Enum EnvBindingStrength 

pub enum EnvBindingStrength {
    Weakest,
    Sum,
    Product,
    Power,
    Strongest,
}

Describes the context in which to print an algebraic expression. It is usually used to determine when to use parenthesis during printing.

Example

struct CustomDisplay<'a>(&'a DensePolyRing<StaticRing<i64>>, &'a El<DensePolyRing<StaticRing<i64>>>, EnvBindingStrength);
impl<'a> std::fmt::Display for CustomDisplay<'a> {
    fn fmt(&self, formatter: &mut std::fmt::Formatter) -> std::fmt::Result {
        self.0.get_ring().dbg_within(self.1, formatter, self.2)
    }
}
let poly_ring = DensePolyRing::new(StaticRing::<i64>::RING, "X");
let f = poly_ring.add(poly_ring.one(), poly_ring.indeterminate());
assert_eq!("X + 1", format!("{}", CustomDisplay(&poly_ring, &f, EnvBindingStrength::Weakest)));
assert_eq!("X + 1", format!("{}", CustomDisplay(&poly_ring, &f, EnvBindingStrength::Sum)));
assert_eq!("(X + 1)", format!("{}", CustomDisplay(&poly_ring, &f, EnvBindingStrength::Product)));
assert_eq!("(X + 1)", format!("{}", CustomDisplay(&poly_ring, &f, EnvBindingStrength::Power)));
assert_eq!("(X + 1)", format!("{}", CustomDisplay(&poly_ring, &f, EnvBindingStrength::Strongest)));

Variants

Weakest

The weakest possible binding strength, i.e. never add parenthesis.

Sum

Binding strength of addition (and subtraction), i.e. only add parenthesis if the expression includes an operation that binds weaker than + (I cannot think of any example, this seems to be a rare situation).

Product

Binding strength of multiplication (and division), i.e. only add parenthesis if the expression includes an operation that binds weaker than * (Standard example would be +).

Power

Binding strength of powering, i.e. only add parenthesis if the expression includes an operation that binds weaker than exponentiation (Standard examples would be + or *).

Strongest

The strongest possible binding strength, i.e. always add parenthesis.

Trait Implementations

impl Clone for EnvBindingStrength

fn clone(&self) -> EnvBindingStrength

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for EnvBindingStrength

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

Formats the value using the given formatter.

impl Ord for EnvBindingStrength

fn cmp(&self, other: &EnvBindingStrength) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for EnvBindingStrength

fn eq(&self, other: &EnvBindingStrength) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd for EnvBindingStrength

fn partial_cmp(&self, other: &EnvBindingStrength) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Copy for EnvBindingStrength

impl Eq for EnvBindingStrength

impl StructuralPartialEq for EnvBindingStrength