1 //===--- MacroPPCallbacks.h -------------------------------------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file defines implementation for the macro preprocessors callbacks.
12 //===----------------------------------------------------------------------===//
14 #ifndef LLVM_CLANG_LIB_CODEGEN_MACROPPCALLBACKS_H
15 #define LLVM_CLANG_LIB_CODEGEN_MACROPPCALLBACKS_H
17 #include "clang/Lex/PPCallbacks.h"
28 class MacroPPCallbacks : public PPCallbacks {
29 /// A pointer to code generator, where debug info generator can be found.
35 /// Location of recent included file, used for line number.
36 SourceLocation LastHashLoc;
38 /// Counts current number of command line included files, which were entered
39 /// and were not exited yet.
40 int EnteredCommandLineIncludeFiles = 0;
42 enum FileScopeStatus {
43 NoScope = 0, // Scope is not initialized yet.
44 InitializedScope, // Main file scope is initialized but not set yet.
45 BuiltinScope, // <built-in> and <command line> file scopes.
46 CommandLineIncludeScope, // Included file, from <command line> file, scope.
47 MainFileScope // Main file scope.
49 FileScopeStatus Status;
51 /// Parent contains all entered files that were not exited yet according to
52 /// the inclusion order.
53 llvm::SmallVector<llvm::DIMacroFile *, 4> Scopes;
55 /// Get current DIMacroFile scope.
56 /// \return current DIMacroFile scope or nullptr if there is no such scope.
57 llvm::DIMacroFile *getCurrentScope();
59 /// Get current line location or invalid location.
60 /// \param Loc current line location.
61 /// \return current line location \p `Loc`, or invalid location if it's in a
62 /// skipped file scope.
63 SourceLocation getCorrectLocation(SourceLocation Loc);
65 /// Use the passed preprocessor to write the macro name and value from the
66 /// given macro info and identifier info into the given \p `Name` and \p
67 /// `Value` output streams.
69 /// \param II Identifier info, used to get the Macro name.
70 /// \param MI Macro info, used to get the Macro argumets and values.
71 /// \param PP Preprocessor.
72 /// \param [out] Name Place holder for returned macro name and arguments.
73 /// \param [out] Value Place holder for returned macro value.
74 static void writeMacroDefinition(const IdentifierInfo &II,
75 const MacroInfo &MI, Preprocessor &PP,
76 raw_ostream &Name, raw_ostream &Value);
78 /// Update current file scope status to next file scope.
79 void updateStatusToNextScope();
81 /// Handle the case when entering a file.
83 /// \param Loc Indicates the new location.
84 void FileEntered(SourceLocation Loc);
86 /// Handle the case when exiting a file.
88 /// \param Loc Indicates the new location.
89 void FileExited(SourceLocation Loc);
92 MacroPPCallbacks(CodeGenerator *Gen, Preprocessor &PP);
94 /// Callback invoked whenever a source file is entered or exited.
96 /// \param Loc Indicates the new location.
97 /// \param PrevFID the file that was exited if \p Reason is ExitFile.
98 void FileChanged(SourceLocation Loc, FileChangeReason Reason,
99 SrcMgr::CharacteristicKind FileType,
100 FileID PrevFID = FileID()) override;
102 /// Callback invoked whenever a directive (#xxx) is processed.
103 void InclusionDirective(SourceLocation HashLoc, const Token &IncludeTok,
104 StringRef FileName, bool IsAngled,
105 CharSourceRange FilenameRange, const FileEntry *File,
106 StringRef SearchPath, StringRef RelativePath,
107 const Module *Imported,
108 SrcMgr::CharacteristicKind FileType) override;
110 /// Hook called whenever a macro definition is seen.
111 void MacroDefined(const Token &MacroNameTok,
112 const MacroDirective *MD) override;
114 /// Hook called whenever a macro \#undef is seen.
116 /// MD is released immediately following this callback.
117 void MacroUndefined(const Token &MacroNameTok, const MacroDefinition &MD,
118 const MacroDirective *Undef) override;
121 } // end namespace clang