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 29 namespace clang { 30 namespace 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. 35 class SimpleFormatContext { 36 public: 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
