Package org.petitparser.utils

Class Functions

java.lang.Object

org.petitparser.utils.Functions

public class Functions
extends Object

Constructor and utility methods for functions.

Method Summary

Modifier and Type	Method	Description
static <T> Function<Object,T>	constant(T output)	Returns a function that returns a constant value.
static <T> Function<List<T>,T>	firstOfList()	Returns a function that returns the first value of a list.
static <T> Function<List<T>,T>	lastOfList()	Returns a function that returns the last value of a list.
static <T> Function<List<T>,T>	nthOfList(int index)	Returns a function that returns the value at the given index.
static <T> Function<List<T>,List<T>>	permutationOfList(int... indexes)	Returns a function that returns the permutation of a given list.
static <T> Function<List<T>,List<T>>	withoutSeparators()	Returns a function that skips the separators of a given list, see Parser.separatedBy(Parser).

Methods inherited from class java.lang.Object

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

Method Detail

firstOfList

public static <T> Function<List<T>,T> firstOfList()

Returns a function that returns the first value of a list.

lastOfList

public static <T> Function<List<T>,T> lastOfList()

Returns a function that returns the last value of a list.

nthOfList

public static <T> Function<List<T>,T> nthOfList(int index)

Returns a function that returns the value at the given index. Negative indexes are counted from the end of the list.

permutationOfList

public static <T> Function<List<T>,List<T>> permutationOfList(int... indexes)

Returns a function that returns the permutation of a given list. Negative indexes are counted from the end of the list.

withoutSeparators

public static <T> Function<List<T>,List<T>> withoutSeparators()

Returns a function that skips the separators of a given list, see Parser.separatedBy(Parser).

constant

public static <T> Function<Object,T> constant(T output)

Returns a function that returns a constant value.