llvm/clang/include/clang/Serialization/ModuleFileExtension.h

//===-- ModuleFileExtension.h - Module File Extensions ----------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_CLANG_SERIALIZATION_MODULEFILEEXTENSION_H
#define LLVM_CLANG_SERIALIZATION_MODULEFILEEXTENSION_H

#include "llvm/Support/ExtensibleRTTI.h"
#include "llvm/Support/HashBuilder.h"
#include "llvm/Support/MD5.h"
#include <memory>
#include <string>

namespace llvm {
class BitstreamCursor;
class BitstreamWriter;
class raw_ostream;
}

namespace clang {

class ASTReader;
class ASTWriter;
class Sema;

namespace serialization {
  class ModuleFile;
} // end namespace serialization

/// Metadata for a module file extension.
struct ModuleFileExtensionMetadata { … };

class ModuleFileExtensionReader;
class ModuleFileExtensionWriter;

/// An abstract superclass that describes a custom extension to the
/// module/precompiled header file format.
///
/// A module file extension can introduce additional information into
/// compiled module files (.pcm) and precompiled headers (.pch) via a
/// custom writer that can then be accessed via a custom reader when
/// the module file or precompiled header is loaded.
///
/// Subclasses must use LLVM RTTI for open class hierarchies.
class ModuleFileExtension
    : public llvm::RTTIExtends<ModuleFileExtension, llvm::RTTIRoot> { … };

/// Abstract base class that writes a module file extension block into
/// a module file.
class ModuleFileExtensionWriter { … };

/// Abstract base class that reads a module file extension block from
/// a module file.
///
/// Subclasses
class ModuleFileExtensionReader { … };

} // end namespace clang

#endif // LLVM_CLANG_SERIALIZATION_MODULEFILEEXTENSION_H