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/*
* Copyright (c) 2022, David Tuin <davidot@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <LibJS/Forward.h>
#include <LibJS/Module.h>
#include <LibJS/Parser.h>
namespace JS {
enum class ModuleStatus {
Unlinked,
Linking,
Linked,
Evaluating,
EvaluatingAsync,
Evaluated
};
// 16.2.1.5 Cyclic Module Records, https://tc39.es/ecma262/#sec-cyclic-module-records
class CyclicModule : public Module {
JS_CELL(CyclicModule, Module);
public:
// Note: Do not call these methods directly unless you are HostResolveImportedModule.
// Badges cannot be used because other hosts must be able to call this (and it is called recursively)
virtual ThrowCompletionOr<void> link(VM& vm) override;
virtual ThrowCompletionOr<Promise*> evaluate(VM& vm) override;
Vector<ModuleRequest> const& requested_modules() const { return m_requested_modules; }
protected:
CyclicModule(Realm& realm, StringView filename, bool has_top_level_await, Vector<ModuleRequest> requested_modules, Script::HostDefined* host_defined);
virtual void visit_edges(Cell::Visitor&) override;
virtual ThrowCompletionOr<u32> inner_module_linking(VM& vm, Vector<Module*>& stack, u32 index) override;
virtual ThrowCompletionOr<u32> inner_module_evaluation(VM& vm, Vector<Module*>& stack, u32 index) override;
virtual ThrowCompletionOr<void> initialize_environment(VM& vm);
virtual ThrowCompletionOr<void> execute_module(VM& vm, GCPtr<PromiseCapability> capability = {});
void execute_async_module(VM& vm);
void gather_available_ancestors(Vector<CyclicModule*>& exec_list);
void async_module_execution_fulfilled(VM& vm);
void async_module_execution_rejected(VM& vm, Value error);
ModuleStatus m_status { ModuleStatus::Unlinked }; // [[Status]]
ThrowCompletionOr<void> m_evaluation_error; // [[EvaluationError]]
Optional<u32> m_dfs_index; // [[DFSIndex]]
Optional<u32> m_dfs_ancestor_index; // [[DFSAncestorIndex]]
Vector<ModuleRequest> m_requested_modules; // [[RequestedModules]]
CyclicModule* m_cycle_root { nullptr }; // [[CycleRoot]]
bool m_has_top_level_await { false }; // [[HasTLA]]
bool m_async_evaluation { false }; // [[AsyncEvaluation]]
GCPtr<PromiseCapability> m_top_level_capability; // [[TopLevelCapability]]
Vector<CyclicModule*> m_async_parent_modules; // [[AsyncParentModules]]
Optional<u32> m_pending_async_dependencies; // [[PendingAsyncDependencies]]
};
}
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