Function parse 

pub(super) fn parse<'item, 'iter, I>(
    version: FormatDescriptionVersion,
    tokens: &'iter mut Lexed<I>,
) -> impl Iterator<Item = Result<Item<'item>, Error>> + use<'item, 'iter, I>
where
    I: Iterator<Item = Result<Token<'item>, Error>>,
    'item: 'iter,

Available on (crate features formatting or parsing) and crate feature alloc only.

Parse the provided tokens into an AST.