impc:ir:regex-structs-or-atoms   scheme

(define impc:ir:regex-structs-or-atoms (string-append
                                        ;;"(\\<?\\{(?<struct>[^{}]|\\<?\\{\\g<struct>*\\}\\>?\\**)*\\}\\>?\\**)"
                                        "(\\<?\\{(?<struct>(?!\\{|\\}|\\<\\{|\\}\\>).|\\<?\\{\\g<struct>*\\}\\>?\\**)*\\}\\>?\\**)"
                                        ;;"|(\\[(?<array>[^\\[\\]]|\\[\\g<array>*\\]\\**)*\\]\\**)"
                                        "|(\\[(?<array>(?!\\[|\\]).|\\[\\g<array>*\\]\\**)*\\]\\**)"
                                        ;;"|(\\<(?<vector>[^<>]|\\<\\g<vector>*\\>\\**)*\\>\\**)"
                                        "|(\\<(?<vector>(?!\\<|\\>).|\\<\\g<vector>*\\>\\**)*\\>\\**)"
                                        "|(?:([%#0-9a-zA-Z_-]\\**)+)"))