public class atom extends DefaultInternalAction
Internal action: .atom
.
Description: checks whether the argument is an atom (a structure with arity 0), for example "p". Numbers, strings, and free variables are not atoms.
Parameters:
Examples:
.atom(b(10))
: false.
.atom(b)
: true.
.atom(~b)
: false.
.atom(10)
: false.
.atom("home page")
: false.
.atom(X)
: only true if X is bound to an atom.
.atom(a(X))
: false.
.atom(a[X])
: false.
.atom([a,b,c])
: false.
.atom([a,b,c(X)])
: false.
Constructor and Description |
---|
atom() |
Modifier and Type | Method and Description |
---|---|
static InternalAction |
create() |
java.lang.Object |
execute(TransitionSystem ts,
Unifier un,
Term[] args)
Executes the internal action.
|
int |
getMaxArgs() |
int |
getMinArgs() |
canBeUsedInContext, checkArguments, destroy, prepareArguments, suspendIntention
public static InternalAction create()
public int getMinArgs()
getMinArgs
in class DefaultInternalAction
public int getMaxArgs()
getMaxArgs
in class DefaultInternalAction
public java.lang.Object execute(TransitionSystem ts, Unifier un, Term[] args) throws java.lang.Exception
InternalAction
execute
in interface InternalAction
execute
in class DefaultInternalAction
java.lang.Exception