135     |input: ParseStream| {  in parser()
136         if input.is_empty() {  in parser()
139             parse_nested_meta(input, logic)  in parser()
168     pub input: ParseStream<'a>,  field
205         self.input.parse::<Token![=]>()?;  in value()
206         Ok(self.input)  in value()
278         parenthesized!(content in self.input);  in parse_nested_meta()
382         let end_span = self.input.cursor().prev_span();  in error()
388     input: ParseStream,  in parse_nested_meta()
392         let path = input.call(parse_meta_path)?;  in parse_nested_meta()
393         logic(ParseNestedMeta { path, input })?;  in parse_nested_meta()
394         if input.is_empty() {  in parse_nested_meta()
397         input.parse::<Token![,]>()?;  in parse_nested_meta()
398         if input.is_empty() {  in parse_nested_meta()
405 fn parse_meta_path(input: ParseStream) -> Result<Path> {  in parse_meta_path()
407         leading_colon: input.parse()?,  in parse_meta_path()
410             if input.peek(Ident::peek_any) {  in parse_meta_path()
411                 let ident = Ident::parse_any(input)?;  in parse_meta_path()
413             } else if input.is_empty() {  in parse_meta_path()
414                 return Err(input.error("expected nested attribute"));  in parse_meta_path()
415             } else if input.peek(Lit) {  in parse_meta_path()
416                 return Err(input.error("unexpected literal in nested attribute, expected ident"));  in parse_meta_path()
418                 return Err(input.error("unexpected token in nested attribute, expected ident"));  in parse_meta_path()
420             while input.peek(Token![::]) {  in parse_meta_path()
421                 let punct = input.parse()?;  in parse_meta_path()
423                 let ident = Ident::parse_any(input)?;  in parse_meta_path()