org.extex.base.parser
Class ConstantMudimenParser

java.lang.Object
  org.extex.base.parser.ConstantMudimenParser

All Implemented Interfaces:

Parser<Mudimen>

public class ConstantMudimenParser
extends java.lang.Object
implements Parser<Mudimen>

This class provides a parser for math units (mu).

Version:

$Revision:4399 $

Author:

Gerd Neugebauer

Field Summary

protected static long

serialVersionUID The constant serialVersionUID contains the id for serialization.

Constructor Summary

ConstantMudimenParser()

Method Summary

Mudimen	parse(Context context, TokenSource source, Typesetter typesetter) Creates a new object and fills it from a token stream.
protected static long	scanMu(Context context, TokenSource source, Typesetter typesetter) Scan a math unit.

Methods inherited from class java.lang.Object

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

Field Detail

serialVersionUID

protected static final long serialVersionUID

The constant serialVersionUID contains the id for serialization.

See Also:

Constant Field Values

Constructor Detail

ConstantMudimenParser

public ConstantMudimenParser()

Method Detail

scanMu

protected static long scanMu(Context context,
                             TokenSource source,
                             Typesetter typesetter)
                      throws HelpingException,
                             TypesetterException

Scan a math unit.

Parameters:

context - the processor context

source - the source for new tokens

typesetter - the typesetter

Returns:

the number of scaled points for the mu

Throws:

HelpingException - in case of an error

TypesetterException - in case of an error in the typesetter

parse

public Mudimen parse(Context context,
                     TokenSource source,
                     Typesetter typesetter)
              throws HelpingException,
                     TypesetterException

Creates a new object and fills it from a token stream. This method parses the following syntactic entity:

    ⟨mudimen⟩
      → ⟨float⟩ mu
       |  ⟨mudimen variable⟩
 

The value of ⟨mudimen⟩ is either a floating point number followed by the unit mu or a variable value resulting in a mudimen value.

Specified by:

parse in interface Parser<Mudimen>

Parameters:

context - the processor context

source - the source for new tokens

typesetter - the typesetter

Returns:

the new object

Throws:

HelpingException - in case of an error

TypesetterException - in case of an error in the typesetter in case of an error in the typesetter

See Also:

Parser.parse( org.extex.interpreter.context.Context, org.extex.interpreter.TokenSource, org.extex.typesetter.Typesetter)