Struct macro_railroad::lowering::MacroRules

pub struct MacroRules {
    pub name: String,
    pub rules: Matcher,
}

A more coarse representation of parser::MacroRules.

Fields

name: String

This macro's name.

rules: Matcher

The set of rules in this macro. Starts out as a Choice (one for every pattern)

Implementations

impl MacroRules

pub fn foldcommontails(&mut self)

Recursivly fold common prefixes and suffixes in all rules

pub fn remove_internal(&mut self)

Replace all rules starting with dunder-literals (e.g. "__impl") with a single comment.

pub fn collect_nonterminals(&mut self) -> HashMap<Fragment, HashSet<String>>

Collect the unique set of non-terminal symbols.

pub fn ungroup(&mut self)

Unpack all Matcher::Group in the tree

pub fn normalize(&mut self)

Transmogrify the tree by removing superfluous elements.

For example, a Choice([Sequence([Terminal("Foo"), Empty])]) becomes just Terminal("Foo").

pub fn any<F: FnMut(&Matcher) -> bool>(&self, predicate: F) -> bool

Tests if any Matcher matches the given predicate.

pub fn contains(&self, needle: &Matcher) -> bool

Tests if the given Matcher is found in the graph.

Trait Implementations

impl Clone for MacroRules

fn clone(&self) -> MacroRules

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for MacroRules

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

Formats the value using the given formatter.

impl From<MacroRules> for MacroRules

fn from(m: MacroRules) -> MacroRules

Performs the conversion.

impl PartialEq<MacroRules> for MacroRules

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

This method tests for self and other values to be equal, and is used by ==.

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

This method tests for !=.

impl StructuralPartialEq for MacroRules