Package hydra.lib.sets

Class IsEmpty

java.lang.Object

hydra.tools.PrimitiveFunction

hydra.lib.sets.IsEmpty

public class IsEmpty
extends PrimitiveFunction

Checks if a set is empty.

Constructor Summary

Constructors

Constructor	Description
IsEmpty()

Method Summary

Modifier and Type	Method	Description
static <X> Boolean	apply(Set<X> arg)	Checks if a set is empty.
protected Function<List<Term>,Flow<Graph,Term>>	implementation()	Provides the implementation of this primitive function.
Name	name()	Returns the name of this primitive function.
TypeScheme	type()	Returns the type scheme of this function.

Methods inherited from class hydra.tools.PrimitiveFunction

term, toNative

Methods inherited from class java.lang.Object

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

Constructor Details

IsEmpty

public IsEmpty()

Method Details

name

public Name name()

Returns the name of this primitive function.

Specified by:

name in class PrimitiveFunction

Returns:

the name "hydra.lib.sets.isEmpty"

type

public TypeScheme type()

Returns the type scheme of this function.

Specified by:

type in class PrimitiveFunction

Returns:

the type scheme for a function that checks if a set is empty

implementation

protected Function<List<Term>,Flow<Graph,Term>> implementation()

Provides the implementation of this primitive function.

Specified by:

implementation in class PrimitiveFunction

Returns:

a function that transforms terms to a flow of graph and term

apply

public static <X> Boolean apply(Set<X> arg)

Checks if a set is empty.

Type Parameters:

X - the type of elements in the set

Parameters:

arg - the set to check

Returns:

true if the set is empty, false otherwise