math_parser 1.3.1

Process math expressions, like formulas or parts of equations, convert them to machine-readable form, and calculate them.

1.3.1

• Variable validation fix

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.

1.2.0

• Fix README.
• Moved integrating features to a separate package library math_parser_integrate.

1.1.0

• Custom variables support.
• MathFunctionXdeprecated.
• MathVariable introduced.
• You need to pass an instance of MathVariableValues instead of a num to the calc() function now.

1.0.0

• Initial version.