PushEvaluator

All Known Implementing Classes:

MergeInstrAdjunct.MergePusher

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.
```
@FunctionalInterface
public interface PushEvaluator
```

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`TailCall`	`processLeavingTail(Outputter out, XPathContext context)`	Evaluate a construct in push mode, sending the value of the construct to a supplied outputter

- Method Detail
  - processLeavingTail
```
TailCall processLeavingTail(Outputter out,
                            XPathContext context)
                     throws XPathException
```
    Evaluate a construct in push mode, sending the value of the construct to a supplied outputter
    
    Parameters:
    
    out - the outputter to which the result should be sent
    
    context - the evaluation context
    
    Returns:
    
    either a TailCall or null. A TailCall represents unfinished work that must be completed by the caller. Specifically, if a non-null value is returned, the caller must either complete the evaluation by evaluating tail calls until null is returned (which can be conveniently achieved by calling Expression.dispatchTailCall(TailCall), or it must return the TailCall to its own caller
    
    Throws:
    
    XPathException - if a dynamic error occurs during the evaluation.