mirror of
https://github.com/LadybirdBrowser/ladybird
synced 2026-05-13 10:26:37 +02:00
277551c40f
Add shared helpers for estimating external string and container storage. Use them for symbols, bound function arguments, promise reactions, and promise combinator value lists.
79 lines
2.3 KiB
C++
79 lines
2.3 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/Vector.h>
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#include <LibJS/Export.h>
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#include <LibJS/Runtime/Object.h>
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namespace JS {
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ThrowCompletionOr<Object*> promise_resolve(VM&, Object& constructor, Value);
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class JS_API Promise : public Object {
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JS_OBJECT(Promise, Object);
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GC_DECLARE_ALLOCATOR(Promise);
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public:
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enum class State {
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Pending,
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Fulfilled,
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Rejected,
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};
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enum class RejectionOperation {
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Reject,
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Handle,
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};
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static GC::Ref<Promise> create(Realm&);
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virtual ~Promise() = default;
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State state() const { return m_state; }
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Value result() const { return m_result; }
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struct ResolvingFunctions {
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GC::Ref<FunctionObject> resolve;
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GC::Ref<FunctionObject> reject;
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};
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ResolvingFunctions create_resolving_functions();
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static Value resolve_function_steps(VM&, Promise&, bool& already_resolved);
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static Value reject_function_steps(VM&, Promise&, bool& already_resolved);
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void fulfill(Value value);
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void reject(Value reason);
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Value perform_then(Value on_fulfilled, Value on_rejected, GC::Ptr<PromiseCapability> result_capability);
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bool is_handled() const { return m_is_handled; }
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void set_is_handled() { m_is_handled = true; }
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protected:
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explicit Promise(Object& prototype);
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virtual void visit_edges(Visitor&) override;
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virtual size_t external_memory_size() const override;
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private:
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virtual bool is_promise() const override { return true; }
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bool is_settled() const { return m_state == State::Fulfilled || m_state == State::Rejected; }
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void trigger_reactions() const;
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// 27.2.6 Properties of Promise Instances, https://tc39.es/ecma262/#sec-properties-of-promise-instances
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State m_state { State::Pending }; // [[PromiseState]]
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bool m_is_handled { false }; // [[PromiseIsHandled]]
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Value m_result; // [[PromiseResult]]
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Vector<GC::Ptr<PromiseReaction>> m_fulfill_reactions; // [[PromiseFulfillReactions]]
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Vector<GC::Ptr<PromiseReaction>> m_reject_reactions; // [[PromiseRejectReactions]]
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};
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template<>
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inline bool Object::fast_is<Promise>() const { return is_promise(); }
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}
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