Struct Context

pub struct Context { /* private fields */ }

Expression context, links variables and their values(currently only floats).

Implementations

impl Context

pub fn new() -> Self

pub fn init(&mut self)

Initializes Context with some builtin variables, you should call this one before using it. Of course if you don’t need some constants from f64… well, don’t call it?

pub fn define(&mut self, name: String, value: f64)

Defines a new variable(basically just inserts a new record into a hashmap).

pub fn eval(&self, expr: Expression) -> Result<f64>

Evaluates the passed expression, usually you’ll get one from the Parser

Trait Implementations

impl Debug for Context

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

Formats the value using the given formatter.

impl Default for Context

fn default() -> Context

Returns the “default value” for a type.