Struct Rule 

pub struct Rule {
    pub meta: MetaSpec,
    /* private fields */
}

An AST update rule.

Fields

meta: MetaSpec

Implementations

impl Rule

pub fn eval<N: AstNode + From<Node>>(&self, n: &mut N) -> Result<bool, ()>

Applies the rule to the specified node. True is returned if the rule matched & an action was taken.

pub fn self_test(&self) -> Result<(), (usize, String)>

Run the self tests.

Trait Implementations

impl Clone for Rule

fn clone(&self) -> Rule

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: &Rule) -> 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 TryFrom<RuleSpec> for Rule

type Error = String

The type returned in the event of a conversion error.

fn try_from(s: RuleSpec) -> Result<Self, Self::Error>

Performs the conversion.

impl Eq for Rule

impl StructuralPartialEq for Rule