Trait Contextable

pub trait Contextable {
    // Required methods
    fn precision(&self) -> usize;
    fn rounding_mode(&self) -> RoundingMode;
    fn consts(&mut self) -> &mut Consts;
    fn const_pi(&mut self) -> BigFloat;
    fn const_e(&mut self) -> BigFloat;
    fn const_ln2(&mut self) -> BigFloat;
    fn const_ln10(&mut self) -> BigFloat;
    fn emin(&self) -> i32;
    fn emax(&self) -> i32;
}

Represents a type that can be used as context in expr! macro.

Examples

let p = 123;
let rm = RoundingMode::Down;
let mut cc = Consts::new().expect("Constants cache allocated");
let pi = cc.pi(p, rm);

// Make context out of tuple.
let mut ctx = (p, rm, &mut cc);

assert_eq!(p, ctx.precision());
assert_eq!(rm, ctx.rounding_mode());
assert_eq!(pi, ctx.const_pi());

Required Methods

fn precision(&self) -> usize

Returns the precision of the context.

fn rounding_mode(&self) -> RoundingMode

Returns the rounding mode of the context.

fn consts(&mut self) -> &mut Consts

Returns a mutable reference to the constant cache of the context.

fn const_pi(&mut self) -> BigFloat

Returns the value of the pi number.

fn const_e(&mut self) -> BigFloat

Returns the value of the Euler number.

fn const_ln2(&mut self) -> BigFloat

Returns the value of the natural logarithm of 2.

fn const_ln10(&mut self) -> BigFloat

Returns the value of the natural logarithm of 10.

fn emin(&self) -> i32

Returns the minimum exponent.

fn emax(&self) -> i32

Returns the maximum exponent.

Implementations on Foreign Types

impl Contextable for (usize, RoundingMode, &mut Consts)

fn precision(&self) -> usize

fn rounding_mode(&self) -> RoundingMode

fn consts(&mut self) -> &mut Consts

fn const_pi(&mut self) -> BigFloat

fn const_e(&mut self) -> BigFloat

fn const_ln2(&mut self) -> BigFloat

fn const_ln10(&mut self) -> BigFloat

fn emin(&self) -> i32

fn emax(&self) -> i32

impl Contextable for (usize, RoundingMode, &mut Consts, i32, i32)

fn precision(&self) -> usize

fn rounding_mode(&self) -> RoundingMode

fn consts(&mut self) -> &mut Consts

fn const_pi(&mut self) -> BigFloat

fn const_e(&mut self) -> BigFloat

fn const_ln2(&mut self) -> BigFloat

fn const_ln10(&mut self) -> BigFloat

fn emin(&self) -> i32

fn emax(&self) -> i32

Implementors

impl Contextable for Context