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serenity/Userland/Libraries/LibJS/Runtime/PromiseReaction.h
davidot f568939568 LibJS: Implement the import assertions proposal
The hard part of parsing them in import statements and calls was already
done so this is just removing some check which threw before on
assertions. And filtering the assertions based on the result of a new
host hook.
2022-01-30 17:40:20 +00:00

92 lines
6.2 KiB
C++

/*
* Copyright (c) 2021, Linus Groh <linusg@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#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) \
({ \
auto _temporary_try_or_reject_result = (expression); \
/* 1. If value is an abrupt completion, then */ \
if (_temporary_try_or_reject_result.is_error()) { \
global_object.vm().clear_exception(); \
\
/* 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 capability.promise; \
} \
\
/* 2. Else if value is a Completion Record, set value to value.[[Value]]. */ \
_temporary_try_or_reject_result.release_value(); \
})
// 27.2.1.1.1 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()) { \
global_object.vm().clear_exception(); \
\
/* 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, handler);
}
PromiseReaction(Type type, Optional<PromiseCapability> capability, Optional<JobCallback> handler);
virtual ~PromiseReaction() = default;
Type type() const { return m_type; }
const Optional<PromiseCapability>& capability() const { return m_capability; }
const Optional<JobCallback>& handler() const { return m_handler; }
private:
virtual const char* class_name() const override { return "PromiseReaction"; }
virtual void visit_edges(Visitor&) override;
Type m_type;
Optional<PromiseCapability> m_capability;
Optional<JobCallback> m_handler;
};
}