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公共成员函数 | 私有成员函数 | Private Attributes | 所有成员列表

ResultMemT< T > Class Template Reference Data Types

#include <resultbase.h>

详细描述

template<typename T>
class maxon::ResultMemT< T >

ResultMemT can be used as return type of functions which normally return a T, but might fail only due to an out-of-memory situation and indicate this by the null value of T. The typical use-case is for pointers or strong/unique references. You can't use ResultMemT when the null value of T shall be a legal return value of the function, in that case you have to use Result .

另请参阅
ResultMem
ResultPtr

公共成员函数

  ResultMemT ()
MAXON_IMPLICIT   ResultMemT ( ERROR_FAILED )
MAXON_IMPLICIT   ResultMemT (const T &value)
MAXON_IMPLICIT   ResultMemT (T &&value)
MAXON_IMPLICIT   ResultMemT ( ERROR_OK )
MAXON_IMPLICIT   ResultMemT ( ResultOk < void >)
  ResultMemT (const ResultMemT &)=default
ResultMemT &  operator= (const ResultMemT &)=default
  ResultMemT ( ResultMemT &&)=default
ResultMemT &  operator= ( ResultMemT &&)=default
template<typename T2 , typename = typename std::enable_if<STD_IS_REPLACEMENT(constructible, T, T2*) && STD_IS_REPLACEMENT(pointer, T)>::type>
MAXON_IMPLICIT   ResultMemT (const ResultMemT < T2 * > &result)
template<typename T2 , typename = typename std::enable_if<STD_IS_REPLACEMENT(constructible, T, T2*) && STD_IS_REPLACEMENT(pointer, T)>::type>
MAXON_IMPLICIT   ResultMemT ( ResultMemT < T2 * > &&result)
template<typename T2 , typename = typename std::enable_if<STD_IS_REPLACEMENT(constructible, T, T2) && STD_IS_REPLACEMENT(pointer, T) == STD_IS_REPLACEMENT(pointer, T2)>::type>
MAXON_IMPLICIT   ResultMemT (const ResultMemT < T2 > &result)
template<typename T2 , typename = typename std::enable_if<STD_IS_REPLACEMENT(constructible, T, T2) && STD_IS_REPLACEMENT(pointer, T) == STD_IS_REPLACEMENT(pointer, T2)>::type>
MAXON_IMPLICIT   ResultMemT ( ResultMemT < T2 > &&result)
template<typename T2 >
MAXON_IMPLICIT   ResultMemT (const ResultRef < T2 > &result)
Bool   operator== ( ERROR_OK ok) const
Bool   operator== ( ERROR_FAILED failed) const
const T &  GetValue () const &
const T &  UncheckedGetValue () const &
  MAXON_MEMBER_ACCESSORS (T, GetValue )
  MAXON_MEMBER_ACCESSORS (T, UncheckedGetValue )
T  GetPointer () const

私有成员函数

Bool   IsOK (const std::false_type *) const
Bool   IsOK (const void *) const

Private Attributes

T  _value

构造函数 & 析构函数文档编制

◆  ResultMemT() [1/13]

ResultMemT ( )

◆  ResultMemT() [2/13]

MAXON_IMPLICIT ResultMemT ( ERROR_FAILED   )

◆  ResultMemT() [3/13]

MAXON_IMPLICIT ResultMemT ( const T &  value )

◆  ResultMemT() [4/13]

MAXON_IMPLICIT ResultMemT ( T &&  value )

◆  ResultMemT() [5/13]

MAXON_IMPLICIT ResultMemT ( ERROR_OK   )

◆  ResultMemT() [6/13]

MAXON_IMPLICIT ResultMemT ( ResultOk < void >  )

◆  ResultMemT() [7/13]

ResultMemT ( const ResultMemT < T > &  )
default

◆  ResultMemT() [8/13]

ResultMemT ( ResultMemT < T > &&  )
default

◆  ResultMemT() [9/13]

MAXON_IMPLICIT ResultMemT ( const ResultMemT < T2 * > &  result )

◆  ResultMemT() [10/13]

MAXON_IMPLICIT ResultMemT ( ResultMemT < T2 * > &&  result )

◆  ResultMemT() [11/13]

MAXON_IMPLICIT ResultMemT ( const ResultMemT < T2 > &  result )

◆  ResultMemT() [12/13]

MAXON_IMPLICIT ResultMemT ( ResultMemT < T2 > &&  result )

◆  ResultMemT() [13/13]

MAXON_IMPLICIT ResultMemT ( const ResultRef < T2 > &  result )

成员函数文档编制

◆  operator=() [1/2]

ResultMemT & operator= ( const ResultMemT < T > &  )
default

◆  operator=() [2/2]

ResultMemT & operator= ( ResultMemT < T > &&  )
default

◆  operator==() [1/2]

Bool operator== ( ERROR_OK   ok ) const

==(ERROR_OK)

==(ERROR_OK)

◆  operator==() [2/2]

Bool operator== ( ERROR_FAILED   failed ) const

==(ERROR_FAILED)

==(ERROR_FAILED)

◆  GetValue()

const T& GetValue ( ) const &

Returns the result value. This function must not be called when there is no value because an out-of-memory error occurred.

返回
Result 值。

◆  UncheckedGetValue()

const T& UncheckedGetValue ( ) const &

Returns the result value, or a null value in case of an out-of-memory error.

返回
Result value (null value in case of an error).

◆  MAXON_MEMBER_ACCESSORS() [1/2]

MAXON_MEMBER_ACCESSORS ( T  ,
GetValue    
)

◆  MAXON_MEMBER_ACCESSORS() [2/2]

MAXON_MEMBER_ACCESSORS ( T  ,
UncheckedGetValue    
)

◆  GetPointer()

T GetPointer ( ) const

Returns the result value. This function is only supported if T is a pointer type.

返回
Result 值。

◆  IsOK() [1/2]

Bool IsOK ( const std::false_type *  ) const
private

◆  IsOK() [2/2]

Bool IsOK ( const void *  ) const
private

Member Data Documentation

◆  _value

T _value private