| //===--- PPCallbacks.h - Callbacks for Preprocessor actions -----*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| /// |
| /// \file |
| /// \brief Defines the PPCallbacks interface. |
| /// |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_CLANG_LEX_PPCALLBACKS_H |
| #define LLVM_CLANG_LEX_PPCALLBACKS_H |
| |
| #include "clang/Lex/DirectoryLookup.h" |
| #include "clang/Basic/SourceLocation.h" |
| #include "clang/Basic/DiagnosticIDs.h" |
| #include "llvm/ADT/StringRef.h" |
| #include <string> |
| |
| namespace clang { |
| class SourceLocation; |
| class Token; |
| class IdentifierInfo; |
| class MacroInfo; |
| |
| /// \brief This interface provides a way to observe the actions of the |
| /// preprocessor as it does its thing. |
| /// |
| /// Clients can define their hooks here to implement preprocessor level tools. |
| class PPCallbacks { |
| public: |
| virtual ~PPCallbacks(); |
| |
| enum FileChangeReason { |
| EnterFile, ExitFile, SystemHeaderPragma, RenameFile |
| }; |
| |
| /// \brief Callback invoked whenever a source file is entered or exited. |
| /// |
| /// \param Loc Indicates the new location. |
| /// \param PrevFID the file that was exited if \p Reason is ExitFile. |
| virtual void FileChanged(SourceLocation Loc, FileChangeReason Reason, |
| SrcMgr::CharacteristicKind FileType, |
| FileID PrevFID = FileID()) { |
| } |
| |
| /// \brief Callback invoked whenever a source file is skipped as the result |
| /// of header guard optimization. |
| /// |
| /// \param ParentFile The file that \#included the skipped file. |
| /// |
| /// \param FilenameTok The token in ParentFile that indicates the |
| /// skipped file. |
| virtual void FileSkipped(const FileEntry &ParentFile, |
| const Token &FilenameTok, |
| SrcMgr::CharacteristicKind FileType) { |
| } |
| |
| /// \brief Callback invoked whenever an inclusion directive results in a |
| /// file-not-found error. |
| /// |
| /// \param FileName The name of the file being included, as written in the |
| /// source code. |
| /// |
| /// \param RecoveryPath If this client indicates that it can recover from |
| /// this missing file, the client should set this as an additional header |
| /// search patch. |
| /// |
| /// \returns true to indicate that the preprocessor should attempt to recover |
| /// by adding \p RecoveryPath as a header search path. |
| virtual bool FileNotFound(StringRef FileName, |
| SmallVectorImpl<char> &RecoveryPath) { |
| return false; |
| } |
| |
| /// \brief Callback invoked whenever an inclusion directive of |
| /// any kind (\c \#include, \c \#import, etc.) has been processed, regardless |
| /// of whether the inclusion will actually result in an inclusion. |
| /// |
| /// \param HashLoc The location of the '#' that starts the inclusion |
| /// directive. |
| /// |
| /// \param IncludeTok The token that indicates the kind of inclusion |
| /// directive, e.g., 'include' or 'import'. |
| /// |
| /// \param FileName The name of the file being included, as written in the |
| /// source code. |
| /// |
| /// \param IsAngled Whether the file name was enclosed in angle brackets; |
| /// otherwise, it was enclosed in quotes. |
| /// |
| /// \param FilenameRange The character range of the quotes or angle brackets |
| /// for the written file name. |
| /// |
| /// \param File The actual file that may be included by this inclusion |
| /// directive. |
| /// |
| /// \param EndLoc The location of the last token within the inclusion |
