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java.lang.Objectubc.cs.JLog.Foundation.jGoal
ubc.cs.JLog.Builtins.Goals.jCallGoal
ubc.cs.JLog.Builtins.Goals.jCallNGoal
public class jCallNGoal
Field Summary |
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Fields inherited from class ubc.cs.JLog.Builtins.Goals.jCallGoal |
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callee, end_goal, unified |
Fields inherited from class ubc.cs.JLog.Foundation.jGoal |
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next |
Constructor Summary | |
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jCallNGoal(jCompoundTerm c)
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Method Summary | |
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int |
getArity()
Returns the arity of this instance. |
boolean |
prove(iGoalStack goals,
iGoalStack proved)
Attempt to prove the goal represented by this jGoal . |
java.lang.String |
toString()
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Methods inherited from class ubc.cs.JLog.Builtins.Goals.jCallGoal |
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getName, internal_remove, internal_restore, retry, setEndGoal |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Constructor Detail |
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public jCallNGoal(jCompoundTerm c)
Method Detail |
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public boolean prove(iGoalStack goals, iGoalStack proved)
jGoal
jGoal
.
Goal must not be on either stack to prove (pop off goals stack before prove call).
Goal must place itself on the appropriate stack before returning.
proved
stack if 'proved', goals
stack otherwise.
Since proved doesn't pop the stack we don't need a try/catch block.
Must be called at least once before calling retry
.
prove
in class jCallGoal
goals
- iGoalStack
containing goals yet to be proved.proved
- iGoalStack
containing evaluated goals (goals
that may already be proved, or awaiting their child goals
to be proved).
boolean
is true if this goal ended up on
proved
, false otherwise.public int getArity()
iNameArity
getArity
in interface iNameArity
getArity
in class jCallGoal
int
whose value is the arity of this instance.public java.lang.String toString()
toString
in class jCallGoal
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