org.extex.unit.etex.register.count
Class Lastnodetype

java.lang.Object
  org.extex.interpreter.type.AbstractCode
      org.extex.unit.tex.register.count.AbstractReadonlyCount
          org.extex.unit.etex.register.count.Lastnodetype

All Implemented Interfaces:

java.io.Serializable, CountConvertible, Code, Theable

public class Lastnodetype
extends AbstractReadonlyCount

This class provides an implementation for the primitive \lastnodetype.

The Primitive \lastnodetype

The primitive \lastnodetype inspects the last node in the typesetter and returns a count value according to the node type found. The following table shows the values returned:

-1	no node; i.e. the list is empty
0	char node
1	hlist node
2	vlist node
3	rule node
4	insertion node
5	mark node
6	adjust node
7	ligature node
8	discretionary node
9	whatsit node
10	math node
11	glue node
12	kern node
13	penalty node
14	unset node (not used in ExTeX)
15	math mode nodes

Syntax

The formal description of this primitive is the following:

    ⟨lastnodetype⟩
       → \lastnodetype  

Examples

    \count42=\lastnodetype  

    Test\the\lastnodetype  

Version:

$Revision: 4732 $

Author:

Gerd Neugebauer, Sebastian Waschik

See Also:

Serialized Form

Constructor Summary

Lastnodetype(CodeToken token)
Creates a new object.

Method Summary

long	convertCount(Context context, TokenSource source, Typesetter typesetter) This method converts a register into a count.

Methods inherited from class org.extex.unit.tex.register.count.AbstractReadonlyCount

execute, the

Methods inherited from class org.extex.interpreter.type.AbstractCode

getLocalizer, getName, getToken, isIf, isOuter, readResolve, toString, toText, toText

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

Lastnodetype

public Lastnodetype(CodeToken token)

Creates a new object.

Parameters:

token - the initial token for the primitive

Method Detail

convertCount

public long convertCount(Context context,
                         TokenSource source,
                         Typesetter typesetter)
                  throws HelpingException,
                         TypesetterException

This method converts a register into a count. It might be necessary to read further tokens to determine which value to use. For instance an additional register number might be required. In this case the additional arguments Context and TokenSource can be used.

Parameters:

context - the interpreter context

source - the source for new tokens

typesetter - the typesetter to use for conversion

Returns:

the converted value

Throws:

HelpingException - in case of an error

TypesetterException - in case of an error in the typesetter

See Also:

CountConvertible.convertCount( org.extex.interpreter.context.Context, org.extex.interpreter.TokenSource, org.extex.typesetter.Typesetter)