284         concat: ast::Concat,
640     fn push_alternate(&self, mut concat: ast::Concat) -> Result<ast::Concat> {  in push_alternate()  argument
645         Ok(ast::Concat { span: self.span(), asts: vec![] })  in push_alternate()
650     fn push_or_add_alternation(&self, concat: ast::Concat) {  in push_or_add_alternation()  argument
678     fn push_group(&self, mut concat: ast::Concat) -> Result<ast::Concat> {  in push_group()  argument
704                 Ok(ast::Concat { span: self.span(), asts: vec![] })  in push_group()
719     fn pop_group(&self, mut group_concat: ast::Concat) -> Result<ast::Concat> {  in pop_group()  argument
771     fn pop_group_end(&self, mut concat: ast::Concat) -> Result<Ast> {  in pop_group_end()
960         let mut concat = ast::Concat { span: self.span(), asts: vec![] };  in parse_with_comments()
1025         mut concat: ast::Concat,  in parse_uncounted_repetition()  argument
1027     ) -> Result<ast::Concat> {  in parse_uncounted_repetition()  argument
1080         mut concat: ast::Concat,  in parse_counted_repetition()  argument
1081     ) -> Result<ast::Concat> {  in parse_counted_repetition()  argument
2194             Ast::Concat(ref x) => &x.span,  in visit_pre()
2215             | Ast::Concat(_) => {  in visit_post()
2442         Ast::Concat(ast::Concat { span, asts })  in concat_with()
4297             Ok(Ast::Concat(ast::Concat {  in parse_octal()
4315             Ok(Ast::Concat(ast::Concat {  in parse_octal()
5717             Ok(Ast::Concat(ast::Concat {  in parse_unicode_class()
5735             Ok(Ast::Concat(ast::Concat {  in parse_unicode_class()
5828             Ok(Ast::Concat(ast::Concat {  in parse_perl_class()