static this(){
    t_semi = new Parser(null);
    t_lpar = new Parser(null);
    t_rpar = new Parser(null);
    t_uscore = new Parser(null);
    t_eq = new Parser(null);
    t_dot = new Parser(null);
    t_mul = new Parser(null);
    t_colon = new Parser(null);
    t_comma = new Parser(null);
    t_public = new Parser(null);
    t_import = new Parser(null);
    t_str = new Parser(null);
    t_id = new Parser(null);

    start = new Parser(null);
    importStmt = new Parser(null);
    import1 = new Parser(null);
    import12 = new Parser(null);
    import2 = new Parser(null);
    import6 = new Parser(null);
    import22 = new Parser(null);
    import3 = new Parser(null);
    import4 = new Parser(null);
    import5 = new Parser(null);


    t_semi <<= P(";");
    t_lpar <<= P("(");
    t_rpar <<= P(")");
    t_uscore <<= P("_");
    t_eq <<= P("=");
    t_dot <<= P(".");
    t_mul <<= P("*");
    t_colon <<= P(":");
    t_comma <<= P(",");
    t_public <<= P("public");
    t_import <<= P("import");
    t_str <<= P(TokenType.StringLiteral);
    t_id <<= P(TokenType.Identifier);

    start <<= *importStmt & P("EOF");
    importStmt <<= -t_public & t_import & import1;
    import1 <<= t_semi & t_lpar & import2 &
                *(t_semi & (import2 | import12)) & t_rpar & t_semi
            | import2;
    import12 <<= t_lpar & import22 & *(t_semi & (import22 | import12)) & t_rpar;
    import2 <<= t_str & -import4
            | import6
            | t_id & ((t_eq & (t_id & -import3 |
                               import6 | t_str & -import4)) | -import3);
    import6 <<= +(t_uscore & t_dot) & t_id & -import3;
    import22 <<= t_id & -(t_eq & t_id) & -import3;
    import3 <<= t_dot & (t_id & -import3 | t_mul | t_uscore)
            | import4;
    import4 <<= t_colon & import5 & *(t_comma & import5);
    import5 <<= t_uscore & t_eq & t_id
            | t_id & -(t_eq & t_id);
}

Parser
    t_semi,
    t_lpar,
    t_rpar,
    t_uscore,
    t_eq,
    t_dot,
    t_mul,
    t_colon,
    t_comma,
    t_public,
    t_import,
    t_str,
    t_id,

    start,
    importStmt,
    import1,
    import12,
    import2,
    import6,
    import22,
    import3,
    import4,
    import5;