Struct Pattern

pub struct Pattern {
    pub node: PatternNode,
    pub strictness: MatchStrictness,
    /* private fields */
}

Fields

node: PatternNode

strictness: MatchStrictness

Implementations

impl Pattern

pub fn has_error(&self) -> bool

pub fn fixed_string(&self) -> Cow<'_, str>

pub fn defined_vars(&self) -> HashSet<&str>

Get all defined variables in the pattern. Used for validating rules and report undefined variables.

impl Pattern

pub fn try_new<L: Language>(src: &str, lang: L) -> Result<Self, PatternError>

pub fn new<L: Language>(src: &str, lang: L) -> Self

pub fn with_strictness(self, strictness: MatchStrictness) -> Self

pub fn contextual<L: Language>( context: &str, selector: &str, lang: L, ) -> Result<Self, PatternError>

Trait Implementations

impl Clone for Pattern

fn clone(&self) -> Pattern

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Pattern

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

Formats the value using the given formatter.

impl<'r, D: Doc> From<Node<'r, D>> for Pattern

fn from(node: Node<'r, D>) -> Self

Converts to this type from the input type.

impl Matcher for Pattern

fn match_node_with_env<'tree, D: Doc>( &self, node: Node<'tree, D>, env: &mut Cow<'_, MetaVarEnv<'tree, D>>, ) -> Option<Node<'tree, D>>

Returns the node why the input is matched or None if not matched. The return value is usually input node itself, but it can be different node. For example Has matcher can return the child or descendant node.

fn potential_kinds(&self) -> Option<BitSet>

Returns a bitset for all possible target node kind ids. Returns None if the matcher needs to try against all node kind.

fn get_match_len<D: Doc>(&self, node: Node<'_, D>) -> Option<usize>

get_match_len will skip trailing anonymous child node to exclude punctuation.