Struct Nothing 

pub struct Nothing;

A unit that always matches without consuming any tokens. This is required when one wants to parse a Repeats without a delimiter. Note that using Nothing as primary entity in a Vec, LazyVec, DelimitedVec or Repeats will result in an infinite loop.

Trait Implementations

impl Clone for Nothing

fn clone(&self) -> Nothing

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Nothing

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

Formats the value using the given formatter.

impl Default for Nothing

fn default() -> Nothing

Returns the “default value” for a type.

impl Parser for Nothing

fn parser(_tokens: &mut TokenIter) -> Result<Nothing, Error>

The actual parsing function that must be implemented. This mutates the tokens iterator directly. It should not be called from user code except for implementing parsers itself and then only when the rules below are followed.

impl ToTokens for Nothing

fn to_tokens(&self, _tokens: &mut TokenStream)

Write &self to the given TokenStream.

fn to_token_iter(&self) -> TokenIter

Convert &self into a TokenIter object.

fn into_token_iter(self) -> TokenIter

where Self: Sized,

Convert self into a TokenIter object.

fn to_token_stream(&self) -> TokenStream

Convert &self into a TokenStream object.

fn into_token_stream(self) -> TokenStream

where Self: Sized,

Convert self into a TokenStream object.

fn tokens_to_string(&self) -> String

Convert &self into a String object. This is mostly used in the test suite to compare the outputs. When the input is a &str then this parses it and returns a normalized String.