Function math_utils_lib::quick_eval

pub fn quick_eval(
    expr: String,
    vars: Vec<Variable>
) -> Result<Value, QuickEvalError>

evaluates a given expression using the given variables (e and pi are provided by the function). If you just want the Binary Tree, have a look at parse().

Examples

let res = quick_eval("3*3".to_string(), vec![])?;

assert_eq!(res, Value::Scalar(9.));

let x = Variable {
    name: "x".to_string(),
    value: Value::Scalar(3.)
};
let res = quick_eval("3x".to_string(), vec![x])?;

assert_eq!(res, Value::Scalar(9.));