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fa07fd9951
Extract the data needed by initialize_environment() from the AST at construction time, following the pattern already used by Script for global declaration instantiation. This pre-computes var declared names, lexical bindings (with function indices), functions to initialize (with SharedFunctionInstanceData), and the default export binding name.
72 lines
3.2 KiB
C++
72 lines
3.2 KiB
C++
/*
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* Copyright (c) 2021-2023, Andreas Kling <andreas@ladybird.org>
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* Copyright (c) 2022, David Tuin <davidot@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 <LibJS/CyclicModule.h>
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#include <LibJS/Export.h>
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#include <LibJS/Forward.h>
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#include <LibJS/Runtime/ExecutionContext.h>
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namespace JS {
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// 16.2.1.6 Source Text Module Records, https://tc39.es/ecma262/#sec-source-text-module-records
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class JS_API SourceTextModule final : public CyclicModule {
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GC_CELL(SourceTextModule, CyclicModule);
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GC_DECLARE_ALLOCATOR(SourceTextModule);
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public:
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virtual ~SourceTextModule() override;
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static Result<GC::Ref<SourceTextModule>, Vector<ParserError>> parse(StringView source_text, Realm&, StringView filename = {}, Script::HostDefined* host_defined = nullptr);
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Program const& parse_node() const { return *m_ecmascript_code; }
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virtual Vector<Utf16FlyString> get_exported_names(VM& vm, HashTable<Module const*>& export_star_set) override;
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virtual ResolvedBinding resolve_export(VM& vm, Utf16FlyString const& export_name, Vector<ResolvedBinding> resolve_set = {}) override;
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Object* import_meta() { return m_import_meta; }
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void set_import_meta(Badge<VM>, Object* import_meta) { m_import_meta = import_meta; }
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protected:
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virtual ThrowCompletionOr<void> initialize_environment(VM& vm) override;
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virtual ThrowCompletionOr<void> execute_module(VM& vm, GC::Ptr<PromiseCapability> capability) override;
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private:
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SourceTextModule(Realm&, StringView filename, Script::HostDefined* host_defined, bool has_top_level_await, NonnullRefPtr<Program> body, Vector<ModuleRequest> requested_modules, Vector<ImportEntry> import_entries, Vector<ExportEntry> local_export_entries, Vector<ExportEntry> indirect_export_entries, Vector<ExportEntry> star_export_entries, RefPtr<ExportStatement const> default_export);
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virtual void visit_edges(Cell::Visitor&) override;
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NonnullRefPtr<Program> m_ecmascript_code; // [[ECMAScriptCode]]
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NonnullOwnPtr<ExecutionContext> m_execution_context; // [[Context]]
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GC::Ptr<Object> m_import_meta; // [[ImportMeta]]
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Vector<ImportEntry> m_import_entries; // [[ImportEntries]]
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Vector<ExportEntry> m_local_export_entries; // [[LocalExportEntries]]
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Vector<ExportEntry> m_indirect_export_entries; // [[IndirectExportEntries]]
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Vector<ExportEntry> m_star_export_entries; // [[StarExportEntries]]
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RefPtr<ExportStatement const> m_default_export; // Note: Not from the spec
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// Pre-computed module declaration instantiation data.
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// These are extracted from the AST at construction time so that
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// initialize_environment() can run without walking the AST.
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struct FunctionToInitialize {
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GC::Ref<SharedFunctionInstanceData> shared_data;
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Utf16FlyString name;
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};
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struct LexicalBinding {
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Utf16FlyString name;
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bool is_constant { false };
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i32 function_index { -1 }; // index into m_functions_to_initialize, -1 if not a function
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};
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Vector<Utf16FlyString> m_var_declared_names;
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Vector<LexicalBinding> m_lexical_bindings;
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Vector<FunctionToInitialize> m_functions_to_initialize;
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Optional<Utf16FlyString> m_default_export_binding_name;
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};
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}
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