|
ExceptionOr(ValueType const& result)
|
|
: m_result(result)
|
|
{
|
|
}
|
|
|
|
ExceptionOr(ValueType&& result)
|
|
: m_result(move(result))
|
|
{
|
|
}
|
|
|
|
// Allows implicit construction of ExceptionOr<T> from a type U if T(U) is a supported constructor.
|
|
// Most commonly: Value from Object* or similar, so we can omit the curly braces from "return { TRY(...) };".
|
|
// Disabled for POD types to avoid weird conversion shenanigans.
|
|
template<typename WrappedValueType>
|
|
ExceptionOr(WrappedValueType result) requires(!IsPOD<ValueType>)
|
|
: m_result(move(result))
|
|
{
|
|
}
|
|
|
|
ExceptionOr(JS::NonnullGCPtr<DOMException> exception)
|
|
: m_exception(move(exception))
|
|
{
|
|
}
|
|
|
|
ExceptionOr(SimpleException exception)
|
|
: m_exception(move(exception))
|
|
{
|
|
}
|
|
|
|
ExceptionOr(JS::Completion exception)
|
|
: m_exception(move(exception))
|
|
{
|
|
auto const& completion = m_exception.get<JS::Completion>();
|
|
VERIFY(completion.is_error());
|
|
}
|
|
|
|
ExceptionOr(Variant<SimpleException, JS::NonnullGCPtr<DOMException>, JS::Completion> exception)
|
|
: m_exception(move(exception).template downcast<Empty, SimpleException, JS::NonnullGCPtr<DOMException>, JS::Completion>())
|
|
{
|
|
if (auto* completion = m_exception.template get_pointer<JS::Completion>())
|
|
VERIFY(completion->is_error());
|
|
}
|
|
|
|
ExceptionOr(ExceptionOr&& other) = default;
|
|
ExceptionOr(ExceptionOr const& other) = default;
|
|
~ExceptionOr() = default;
|
|
|
|
ValueType& value() requires(!IsSame<ValueType, Empty>)
|
|
{
|
|
return m_result.value();
|
|
}
|
|
|
|
ValueType release_value()
|
|
{
|
|
return m_result.release_value();
|
|
}
|
|
|
|
Variant<SimpleException, JS::NonnullGCPtr<DOMException>, JS::Completion> exception() const
|
|
{
|
|
return m_exception.template downcast<SimpleException, JS::NonnullGCPtr<DOMException>, JS::Completion>();
|
|
}
|
|
|
|
bool is_exception() const
|
|
{
|
|
return !m_exception.template has<Empty>();
|
|
}
|
|
|
|
// These are for compatibility with the TRY() macro in AK.
|
|
[[nodiscard]] bool is_error() const { return is_exception(); }
|
|
Variant<SimpleException, JS::NonnullGCPtr<DOMException>, JS::Completion> release_error() { return exception(); }
|
|
|
|
private:
|
|
Optional<ValueType> m_result;
|
|
|
|
// https://webidl.spec.whatwg.org/#idl-exceptions
|
|
Variant<Empty, SimpleException, JS::NonnullGCPtr<DOMException>, JS::Completion> m_exception {};
|
|
};
|
|
|
|
template<>
|
|
class ExceptionOr<void> : public ExceptionOr<Empty> {
|
|
public:
|
|
using ExceptionOr<Empty>::ExceptionOr;
|
|
};
|
|
|
|
}
|