Struct macroex::PunctJoint

pub struct PunctJoint<const PUNCT: char>;

Unit struct validator of a joint punctuation mark.

Example

let mut iter = quote!(=>).into_iter();
let PunctJoint::<'='> = iter.extract().unwrap();
let PunctAlone::<'>'> = iter.extract().unwrap();

Trait Implementations

impl<const PUNCT: char> FromMacro for PunctJoint<PUNCT>

fn from_one(tt: TokenTree) -> Result<Self, Error>

This will be called if there is only one item

const PREFER_MANY: bool = false

Hint to All and similar extractors to disable length validation.

fn from_many(tokens: TokenStream) -> Result<Self, Error>

This will be called if there is more than one item.

fn peek(tt: &TokenTree) -> bool

Look ahead and determine parsability.