0.9.2 @safe & @trusted first pass

9 files changed, 239 insertions, 235 deletions

diff --git a/org/in_source_files.org b/org/in_source_files.org
index 4c61ecc..907820c 100644
--- a/org/in_source_files.org
+++ b/org/in_source_files.org
@@ -267,7 +267,7 @@ static template spineRawMarkupContent() {
   mixin spineRgxInit;
   static auto rgx = Rgx();
   string[] _images=[];
-  auto _extract_images(S)(S content_block) {
+  auto _extract_images(S)(S content_block) @safe {
     string[] images_;
     string _content_block = content_block.to!string;
     if (auto m = _content_block.matchAll(rgx.image)) {
@@ -276,7 +276,7 @@ static template spineRawMarkupContent() {
     return images_;
   }
   auto rawsrc = RawMarkupContent();
-  auto spineRawMarkupContent(O,Fn)(O _opt_action, Fn fn_src) {
+  auto spineRawMarkupContent(O,Fn)(O _opt_action, Fn fn_src) @safe {
     auto _0_header_1_body_content_2_insert_filelist_tuple
       = rawsrc.sourceContentSplitIntoHeaderAndBody(_opt_action, rawsrc.sourceContent(fn_src), fn_src);
     return _0_header_1_body_content_2_insert_filelist_tuple;
@@ -288,7 +288,11 @@ static template spineRawMarkupContent() {
         = raw.markupSourceReadIn(fn_src);
       return source_txt_str;
     }
-    final auto sourceContentSplitIntoHeaderAndBody(O)(O _opt_action, in string source_txt_str, in string fn_src="") {
+    final auto sourceContentSplitIntoHeaderAndBody(O)(
+      O         _opt_action,
+      in string source_txt_str,
+      in string fn_src=""
+    ) {
       auto raw = MarkupRawUnit();
       string[] insert_file_list;
       string[] images_list;
@@ -402,7 +406,7 @@ split is on first match of level A~ (which is required)
 
 #+name: meta_markup_source_raw_doc_header_and_content_split
 #+BEGIN_SRC d
-final private char[][] header0Content1(in string src_text) {
+final private char[][] header0Content1(in string src_text) @trusted { // cast(char[])
   /+ split string on _first_ match of "^:?A~\s" into [header, content] array/tuple +/
   char[][] header_and_content;
   auto m = (cast(char[]) src_text).matchFirst(rgx.heading_a);
@@ -421,7 +425,7 @@ final private char[][] header0Content1(in string src_text) {
 
 #+name: meta_markup_source_raw_source_line_array
 #+BEGIN_SRC d
-final private char[][] markupSourceLineArray(in char[] src_text) {
+final private char[][] markupSourceLineArray(in char[] src_text) @trusted { // cast(char[])
   char[][] source_line_arr
     = (cast(char[]) src_text).split(rgx.newline_eol_strip_preceding);
   return source_line_arr;
@@ -457,7 +461,7 @@ auto markupSourceReadIn(in string fn_src) {
 
 #+name: meta_markup_source_raw_tuple_of_header_and_body
 #+BEGIN_SRC d
-auto markupSourceHeaderContentRawLineTupleArray(in string source_txt_str) {
+auto markupSourceHeaderContentRawLineTupleArray(in string source_txt_str) @safe {
   string[] file_insert_list = [];
   string[] images_list = [];
   char[][] hc = header0Content1(source_txt_str);
diff --git a/org/meta_conf_make_meta.org b/org/meta_conf_make_meta.org
index 056985b..9fad67a 100644
--- a/org/meta_conf_make_meta.org
+++ b/org/meta_conf_make_meta.org
@@ -78,7 +78,7 @@ auto mkup = InlineMarkup();
 
