Enum macroex::OneOrMany

pub enum OneOrMany<TOne, TMany> {
    One(TOne),
    Many(TMany),
}

Matches one of two FromMacro implementors by count.

• Uses One if input is a TokenTree
• Uses Many if input is a TokenStream

Variants

One(TOne)

Many(TMany)

Trait Implementations

impl<TOne: Debug, TMany: Debug> Debug for OneOrMany<TOne, TMany>

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

Formats the value using the given formatter.

impl<TOne, TMany> FromMacro for OneOrMany<TOne, TMany>

where TOne: FromMacro, TMany: FromMacro,

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

This will be called if there is only one item

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

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

const PREFER_MANY: bool = false

Hint to All and similar extractors to disable length validation.

fn peek(tt: &TokenTree) -> bool

Look ahead and determine parsability.