org.extex.interpreter.primitives.register.real
Class MathExpression

java.lang.Object
  org.extex.interpreter.type.AbstractCode
      org.extex.interpreter.primitives.register.real.AbstractMath
          org.extex.interpreter.primitives.register.real.MathExpression

All Implemented Interfaces:

java.io.Serializable, CountConvertible, RealConvertible, Code, Theable

public class MathExpression
extends AbstractMath
implements Theable, RealConvertible, CountConvertible

Math. Expressions to get a real-value. It uses the JEval http://jeval.sourceforge.net/.

Example

 \mathexpr{2*7}
 \real7=\mathexpr{7+4-2*3}
 \count99=\mathexpr{7+4-2*3}
 

Version:

$Revision: 6447 $

Author:

Michael Niedermair

See Also:

Serialized Form

Constructor Summary

MathExpression(CodeToken token)
Creates a new object.

Method Summary

protected Real

calculate(Context context, TokenSource source, Typesetter typesetter) Calculate

Methods inherited from class org.extex.interpreter.primitives.register.real.AbstractMath

convertCount, convertReal, 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

Methods inherited from interface org.extex.interpreter.type.Theable

the

Methods inherited from interface org.extex.interpreter.primitives.register.real.RealConvertible

convertReal

Methods inherited from interface org.extex.interpreter.parser.CountConvertible

convertCount

Constructor Detail

MathExpression

public MathExpression(CodeToken token)

Creates a new object.

Parameters:

token - the initial token for the primitive

Method Detail

calculate

protected Real calculate(Context context,
                         TokenSource source,
                         Typesetter typesetter)
                  throws HelpingException,
                         TypesetterException

Calculate

Specified by:

calculate in class AbstractMath

Parameters:

context - the context

source - the token source

typesetter - the typesetter

Returns:

the real value

Throws:

HelpingException - in case of an error

TypesetterException - in case of an error in the typesetter

See Also:

AbstractMath.calculate( org.extex.interpreter.context.Context, org.extex.interpreter.TokenSource, org.extex.typesetter.Typesetter)