3 use proc_macro::{Delimiter, Group, Ident, Spacing, Span, TokenTree};
5 fn concat_helper(tokens: &[TokenTree]) -> Vec<(String, Span)> {  in concat_helper()
12             Some(TokenTree::Literal(lit)) => {  in concat_helper()
21             Some(TokenTree::Ident(ident)) => {  in concat_helper()
28             Some(TokenTree::Punct(p)) if p.as_char() == ':' => {  in concat_helper()
29                 let Some(TokenTree::Ident(ident)) = tokens.next() else {  in concat_helper()
49             Some(TokenTree::Group(group)) if group.delimiter() == Delimiter::None => {  in concat_helper()
50                 let tokens = group.stream().into_iter().collect::<Vec<TokenTree>>();  in concat_helper()
60 fn concat(tokens: &[TokenTree], group_span: Span) -> TokenTree {  in concat()  argument
63     TokenTree::Ident(Ident::new(&pasted, group_span))  in concat()
66 pub(crate) fn expand(tokens: &mut Vec<TokenTree>) {  in expand()  argument
68         if let TokenTree::Group(group) = token {  in expand()
75                 && matches!(&stream[0], TokenTree::Punct(p) if p.as_char() == '<')  in expand()
76                 && matches!(&stream[stream.len() - 1], TokenTree::Punct(p) if p.as_char() == '>')  in expand()
85                 *token = TokenTree::Group(group);  in expand()
95             (TokenTree::Punct(a), TokenTree::Punct(b))  in expand()
99                 TokenTree::Group(group) if group.delimiter() == Delimiter::None => {  in expand()
106                 TokenTree::Group(group) if group.delimiter() == Delimiter::None => {  in expand()