Enum LIAVariableConstraint 

pub enum LIAVariableConstraint {
    ComparisonConstraint(ComparisonConstraint<Variable>),
    SingleVarConstraint(SingleAtomConstraint<Variable>),
    SumVarConstraint(SumAtomConstraint<Variable>),
    BinaryGuard(Box<LIAVariableConstraint>, BooleanConnective, Box<LIAVariableConstraint>),
    True,
    False,
}

Abstract constraint type for linear arithmetic formulas over shared variables

This struct allows to represent combinations the different types of constraints over evaluations of shared variables. It allows to reference:

• SingleAtomConstraint: Which represents a threshold in the form x <COMPARISON_OP> c_1 * p_1 + ... c_n * p_n + c where c_1, ..., c_n, c are rational constants, p_1, ..., p_n are Parameters and x is a single shared variable.
• SumAtomConstraint: Represents a threshold of the form cx_1 * x_1 + ... + cx_m * x_m <COMPARISON_OP> c_1 * p_1 + ... c_n * p_n + c where c_1, ..., c_n, cx_1, ..., cx_m, c are rational constants, p_1, ..., p_n are Parameters and x_1, …, x_m are shared variables. Additionally, all coefficients cx_1, ..., cx_m must be all positive.
• ComparisonConstraint: Comparison constraints are structured analog to a SumAtomConstraint, but allow mixing positive and negative constants in the constants cx_1, ..., cx_m.

and boolean combinations of these guards

Variants

ComparisonConstraint(ComparisonConstraint<Variable>)

Constraint over the difference between variables / comparing variables

SingleVarConstraint(SingleAtomConstraint<Variable>)

Constraint over a single variable

SumVarConstraint(SumAtomConstraint<Variable>)

Constraint over the sum of multiple variables

BinaryGuard(Box<LIAVariableConstraint>, BooleanConnective, Box<LIAVariableConstraint>)

Boolean Combination of multiple constraints over variables

True

True / always enabled

False

False / always disabled

Implementations

impl LIAVariableConstraint

fn remove_sumvar( self, sv_to_v: &HashMap<WeightedSum<Variable>, Variable>, ) -> Self

Replace the LIAVariableConstraint::SumVarConstraint in a LIAVariableConstraint by the appropriate LIAVariableConstraint::SingleVarConstraint

impl LIAVariableConstraint

fn get_distinct_thresholds(&self) -> HashSet<Threshold>

Get all Thresholds appearing in the constraint

pub fn count_number_of_thresholds(&self) -> u32

Count the number of thresholds appearing in the constraint

pub fn has_sum_var(&self) -> bool

Check if the guard contains a SumAtomConstraint in its constraint

pub fn has_comparison_guard(&self) -> bool

Check if the guard contains a ComparisonConstraint in its constraint

pub fn get_single_var_constraints(&self) -> Vec<SingleAtomConstraint<Variable>>

Get all SingleAtomConstraints appearing in the constraint

pub fn get_multi_variable_guards(&self) -> Vec<SumAtomConstraint<Variable>>

Get all SumAtomConstraint appearing in the constraint

pub fn get_comparison_guards(&self) -> Vec<ComparisonConstraint<Variable>>

Get all ComparisonConstraint appearing in the constraint

pub fn is_upper_guard(&self) -> bool

Check if the constraint is an upper guard

pub fn is_lower_guard(&self) -> bool

Check if the constraint is a lower guard

Trait Implementations

impl BitAnd for LIAVariableConstraint

type Output = LIAVariableConstraint

The resulting type after applying the & operator.

fn bitand(self, rhs: Self) -> Self::Output

Performs the & operation.

impl BitOr for LIAVariableConstraint

type Output = LIAVariableConstraint

The resulting type after applying the | operator.

fn bitor(self, rhs: Self) -> Self::Output

Performs the | operation.

impl Clone for LIAVariableConstraint

fn clone(&self) -> LIAVariableConstraint

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for LIAVariableConstraint

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

Formats the value using the given formatter.

impl Display for LIAVariableConstraint

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

Formats the value using the given formatter.

impl Hash for LIAVariableConstraint

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for LIAVariableConstraint

fn cmp(&self, other: &LIAVariableConstraint) -> 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 LIAVariableConstraint

fn eq(&self, other: &LIAVariableConstraint) -> 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 LIAVariableConstraint

fn partial_cmp(&self, other: &LIAVariableConstraint) -> 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 TryFrom<&BooleanExpression<Variable>> for LIAVariableConstraint

type Error = ConstraintRewriteError

The type returned in the event of a conversion error.

fn try_from(expr: &BooleanExpression<Variable>) -> Result<Self, Self::Error>

Performs the conversion.

impl TryFrom<BooleanExpression<Variable>> for LIAVariableConstraint

type Error = ConstraintRewriteError

The type returned in the event of a conversion error.

fn try_from(expr: BooleanExpression<Variable>) -> Result<Self, Self::Error>

Performs the conversion.

impl TryFrom<NonNegatedBooleanExpression<Variable>> for LIAVariableConstraint

fn try_from( value: NonNegatedBooleanExpression<Variable>, ) -> Result<Self, Self::Error>

Parse the NonNegatedBooleanExpression into a LIAVariableConstraint by converting into weighted sums of parameters and variables

type Error = ConstraintRewriteError

The type returned in the event of a conversion error.

impl VariableConstraint for LIAVariableConstraint

fn as_boolean_expr(&self) -> BooleanExpression<Variable>

Get the guard as a boolean expression over variables

impl Eq for LIAVariableConstraint

impl StructuralPartialEq for LIAVariableConstraint