scalaz
Maybe
Related Docs:
class Maybe
|
package scalaz
object
Maybe
extends
MaybeInstances
Source
Maybe.scala
Linear Supertypes
MaybeInstances
,
MaybeInstances0
,
MaybeInstances1
,
AnyRef
,
Any
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By Inheritance
Inherited
Maybe
MaybeInstances
MaybeInstances0
MaybeInstances1
AnyRef
Any
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Type Members
final
case class
Empty
[
A
]
()
extends
Maybe
[
A
] with
Product
with
Serializable
final
case class
Just
[
A
]
(
a:
A
)
extends
Maybe
[
A
] with
Product
with
Serializable
Value Members
final
def
!=
(
arg0:
Any
)
:
Boolean
Definition Classes
AnyRef → Any
final
def
##
()
:
Int
Definition Classes
AnyRef → Any
final
def
==
(
arg0:
Any
)
:
Boolean
Definition Classes
AnyRef → Any
final
def
asInstanceOf
[
T0
]
:
T0
Definition Classes
Any
def
clone
()
:
AnyRef
Attributes
protected[
java.lang
]
Definition Classes
AnyRef
Annotations
@throws
(
...
)
final
def
empty
[
A
]
:
Maybe
[
A
]
final
def
eq
(
arg0:
AnyRef
)
:
Boolean
Definition Classes
AnyRef
def
equals
(
arg0:
Any
)
:
Boolean
Definition Classes
AnyRef → Any
def
finalize
()
:
Unit
Attributes
protected[
java.lang
]
Definition Classes
AnyRef
Annotations
@throws
(
classOf[java.lang.Throwable]
)
final
def
fromNullable
[
A
]
(
a:
A
)
:
Maybe
[
A
]
Wrap a value in Just, or return Empty if the value is null
final
def
fromOption
[
A
]
(
oa:
Option
[
A
]
)
:
Maybe
[
A
]
def
fromTryCatchNonFatal
[
T
]
(
a: ⇒
T
)
:
Maybe
[
T
]
def
fromTryCatchThrowable
[
T
,
E <:
Throwable
]
(
a: ⇒
T
)
(
implicit
nn:
NotNothing
[
E
]
,
ex:
ClassTag
[
E
]
)
:
Maybe
[
T
]
final
def
getClass
()
:
Class
[_]
Definition Classes
AnyRef → Any
def
hashCode
()
:
Int
Definition Classes
AnyRef → Any
final
def
isInstanceOf
[
T0
]
:
Boolean
Definition Classes
Any
final
def
just
[
A
]
(
a:
A
)
:
Maybe
[
A
]
implicit
def
maybeBand
[
A
]
(
implicit
arg0:
Band
[
A
]
)
:
Band
[
Maybe
[
A
]]
Definition Classes
MaybeInstances1
implicit
def
maybeEqual
[
A
]
(
implicit
arg0:
Equal
[
A
]
)
:
Equal
[
Maybe
[
A
]]
Definition Classes
MaybeInstances
implicit
def
maybeFirstMonad
:
Monad
[
FirstMaybe
]
Definition Classes
MaybeInstances
implicit
def
maybeFirstMonoid
[
A
]
:
Monoid
[
FirstMaybe
[
A
]] with
Band
[
FirstMaybe
[
A
]]
Definition Classes
MaybeInstances
implicit
def
maybeFirstOrder
[
A
]
(
implicit
A:
Order
[
Maybe
[
A
]]
)
:
Order
[
FirstMaybe
[
A
]]
Definition Classes
MaybeInstances
implicit
def
maybeFirstShow
[
A
]
(
implicit
A:
Show
[
Maybe
[
A
]]
)
:
Show
[
FirstMaybe
[
A
]]
Definition Classes
MaybeInstances
implicit
val
maybeInstance
:
Traverse
[
Maybe
] with
MonadPlus
[
Maybe
] with
BindRec
[
Maybe
] with
Cozip
[
Maybe
] with
Zip
[
Maybe
] with
Unzip
[
Maybe
] with
Align
[
Maybe
] with
IsEmpty
[
Maybe
] with
