bdlar::NullableValueRef Class Reference

#include <bdlar_nullablevalueref.h>

Public Types
typedef bdlat_TypeCategory::NullableValue	CategoryTag

Public Member Functions
template<class t_NULLABLE >
	NullableValueRef (t_NULLABLE &nullable, typename bsl::enable_if< IsNullable< t_NULLABLE >::value >::type *=0)
	NullableValueRef (void *objectAddress, const NullableValueVtable *vtable)
void	makeValue () const
template<class t_MANIPULATOR >
int	manipulateValue (t_MANIPULATOR &manipulator) const
void	reset () const
template<class t_ACCESSOR >
int	accessValue (t_ACCESSOR &accessor) const
const NullableValueVtable *	vtable () const
bool	isNull () const
void *	objectAddress () const
bdlat_TypeCategory::Value	valueCategory () const

Member Typedef Documentation

CategoryTag

typedef bdlat_TypeCategory::NullableValue bdlar::NullableValueRef::CategoryTag

Constructor & Destructor Documentation

NullableValueRef() [1/2]

template<class t_NULLABLE >

bdlar::NullableValueRef::NullableValueRef ( t_NULLABLE &  nullable, typename bsl::enable_if< IsNullable< t_NULLABLE >::value >::type *  = 0  )

inlineexplicit

Create NullableValueRef object that type erases the supplied nullable object.

NullableValueRef() [2/2]

bdlar::NullableValueRef::NullableValueRef ( void *  objectAddress, const NullableValueVtable *  vtable  )

inline

Create NullableValueRef object.

Precondition

The behaviour is undefined unless objectAddress and vtable point to the valid objects.

Member Function Documentation

accessValue()

template<class t_ACCESSOR >

int bdlar::NullableValueRef::accessValue ( t_ACCESSOR &  accessor ) const

inline

Invoke the specified accessor on the referred non-null value. The supplied accessor must be a callable type that can be called as if it had the following signature:

int accessor(const VALUE& refOrValue);

Return the value from the invocation of accessor.

Precondition

The behavior is undefined if the referred object is null.

isNull()

bool bdlar::NullableValueRef::isNull ( ) const

inline

Return true if the referred object contains a null value, and false otherwise.

makeValue()

void bdlar::NullableValueRef::makeValue ( ) const

inline

Assign to the referred object the default value for the contained type.

manipulateValue()

template<class t_MANIPULATOR >

int bdlar::NullableValueRef::manipulateValue ( t_MANIPULATOR &  manipulator ) const

inline

Invoke the specified manipulator on the referred non-null value. The supplied manipulator must be a callable type that can be called as if it had the following signature:

int manipulator(VALUE *refOrValue);

Return the value from the invocation of manipulator.

Precondition

The behavior is undefined if the referred object is null.

objectAddress()

void * bdlar::NullableValueRef::objectAddress ( ) const

inline

Return a pointer to the wrapped object.

reset()

void bdlar::NullableValueRef::reset ( ) const

inline

Reset the referred object to the default value.

valueCategory()

bdlat_TypeCategory::Value bdlar::NullableValueRef::valueCategory ( ) const

inline

Return the value type category.

vtable()

const NullableValueVtable * bdlar::NullableValueRef::vtable ( ) const

inline

Return a pointer to the vtable.

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

• bdlar_nullablevalueref.h