 #+name: meta_defaults_template_structs
 #+BEGIN_SRC d
-string url_markup(string line) {
+string url_markup(string line) @safe {
   string line_ = line
     .replaceAll(
       rgx.smid_inline_link_markup_regular,
@@ -1161,7 +1161,7 @@ static template contentJSONtoSpineStruct() {
     doc_reform.meta.defaults,
     doc_reform.meta.rgx;
   ConfComposite _struct_composite;
-  auto contentJSONtoSpineStruct(C,J,M)(C _struct_composite, J _json, M _manifested, string _identifier) {
+  auto contentJSONtoSpineStruct(C,J,M)(C _struct_composite, J _json, M _manifested, string _identifier) @safe {
     mixin spineRgxInit;
     static auto rgx = Rgx();
     debug (json) {
diff --git a/org/metaverse.org b/org/metaverse.org
index 538e12b..f184d9e 100644
--- a/org/metaverse.org
+++ b/org/metaverse.org
@@ -38,7 +38,7 @@ template docAbstraction() {
   <<abs_top_init_struct>>
   <<abs_inline_para_tag_associations>>
                                                                                 /+ ↓ abstract marked up document +/
-  auto docAbstraction(CMM,Opt,Mf)(
+  auto docAbstraction(CMM,Opt,Mf) (
     char[][]           markup_sourcefile_content,
     CMM                conf_make_meta,
     Opt                opt_action,
@@ -3075,7 +3075,7 @@ functions used in document abstraction
 
 #+name: abs_functions_object_reset
 #+BEGIN_SRC d
-static string[string] object_reset()(string[string] an_object) {
+static string[string] object_reset()(string[string] an_object) @safe {
   an_object.remove("body_nugget");
   an_object.remove("substantive");
   an_object.remove("is");
@@ -3109,7 +3109,7 @@ void flow_common_reset_()(
 static int[string]         _check_ocn_status_()(
   char[]           line,
   int[string]      obj_type_status,
-) {
+) @safe {
   static auto rgx = Rgx();
   if (!(line.empty)
     && (obj_type_status["ocn_status_off_for_multiple_objects"] == OCN_off_block_status.off)
@@ -3175,7 +3175,7 @@ static int[string]         _check_ocn_status_()(
 char[] _doc_header_and_make_substitutions_(CMM)(
   char[]  line,
   CMM     conf_make_meta,
-) {
+) @safe {
   enum Substitute { match, markup, }
   if (conf_make_meta.make.substitute) {
     foreach(substitution_pair; conf_make_meta.make.substitute) {
@@ -3196,7 +3196,7 @@ char[] _doc_header_and_make_substitutions_(CMM)(
 char[] _doc_header_and_make_substitutions_fontface_(CMM)(
   char[]  line,
   CMM     conf_make_meta,
-) {
+) @safe {
   enum Substitute { match, markup, }
   if ( conf_make_meta.make.bold) {
     line = line.replaceAll(
@@ -3231,7 +3231,7 @@ void flow_txt_block_start()(
   return ref int[string]    obj_type_status,
   return ref uint[string]   dochas,
   return ref string[string] object_number_poem
-) {
+) @safe {
 #+END_SRC
 
