## org.extex.unit.tex.math.fraction Class Over

java.lang.Object
org.extex.interpreter.type.AbstractCode
org.extex.unit.tex.math.AbstractMathCode
org.extex.unit.tex.math.fraction.Over

All Implemented Interfaces:
java.io.Serializable, Code

public class Overextends AbstractMathCode

This class provides an implementation for the primitive \over.

### The Math Primitive \over

The math primitive \over arranges that the material in the math group before it is typeset above the material after the primitive. The two parts are separated by a line of the default width which is taken from the font parameters. If the width is less than 0pt then no rule is drawn but the given height is left blank.

If several primitives of type \above, \abovewithdelims, \atop, \atopwithdelims, \over, or \overwithdelims are encountered in the same math group then the result is ambiguous and an error is raised.

If the primitive is used outside of math mode then an error is raised.

#### Syntax

The formal description of this primitive is the following:
    ⟨over⟩
→ ⟨math material⟩ \over ⟨math material⟩  

#### Examples

    {a \over b}

Version:
$Revision: 4732$
Author:
Gerd Neugebauer
Serialized Form

Field Summary
protected static long serialVersionUID
The constant serialVersionUID contains the id for serialization.

Constructor Summary
Over(CodeToken token)
Creates a new object.

Method Summary
 void execute(Flags prefix, Context context, TokenSource source, Typesetter typesetter)
This method takes the first token and executes it. The result is placed on the stack. This operation might have side effects. To execute a token it might be necessary to consume further tokens.

Methods inherited from class org.extex.unit.tex.math.AbstractMathCode
getListMaker

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

Field Detail

### serialVersionUID

protected static final long serialVersionUID
The constant serialVersionUID contains the id for serialization.

Constant Field Values
Constructor Detail

### Over

public Over(CodeToken token)
Creates a new object.

Parameters:
token - the initial token for the primitive
Method Detail

### execute

public void execute(Flags prefix,
Context context,
TokenSource source,
Typesetter typesetter)
throws HelpingException,
ConfigurationException,
TypesetterException
This method takes the first token and executes it. The result is placed on the stack. This operation might have side effects. To execute a token it might be necessary to consume further tokens.

Specified by:
execute in interface Code
Overrides:
execute in class AbstractCode
Parameters:
prefix - the prefix controlling the execution
context - the interpreter context
source - the token source
typesetter - the typesetter
Throws:
HelpingException - in case of an error
ConfigurationException - in case of an configuration error
TypesetterException - in case of an error in the typesetter
AbstractCode.execute( org.extex.interpreter.Flags, org.extex.interpreter.context.Context, org.extex.interpreter.TokenSource, org.extex.typesetter.Typesetter)