ValueObjectDynamicValue.h

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//===-- ValueObjectDynamicValue.h -------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
 
#ifndef LLDB_VALUEOBJECT_VALUEOBJECTDYNAMICVALUE_H
#define LLDB_VALUEOBJECT_VALUEOBJECTDYNAMICVALUE_H
 
#include "lldb/Core/Address.h"
#include "lldb/Symbol/CompilerType.h"
#include "lldb/Symbol/Type.h"
#include "lldb/Utility/ConstString.h"
#include "lldb/ValueObject/ValueObject.h"
#include "lldb/lldb-defines.h"
#include "lldb/lldb-enumerations.h"
#include "lldb/lldb-forward.h"
#include "lldb/lldb-private-enumerations.h"
 
#include <cassert>
#include <cstddef>
#include <cstdint>
#include <optional>
 
namespace lldb_private {
class DataExtractor;
class Declaration;
class Status;
 
/// A ValueObject that represents memory at a given address, viewed as some
/// set lldb type.
class ValueObjectDynamicValue : public ValueObject {
public:
  ~ValueObjectDynamicValue() override = default;
 
  std::optional<uint64_t> GetByteSize() override;
 
  ConstString GetTypeName() override;
 
  ConstString GetQualifiedTypeName() override;
 
  ConstString GetDisplayTypeName() override;
 
  llvm::Expected<uint32_t> CalculateNumChildren(uint32_t max) override;
 
  lldb::ValueType GetValueType() const override;
 
  bool IsInScope() override;
 
  bool IsDynamic() override { return true; }
 
  bool IsBaseClass() override {
    if (m_parent)
      return m_parent->IsBaseClass();
    return false;
  }
 
  bool GetIsConstant() const override { return false; }
 
  ValueObject *GetParent() override {
    return ((m_parent != nullptr) ? m_parent->GetParent() : nullptr);
  }
 
  const ValueObject *GetParent() const override {
    return ((m_parent != nullptr) ? m_parent->GetParent() : nullptr);
  }
 
  lldb::ValueObjectSP GetStaticValue() override { return m_parent->GetSP(); }
 
  bool SetValueFromCString(const char *value_str, Status &error) override;
 
  bool SetData(DataExtractor &data, Status &error) override;
 
  TypeImpl GetTypeImpl() override;
 
  lldb::VariableSP GetVariable() override {
    return m_parent ? m_parent->GetVariable() : nullptr;
  }
 
  lldb::LanguageType GetPreferredDisplayLanguage() override;
 
  void SetPreferredDisplayLanguage(lldb::LanguageType);
 
  bool IsSyntheticChildrenGenerated() override;
 
  void SetSyntheticChildrenGenerated(bool b) override;
 
  bool GetDeclaration(Declaration &decl) override;
 
  uint64_t GetLanguageFlags() override;
 
  void SetLanguageFlags(uint64_t flags) override;
 
protected:
  bool UpdateValue() override;
 
  LazyBool CanUpdateWithInvalidExecutionContext() override {
    return eLazyBoolYes;
  }
 
  lldb::DynamicValueType GetDynamicValueTypeImpl() override {
    return m_use_dynamic;
  }
 
  bool HasDynamicValueTypeInfo() override { return true; }
 
  CompilerType GetCompilerTypeImpl() override;
 
  Address m_address; ///< The variable that this value object is based upon
  TypeAndOrName m_dynamic_type_info; // We can have a type_sp or just a name
  lldb::DynamicValueType m_use_dynamic;
  TypeImpl m_type_impl;
 
private:
  friend class ValueObject;
  friend class ValueObjectConstResult;
  ValueObjectDynamicValue(ValueObject &parent,
                          lldb::DynamicValueType use_dynamic);
 
  ValueObjectDynamicValue(const ValueObjectDynamicValue &) = delete;
  const ValueObjectDynamicValue &
  operator=(const ValueObjectDynamicValue &) = delete;
};
 
} // namespace lldb_private
 
#endif // LLDB_VALUEOBJECT_VALUEOBJECTDYNAMICVALUE_H