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LibJS: Implement Module linking and evaluating

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davidot 2022-01-18 19:29:17 +01:00 • committed by Linus Groh
parent be9d478d92
commit 1b8ccf9a66
9 changed files with 1569 additions and 22 deletions
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45
Userland/Libraries/LibJS/SourceTextModule.h
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@ -1,5 +1,6 @@
/*
* Copyright (c) 2021, Andreas Kling <kling@serenityos.org>
* Copyright (c) 2022, David Tuin <davidot@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
@ -7,24 +8,56 @@
#pragma once
#include <LibJS/AST.h>
#include <LibJS/CyclicModule.h>
#include <LibJS/Forward.h>
#include <LibJS/Module.h>
#include <LibJS/Parser.h>
namespace JS {
// 16.2.1.6 Source Text Module Records, https://tc39.es/ecma262/#sec-source-text-module-records
class SourceTextModule final : public Module {
class SourceTextModule final : public CyclicModule {
public:
using ImportEntry = ImportStatement::ImportEntry;
using ExportEntry = ExportStatement::ExportEntry;
static Result<NonnullRefPtr<SourceTextModule>, Vector<Parser::Error>> parse(StringView source_text, Realm&, StringView filename = {});
virtual ~SourceTextModule();
Program const& parse_node() const { return *m_ecmascript_code; }
private:
explicit SourceTextModule(Realm&, StringView filename, NonnullRefPtr<Program>);
virtual ThrowCompletionOr<Vector<FlyString>> get_exported_names(VM& vm, Vector<Module*> export_star_set) override;
virtual ThrowCompletionOr<ResolvedBinding> resolve_export(VM& vm, FlyString const& export_name, Vector<ResolvedBinding> resolve_set = {}) override;
NonnullRefPtr<Program> m_ecmascript_code; // [[ECMAScriptCode]]
Object* import_meta()
{
if (m_import_meta.is_null())
return nullptr;
return m_import_meta.cell();
}
void set_import_meta(Badge<MetaProperty>, Object* import_meta)
{
m_import_meta = make_handle(import_meta);
}
protected:
virtual Completion initialize_environment(VM& vm) override;
virtual Completion execute_module(VM& vm, Optional<PromiseCapability> capability) override;
private:
SourceTextModule(Realm&, StringView filename, bool has_top_level_await, NonnullRefPtr<Program> body, Vector<FlyString> requested_modules,
Vector<ImportEntry> import_entries, Vector<ExportEntry> local_export_entries,
Vector<ExportEntry> indirect_export_entries, Vector<ExportEntry> star_export_entries,
RefPtr<ExportStatement> default_export);
NonnullRefPtr<Program> m_ecmascript_code; // [[ECMAScriptCode]]
ExecutionContext m_execution_context; // [[Context]]
Handle<Object> m_import_meta; // [[ImportMeta]]
Vector<ImportEntry> m_import_entries; // [[ImportEntries]]
Vector<ExportEntry> m_local_export_entries; // [[LocalExportEntries]]
Vector<ExportEntry> m_indirect_export_entries; // [[IndirectExportEntries]]
Vector<ExportEntry> m_star_export_entries; // [[StarExportEntries]]
RefPtr<ExportStatement> m_default_export; // Note: Not from the spec
};
}