Package jason.stdlib

Class type

java.lang.Object

jason.asSemantics.DefaultInternalAction

jason.stdlib.type

All Implemented Interfaces:

InternalAction, Serializable

@Manual(literal=".type(argument,type)",
        hint="retrieves types of the argument or checks whether the argument is of a given type",
        argsHint={"the term to be checked","the given type or a variable to retrieves types"},
        argsType={"term","term or variable"},
        examples={".type(\"home page\",string): true",".type(b(10),string): false",".type(b,T): unifies T with the term \'atom\' and backtracks unifying T with \'literal\' and \'ground\'",".type(X,T): unifies T with the term \'free\' if X is free, or other types if X is not free"},
        seeAlso={"jason.stdlib.atom","jason.stdlib.list","jason.stdlib.literal","jason.stdlib.number","jason.stdlib.string","jason.stdlib.structure","jason.stdlib.ground"})
public class type
extends DefaultInternalAction

Internal action: .type.

Description: retrieves types of the argument.

Parameter:

• + argument (any term): the term to be checked.
  
• +/- type (atom or variable): the given type or a variable. Values are atoms.
  

Examples:

• .type(\"home page\",string): true.
• .type(b(10),string): false.
• .type(b,T): unifies T with the term 'atom' and backtracks unifying T with 'literal' and 'ground'.
• .type(X,T): unifies T with the term 'free' if X is free, or other types if X is not free.

See Also:

• atom
• list
• literal
• number
• string
• structure
• ground
• Serialized Form

Constructor Summary

Constructors

Constructor	Description
type()

Method Summary

Modifier and Type	Method	Description
static InternalAction	create()
Object	execute(TransitionSystem ts, Unifier un, Term[] args)	Executes the internal action.
int	getMaxArgs()
int	getMinArgs()

Methods inherited from class jason.asSemantics.DefaultInternalAction

canBeUsedInContext, checkArguments, destroy, prepareArguments, suspendIntention

Methods inherited from class java.lang.Object

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

Constructor Details

type

public type()

Method Details

create

public static InternalAction create()

getMinArgs

public int getMinArgs()

Overrides:

getMinArgs in class DefaultInternalAction

getMaxArgs

public int getMaxArgs()

Overrides:

getMaxArgs in class DefaultInternalAction

execute

public Object execute(TransitionSystem ts,
 Unifier un,
 Term[] args)
               throws Exception

Description copied from interface: InternalAction

Executes the internal action. It should return a Boolean or an Iterator. A true boolean return means that the IA was successfully executed. An Iterator result means that there is more than one answer for this IA (e.g. see member internal action).

Specified by:

execute in interface InternalAction

Overrides:

execute in class DefaultInternalAction

Throws:

Exception