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/*
* Copyright (C) 2015 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef ModuleRecord_h
#define ModuleRecord_h
#include "Nodes.h"
#include <wtf/HashMap.h>
#include <wtf/ListHashSet.h>
namespace JSC {
// Based on the Source Text Module Record
// http://www.ecma-international.org/ecma-262/6.0/#sec-source-text-module-records
class ModuleRecord : public RefCounted<ModuleRecord> {
public:
struct ExportEntry {
enum class Type {
Local,
Namespace,
Indirect
};
static ExportEntry createLocal(const Identifier& exportName, const Identifier& localName, const VariableEnvironmentEntry&);
static ExportEntry createNamespace(const Identifier& exportName, const Identifier& moduleName);
static ExportEntry createIndirect(const Identifier& exportName, const Identifier& importName, const Identifier& moduleName);
Type type;
Identifier exportName;
Identifier moduleName;
Identifier importName;
Identifier localName;
VariableEnvironmentEntry variable;
};
struct ImportEntry {
Identifier moduleRequest;
Identifier importName;
Identifier localName;
bool isNamespace(VM& vm) const
{
return importName == vm.propertyNames->timesIdentifier;
}
};
typedef WTF::ListHashSet<RefPtr<UniquedStringImpl>, IdentifierRepHash> OrderedIdentifierSet;
typedef HashMap<RefPtr<UniquedStringImpl>, ImportEntry, IdentifierRepHash, HashTraits<RefPtr<UniquedStringImpl>>> ImportMap;
typedef HashMap<RefPtr<UniquedStringImpl>, ExportEntry, IdentifierRepHash, HashTraits<RefPtr<UniquedStringImpl>>> ExportMap;
static Ref<ModuleRecord> create()
{
return adoptRef(*new ModuleRecord);
}
void appendRequestedModule(const Identifier&);
void addStarExportEntry(const Identifier&);
void addImportEntry(const ImportEntry&);
void addExportEntry(const ExportEntry&);
const ImportEntry& lookUpImportEntry(const RefPtr<UniquedStringImpl>& localName);
void dump();
private:
// Map localName -> ImportEntry.
ImportMap m_importEntries;
// Map exportName -> ExportEntry.
ExportMap m_exportEntries;
IdentifierSet m_starExportEntries;
// Save the occurrence order since the module loader loads and runs the modules in this order.
// http://www.ecma-international.org/ecma-262/6.0/#sec-moduleevaluation
OrderedIdentifierSet m_requestedModules;
};
inline void ModuleRecord::appendRequestedModule(const Identifier& moduleName)
{
m_requestedModules.add(moduleName.impl());
}
inline void ModuleRecord::addImportEntry(const ImportEntry& entry)
{
m_importEntries.add(entry.localName.impl(), entry);
}
inline void ModuleRecord::addExportEntry(const ExportEntry& entry)
{
m_exportEntries.add(entry.exportName.impl(), entry);
}
inline void ModuleRecord::addStarExportEntry(const Identifier& moduleName)
{
m_starExportEntries.add(moduleName.impl());
}
inline auto ModuleRecord::lookUpImportEntry(const RefPtr<UniquedStringImpl>& localName) -> const ImportEntry&
{
return (*m_importEntries.find(localName)).value;
}
} // namespace JSC
#endif // ModuleRecord_h
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