 ****** block (various) curly open                                :curly:
@@ -3514,7 +3514,7 @@ void flow_txt_block_code()(
              char[]          line,
   return ref string[string]  an_object,
   return ref int[string]     obj_type_status
-) {
+) @safe {
   static auto rgx = Rgx();
   if (obj_type_status["curly_code"] == TriState.on) {
     if (line.matchFirst(rgx.block_curly_code_close)) {
@@ -3750,7 +3750,7 @@ string[string] flow_txt_block_quote()(
              char[]          line,
              string[string]  an_object,
   return ref int[string]     obj_type_status
-) {
+) @safe {
   static auto rgx = Rgx();
   if (obj_type_status["curly_quote"] == TriState.on) {
     if (line.matchFirst(rgx.block_curly_quote_close)) {
@@ -3798,7 +3798,7 @@ string[string] flow_txt_block_group()(
              char[]          line,
              string[string]  an_object,
   return ref int[string]     obj_type_status
-) {
+) @safe {
   static auto rgx = Rgx();
   if (obj_type_status["curly_group"] == State.on) {
     if (line.matchFirst(rgx.block_curly_group_close)) {
@@ -3847,7 +3847,7 @@ string[string] flow_txt_block_block()(
              char[]          line,
              string[string]  an_object,
   return ref int[string]     obj_type_status
-) {
+) @safe {
   static auto rgx = Rgx();
   if (obj_type_status["curly_block"] == TriState.on) {
     if (line.matchFirst(rgx.block_curly_block_close)) {
@@ -3898,7 +3898,7 @@ string[string]  flow_txt_block_poem(CMM)(
              string[string]  object_number_poem,
              CMM             conf_make_meta,
              string[string]  tag_in_seg,
-) {
+) @safe {
   static auto rgx = Rgx();
   if (obj_type_status["curly_poem"] == TriState.on) {
     if (line.matchFirst(rgx.block_curly_poem_close)) {
@@ -4694,7 +4694,7 @@ string[string] flow_heading_found_()(
              string[]              _make_unmarked_headings,
   return ref Regex!(char)[string]  heading_match_rgx,
   return ref int[string]           obj_type_status
-) {
+) @safe {
   static auto rgx = Rgx();
   if ((_make_unmarked_headings.length > 2)
   && (obj_type_status["make_headings"] == State.off)) {                        /+ headings found +/
@@ -4780,7 +4780,7 @@ char[] flow_heading_make_set_()(
              int[string]           line_occur,
   return ref Regex!(char)[string]  heading_match_rgx,
   return ref int[string]           obj_type_status
-) {
+) @safe {
   if ((obj_type_status["make_headings"] == State.on)
   && ((line_occur["para"] == State.off)
   && (line_occur["heading"] == State.off))
@@ -4846,7 +4846,7 @@ string[string] flow_heading_matched_(CMM)(
   return ref int[string]     collapsed_lev,
   return ref int[string]     obj_type_status,
   return ref CMM             conf_make_meta,
-) {
+) @safe {
   static auto rgx = Rgx();
   if (auto m = line.match(rgx.heading)) {                                      /+ heading match +/
     ++line_occur["heading"];
@@ -5004,7 +5004,7 @@ string[string] flow_para_match_()(
   return ref bool            bullet,
   return ref int[string]     obj_type_status,
   return ref int[string]     line_occur,
-) {
+) @safe {
   static auto rgx = Rgx();
   if (line_occur["para"] == State.off) {
     line = font_faces_line(line);
@@ -5057,7 +5057,7 @@ string[string] flow_para_match_()(
 #+BEGIN_SRC d
 char[] font_faces_line()(
   char[]  textline,
-) {
+) @safe {
   static auto rgx = Rgx();
   static auto mkup = InlineMarkup();
   if (textline.match(rgx.inline_faces_line)) {
@@ -5087,7 +5087,7 @@ char[] font_faces_line()(
 ObjGenericComposite flow_table_instructions(H)(
   return ref ObjGenericComposite  table_object,
              H                    table_head,
-) {
+) @safe {
   static auto rgx = Rgx();
   table_object.metainfo.is_of_part      = "body";
   table_object.metainfo.is_of_section   = "body";
@@ -5118,7 +5118,7 @@ ObjGenericComposite flow_table_instructions(H)(
 ObjGenericComposite flow_table_array_munge(T)(
   return ref ObjGenericComposite  table_object,
   return ref T                    table_array,
-) {
+) @safe {
   static auto rgx = Rgx();
   static auto mng = InlineMarkup();
   string _table_substantive;
@@ -5295,7 +5295,7 @@ pure struct OCNemitter {
   int ocn_digit, ocn_object_number, ocn_on_, ocn_off_, ocn_bkidx, ocn_bkidx_;
   string object_identifier;
   bool ocn_is_off;
-  auto ocn_emitter(int ocn_status_flag) {
+  auto ocn_emitter(int ocn_status_flag) @safe {
     OCNset ocn;
     assert(ocn_status_flag <= OCNstatus.reset);
     ocn_object_number = ocn_bkidx = 0;
@@ -5355,7 +5355,7 @@ static struct ObjInlineMarkupMunge {
   static auto rgx = Rgx();
   static auto mkup = InlineMarkup();
   int stage_reset_note_numbers = true;
-  private auto initialize_note_numbers() {
+  private auto initialize_note_numbers() @safe {
     n_foot = 0;
     n_foot_reg = 0;
     n_foot_sp_asterisk = 0;
@@ -5365,7 +5365,7 @@ static struct ObjInlineMarkupMunge {
 
 #+name: meta_emitters_obj_inline_markup_munge
 #+BEGIN_SRC d
-  static auto images()(string obj_txt_in) {
+  static auto images()(string obj_txt_in) @safe {
     static auto mng = InlineMarkup();
     /+ url matched +/
     obj_txt_in = obj_txt_in.replaceAll(rgx.inline_notes_al_special, ""); // TODO reinstate when special footnotes are implemented
@@ -5401,7 +5401,7 @@ static struct ObjInlineMarkupMunge {
 
