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  1. //===--- TypeLocVisitor.h - Visitor for TypeLoc subclasses ------*- C++ -*-===//
  2. //
  3. // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
  4. // See https://llvm.org/LICENSE.txt for license information.
  5. // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  6. //
  7. //===----------------------------------------------------------------------===//
  8. //
  9. //  This file defines the TypeLocVisitor interface.
  10. //
  11. //===----------------------------------------------------------------------===//
  12. #ifndef LLVM_CLANG_AST_TYPELOCVISITOR_H
  13. #define LLVM_CLANG_AST_TYPELOCVISITOR_H
  14.  
  15. #include "clang/AST/TypeLoc.h"
  16. #include "llvm/Support/ErrorHandling.h"
  17.  
  18. namespace clang {
  19.  
  20. #define DISPATCH(CLASSNAME) \
  21.   return static_cast<ImplClass*>(this)-> \
  22.     Visit##CLASSNAME(TyLoc.castAs<CLASSNAME>())
  23.  
  24. template<typename ImplClass, typename RetTy=void>
  25. class TypeLocVisitor {
  26. public:
  27.   RetTy Visit(TypeLoc TyLoc) {
  28.     switch (TyLoc.getTypeLocClass()) {
  29. #define ABSTRACT_TYPELOC(CLASS, PARENT)
  30. #define TYPELOC(CLASS, PARENT) \
  31.     case TypeLoc::CLASS: DISPATCH(CLASS##TypeLoc);
  32. #include "clang/AST/TypeLocNodes.def"
  33.     }
  34.     llvm_unreachable("unexpected type loc class!");
  35.   }
  36.  
  37.   RetTy Visit(UnqualTypeLoc TyLoc) {
  38.     switch (TyLoc.getTypeLocClass()) {
  39. #define ABSTRACT_TYPELOC(CLASS, PARENT)
  40. #define TYPELOC(CLASS, PARENT) \
  41.     case TypeLoc::CLASS: DISPATCH(CLASS##TypeLoc);
  42. #include "clang/AST/TypeLocNodes.def"
  43.     }
  44.     llvm_unreachable("unexpected type loc class!");
  45.   }
  46.  
  47. #define TYPELOC(CLASS, PARENT)      \
  48.   RetTy Visit##CLASS##TypeLoc(CLASS##TypeLoc TyLoc) { \
  49.     DISPATCH(PARENT);               \
  50.   }
  51. #include "clang/AST/TypeLocNodes.def"
  52.  
  53.   RetTy VisitTypeLoc(TypeLoc TyLoc) { return RetTy(); }
  54. };
  55.  
  56. #undef DISPATCH
  57.  
  58. }  // end namespace clang
  59.  
  60. #endif // LLVM_CLANG_AST_TYPELOCVISITOR_H
  61.