Constructor Detail

• MAssign

  public MAssign()

Method Detail

• run

  public void run(Stack s)
           throws ParseException

  The run method should not be called. Use evaluate(org.lsmp.djep.matrixJep.nodeTypes.MatrixNodeI, org.lsmp.djep.matrixJep.MatrixEvaluator, org.lsmp.djep.matrixJep.MatrixJep) instead.

  Specified by:

  run in interface PostfixMathCommandI

  Overrides:

  run in class PostfixMathCommand

  Throws:

  ParseException

• evaluate

  public MatrixValueI evaluate(MatrixNodeI node,
                               MatrixEvaluator visitor,
                               MatrixJep j)
                        throws ParseException

  A special methods for evaluating an assignment. When an assignment is encountered, first evaluate the rhs. Then set the value of the lhs to the result.

  Specified by:

  evaluate in interface MatrixSpecialEvaluationI

  Parameters:

  node - The top node.

  visitor - The parser visitor

  j - The current MatrixJep instance.

  Returns:

  Value after evaluation.

  Throws:

  ParseException

• preprocess

  public MatrixNodeI preprocess(ASTFunNode node,
                                MatrixPreprocessor visitor,
                                MatrixJep mjep,
                                MatrixNodeFactory nf)
                         throws ParseException

  Description copied from interface: SpecialPreProcessorI
  Subverts the preprocessing stage. Preprocessing performs a number of operations:

  1. Converts each node into one of the subtypes of MatrixNodeI
  2. Calculate the dimensions for the results
  3. Performs any special symbolic operations such as differentation

  In general the first step in preprocessing is to run the preprocessor on the children of the node. This can be done using

   MatrixNodeI children[] = visitor.visitChildrenAsArray(node,null);
   

  The final step is to construct a node of the correct type. The MatrixNodeFactory argument has a number of methods to do this. For example

   return (ASTMFunNode) nf.buildOperatorNode(node.getOperator(),children,rhsDim);
   

  Note how the dimension is specified.

  Specified by:

  preprocess in interface SpecialPreProcessorI

  Parameters:

  node - the top node of the tree representing the function and its arguments.

  visitor - A reference to the preprocessing visitor.

  mjep - A reference of the MatrixJep instance.

  nf - A reference to the node factory object.

  Returns:

  A new MatrixNodeI representing the converted function.

  Throws:

  ParseException - if some error occurs.