Enum Sign 

#[non_exhaustive]
pub enum Sign {
    NonNegative,
    Free,
    NonPositive,
}

The sign restriction of a variable.

The tableau only has non-negative columns, so the other signs are substituted, as in Taha: a free variable becomes x = x+ - x- (two columns, named x1+ and x1-) and a non-positive one x = -x- (one column, x1-). Values and sensitivity are reported for the original variable. With the serde feature: "non_negative", "free", "non_positive".

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

NonNegative

x >= 0, the default.

Free

No sign restriction.

NonPositive

x <= 0.

Trait Implementations

impl Clone for Sign

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Sign

impl Debug for Sign

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

Formats the value using the given formatter.

impl Default for Sign

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for Sign

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for Sign

impl PartialEq for Sign

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for Sign

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for Sign