de.dante.extex.interpreter.primitives.math
Class Mathchoice

java.lang.Object
  de.dante.extex.interpreter.type.AbstractCode
      de.dante.extex.interpreter.primitives.math.AbstractMathCode
          de.dante.extex.interpreter.primitives.math.Mathchoice

All Implemented Interfaces:

Code, Localizable, java.io.Serializable

public class Mathchoice

extends AbstractMathCode

This class provides an implementation for the primitive \mathchoice.

The Math Primitive \mathchoice

The math primitive \mathchoice provides a switch on the current style of math processing. The math processing is in one of the styles display, text, script, and scriptscript. The math styles influence the size of the typeset material and the spacing. The primitive can be used to insert some material depending on the current math style.

For each of the styles the material to be used must be given. The current style determines which material should be expanded. The material for the other styles is discarded.

The material is enclosed in braces – or to be precise in tokens with the catcodes 1 (left brace) and 2 (right brace). The four cases lead to four groups.

Outside the math mode the primitive raises an error.

Syntax

    ⟨mathchoice⟩
       → \mathchoice {⟨display material⟩}{⟨text material⟩}{⟨script material⟩}{⟨scriptscript material⟩} 

Examples

    \mathchoice{d}{t}{s}{ss}  

Version:

$Revision: 1.18 $

Author:

Gerd Neugebauer

See Also:

Serialized Form

serialVersionUID

protected static final long serialVersionUID

The constant serialVersionUID contains the id for serialization.

See Also:

Constant Field Values

Mathchoice

public Mathchoice(java.lang.String name)

Creates a new object.

Parameters:

name - the name for tracing and debugging

execute

public void execute(Flags prefix,
                    Context context,
                    TokenSource source,
                    Typesetter typesetter)
             throws InterpreterException

Description copied from interface: Code

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

Throws:

InterpreterException

See Also:

Code.execute( de.dante.extex.interpreter.Flags, de.dante.extex.interpreter.context.Context, de.dante.extex.interpreter.TokenSource, de.dante.extex.typesetter.Typesetter)