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  1. //===- TypeVisitorCallbacks.h -----------------------------------*- 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. #ifndef LLVM_DEBUGINFO_CODEVIEW_TYPEVISITORCALLBACKS_H
  10. #define LLVM_DEBUGINFO_CODEVIEW_TYPEVISITORCALLBACKS_H
  11.  
  12. #include "llvm/DebugInfo/CodeView/TypeRecord.h"
  13. #include "llvm/Support/Error.h"
  14.  
  15. namespace llvm {
  16. namespace codeview {
  17.  
  18. class TypeVisitorCallbacks {
  19. public:
  20.   virtual ~TypeVisitorCallbacks() = default;
  21.  
  22.   /// Action to take on unknown types. By default, they are ignored.
  23.   virtual Error visitUnknownType(CVType &Record) { return Error::success(); }
  24.   /// Paired begin/end actions for all types. Receives all record data,
  25.   /// including the fixed-length record prefix.  visitTypeBegin() should return
  26.   /// the type of the Record, or an error if it cannot be determined.  Exactly
  27.   /// one of the two visitTypeBegin methods will be called, depending on whether
  28.   /// records are being visited sequentially or randomly.  An implementation
  29.   /// should be prepared to handle both (or assert if it can't handle random
  30.   /// access visitation).
  31.   virtual Error visitTypeBegin(CVType &Record) { return Error::success(); }
  32.   virtual Error visitTypeBegin(CVType &Record, TypeIndex Index) {
  33.     return Error::success();
  34.   }
  35.   virtual Error visitTypeEnd(CVType &Record) { return Error::success(); }
  36.  
  37.   virtual Error visitUnknownMember(CVMemberRecord &Record) {
  38.     return Error::success();
  39.   }
  40.  
  41.   virtual Error visitMemberBegin(CVMemberRecord &Record) {
  42.     return Error::success();
  43.   }
  44.  
  45.   virtual Error visitMemberEnd(CVMemberRecord &Record) {
  46.     return Error::success();
  47.   }
  48.  
  49. #define TYPE_RECORD(EnumName, EnumVal, Name)                                   \
  50.   virtual Error visitKnownRecord(CVType &CVR, Name##Record &Record) {          \
  51.     return Error::success();                                                   \
  52.   }
  53. #define MEMBER_RECORD(EnumName, EnumVal, Name)                                 \
  54.   virtual Error visitKnownMember(CVMemberRecord &CVM, Name##Record &Record) {  \
  55.     return Error::success();                                                   \
  56.   }
  57.  
  58. #define TYPE_RECORD_ALIAS(EnumName, EnumVal, Name, AliasName)
  59. #define MEMBER_RECORD_ALIAS(EnumName, EnumVal, Name, AliasName)
  60. #include "llvm/DebugInfo/CodeView/CodeViewTypes.def"
  61. #undef TYPE_RECORD
  62. #undef TYPE_RECORD_ALIAS
  63. #undef MEMBER_RECORD
  64. #undef MEMBER_RECORD_ALIAS
  65. };
  66.  
  67. } // end namespace codeview
  68. } // end namespace llvm
  69.  
  70. #endif // LLVM_DEBUGINFO_CODEVIEW_TYPEVISITORCALLBACKS_H
  71.