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//===--- PPCallbacks.h - Callbacks for Preprocessor actions -----*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file was developed by Chris Lattner and is distributed under
// the University of Illinois Open Source License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file defines the PPCallbacks interface.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CLANG_LEX_PPCALLBACKS_H
#define LLVM_CLANG_LEX_PPCALLBACKS_H
#include "clang/Lex/DirectoryLookup.h"
#include "clang/Basic/SourceLocation.h"
#include <string>
namespace clang {
class SourceLocation;
/// PPCallbacks - 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 {
public:
virtual ~PPCallbacks();
enum FileChangeReason {
EnterFile, ExitFile, SystemHeaderPragma, RenameFile
};
/// FileChanged - This callback is invoked whenever a source file is
/// entered or exited. The SourceLocation indicates the new location, and
/// EnteringFile indicates whether this is because we are entering a new
/// #include'd file (when true) or whether we're exiting one because we ran
/// off the end (when false).
virtual void FileChanged(SourceLocation Loc, FileChangeReason Reason,
DirectoryLookup::DirType FileType) {
}
/// Ident - This callback is invoked when a #ident or #sccs directive is read.
///
virtual void Ident(SourceLocation Loc, const std::string &str) {
}
};
} // end namespace clang
#endif
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