| //===- IPDBEnumChildren.h - base interface for child enumerator -*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_DEBUGINFO_PDB_IPDBENUMCHILDREN_H |
| #define LLVM_DEBUGINFO_PDB_IPDBENUMCHILDREN_H |
| |
| #include <cassert> |
| #include <cstdint> |
| #include <memory> |
| |
| namespace llvm { |
| namespace pdb { |
| |
| template <typename ChildType> class IPDBEnumChildren { |
| public: |
| using ChildTypePtr = std::unique_ptr<ChildType>; |
| using MyType = IPDBEnumChildren<ChildType>; |
| |
| virtual ~IPDBEnumChildren() = default; |
| |
| virtual uint32_t getChildCount() const = 0; |
| virtual ChildTypePtr getChildAtIndex(uint32_t Index) const = 0; |
| virtual ChildTypePtr getNext() = 0; |
| virtual void reset() = 0; |
| }; |
| |
| template <typename ChildType> |
| class NullEnumerator : public IPDBEnumChildren<ChildType> { |
| virtual uint32_t getChildCount() const override { return 0; } |
| virtual std::unique_ptr<ChildType> |
| getChildAtIndex(uint32_t Index) const override { |
| return nullptr; |
| } |
| virtual std::unique_ptr<ChildType> getNext() override { |
| return nullptr; |
| } |
| virtual void reset() override {} |
| }; |
| |
| } // end namespace pdb |
| } // end namespace llvm |
| |
| #endif // LLVM_DEBUGINFO_PDB_IPDBENUMCHILDREN_H |