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/*
* Copyright (c) 2021-2022, Linus Groh <linusg@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/StringView.h>
#include <LibJS/Runtime/GlobalObject.h>
#include <LibJS/Runtime/JobCallback.h>
#include <LibJS/Runtime/VM.h>
namespace JS {
// 27.2.1.1 PromiseCapability Records, https://tc39.es/ecma262/#sec-promisecapability-records
struct PromiseCapability {
Object* promise { nullptr };
FunctionObject* resolve { nullptr };
FunctionObject* reject { nullptr };
};
// 27.2.1.1.1 IfAbruptRejectPromise ( value, capability ), https://tc39.es/ecma262/#sec-ifabruptrejectpromise
#define __TRY_OR_REJECT(global_object, capability, expression, CALL_CHECK) \
({ \
auto _temporary_try_or_reject_result = (expression); \
/* 1. If value is an abrupt completion, then */ \
if (_temporary_try_or_reject_result.is_error()) { \
/* a. Perform ? Call(capability.[[Reject]], undefined, « value.[[Value]] »). */ \
CALL_CHECK(JS::call(global_object, *capability.reject, js_undefined(), *_temporary_try_or_reject_result.release_error().value())); \
\
/* b. Return capability.[[Promise]]. */ \
return capability.promise; \
} \
\
/* 2. Else if value is a Completion Record, set value to value.[[Value]]. */ \
_temporary_try_or_reject_result.release_value(); \
})
#define TRY_OR_REJECT(global_object, capability, expression) \
__TRY_OR_REJECT(global_object, capability, expression, TRY)
#define TRY_OR_MUST_REJECT(global_object, capability, expression) \
__TRY_OR_REJECT(global_object, capability, expression, MUST)
// 27.2.1.1.1 IfAbruptRejectPromise ( value, capability ), https://tc39.es/ecma262/#sec-ifabruptrejectpromise
#define TRY_OR_REJECT_WITH_VALUE(global_object, capability, expression) \
({ \
auto _temporary_try_or_reject_result = (expression); \
/* 1. If value is an abrupt completion, then */ \
if (_temporary_try_or_reject_result.is_error()) { \
/* a. Perform ? Call(capability.[[Reject]], undefined, « value.[[Value]] »). */ \
TRY(JS::call(global_object, *capability.reject, js_undefined(), *_temporary_try_or_reject_result.release_error().value())); \
\
/* b. Return capability.[[Promise]]. */ \
return Value { capability.promise }; \
} \
\
/* 2. Else if value is a Completion Record, set value to value.[[Value]]. */ \
_temporary_try_or_reject_result.release_value(); \
})
// 27.2.1.5 NewPromiseCapability ( C ), https://tc39.es/ecma262/#sec-newpromisecapability
ThrowCompletionOr<PromiseCapability> new_promise_capability(GlobalObject& global_object, Value constructor);
// 27.2.1.2 PromiseReaction Records, https://tc39.es/ecma262/#sec-promisereaction-records
class PromiseReaction final : public Cell {
public:
enum class Type {
Fulfill,
Reject,
};
static PromiseReaction* create(VM& vm, Type type, Optional<PromiseCapability> capability, Optional<JobCallback> handler)
{
return vm.heap().allocate_without_global_object<PromiseReaction>(type, capability, move(handler));
}
PromiseReaction(Type type, Optional<PromiseCapability> capability, Optional<JobCallback> handler);
virtual ~PromiseReaction() = default;
Type type() const { return m_type; }
Optional<PromiseCapability> const& capability() const { return m_capability; }
Optional<JobCallback>& handler() { return m_handler; }
Optional<JobCallback> const& handler() const { return m_handler; }
private:
virtual StringView class_name() const override { return "PromiseReaction"sv; }
virtual void visit_edges(Visitor&) override;
Type m_type;
Optional<PromiseCapability> m_capability;
Optional<JobCallback> m_handler;
};
}
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