Enum Rule 

pub enum Rule {
    Deny(String),
    RequireField {
        field: String,
        pattern: Pattern,
    },
    ForbidField {
        field: String,
    },
}

What must hold about a subtree once the pattern matches.

Variants

Deny(String)

Any match is a violation. The string is the reason/diagnostic.

RequireField

The matched subtree must be a struct-form containing field with a value matching pattern.

Fields

field: String

pattern: Pattern

ForbidField

The matched subtree must NOT contain field, or if it does, the value must be Nil.

Fields

field: String

Trait Implementations

impl Clone for Rule

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Rule

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

Formats the value using the given formatter.

impl PartialEq for Rule

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Rule