ExternalPreprocessorSource.h revision 6c6c54a59a6e7dbe63ff6a9bbab76f6e0c7c8462 
1//===- ExternalPreprocessorSource.h - Abstract Macro Interface --*- C++ -*-===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10//  This file defines the ExternalPreprocessorSource interface, which enables
11//  construction of macro definitions from some external source.
12//
13//===----------------------------------------------------------------------===//
14#ifndef LLVM_CLANG_LEX_EXTERNAL_PREPROCESSOR_SOURCE_H
15#define LLVM_CLANG_LEX_EXTERNAL_PREPROCESSOR_SOURCE_H
16
17namespace clang {
18
19/// \brief Abstract interface for external sources of preprocessor
20/// information.
21///
22/// This abstract class allows an external sources (such as the \c ASTReader)
23/// to provide additional macro definitions.
24class ExternalPreprocessorSource {
25public:
26  virtual ~ExternalPreprocessorSource();
27
28  /// \brief Read the set of macros defined by this external macro source.
29  virtual void ReadDefinedMacros() = 0;
30
31  /// \brief Update an out-of-date identifier.
32  virtual void updateOutOfDateIdentifier(IdentifierInfo &II) = 0;
33};
34
35}
36
37#endif // LLVM_CLANG_LEX_EXTERNAL_PREPROCESSOR_SOURCE_H
38