com.waveset.expression
Class ExFunction.f_length

java.lang.Object
  extended bycom.waveset.expression.ExNode
      extended bycom.waveset.expression.ExFunction.f_length
All Implemented Interfaces:
com.sun.idm.debugger.common.Locatable
Enclosing class:
ExFunction

public static class ExFunction.f_length
extends ExNode

The function node for the <length> expression.

We expect one argument which may be either a list or a string. We return the length of the string, or the number of elements in the list.


Field Summary
 
Fields inherited from class com.waveset.expression.ExNode
_bindingCount, _children, _decoration, _parent, code_id, trace
 
Constructor Summary
ExFunction.f_length()
           
 
Method Summary
protected  ExValue evalInternal(ExState state)
          Return the length of a string or list.
 java.lang.String getFunctionName()
          Nodes representing functions must have a name.
 
Methods inherited from class com.waveset.expression.ExNode
addChild, addChildren, addCommonAttributes, beginTrace, clearOwner, endTrace, eval, evalChild, evalChildToObject, evalChildToString, evalToBoolean, evalToInt, evalToObject, evalToString, getBindingCount, getChild, getChildren, getDecoration, getHiddenVariable, getLocation, getOwner, getParent, isLiteral, parseCommonAttributes, parseXml, postProcess, removeChild, resolveFunction, resolveVariable, setBindingCount, setChildren, setDecoration, setEnvironment, setLocation, setOwner, setOwner, setParent, toXml, toXml, toXml, toXmlAttributes, toXmlChildren
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

ExFunction.f_length

public ExFunction.f_length()
Method Detail

getFunctionName

public java.lang.String getFunctionName()
Description copied from class: ExNode
Nodes representing functions must have a name. This name is used in the formatting of default trace messages and the default XML rendering. If a node doesn't have a name for some reason, or needs more control over the trace messges and XML, they must overload beginTrace, endTrace, and toXml below.

Specified by:
getFunctionName in class ExNode

evalInternal

protected ExValue evalInternal(ExState state)
                        throws WavesetException
Return the length of a string or list.

Specified by:
evalInternal in class ExNode
Throws:
WavesetException