Struct HiddenState 

pub struct HiddenState<T>(pub T)
where
    T: Default;

Sometimes one want to compose types or create structures for unsynn that have members that are not part of the parsed syntax but add some additional information. This struct can be used to hold such members while still using the Parser and ToTokens trait implementations automatically generated by the [unsynn!{}] macro or composition syntax. HiddenState will not consume any tokens when parsing and will not emit any tokens when generating a TokenStream. On parsing it is initialized with a default value. It has Deref and DerefMut implemented to access the inner value.

Tuple Fields

0: T

Trait Implementations

impl<T> Clone for HiddenState<T>

where T: Clone + Default,

fn clone(&self) -> HiddenState<T>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<T> Debug for HiddenState<T>

where T: Default + Debug,

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

Formats the value using the given formatter.

impl<T> Default for HiddenState<T>

where T: Default,

fn default() -> HiddenState<T>

Returns the “default value” for a type.

impl<T> Deref for HiddenState<T>

where T: Default,

type Target = T

The resulting type after dereferencing.

fn deref(&self) -> &<HiddenState<T> as Deref>::Target

Dereferences the value.

impl<T> DerefMut for HiddenState<T>

where T: Default,

fn deref_mut(&mut self) -> &mut <HiddenState<T> as Deref>::Target

Mutably dereferences the value.

impl<T> Parser for HiddenState<T>

where T: Default,

fn parser(_ctokens: &mut TokenIter) -> Result<HiddenState<T>, 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<T> ToTokens for HiddenState<T>

where T: Default,

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.