| /// directive. |
| /// |
| /// \param SearchPath Contains the search path which was used to find the file |
| /// in the file system. If the file was found via an absolute include path, |
| /// SearchPath will be empty. For framework includes, the SearchPath and |
| /// RelativePath will be split up. For example, if an include of "Some/Some.h" |
| /// is found via the framework path |
| /// "path/to/Frameworks/Some.framework/Headers/Some.h", SearchPath will be |
| /// "path/to/Frameworks/Some.framework/Headers" and RelativePath will be |
| /// "Some.h". |
| /// |
| /// \param RelativePath The path relative to SearchPath, at which the include |
| /// file was found. This is equal to FileName except for framework includes. |
| virtual void InclusionDirective(SourceLocation HashLoc, |
| const Token &IncludeTok, |
| StringRef FileName, |
| bool IsAngled, |
| CharSourceRange FilenameRange, |
| const FileEntry *File, |
| StringRef SearchPath, |
| StringRef RelativePath) { |
| } |
| |
| /// \brief Callback invoked when the end of the main file is reached. |
| /// |
| /// No subsequent callbacks will be made. |
| virtual void EndOfMainFile() { |
| } |
| |
| /// \brief Callback invoked when a \#ident or \#sccs directive is read. |
| /// \param Loc The location of the directive. |
| /// \param str The text of the directive. |
| /// |
| virtual void Ident(SourceLocation Loc, const std::string &str) { |
| } |
| |
| /// \brief Callback invoked when a \#pragma comment directive is read. |
| virtual void PragmaComment(SourceLocation Loc, const IdentifierInfo *Kind, |
| const std::string &Str) { |
| } |
| |
| /// \brief Callback invoked when a \#pragma message directive is read. |
| /// \param Loc The location of the message directive. |
| /// \param Str The text of the message directive. |
| virtual void PragmaMessage(SourceLocation Loc, StringRef Str) { |
| } |
| |
| /// \brief Callback invoked when a \#pragma gcc dianostic push directive |
| /// is read. |
| virtual void PragmaDiagnosticPush(SourceLocation Loc, |
| StringRef Namespace) { |
| } |
| |
| /// \brief Callback invoked when a \#pragma gcc dianostic pop directive |
| /// is read. |
| virtual void PragmaDiagnosticPop(SourceLocation Loc, |
| StringRef Namespace) { |
| } |
| |
| /// \brief Callback invoked when a \#pragma gcc dianostic directive is read. |
| virtual void PragmaDiagnostic(SourceLocation Loc, StringRef Namespace, |
| diag::Mapping mapping, StringRef Str) { |
| } |
| |
| /// \brief Called by Preprocessor::HandleMacroExpandedIdentifier when a |
| /// macro invocation is found. |
| virtual void MacroExpands(const Token &MacroNameTok, const MacroInfo* MI, |
| SourceRange Range) { |
| } |
| |
| /// \brief Hook called whenever a macro definition is seen. |
| virtual void MacroDefined(const Token &MacroNameTok, const MacroInfo *MI) { |
| } |
| |
| /// \brief Hook called whenever a macro \#undef is seen. |
| /// |
| /// MI is released immediately following this callback. |
| virtual void MacroUndefined(const Token &MacroNameTok, const MacroInfo *MI) { |
| } |
| |
| /// \brief Hook called whenever the 'defined' operator is seen. |
| virtual void Defined(const Token &MacroNameTok) { |
| } |
| |
| /// \brief Hook called when a source range is skipped. |
| /// \param Range The SourceRange that was skipped. The range begins at the |
| /// \#if/\#else directive and ends after the \#endif/\#else directive. |