Cobind
[
Maybe
] with
Optional
[
Maybe
]
Definition Classes
MaybeInstances
implicit
def
maybeLastMonad
:
Monad
[
LastMaybe
]
Definition Classes
MaybeInstances
implicit
def
maybeLastMonoid
[
A
]
:
Monoid
[
LastMaybe
[
A
]] with
Band
[
LastMaybe
[
A
]]
Definition Classes
MaybeInstances
implicit
def
maybeLastOrder
[
A
]
(
implicit
A:
Order
[
Maybe
[
A
]]
)
:
Order
[
LastMaybe
[
A
]]
Definition Classes
MaybeInstances
implicit
def
maybeLastShow
[
A
]
(
implicit
A:
Show
[
Maybe
[
A
]]
)
:
Show
[
LastMaybe
[
A
]]
Definition Classes
MaybeInstances
implicit
def
maybeMax
[
A
]
(
implicit
o:
Order
[
A
]
)
:
Monoid
[
MaxMaybe
[
A
]] with
Band
[
MaxMaybe
[
A
]]
Definition Classes
MaybeInstances
implicit
def
maybeMaxMonad
:
Monad
[
MaxMaybe
]
Definition Classes
MaybeInstances
implicit
def
maybeMaxOrder
[
A
]
(
implicit
arg0:
Order
[
A
]
)
:
Order
[
MaxMaybe
[
A
]]
Definition Classes
MaybeInstances
implicit
def
maybeMaxShow
[
A
]
(
implicit
arg0:
Show
[
A
]
)
:
Show
[
MaxMaybe
[
A
]]
Definition Classes
MaybeInstances
implicit
def
maybeMin
[
A
]
(
implicit
o:
Order
[
A
]
)
:
Monoid
[
MinMaybe
[
A
]] with
Band
[
MinMaybe
[
A
]]
Definition Classes
MaybeInstances
implicit
def
maybeMinMonad
:
Monad
[
MinMaybe
]
Definition Classes
MaybeInstances
implicit
def
maybeMinOrder
[
A
]
(
implicit
arg0:
Order
[
A
]
)
:
Order
[
MinMaybe
[
A
]]
Definition Classes
MaybeInstances
implicit
def
maybeMinShow
[
A
]
(
implicit
arg0:
Show
[
A
]
)
:
Show
[
MinMaybe
[
A
]]
Definition Classes
MaybeInstances
implicit
def
maybeMonoid
[
A
]
(
implicit
arg0:
Semigroup
[
A
]
)
:
Monoid
[
Maybe
[
A
]]
Definition Classes
MaybeInstances
implicit
def
maybeOrder
[
A
]
(
implicit
arg0:
Order
[
A
]
)
:
Order
[
Maybe
[
A
]]
Definition Classes
MaybeInstances
implicit
def
maybeSemiLattice
[
A
]
(
implicit
A:
SemiLattice
[
A
]
)
:
SemiLattice
[
Maybe
[
A
]]
Definition Classes
MaybeInstances0
implicit
def
maybeShow
[
A
]
(
implicit
A:
Show
[
A
]
)
:
Show
[
Maybe
[
A
]]
Definition Classes
MaybeInstances
final
def
ne
(
arg0:
AnyRef
)
:
Boolean
Definition Classes
AnyRef
final
def
notify
()
:
Unit
Definition Classes
AnyRef
final
def
notifyAll
()
:
Unit
Definition Classes
AnyRef
val
optionMaybeIso
:
Isomorphism.<~>
[
Option
,
Maybe
]
final
def
synchronized
[
T0
]
(
arg0: ⇒
T0
)
:
T0
Definition Classes
AnyRef
def
toString
()
:
String
Definition Classes
AnyRef → Any
final
def
wait
()
:
Unit
Definition Classes
AnyRef
Annotations
@throws
(
...
)
final
def
wait
(
arg0:
Long
,
arg1:
Int
)
:
Unit
Definition Classes
AnyRef
Annotations
@throws
(
...
)
final
def
wait
(
arg0:
Long
)
:
Unit
Definition Classes
AnyRef
Annotations
@throws
(
...
)
Inherited from
MaybeInstances
Inherited from
MaybeInstances0
Inherited from
MaybeInstances1
Inherited from
AnyRef
Inherited from
Any
Ungrouped