ccf::kv::ReadableUnitValueHandle< Unit > Class Template Reference

#include <unit_value_handle.h>

Inherited by ccf::kv::UnitValueHandle< Unit >.

Public Member Functions
	ReadableUnitValueHandle (ccf::kv::untyped::MapHandle &uh)
bool	has ()
std::optional< Version >	get_version_of_previous_write ()

Protected Attributes
ccf::kv::untyped::MapHandle &	read_handle

Detailed Description

template<typename Unit>
class ccf::kv::ReadableUnitValueHandle< Unit >

Grants read access to a ccf::kv::UnitValue, as part of a ccf::kv::Tx.

Constructor & Destructor Documentation

ReadableUnitValueHandle()

template<typename Unit >

ccf::kv::ReadableUnitValueHandle< Unit >::ReadableUnitValueHandle ( ccf::kv::untyped::MapHandle &  uh )

inline

Member Function Documentation

get_version_of_previous_write()

template<typename Unit >

std::optional< Version > ccf::kv::ReadableUnitValueHandle< Unit >::get_version_of_previous_write ( )

inline

Get version when this value was last written to, by a previous transaction.

See also

ccf::kv::ReadableMapHandle::get_version_of_previous_write

Returns

Optional containing version of applied transaction which last wrote to this value, or nullopt if such a version does not exist

has()

template<typename Unit >

bool ccf::kv::ReadableUnitValueHandle< Unit >::has ( )

inline

Test if the value has been touched.

Returns

Boolean true iff the value is defined

Member Data Documentation

read_handle

template<typename Unit >

ccf::kv::untyped::MapHandle& ccf::kv::ReadableUnitValueHandle< Unit >::read_handle

protected

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The documentation for this class was generated from the following file:

• include/ccf/kv/unit_value_handle.h