v1.3.0

1.3.0

Math Tree

• Important change: MathNode is now a class of MathExpression interface.
  Compared to MathNode, MathExpression may return null in calc() method.
• New: getUsedVariables() method for MathExpression and MathNode.
  This method goes down the math tree to find any uses of MathVariable
  and returns names of all variables.
• New: MathExpression object family - MathComparison:
  • MathComparisonEquation (=)
  • MathComparisonGreater (>)
  • MathComparisonLess (<)

Parsing

• New: MathNodeExpression.fromStringExtended() method allows you to
  interpret equations and comparisons. Compared to fromString,
  it returns MathExpression instead of MathNode, since comparisons
  can't guarantee result.
• New: MathNodeExpression.getPotentialVariableNames() analyzes given
  math expression string for possible use of variables. Refer to
  documentation for rough edges before using it.
• New: MathNodeExpression.builtInVariables gives a list of built-in
  predefined variable names.
• New: MathNodeExpression.isVariableNameValid() lets you check if
  the parser can work with a given name.

Misc.

• Changed input parameters type for CantProcessExpressionException.
• Small documentation fixes.