1 //===- ExternalPreprocessorSource.h - Abstract Macro Interface --*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file defines the ExternalPreprocessorSource interface, which enables
11 // construction of macro definitions from some external source.
13 //===----------------------------------------------------------------------===//
14 #ifndef LLVM_CLANG_LEX_EXTERNALPREPROCESSORSOURCE_H
15 #define LLVM_CLANG_LEX_EXTERNALPREPROCESSORSOURCE_H
22 /// \brief Abstract interface for external sources of preprocessor
25 /// This abstract class allows an external sources (such as the \c ASTReader)
26 /// to provide additional preprocessing information.
27 class ExternalPreprocessorSource {
29 virtual ~ExternalPreprocessorSource();
31 /// \brief Read the set of macros defined by this external macro source.
32 virtual void ReadDefinedMacros() = 0;
34 /// \brief Update an out-of-date identifier.
35 virtual void updateOutOfDateIdentifier(IdentifierInfo &II) = 0;
37 /// \brief Return the identifier associated with the given ID number.
39 /// The ID 0 is associated with the NULL identifier.
40 virtual IdentifierInfo *GetIdentifier(unsigned ID) = 0;
42 /// \brief Map a module ID to a module.
43 virtual Module *getModule(unsigned ModuleID) = 0;