 #+name: meta_emitters_obj_inline_markup_munge
 #+BEGIN_SRC d
-  auto footnotes_endnotes_markup_and_number_or_stars()(string obj_txt_in, bool reset_note_numbers) {
+  auto footnotes_endnotes_markup_and_number_or_stars()(string obj_txt_in, bool reset_note_numbers) @safe {
     /+ endnotes (regular) +/
     bool flg_notes_reg  = false;
     bool flg_notes_star = false;
@@ -5474,7 +5474,7 @@ static struct ObjInlineMarkupMunge {
   private auto object_notes_and_links_()(
     string obj_txt_in,
     bool reset_note_numbers=false
-  ) {
+  ) @safe {
     obj_txt_out = "";
     bool urls = false;
     bool images_without_dimensions = false;
@@ -5545,7 +5545,7 @@ static struct ObjInlineMarkupMunge {
   auto munge_heading()(
     string obj_txt_in,
     bool reset_note_numbers=false
-  ) {
+  ) @safe {
     obj_txt["munge"] = obj_txt_in
      .replaceFirst(rgx.heading, "")
      .replaceFirst(rgx.object_number_off_all, "")
@@ -5573,7 +5573,7 @@ static struct ObjInlineMarkupMunge {
 
 #+name: meta_emitters_obj_inline_markup_munge
 #+BEGIN_SRC d
-  auto munge_para()(string obj_txt_in) {
+  auto munge_para()(string obj_txt_in) @safe {
     obj_txt["munge"]=(obj_txt_in)
       .replaceFirst(rgx.para_attribs, "")
       .replaceFirst(rgx.object_number_off_all, "");
@@ -5592,7 +5592,7 @@ static struct ObjInlineMarkupMunge {
 
 #+name: meta_emitters_obj_inline_markup_munge
 #+BEGIN_SRC d
-  string munge_quote()(string obj_txt_in) {
+  string munge_quote()(string obj_txt_in) @safe {
     obj_txt["munge"]=obj_txt_in;
     return obj_txt["munge"];
   }
@@ -5611,7 +5611,7 @@ static struct ObjInlineMarkupMunge {
 
 #+name: meta_emitters_obj_inline_markup_munge
 #+BEGIN_SRC d
-  auto munge_group(string obj_txt_in) {
+  auto munge_group(string obj_txt_in) @safe {
     obj_txt["munge"]=obj_txt_in;
     auto t = object_notes_and_links_(obj_txt["munge"]);
     return t;
@@ -5631,7 +5631,7 @@ static struct ObjInlineMarkupMunge {
 
 #+name: meta_emitters_obj_inline_markup_munge
 #+BEGIN_SRC d
-  auto munge_block()(string obj_txt_in) {
+  auto munge_block()(string obj_txt_in) @safe {
     obj_txt["munge"]=obj_txt_in;
     auto t = object_notes_and_links_(obj_txt["munge"]);
     return t;
@@ -5651,7 +5651,7 @@ static struct ObjInlineMarkupMunge {
 
 #+name: meta_emitters_obj_inline_markup_munge
 #+BEGIN_SRC d
-  auto munge_verse()(string obj_txt_in) {
+  auto munge_verse()(string obj_txt_in) @safe {
     obj_txt["munge"]=obj_txt_in;
     auto t = object_notes_and_links_(obj_txt["munge"]);
     return t;
@@ -5670,7 +5670,7 @@ static struct ObjInlineMarkupMunge {
 
 #+name: meta_emitters_obj_inline_markup_munge
 #+BEGIN_SRC d
-  string munge_code()(string obj_txt_in) {
+  string munge_code()(string obj_txt_in) @safe {
     obj_txt_in = obj_txt_in.replaceAll(rgx.space, mkup.nbsp);
     obj_txt["munge"] = obj_txt_in;
     return obj_txt["munge"];
@@ -5685,7 +5685,7 @@ static struct ObjInlineMarkupMunge {
 
 #+name: meta_emitters_obj_inline_markup_munge
 #+BEGIN_SRC d
-  string munge_table()(string obj_txt_in) {
+  string munge_table()(string obj_txt_in) @safe {
     obj_txt["munge"]=obj_txt_in;
     return obj_txt["munge"];
   }
@@ -5697,7 +5697,7 @@ static struct ObjInlineMarkupMunge {
 
