llvm/clang/include/clang/Frontend/FrontendAction.h

//===-- FrontendAction.h - Generic Frontend Action Interface ----*- 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
//
//===----------------------------------------------------------------------===//
///
/// \file
/// Defines the clang::FrontendAction interface and various convenience
/// abstract classes (clang::ASTFrontendAction, clang::PluginASTAction,
/// clang::PreprocessorFrontendAction, and clang::WrapperFrontendAction)
/// derived from it.
///
//===----------------------------------------------------------------------===//

#ifndef LLVM_CLANG_FRONTEND_FRONTENDACTION_H
#define LLVM_CLANG_FRONTEND_FRONTENDACTION_H

#include "clang/AST/ASTConsumer.h"
#include "clang/Basic/LLVM.h"
#include "clang/Basic/LangOptions.h"
#include "clang/Frontend/ASTUnit.h"
#include "clang/Frontend/FrontendOptions.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/Support/Error.h"
#include <memory>
#include <string>
#include <vector>

namespace clang {
class ASTMergeAction;
class CompilerInstance;

/// Abstract base class for actions which can be performed by the frontend.
class FrontendAction { … };

/// Abstract base class to use for AST consumer-based frontend actions.
class ASTFrontendAction : public FrontendAction { … };

class PluginASTAction : public ASTFrontendAction { … };

/// Abstract base class to use for preprocessor-based frontend actions.
class PreprocessorFrontendAction : public FrontendAction { … };

/// A frontend action which simply wraps some other runtime-specified
/// frontend action.
///
/// Deriving from this class allows an action to inject custom logic around
/// some existing action's behavior. It implements every virtual method in
/// the FrontendAction interface by forwarding to the wrapped action.
class WrapperFrontendAction : public FrontendAction { … };

}  // end namespace clang

#endif