1*67e74705SXin Li //===- ExternalPreprocessorSource.h - Abstract Macro Interface --*- C++ -*-===// 2*67e74705SXin Li // 3*67e74705SXin Li // The LLVM Compiler Infrastructure 4*67e74705SXin Li // 5*67e74705SXin Li // This file is distributed under the University of Illinois Open Source 6*67e74705SXin Li // License. See LICENSE.TXT for details. 7*67e74705SXin Li // 8*67e74705SXin Li //===----------------------------------------------------------------------===// 9*67e74705SXin Li // 10*67e74705SXin Li // This file defines the ExternalPreprocessorSource interface, which enables 11*67e74705SXin Li // construction of macro definitions from some external source. 12*67e74705SXin Li // 13*67e74705SXin Li //===----------------------------------------------------------------------===// 14*67e74705SXin Li #ifndef LLVM_CLANG_LEX_EXTERNALPREPROCESSORSOURCE_H 15*67e74705SXin Li #define LLVM_CLANG_LEX_EXTERNALPREPROCESSORSOURCE_H 16*67e74705SXin Li 17*67e74705SXin Li namespace clang { 18*67e74705SXin Li 19*67e74705SXin Li class IdentifierInfo; 20*67e74705SXin Li class Module; 21*67e74705SXin Li 22*67e74705SXin Li /// \brief Abstract interface for external sources of preprocessor 23*67e74705SXin Li /// information. 24*67e74705SXin Li /// 25*67e74705SXin Li /// This abstract class allows an external sources (such as the \c ASTReader) 26*67e74705SXin Li /// to provide additional preprocessing information. 27*67e74705SXin Li class ExternalPreprocessorSource { 28*67e74705SXin Li public: 29*67e74705SXin Li virtual ~ExternalPreprocessorSource(); 30*67e74705SXin Li 31*67e74705SXin Li /// \brief Read the set of macros defined by this external macro source. 32*67e74705SXin Li virtual void ReadDefinedMacros() = 0; 33*67e74705SXin Li 34*67e74705SXin Li /// \brief Update an out-of-date identifier. 35*67e74705SXin Li virtual void updateOutOfDateIdentifier(IdentifierInfo &II) = 0; 36*67e74705SXin Li 37*67e74705SXin Li /// \brief Return the identifier associated with the given ID number. 38*67e74705SXin Li /// 39*67e74705SXin Li /// The ID 0 is associated with the NULL identifier. 40*67e74705SXin Li virtual IdentifierInfo *GetIdentifier(unsigned ID) = 0; 41*67e74705SXin Li 42*67e74705SXin Li /// \brief Map a module ID to a module. 43*67e74705SXin Li virtual Module *getModule(unsigned ModuleID) = 0; 44*67e74705SXin Li }; 45*67e74705SXin Li 46*67e74705SXin Li } 47*67e74705SXin Li 48*67e74705SXin Li #endif 49