| virtual void SourceRangeSkipped(SourceRange Range) { |
| } |
| |
| /// \brief Hook called whenever an \#if is seen. |
| /// \param Loc the source location of the directive. |
| /// \param ConditionRange The SourceRange of the expression being tested. |
| /// |
| // FIXME: better to pass in a list (or tree!) of Tokens. |
| virtual void If(SourceLocation Loc, SourceRange ConditionRange) { |
| } |
| |
| /// \brief Hook called whenever an \#elif is seen. |
| /// \param Loc the source location of the directive. |
| /// \param ConditionRange The SourceRange of the expression being tested. |
| /// \param IfLoc the source location of the \#if/\#ifdef/\#ifndef directive. |
| // FIXME: better to pass in a list (or tree!) of Tokens. |
| virtual void Elif(SourceLocation Loc, SourceRange ConditionRange, |
| SourceLocation IfLoc) { |
| } |
| |
| /// \brief Hook called whenever an \#ifdef is seen. |
| /// \param Loc the source location of the directive. |
| /// \param MacroNameTok Information on the token being tested. |
| virtual void Ifdef(SourceLocation Loc, const Token &MacroNameTok) { |
| } |
| |
| /// \brief Hook called whenever an \#ifndef is seen. |
| /// \param Loc the source location of the directive. |
| /// \param MacroNameTok Information on the token being tested. |
| virtual void Ifndef(SourceLocation Loc, const Token &MacroNameTok) { |
| } |
| |
| /// \brief Hook called whenever an \#else is seen. |
| /// \param Loc the source location of the directive. |
| /// \param IfLoc the source location of the \#if/\#ifdef/\#ifndef directive. |
| virtual void Else(SourceLocation Loc, SourceLocation IfLoc) { |
| } |
| |
| /// \brief Hook called whenever an \#endif is seen. |
| /// \param Loc the source location of the directive. |
| /// \param IfLoc the source location of the \#if/\#ifdef/\#ifndef directive. |
| virtual void Endif(SourceLocation Loc, SourceLocation IfLoc) { |
| } |
| }; |
| |
| /// \brief Simple wrapper class for chaining callbacks. |
| class PPChainedCallbacks : public PPCallbacks { |
| virtual void anchor(); |
| PPCallbacks *First, *Second; |
| |
| public: |
| PPChainedCallbacks(PPCallbacks *_First, PPCallbacks *_Second) |
| : First(_First), Second(_Second) {} |
| ~PPChainedCallbacks() { |
| delete Second; |
| delete First; |
| } |
| |
| virtual void FileChanged(SourceLocation Loc, FileChangeReason Reason, |
| SrcMgr::CharacteristicKind FileType, |
| FileID PrevFID) { |
| First->FileChanged(Loc, Reason, FileType, PrevFID); |
| Second->FileChanged(Loc, Reason, FileType, PrevFID); |
| } |
| |
| virtual void FileSkipped(const FileEntry &ParentFile, |
| const Token &FilenameTok, |
| SrcMgr::CharacteristicKind FileType) { |
| First->FileSkipped(ParentFile, FilenameTok, FileType); |
| Second->FileSkipped(ParentFile, FilenameTok, FileType); |
| } |
| |
| virtual bool FileNotFound(StringRef FileName, |
| SmallVectorImpl<char> &RecoveryPath) { |
| return First->FileNotFound(FileName, RecoveryPath) || |
| Second->FileNotFound(FileName, RecoveryPath); |
| } |
| |
| virtual void InclusionDirective(SourceLocation HashLoc, |
| const Token &IncludeTok, |
| StringRef FileName, |
| bool IsAngled, |
| CharSourceRange FilenameRange, |
| const FileEntry *File, |
| StringRef SearchPath, |
| StringRef RelativePath) { |
| First->InclusionDirective(HashLoc, IncludeTok, FileName, IsAngled, |
| FilenameRange, File, SearchPath, RelativePath); |
| Second->InclusionDirective(HashLoc, IncludeTok, FileName, IsAngled, |
