GetCode

java.lang.Object
- org.projog.core.predicate.AbstractSingleResultPredicate
- - org.projog.core.predicate.builtin.io.GetCode

All Implemented Interfaces:

KnowledgeBaseConsumer, PredicateFactory
```
public final class GetCode
extends AbstractSingleResultPredicate
```
get_code(X) - reads the next character from the input stream.
The goal succeeds if X can be unified with next character read from the current input stream. Succeeds only once and the operation of moving to the next character is not undone on backtracking.

If there are no more characters to read from the current input stream (i.e. if the end of the stream has been reached) then an attempt is made to unify X with the value -1.

- Constructor Summary
  
  Constructors
  Constructor Description
  
  GetCode()
- Method Summary
  
  All Methods Instance Methods Concrete Methods
  Modifier and Type Method Description
  
  protected boolean evaluate(Term argument)
  - Methods inherited from class org.projog.core.predicate.AbstractSingleResultPredicate
    evaluate, evaluate, evaluate, evaluate, evaluate, getArithmeticOperators, getFileHandles, getKnowledgeBase, getOperands, getPredicate, getPredicates, getProjogListeners, getSpyPoints, getTermFormatter, init, isRetryable, setKnowledgeBase
  - Methods inherited from class java.lang.Object
    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
  - Methods inherited from interface org.projog.core.predicate.PredicateFactory
    isAlwaysCutOnBacktrack

- Constructor Detail
  - GetCode
```
public GetCode()
```
- Method Detail
  - evaluate
```
protected boolean evaluate(Term argument)
```
    Overrides:
    
    evaluate in class AbstractSingleResultPredicate