Struct xxcalc::polynomial_calculator::PolynomialCalculator
[−]
[src]
pub struct PolynomialCalculator;
PolynomialCalculator is a calculator using a PolynomialParser and
a PolynomialEvaluator to provide multiple default operations.
This calculator supports addition +, subtraction -, multiplication *,
division / and exponentiation ^ operators, log(number, base),
log10(number) and bind(polynomial, double) functions, x, inf, nan
symbols and pi and e constants.
While usage of the calculator is the easiest way of embedding computation
engine into your program, please note that a Tokenizer, PolynomialParser and
PolynomialEvaluator is created with each call, which requires reallocation
of memory.
Examples
assert_eq!(PolynomialCalculator.process("2+2"), Ok(Polynomial::constant(4.0))); assert_eq!(PolynomialCalculator.process("(2+2)*-2"), Ok(Polynomial::constant(-8.0))); assert_eq!(String::from(PolynomialCalculator.process("(x+1)*(-0.13x^18-x^7)").unwrap()), "-0.13x^19-0.13x^18-x^8-x^7"); assert_eq!(PolynomialCalculator.process("bind(pi*x^2, 10)"), Ok(Polynomial::constant(PI * 10.0 * 10.0)));Run
Trait Implementations
impl Calculator<Tokenizer, PolynomialParser, PolynomialEvaluator> for PolynomialCalculator[src]
fn process(&self, line: &str) -> Result<Polynomial, CalculationError>
Takes string and evaluates it into a Polynomial. Read more