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_EXTERNALPREPROCESSORSOURCE_H 15#define LLVM_CLANG_LEX_EXTERNALPREPROCESSORSOURCE_H 16 17namespace clang { 18 19class IdentifierInfo; 20class Module; 21 22/// \brief Abstract interface for external sources of preprocessor 23/// information. 24/// 25/// This abstract class allows an external sources (such as the \c ASTReader) 26/// to provide additional preprocessing information. 27class ExternalPreprocessorSource { 28public: 29 virtual ~ExternalPreprocessorSource(); 30 31 /// \brief Read the set of macros defined by this external macro source. 32 virtual void ReadDefinedMacros() = 0; 33 34 /// \brief Update an out-of-date identifier. 35 virtual void updateOutOfDateIdentifier(IdentifierInfo &II) = 0; 36 37 /// \brief Return the identifier associated with the given ID number. 38 /// 39 /// The ID 0 is associated with the NULL identifier. 40 virtual IdentifierInfo *GetIdentifier(unsigned ID) = 0; 41 42 /// \brief Map a module ID to a module. 43 virtual Module *getModule(unsigned ModuleID) = 0; 44}; 45 46} 47 48#endif 49