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If USING_AK_GLOBALLY is not defined, the name IsLvalueReference might not be available in the global namespace. Follow the pattern established in LibTest to fully qualify AK types in macros to avoid this problem.
92 lines
6.4 KiB
C++
92 lines
6.4 KiB
C++
/*
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* Copyright (c) 2021-2022, Linus Groh <linusg@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/Forward.h>
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#include <LibJS/Forward.h>
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#include <LibJS/Runtime/AbstractOperations.h>
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namespace JS {
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// 27.2.1.1 PromiseCapability Records, https://tc39.es/ecma262/#sec-promisecapability-records
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class PromiseCapability final : public Cell {
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JS_CELL(PromiseCapability, Cell);
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public:
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static NonnullGCPtr<PromiseCapability> create(VM& vm, GCPtr<Object> promise, GCPtr<FunctionObject> resolve, GCPtr<FunctionObject> reject);
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virtual ~PromiseCapability() = default;
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[[nodiscard]] GCPtr<Object> promise() const { return m_promise; }
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void set_promise(NonnullGCPtr<Object> promise) { m_promise = promise; }
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[[nodiscard]] GCPtr<FunctionObject> resolve() const { return m_resolve; }
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void set_resolve(NonnullGCPtr<FunctionObject> resolve) { m_resolve = resolve; }
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[[nodiscard]] GCPtr<FunctionObject> reject() const { return m_reject; }
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void set_reject(NonnullGCPtr<FunctionObject> reject) { m_reject = reject; }
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private:
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PromiseCapability(GCPtr<Object>, GCPtr<FunctionObject>, GCPtr<FunctionObject>);
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virtual void visit_edges(Visitor&) override;
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GCPtr<Object> m_promise;
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GCPtr<FunctionObject> m_resolve;
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GCPtr<FunctionObject> m_reject;
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};
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// 27.2.1.1.1 IfAbruptRejectPromise ( value, capability ), https://tc39.es/ecma262/#sec-ifabruptrejectpromise
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#define __TRY_OR_REJECT(vm, capability, expression, CALL_CHECK) \
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({ \
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auto _temporary_try_or_reject_result = (expression); \
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/* 1. If value is an abrupt completion, then */ \
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if (_temporary_try_or_reject_result.is_error()) { \
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/* a. Perform ? Call(capability.[[Reject]], undefined, « value.[[Value]] »). */ \
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CALL_CHECK(JS::call(vm, *(capability)->reject(), js_undefined(), *_temporary_try_or_reject_result.release_error().value())); \
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\
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/* b. Return capability.[[Promise]]. */ \
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return (capability)->promise(); \
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} \
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\
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static_assert(!::AK::Detail::IsLvalueReference<decltype(_temporary_try_or_reject_result.release_value())>, \
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"Do not return a reference from a fallible expression"); \
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\
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/* 2. Else if value is a Completion Record, set value to value.[[Value]]. */ \
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_temporary_try_or_reject_result.release_value(); \
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})
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#define TRY_OR_REJECT(vm, capability, expression) \
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__TRY_OR_REJECT(vm, capability, expression, TRY)
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#define TRY_OR_MUST_REJECT(vm, capability, expression) \
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__TRY_OR_REJECT(vm, capability, expression, MUST)
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// 27.2.1.1.1 IfAbruptRejectPromise ( value, capability ), https://tc39.es/ecma262/#sec-ifabruptrejectpromise
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#define TRY_OR_REJECT_WITH_VALUE(vm, capability, expression) \
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({ \
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auto _temporary_try_or_reject_result = (expression); \
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/* 1. If value is an abrupt completion, then */ \
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if (_temporary_try_or_reject_result.is_error()) { \
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/* a. Perform ? Call(capability.[[Reject]], undefined, « value.[[Value]] »). */ \
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TRY(JS::call(vm, *(capability)->reject(), js_undefined(), *_temporary_try_or_reject_result.release_error().value())); \
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\
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/* b. Return capability.[[Promise]]. */ \
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return Value { (capability)->promise() }; \
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} \
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\
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static_assert(!::AK::Detail::IsLvalueReference<decltype(_temporary_try_or_reject_result.release_value())>, \
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"Do not return a reference from a fallible expression"); \
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\
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/* 2. Else if value is a Completion Record, set value to value.[[Value]]. */ \
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_temporary_try_or_reject_result.release_value(); \
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})
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// 27.2.1.5 NewPromiseCapability ( C ), https://tc39.es/ecma262/#sec-newpromisecapability
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ThrowCompletionOr<NonnullGCPtr<PromiseCapability>> new_promise_capability(VM& vm, Value constructor);
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}
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