com.jnape.palatable.lambda.functions.builtin.fn1

Class Downcast<A extends B,B>

java.lang.Object

com.jnape.palatable.lambda.functions.builtin.fn1.Downcast<A,B>

Type Parameters:

A - the subtype

B - the supertype

All Implemented Interfaces:

Fn1<B,A>, Applicative<A,Fn1<B,?>>, Cartesian<B,A,Fn1<?,?>>, Cocartesian<B,A,Fn1<?,?>>, Contravariant<B,Profunctor<?,A,Fn1<?,?>>>, Functor<A,Fn1<B,?>>, Profunctor<B,A,Fn1<?,?>>, Monad<A,Fn1<B,?>>, MonadReader<B,A,Fn1<B,?>>, MonadRec<A,Fn1<B,?>>, MonadWriter<B,A,Fn1<B,?>>

public final class Downcast<A extends B,B>
extends Object
implements Fn1<B,A>

Covariantly cast a value of type B to a value of subtype A. Unsafe.

Method Summary

Modifier and Type	Method and Description
A	checkedApply(B b) Invoke this function with the given argument, potentially throwing any Throwable.
static <A extends B,B> Downcast<A,B>	downcast()
static <A extends B,B> A	downcast(B b)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface com.jnape.palatable.lambda.functions.Fn1

andThen, apply, carry, cartesian, censor, choose, cocartesian, compose, contraMap, diMap, diMapL, diMapR, discardL, discardR, flatMap, fmap, fn1, fromFunction, lazyZip, listens, local, pure, pureFn1, thunk, toFunction, trampolineM, widen, zip, zip

Methods inherited from interface com.jnape.palatable.lambda.monad.Monad

join

Methods inherited from interface com.jnape.palatable.lambda.functor.Functor

coerce

Method Detail

checkedApply

public A checkedApply(B b)

Description copied from interface: Fn1

Invoke this function with the given argument, potentially throwing any Throwable.

Specified by:

checkedApply in interface Fn1<B,A extends B>

Parameters:

b - the argument

Returns:

the result of the function application

downcast

public static <A extends B,B> Downcast<A,B> downcast()

downcast

public static <A extends B,B> A downcast(B b)