1//===--- SimpleFormatContext.h ----------------------------------*- 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/// \file 11/// 12/// \brief Defines a utility class for use of clang-format in libclang 13// 14//===----------------------------------------------------------------------===// 15 16#ifndef LLVM_CLANG_LIB_INDEX_SIMPLEFORMATCONTEXT_H 17#define LLVM_CLANG_LIB_INDEX_SIMPLEFORMATCONTEXT_H 18 19#include "clang/Basic/Diagnostic.h" 20#include "clang/Basic/DiagnosticOptions.h" 21#include "clang/Basic/FileManager.h" 22#include "clang/Basic/LangOptions.h" 23#include "clang/Basic/SourceManager.h" 24#include "clang/Rewrite/Core/Rewriter.h" 25#include "llvm/Support/FileSystem.h" 26#include "llvm/Support/Path.h" 27#include "llvm/Support/raw_ostream.h" 28 29namespace clang { 30namespace index { 31 32/// \brief A small class to be used by libclang clients to format 33/// a declaration string in memory. This object is instantiated once 34/// and used each time a formatting is needed. 35class SimpleFormatContext { 36public: 37 SimpleFormatContext(LangOptions Options) 38 : DiagOpts(new DiagnosticOptions()), 39 Diagnostics(new DiagnosticsEngine(new DiagnosticIDs, 40 DiagOpts.get())), 41 InMemoryFileSystem(new vfs::InMemoryFileSystem), 42 Files(FileSystemOptions(), InMemoryFileSystem), 43 Sources(*Diagnostics, Files), 44 Rewrite(Sources, Options) { 45 Diagnostics->setClient(new IgnoringDiagConsumer, true); 46 } 47 48 FileID createInMemoryFile(StringRef Name, StringRef Content) { 49 InMemoryFileSystem->addFile(Name, 0, 50 llvm::MemoryBuffer::getMemBuffer(Content)); 51 const FileEntry *Entry = Files.getFile(Name); 52 assert(Entry != nullptr); 53 return Sources.createFileID(Entry, SourceLocation(), SrcMgr::C_User); 54 } 55 56 std::string getRewrittenText(FileID ID) { 57 std::string Result; 58 llvm::raw_string_ostream OS(Result); 59 Rewrite.getEditBuffer(ID).write(OS); 60 OS.flush(); 61 return Result; 62 } 63 64 IntrusiveRefCntPtr<DiagnosticOptions> DiagOpts; 65 IntrusiveRefCntPtr<DiagnosticsEngine> Diagnostics; 66 IntrusiveRefCntPtr<vfs::InMemoryFileSystem> InMemoryFileSystem; 67 FileManager Files; 68 SourceManager Sources; 69 Rewriter Rewrite; 70}; 71 72} // end namespace index 73} // end namespace clang 74 75#endif 76