 #+name: meta_emitters_obj_inline_markup_munge
 #+BEGIN_SRC d
-  string munge_comment()(string obj_txt_in) {
+  string munge_comment()(string obj_txt_in) @safe {
     obj_txt["munge"]=obj_txt_in;
     return obj_txt["munge"];
   }
@@ -5733,7 +5733,7 @@ static struct ObjInlineMarkup {
     string           obj_key_,
     CMM              conf_make_meta,
     Flag!"_new_doc"  _new_doc
-  ) {
+  ) @safe {
     obj_txt["munge"] = obj_[obj_key_].dup;
     obj_txt["munge"] = (obj_["is"].match(ctRegex!(`verse|code`)))
     ? obj_txt["munge"]
@@ -5829,7 +5829,7 @@ static struct ObjInlineMarkup {
 #+BEGIN_SRC d
   auto _clean_heading_toc_()(
     char[] heading_toc_,
-  ) {
+  ) @safe {
    auto m = (cast(char[]) heading_toc_).matchFirst(rgx.heading);
    heading_toc_ = (m.post).replaceAll(
      rgx.inline_notes_curly_gen,
@@ -5843,7 +5843,7 @@ static struct ObjInlineMarkup {
                string                 _anchor_tag,
     return ref string[][string]       lev4_subtoc,
                ObjGenericComposite[]  the_table_of_contents_section,
-  ) {
+  ) @safe {
     ObjGenericComposite comp_obj_toc;
     mixin InternalMarkup;
     static auto mkup = InlineMarkup();
@@ -5938,7 +5938,7 @@ private:
     string[string]   obj_,
     CMM              conf_make_meta,
     bool             _new_doc,
-  ) {
+  ) @safe {
     if (_new_doc) {
       heading_num = [ 0, 0, 0, 0 ];
       heading_number_auto_composite = "";
@@ -6087,7 +6087,7 @@ private:
     string munge_,
     string lev_,
     bool   _new_doc
-  ) {
+  ) @safe {
     if (!(munge_.match(rgx.heading_anchor_tag))) {
       if (munge_.match(rgx.heading_identify_anchor_tag)) {
         if (auto m = munge_.match(rgx.heading_extract_named_anchor_tag)) {
@@ -6142,7 +6142,7 @@ struct ObjAttributes {
     string              obj_is_,
     string              obj_raw,
     ObjGenericComposite _comp_obj_heading,
-  ) {
+  ) @safe {
     scope(exit) {
       destroy(obj_is_);
       destroy(obj_raw);
@@ -6243,7 +6243,7 @@ struct ObjAttributes {
 
 #+name: meta_emitters_obj_attributes_private_an_attribute
 #+BEGIN_SRC d
-  string txt_heading()(string obj_txt_in) {
+  string txt_heading()(string obj_txt_in) @safe {
     _obj_attributes = " \"use\": \"content\","
     ~ " \"of\": \"para\","
     ~ " \"is\": \"heading\"";
@@ -6257,7 +6257,7 @@ struct ObjAttributes {
 
 #+name: meta_emitters_obj_attributes_private_an_attribute
 #+BEGIN_SRC d
-  string txt_para()(string obj_txt_in) {
+  string txt_para()(string obj_txt_in) @safe {
     _obj_attributes = " \"use\": \"content\","
     ~ " \"of\": \"para\","
     ~ " \"is\": \"para\"";
@@ -6271,7 +6271,7 @@ struct ObjAttributes {
 
 #+name: meta_emitters_obj_attributes_private_an_attribute
 #+BEGIN_SRC d
-  string txt_quote()(string obj_txt_in) {
+  string txt_quote()(string obj_txt_in) @safe {
     _obj_attributes = " \"use\": \"content\","
     ~ " \"of\": \"block\","
     ~ " \"is\": \"quote\"";
@@ -6285,7 +6285,7 @@ struct ObjAttributes {
 
 #+name: meta_emitters_obj_attributes_private_an_attribute
 #+BEGIN_SRC d
-  string txt_group()(string obj_txt_in) {
+  string txt_group()(string obj_txt_in) @safe {
     _obj_attributes = " \"use\": \"content\","
     ~ " \"of\": \"block\","
     ~ " \"is\": \"group\"";
@@ -6299,7 +6299,7 @@ struct ObjAttributes {
 
 #+name: meta_emitters_obj_attributes_private_an_attribute
 #+BEGIN_SRC d
-  string txt_block()(string obj_txt_in) {
+  string txt_block()(string obj_txt_in) @safe {
     _obj_attributes = " \"use\": \"content\","
     ~ " \"of\": \"block\","
     ~ " \"is\": \"block\"";
@@ -6313,7 +6313,7 @@ struct ObjAttributes {
 
