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/*
* Copyright (c) 2021-2022, Linus Groh <linusg@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/Forward.h>
#include <LibJS/Forward.h>
#include <LibJS/Runtime/AbstractOperations.h>
namespace JS {
// 27.2.1.1 PromiseCapability Records, https://tc39.es/ecma262/#sec-promisecapability-records
class PromiseCapability final : public Cell {
JS_CELL(PromiseCapability, Cell);
public:
static NonnullGCPtr<PromiseCapability> create(VM& vm, GCPtr<Object> promise, GCPtr<FunctionObject> resolve, GCPtr<FunctionObject> reject);
virtual ~PromiseCapability() = default;
[[nodiscard]] GCPtr<Object> promise() const { return m_promise; }
void set_promise(NonnullGCPtr<Object> promise) { m_promise = promise; }
[[nodiscard]] GCPtr<FunctionObject> resolve() const { return m_resolve; }
void set_resolve(NonnullGCPtr<FunctionObject> resolve) { m_resolve = resolve; }
[[nodiscard]] GCPtr<FunctionObject> reject() const { return m_reject; }
void set_reject(NonnullGCPtr<FunctionObject> reject) { m_reject = reject; }
private:
PromiseCapability(GCPtr<Object>, GCPtr<FunctionObject>, GCPtr<FunctionObject>);
virtual void visit_edges(Visitor&) override;
GCPtr<Object> m_promise;
GCPtr<FunctionObject> m_resolve;
GCPtr<FunctionObject> m_reject;
};
// 27.2.1.1.1 IfAbruptRejectPromise ( value, capability ), https://tc39.es/ecma262/#sec-ifabruptrejectpromise
#define __TRY_OR_REJECT(vm, 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(vm, *(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(vm, capability, expression) \
__TRY_OR_REJECT(vm, capability, expression, TRY)
#define TRY_OR_MUST_REJECT(vm, capability, expression) \
__TRY_OR_REJECT(vm, capability, expression, MUST)
// 27.2.1.1.1 IfAbruptRejectPromise ( value, capability ), https://tc39.es/ecma262/#sec-ifabruptrejectpromise
#define TRY_OR_REJECT_WITH_VALUE(vm, 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(vm, *(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<NonnullGCPtr<PromiseCapability>> new_promise_capability(VM& vm, Value constructor);
}
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