Struct calc_lib::Functions

pub struct Functions<'a> { /* private fields */ }

A list of definitions of functions to pass into the interpreter to solve for the variables.

Implementations

impl<'a> Functions<'a>

pub fn new() -> Self

Create a new list of functions

pub fn register<S: Into<String>, F: Fn(Vec<f64>) -> Result<f64, Error> + 'a + Copy>(
    &mut self,
    name: S,
    f: F
)

register a function

pub fn exists<S: Into<String>>(&self, ident: S) -> bool

check if a function exists

Trait Implementations

impl Default for Functions<'_>

fn default() -> Self

create a new list of functions with the default functions: log, sqrt, sin, cos, tan