Struct Cons 

pub struct Cons<A, B, C = Nothing, D = Nothing> {
    pub first: A,
    pub second: B,
    pub third: C,
    pub fourth: D,
}

Conjunctive A followed by B and optional C and D When C and D are not used, they are set to Nothing.

Fields

first: A

The first value

second: B

The second value

third: C

The third value

fourth: D

The fourth value

Trait Implementations

impl<A, B, C, D> Clone for Cons<A, B, C, D>

where A: Clone, B: Clone, C: Clone, D: Clone,

fn clone(&self) -> Cons<A, B, C, D>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<A, B, C, D> Debug for Cons<A, B, C, D>

where A: Debug, B: Debug, C: Debug + 'static, D: Debug + 'static,

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

Formats the value using the given formatter.

impl<A, B, C, D> Parser for Cons<A, B, C, D>

where A: Parse, B: Parse, C: Parse, D: Parse,

fn parser( tokens: &mut ShadowCountedIter<'_, <TokenStream as IntoIterator>::IntoIter>, ) -> Result<Cons<A, B, C, D>, 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<A, B, C, D> ToTokens for Cons<A, B, C, D>

where A: ToTokens, B: ToTokens, C: ToTokens, D: ToTokens,

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

Write &self to the given TokenStream.

fn to_token_iter( &self, ) -> ShadowCountedIter<'_, <TokenStream as IntoIterator>::IntoIter>

Convert &self into a TokenIter object.

fn into_token_iter<'a>( self, ) -> ShadowCountedIter<'a, <TokenStream as IntoIterator>::IntoIter>

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.