Enum Predicate 

pub enum Predicate {
    MinCount {
        attribute: String,
        count: usize,
    },
    MinDistinct {
        attribute: String,
        count: usize,
    },
    None {
        attribute: String,
    },
    Any {
        attribute: String,
    },
    All {
        attribute: String,
    },
    And(Vec<Predicate>),
    Or(Vec<Predicate>),
    Not(Box<Predicate>),
}

A predicate over signer attributes.

Variants

MinCount

At least count signers must have attribute.

Fields

attribute: String

Attribute name (e.g., “role:director”).

count: usize

Required count.

MinDistinct

At least count distinct values of attribute must appear.

Fields

attribute: String

Attribute name.

count: usize

Required distinct-value count.

None

No signer has attribute.

Fields

attribute: String

Attribute that no signer must have.

Any

At least one signer has attribute.

Fields

attribute: String

Attribute that at least one signer must have.

All

All signers have attribute.

Fields

attribute: String

Attribute that every signer must have.

And(Vec<Predicate>)

Conjunction of sub-predicates.

Or(Vec<Predicate>)

Disjunction of sub-predicates.

Not(Box<Predicate>)

Negation of a sub-predicate.

Trait Implementations

impl Clone for Predicate

fn clone(&self) -> Predicate

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Predicate

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

Formats the value using the given formatter.