Enum expression_num::NumExpr

pub enum NumExpr<T: NumType> {
    Const(T),
    Var(usize),
    Add(Box<NumExpr<T>>, Box<NumExpr<T>>),
    Sub(Box<NumExpr<T>>, Box<NumExpr<T>>),
    Mul(Box<NumExpr<T>>, Box<NumExpr<T>>),
    Div(Box<NumExpr<T>>, Box<NumExpr<T>>),
    Divz(Box<NumExpr<T>>, Box<NumExpr<T>>),
    Recip(Box<NumExpr<T>>),
    Recipz(Box<NumExpr<T>>),
}

An expression evaluates to a numeric value of type NumType.

Variants

Const(T)

A constant value.

Var(usize)

References a variable by position

Add(Box<NumExpr<T>>, Box<NumExpr<T>>)Sub(Box<NumExpr<T>>, Box<NumExpr<T>>)Mul(Box<NumExpr<T>>, Box<NumExpr<T>>)Div(Box<NumExpr<T>>, Box<NumExpr<T>>)Divz(Box<NumExpr<T>>, Box<NumExpr<T>>)

Safe division with x/0 = 0.0

Recip(Box<NumExpr<T>>)

Reciprocal (1 / x).

Recipz(Box<NumExpr<T>>)

Reciprocal using safe division

Methods

impl<T: NumType> NumExpr<T>

pub fn op_add(self, other: NumExpr<T>) -> NumExpr<T>

pub fn op_sub(self, other: NumExpr<T>) -> NumExpr<T>

pub fn op_mul(self, other: NumExpr<T>) -> NumExpr<T>

pub fn op_div(self, other: NumExpr<T>) -> NumExpr<T>

pub fn op_divz(self, other: NumExpr<T>) -> NumExpr<T>

pub fn op_recip(self) -> NumExpr<T>

pub fn op_recipz(self) -> NumExpr<T>

Trait Implementations

impl<T: Clone + NumType> Clone for NumExpr<T>

fn clone(&self) -> NumExpr<T>

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<T: Eq + NumType> Eq for NumExpr<T>

impl<'a, T: NumType + Into<Sexp>> Into<Sexp> for &'a NumExpr<T>

fn into(self) -> Sexp

Performs the conversion.

impl<T: PartialEq + NumType> PartialEq<NumExpr<T>> for NumExpr<T>

fn eq(&self, other: &NumExpr<T>) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &NumExpr<T>) -> bool

This method tests for !=.

impl<T: Debug + NumType> Debug for NumExpr<T>

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

Formats the value using the given formatter.

impl<T: NumType> Expression for NumExpr<T>

type Element = T

fn evaluate(
    &self,
    variables: &[Self::Element]
) -> Result<Self::Element, ExpressionError>

Evaluates the expression with the given variables bound.