Enum wagon_parser::parser::symbol::Symbol

pub enum Symbol {
    NonTerminal(SpannableNode<Ident>, Vec<SpannableNode<Ident>>),
    Assignment(Vec<SpannableNode<Assignment>>),
    Terminal(SpannableNode<Terminal>),
    Epsilon,
}

A symbol in a Chunk.

A symbol is any individual element of a Chunk.

Grammar

Symbol -> Ident NTArgs?
|  Terminal
|  ("{" Assignment* "}")?
|

;

Variants

NonTerminal(SpannableNode<Ident>, Vec<SpannableNode<Ident>>)

A non-terminal with optional parameters.

Assignment(Vec<SpannableNode<Assignment>>)

A list of Assignment enclosed by {}.

Terminal(SpannableNode<Terminal>)

A Terminal.

Epsilon

Nothing.

Implementations

impl Symbol

pub fn new_unspanned_nonterminal(arg_0: Ident, arg_1: Vec<Ident>) -> Self

Construct a Self::NonTerminal with dummy span information.

pub fn new_unspanned_assignment(arg_0: Vec<Assignment>) -> Self

Construct a Self::Assignment with dummy span information.

pub fn new_unspanned_terminal(arg_0: Terminal) -> Self

Construct a Self::Terminal with dummy span information.

pub fn new_unspanned_epsilon() -> Self

Construct a Self::Epsilon with dummy span information.

impl Symbol

pub const fn is_terminal(&self) -> bool

Check if this symbol is not a non-terminal.

pub const fn is_assignment(&self) -> bool

Check if this symbol is an Assignment.

pub fn simple_terminal(ident: &str) -> Self

Create a symbol which is just a Terminal::LitString representing the input parameter.

pub fn simple_ident(ident: &str) -> Self

Create a symbol which is just a non-terminal Ident::Unknown with no arguments, representing the input parameter.

Trait Implementations

impl Clone for Symbol

fn clone(&self) -> Symbol

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Symbol

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

Formats the value using the given formatter.

impl Default for Symbol

fn default() -> Self

Returns the “default value” for a type.

impl Display for Symbol

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

Formats the value using the given formatter.

impl Hash for Symbol

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Parse for Symbol

fn parse(lexer: &mut LexerBridge<'_>) -> ParseResult<Self>

where Self: Sized,

Given a lexer, try to parse a valid instance of this node.

fn parse_sep( lexer: &mut LexerBridge<'_>, join: Tokens ) -> ParseResult<Vec<Self>>

where Self: Sized,

Parse multiple instances of this node, separated by a Tokens.

fn parse_sep_end( lexer: &mut LexerBridge<'_>, join: Tokens, end: Tokens ) -> ParseResult<Vec<Self>>

where Self: Sized,

Parse multiple instances of this node, separated by a Tokens end ended by a (possibly different) Tokens.

impl PartialEq for Symbol

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

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

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

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Eq for Symbol

impl StructuralPartialEq for Symbol