 #+name: meta_emitters_obj_attributes_private_an_attribute
 #+BEGIN_SRC d
-  string txt_verse()(string obj_txt_in) {
+  string txt_verse()(string obj_txt_in) @safe {
     _obj_attributes = " \"use\": \"content\","
     ~ " \"of\": \"block\","
     ~ " \"is\": \"verse\"";
@@ -6327,7 +6327,7 @@ struct ObjAttributes {
 
 #+name: meta_emitters_obj_attributes_private_an_attribute
 #+BEGIN_SRC d
-  string txt_code()(string obj_txt_in) {
+  string txt_code()(string obj_txt_in) @safe {
     _obj_attributes = " \"use\": \"content\","
     ~ " \"of\": \"block\","
     ~ " \"is\": \"code\"";
@@ -6341,7 +6341,7 @@ struct ObjAttributes {
 
 #+name: meta_emitters_obj_attributes_private_an_attribute
 #+BEGIN_SRC d
-  string txt_table()(string obj_txt_in) {
+  string txt_table()(string obj_txt_in) @safe {
     _obj_attributes = " \"use\": \"content\","
     ~ " \"of\": \"block\","
     ~ " \"is\": \"table\"";
@@ -6355,7 +6355,7 @@ struct ObjAttributes {
 
 #+name: meta_emitters_obj_attributes_private_an_attribute
 #+BEGIN_SRC d
-  string txt_comment()(string obj_txt_in) {
+  string txt_comment()(string obj_txt_in) @safe {
     _obj_attributes = " \"use\": \"comment\","
     ~ " \"of\": \"comment\","
     ~ " \"is\": \"comment\"";
@@ -6373,7 +6373,7 @@ struct ObjAttributes {
     string              _obj_attrib,
     string              obj_is_,
     ObjGenericComposite _comp_obj_heading,
-  ) {
+  ) @safe {
     JSONValue oa_j = parseJSON(_obj_attrib);
     assert(
       (oa_j.type == JSON_TYPE.OBJECT)
@@ -6416,7 +6416,7 @@ struct BookIndexNuggetHash {
     string bookindex_section,
     N      obj_cite_digits,
     S      tag_in_seg,
-  ) {
+  ) @safe {
     debug(asserts) {
       static assert(is(typeof(obj_cite_digits.object_number) == int));
     }
@@ -6490,7 +6490,7 @@ struct BookIndexReportIndent {
   int mkn, skn;
   void bookindex_report_indented()(
     string[][string][string] bookindex_unordered_hashes
-  ) {
+  ) @safe {
     auto mainkeys
       = bookindex_unordered_hashes.byKey.array.sort().release;
     foreach (mainkey; mainkeys) {
@@ -6531,7 +6531,7 @@ struct BookIndexReportSection {
 #+BEGIN_SRC d
   void bookindex_write_section()(
     string[][string][string] bookindex_unordered_hashes
-  ) {
+  ) @safe {
     auto mainkeys =
       bookindex_unordered_hashes.byKey.array
       .sort!("toUpper(a) < toUpper(b)", SwapStrategy.stable).release;
@@ -6749,7 +6749,7 @@ struct NotesSection {
     ObjGenericComposite[] contents_am,
     string[string]        tag_in_seg,
     int                   cntr,
-  ) {
+  ) @safe {
     assert((contents_am[cntr].metainfo.is_a == "para")
     || (contents_am[cntr].metainfo.is_a     == "heading")
     || (contents_am[cntr].metainfo.is_a     == "quote")
@@ -6831,7 +6831,7 @@ struct NotesSection {
 