| FilenameRange, File, SearchPath, RelativePath); |
| } |
| |
| virtual void EndOfMainFile() { |
| First->EndOfMainFile(); |
| Second->EndOfMainFile(); |
| } |
| |
| virtual void Ident(SourceLocation Loc, const std::string &str) { |
| First->Ident(Loc, str); |
| Second->Ident(Loc, str); |
| } |
| |
| virtual void PragmaComment(SourceLocation Loc, const IdentifierInfo *Kind, |
| const std::string &Str) { |
| First->PragmaComment(Loc, Kind, Str); |
| Second->PragmaComment(Loc, Kind, Str); |
| } |
| |
| virtual void PragmaMessage(SourceLocation Loc, StringRef Str) { |
| First->PragmaMessage(Loc, Str); |
| Second->PragmaMessage(Loc, Str); |
| } |
| |
| virtual void PragmaDiagnosticPush(SourceLocation Loc, |
| StringRef Namespace) { |
| First->PragmaDiagnosticPush(Loc, Namespace); |
| Second->PragmaDiagnosticPush(Loc, Namespace); |
| } |
| |
| virtual void PragmaDiagnosticPop(SourceLocation Loc, |
| StringRef Namespace) { |
| First->PragmaDiagnosticPop(Loc, Namespace); |
| Second->PragmaDiagnosticPop(Loc, Namespace); |
| } |
| |
| virtual void PragmaDiagnostic(SourceLocation Loc, StringRef Namespace, |
| diag::Mapping mapping, StringRef Str) { |
| First->PragmaDiagnostic(Loc, Namespace, mapping, Str); |
| Second->PragmaDiagnostic(Loc, Namespace, mapping, Str); |
| } |
| |
| virtual void MacroExpands(const Token &MacroNameTok, const MacroInfo* MI, |
| SourceRange Range) { |
| First->MacroExpands(MacroNameTok, MI, Range); |
| Second->MacroExpands(MacroNameTok, MI, Range); |
| } |
| |
| virtual void MacroDefined(const Token &MacroNameTok, const MacroInfo *MI) { |
| First->MacroDefined(MacroNameTok, MI); |
| Second->MacroDefined(MacroNameTok, MI); |
| } |
| |
| virtual void MacroUndefined(const Token &MacroNameTok, const MacroInfo *MI) { |
| First->MacroUndefined(MacroNameTok, MI); |
| Second->MacroUndefined(MacroNameTok, MI); |
| } |
| |
| virtual void Defined(const Token &MacroNameTok) { |
| First->Defined(MacroNameTok); |
| Second->Defined(MacroNameTok); |
| } |
| |
| virtual void SourceRangeSkipped(SourceRange Range) { |
| First->SourceRangeSkipped(Range); |
| Second->SourceRangeSkipped(Range); |
| } |
| |
| /// \brief Hook called whenever an \#if is seen. |
| virtual void If(SourceLocation Loc, SourceRange ConditionRange) { |
| First->If(Loc, ConditionRange); |
| Second->If(Loc, ConditionRange); |
| } |
| |
| /// \brief Hook called whenever an \#if is seen. |
| virtual void Elif(SourceLocation Loc, SourceRange ConditionRange, |
| SourceLocation IfLoc) { |
| First->Elif(Loc, ConditionRange, IfLoc); |
| Second->Elif(Loc, ConditionRange, IfLoc); |
| } |
| |
| /// \brief Hook called whenever an \#ifdef is seen. |
| virtual void Ifdef(SourceLocation Loc, const Token &MacroNameTok) { |
| First->Ifdef(Loc, MacroNameTok); |
| Second->Ifdef(Loc, MacroNameTok); |
| } |
| |
| /// \brief Hook called whenever an \#ifndef is seen. |
| virtual void Ifndef(SourceLocation Loc, const Token &MacroNameTok) { |
| First->Ifndef(Loc, MacroNameTok); |
| Second->Ifndef(Loc, MacroNameTok); |
| } |
| |
| /// \brief Hook called whenever an \#else is seen. |
| virtual void Else(SourceLocation Loc, SourceLocation IfLoc) { |
| First->Else(Loc, IfLoc); |
| Second->Else(Loc, IfLoc); |
| } |
| |
| /// \brief Hook called whenever an \#endif is seen. |
| virtual void Endif(SourceLocation Loc, SourceLocation IfLoc) { |
| First->Endif(Loc, IfLoc); |
| Second->Endif(Loc, IfLoc); |
| } |
| }; |
| |
| } // end namespace clang |
| |
| #endif |