llvm/clang/include/clang/Lex/PPCallbacks.h

//===--- PPCallbacks.h - Callbacks for Preprocessor actions -----*- 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 PPCallbacks interface.
///
//===----------------------------------------------------------------------===//

#ifndef LLVM_CLANG_LEX_PPCALLBACKS_H
#define LLVM_CLANG_LEX_PPCALLBACKS_H

#include "clang/Basic/DiagnosticIDs.h"
#include "clang/Basic/SourceLocation.h"
#include "clang/Basic/SourceManager.h"
#include "clang/Lex/ModuleLoader.h"
#include "clang/Lex/Pragma.h"
#include "llvm/ADT/StringRef.h"

namespace clang {
class Token;
class IdentifierInfo;
class MacroDefinition;
class MacroDirective;
class MacroArgs;
struct LexEmbedParametersResult;

/// This interface provides a way to observe the actions of the
/// preprocessor as it does its thing.
///
/// Clients can define their hooks here to implement preprocessor level tools.
class PPCallbacks { … };

/// Simple wrapper class for chaining callbacks.
class PPChainedCallbacks : public PPCallbacks { … };

}  // end namespace clang

#endif