Struct calculi::equation::Equation

pub struct Equation { /* fields omitted */ }

The equation struct containing the equation text and the parsed component.Component.

Various functions can be executed on this equation to solve it or it's variables.

Methods

impl Equation

pub fn new<T: Into<String>>(text: T) -> Equation

Creates a new equation from an equation in string form

Examples

let eq = calculi::Equation::new("a * sqrt(x + 1)");

pub fn solve_with<'a>(
    &self,
    vars_raw: impl IntoIterator<Item = (&'a str, f32)>
) -> Component

Get the output of an equation with the given variable definitions

Examples

let eq = calculi::Equation::new("a * sqrt(x + 1)");

assert_eq!(eq.solve_with(vec![("a", 2.0), ("x", 8.0)]).to_float().unwrap(), 6.0);

pub fn solve_for<'a>(
    &self,
    outcome: f32,
    vars: impl IntoIterator<Item = (&'a str, f32)>
) -> (Component, f32)

Attempt to solve equation that contains an unknown variable Returns left over outcome and expression if solving failed

Examples

let eq = calculi::Equation::new("a * sqrt(x + 1)");

let solved = eq.solve_for(9.0, vec![("x", 8.0)]);

assert_eq!(solved.0.to_string(), "a");
assert_eq!(solved.1, 3.0);

Trait Implementations

impl Debug for Equation

fn fmt(&self, f: &mut Formatter) -> Result

Formats the value using the given formatter.