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+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * vim: set ts=8 sts=2 et sw=2 tw=80:
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef vm_ModuleBuilder_h
+#define vm_ModuleBuilder_h
+
+#include "mozilla/Attributes.h" // MOZ_STACK_CLASS
+
+#include "jstypes.h" // JS_PUBLIC_API
+#include "frontend/EitherParser.h" // js::frontend::EitherParser
+#include "frontend/ParserAtom.h" // js::frontend::TaggedParserAtomIndex
+#include "frontend/Stencil.h" // js::frontend::StencilModuleEntry
+#include "frontend/TaggedParserAtomIndexHasher.h" // frontend::TaggedParserAtomIndexHasher
+#include "js/GCVector.h" // JS::GCVector
+
+struct JS_PUBLIC_API JSContext;
+class JS_PUBLIC_API JSAtom;
+
+namespace js {
+
+namespace frontend {
+
+class BinaryNode;
+class ListNode;
+class ParseNode;
+
+} // namespace frontend
+
+// Process a module's parse tree to collate the import and export data used when
+// creating a ModuleObject.
+class MOZ_STACK_CLASS ModuleBuilder {
+ explicit ModuleBuilder(FrontendContext* fc,
+ const frontend::EitherParser& eitherParser);
+
+ public:
+ template <class Parser>
+ explicit ModuleBuilder(FrontendContext* fc, Parser* parser)
+ : ModuleBuilder(fc, frontend::EitherParser(parser)) {}
+
+ bool processImport(frontend::BinaryNode* importNode);
+ bool processExport(frontend::ParseNode* exportNode);
+ bool processExportFrom(frontend::BinaryNode* exportNode);
+
+ bool hasExportedName(frontend::TaggedParserAtomIndex name) const;
+
+ bool buildTables(frontend::StencilModuleMetadata& metadata);
+
+ // During BytecodeEmitter we note top-level functions, and afterwards we must
+ // call finishFunctionDecls on the list.
+ bool noteFunctionDeclaration(FrontendContext* fc, uint32_t funIndex);
+ void finishFunctionDecls(frontend::StencilModuleMetadata& metadata);
+
+ void noteAsync(frontend::StencilModuleMetadata& metadata);
+
+ private:
+ using MaybeModuleRequestIndex = frontend::MaybeModuleRequestIndex;
+ using ModuleRequestVector = frontend::StencilModuleMetadata::RequestVector;
+ using RequestedModuleVector = frontend::StencilModuleMetadata::EntryVector;
+
+ using AtomSet = HashSet<frontend::TaggedParserAtomIndex,
+ frontend::TaggedParserAtomIndexHasher>;
+ using ExportEntryVector = Vector<frontend::StencilModuleEntry>;
+ using ImportEntryMap =
+ HashMap<frontend::TaggedParserAtomIndex, frontend::StencilModuleEntry,
+ frontend::TaggedParserAtomIndexHasher>;
+
+ FrontendContext* fc_;
+ frontend::EitherParser eitherParser_;
+
+ // These are populated while parsing.
+ ModuleRequestVector moduleRequests_;
+ AtomSet requestedModuleSpecifiers_;
+ RequestedModuleVector requestedModules_;
+ ImportEntryMap importEntries_;
+ ExportEntryVector exportEntries_;
+ AtomSet exportNames_;
+
+ // These are populated while emitting bytecode.
+ FunctionDeclarationVector functionDecls_;
+
+ frontend::StencilModuleEntry* importEntryFor(
+ frontend::TaggedParserAtomIndex localName) const;
+
+ bool processExportBinding(frontend::ParseNode* binding);
+ bool processExportArrayBinding(frontend::ListNode* array);
+ bool processExportObjectBinding(frontend::ListNode* obj);
+
+ MaybeModuleRequestIndex appendModuleRequest(
+ frontend::TaggedParserAtomIndex specifier,
+ frontend::ListNode* assertionList);
+
+ bool appendExportEntry(frontend::TaggedParserAtomIndex exportName,
+ frontend::TaggedParserAtomIndex localName,
+ frontend::ParseNode* node = nullptr);
+
+ bool maybeAppendRequestedModule(MaybeModuleRequestIndex moduleRequest,
+ frontend::ParseNode* node);
+
+ void markUsedByStencil(frontend::TaggedParserAtomIndex name);
+
+ [[nodiscard]] bool processAssertions(frontend::StencilModuleRequest& request,
+ frontend::ListNode* assertionList);
+
+ [[nodiscard]] bool isAssertionSupported(frontend::TaggedParserAtomIndex key);
+};
+
+template <typename T>
+ArrayObject* CreateArray(JSContext* cx,
+ const JS::Rooted<JS::GCVector<T>>& vector);
+
+} // namespace js
+
+#endif // vm_ModuleBuilder_h