A Kotlin/Java based mathematical expression solver. Supports custom operators, variables, and functions.
For basic parsing, simply construct a Value() object with the expression to solve as the parameter. Then, call the resolve() function in order to begin parsing.
val expression = Value("2(1/2)+3")
val floatValue = expression.resolve() // or call resolve() and use expression.resolvedValue
To perform more advanced parsing, you must use the ExpressionEnvironment class as your parser. First, create a new expression environment as so
val environment = ExpressionEnvironment()
Each environment instance has its own set of variables and functions. These can be set by using the putVar() and putFunction() methods respectively. The parsing itself is done using the ExpressionEnvironment.parseAndPrint(expression). In expressions, variables are defined using !x=<expr> and functions are defined using !f(x)=<expr>. They can be retrieved using ?x and ?f(x) respectively. Expressions can utilize these variables and functions by simplying calling on them. I.e. x*2 and f(2)*2
val env = ExpressionEnvironment()
env.parseAndPrint("!g=2") // define variable x
env.parseAndPrint("!f(x)=x^2") // define function f(x)
env.parseAndPrint("f(g)") // parse f(g) = (2)^2