static boolean composed_var_inner(PsiBuilder b, int l) {
    if (!recursion_guard_(b, l, "composed_var_inner")) return false;
    boolean r;
    r = arithmetic_expansion(b, l + 1);
    if (!r) r = subshell_command(b, l + 1);
    if (!r) r = shell_parameter_expansion(b, l + 1);
    return r;
  }
static boolean composed_var_inner(PsiBuilder b, int l)