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Diffstat (limited to 'include/clang/Lex/PPCallbacks.h')
-rw-r--r-- | include/clang/Lex/PPCallbacks.h | 122 |
1 files changed, 122 insertions, 0 deletions
diff --git a/include/clang/Lex/PPCallbacks.h b/include/clang/Lex/PPCallbacks.h new file mode 100644 index 0000000..e5cbeeb --- /dev/null +++ b/include/clang/Lex/PPCallbacks.h @@ -0,0 +1,122 @@ +//===--- 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. +// +//===----------------------------------------------------------------------===// +// +// This file 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 <string> + +namespace clang { + class SourceLocation; + class Token; + class IdentifierInfo; + class MacroInfo; + +/// PPCallbacks - 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 + }; + + /// FileChanged - This callback is invoked whenever a source file is + /// entered or exited. The SourceLocation indicates the new location, and + /// EnteringFile indicates whether this is because we are entering a new + /// #include'd file (when true) or whether we're exiting one because we ran + /// off the end (when false). + virtual void FileChanged(SourceLocation Loc, FileChangeReason Reason, + SrcMgr::CharacteristicKind FileType) { + } + + /// Ident - This callback is invoked when a #ident or #sccs directive is read. + /// + virtual void Ident(SourceLocation Loc, const std::string &str) { + } + + /// PragmaComment - This callback is invoked when a #pragma comment directive + /// is read. + /// + virtual void PragmaComment(SourceLocation Loc, const IdentifierInfo *Kind, + const std::string &Str) { + } + + /// MacroExpands - This is called by + /// Preprocessor::HandleMacroExpandedIdentifier when a macro invocation is + /// found. + virtual void MacroExpands(const Token &Id, const MacroInfo* MI) { + } + + /// MacroDefined - This hook is called whenever a macro definition is seen. + virtual void MacroDefined(const IdentifierInfo *II, const MacroInfo *MI) { + } + + /// MacroUndefined - This hook is called whenever a macro #undef is seen. + /// MI is released immediately following this callback. + virtual void MacroUndefined(const IdentifierInfo *II, const MacroInfo *MI) { + } +}; + +/// PPChainedCallbacks - Simple wrapper class for chaining callbacks. +class PPChainedCallbacks : public PPCallbacks { + 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) { + First->FileChanged(Loc, Reason, FileType); + Second->FileChanged(Loc, Reason, FileType); + } + + 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 MacroExpands(const Token &Id, const MacroInfo* MI) { + First->MacroExpands(Id, MI); + Second->MacroExpands(Id, MI); + } + + virtual void MacroDefined(const IdentifierInfo *II, const MacroInfo *MI) { + First->MacroDefined(II, MI); + Second->MacroDefined(II, MI); + } + + virtual void MacroUndefined(const IdentifierInfo *II, const MacroInfo *MI) { + First->MacroUndefined(II, MI); + Second->MacroUndefined(II, MI); + } +}; + +} // end namespace clang + +#endif |