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1//===- ExternalPreprocessorSource.h - Abstract Macro Interface --*- C++ -*-===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// This file defines the ExternalPreprocessorSource interface, which enables
10// construction of macro definitions from some external source.
11//
12//===----------------------------------------------------------------------===//
13#ifndef LLVM_CLANG_LEX_EXTERNALPREPROCESSORSOURCE_H
14#define LLVM_CLANG_LEX_EXTERNALPREPROCESSORSOURCE_H
15
16namespace clang {
17
18class IdentifierInfo;
19class Module;
20
21/// Abstract interface for external sources of preprocessor
22/// information.
23///
24/// This abstract class allows an external sources (such as the \c ASTReader)
25/// to provide additional preprocessing information.
26class ExternalPreprocessorSource {
27public:
28 virtual ~ExternalPreprocessorSource();
29
30 /// Read the set of macros defined by this external macro source.
31 virtual void ReadDefinedMacros() = 0;
32
33 /// Update an out-of-date identifier.
34 virtual void updateOutOfDateIdentifier(IdentifierInfo &II) = 0;
35
36 /// Return the identifier associated with the given ID number.
37 ///
38 /// The ID 0 is associated with the NULL identifier.
39 virtual IdentifierInfo *GetIdentifier(unsigned ID) = 0;
40
41 /// Map a module ID to a module.
42 virtual Module *getModule(unsigned ModuleID) = 0;
43};
44
45}
46
47#endif
48

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source code of clang/include/clang/Lex/ExternalPreprocessorSource.h