 #+name: meta_emitters_endnotes
 #+BEGIN_SRC d
-  private auto gathered_notes() {
+  private auto gathered_notes() @safe {
     string[][string] endnotes_;
     if (object_notes.length > 1) {
       endnotes_["notes"] = (object_notes["notes"].split(rgx.break_string))[0..$-1];
@@ -6851,7 +6851,7 @@ struct NotesSection {
   private auto endnote_objects(N,O)(
     N              obj_cite_digits,
     O              opt_action,
-  ) {
+  ) @safe {
     mixin spineNode;
     ObjGenericComposite[] the_endnotes_section;
     auto endnotes_ = gathered_notes();
@@ -7108,7 +7108,7 @@ struct NodeStructureMetadata {
     int            cntr_,
     int            ptr_,
     string         is_
-  ) {
+  ) @safe {
     debug(asserts) {
       static assert(is(typeof(obj_cite_digits.object_number) == int));
     }
@@ -7176,7 +7176,7 @@ struct NodeStructureMetadata {
     fNr            flag_notes_reg,
     fNs            flag_notes_star,
     fL             flag_links,
-  ) {
+  ) @safe {
     debug(asserts) {
       static assert(is(typeof(lev)                                       == string));
       static assert(is(typeof(obj_cite_digits.object_number)             == int));
@@ -7372,7 +7372,7 @@ struct NodeStructureMetadata {
 pure void assertions_doc_structure()(
   string[string]  an_object,
   int[string]     lv
-) {
+) @safe {
   if (lv["h3"] > State.off) {
     assert(lv["h0"] > State.off);
     assert(lv["h1"] > State.off);
@@ -7550,7 +7550,7 @@ pure void assertions_doc_structure()(
 
 #+name: abs_functions_assertions
 #+BEGIN_SRC d
-pure void assertions_flag_types_block_status_none_or_closed()(int[string] obj_type_status) {
+pure void assertions_flag_types_block_status_none_or_closed()(int[string] obj_type_status) @safe {
   assert(
     (obj_type_status["code"] == TriState.off)
     || (obj_type_status["code"] == TriState.closing),
@@ -7579,7 +7579,7 @@ pure void assertions_flag_types_block_status_none_or_closed()(int[string] obj_ty
 #+name: template_doc_sect_keys_seq
 #+BEGIN_SRC d
 template docSectKeysSeq() {
-  auto docSectKeysSeq(string[][string] document_section_keys_sequenced) {
+  auto docSectKeysSeq(string[][string] document_section_keys_sequenced) @safe {
     struct doc_sect_keys_seq {
       string[] scroll() {
         return document_section_keys_sequenced["scroll"];
diff --git a/org/out_harvest_metadata.org b/org/out_harvest_metadata.org
index d893e26..35b48e9 100644
--- a/org/out_harvest_metadata.org
+++ b/org/out_harvest_metadata.org
@@ -25,7 +25,7 @@ template spineMetaDocHarvest() {
   auto spineMetaDocHarvest(T,H)(
     T  doc_matters,
     H  hvst,
-  ) {
+  ) @safe {
     <<metadoc_harvest_imports>>
     mixin InternalMarkup;
     <<metadoc_harvest_initialize>>
diff --git a/org/out_latex.org b/org/out_latex.org
index 5f2021c..4e0ff3e 100644
--- a/org/out_latex.org
+++ b/org/out_latex.org
@@ -129,7 +129,7 @@ import
 #+BEGIN_SRC d
     auto paper() {
       struct PaperType {
-        auto a4() {
+        auto a4() @safe {
           struct A4 {
             auto portrait() {
               struct V {
@@ -150,7 +150,7 @@ import
           }
           return A4();
         }
-        auto a5() {
+        auto a5() @safe {
           struct A5 {
             auto portrait() {
               struct V {
@@ -171,7 +171,7 @@ import
           }
           return A5();
         }
-        auto b4() {
+        auto b4() @safe {
           struct B4 {
             auto portrait() {
               struct V {
@@ -192,7 +192,7 @@ import
           }
           return B4();
         }
-        auto letter() {
+        auto letter() @safe {
           struct Letter {
             auto portrait() {
               struct V {
@@ -213,7 +213,7 @@ import
           }
           return Letter();
         }
-        auto legal() {
+        auto legal() @safe {
           struct Legal {
             auto portrait() {
               struct V {
@@ -247,7 +247,7 @@ import
 string sp_char_esc(O)(
   string      _txt,
   const    O  obj,
-) {
+) @safe {
   string _unescape_sp_char_esc()(string _txt) {
     _txt = _txt
       .replaceAll(rgx.latex_special_char_escaped,
@@ -275,7 +275,7 @@ string sp_char_esc(O)(
 #+BEGIN_SRC d
 string sp_char_esc_txt()(
   string      _txt,
-) {
+) @safe {
   string _unescape_sp_char_esc()(string _txt) {
     _txt = _txt
       .replaceAll(rgx.latex_special_char_escaped,
@@ -302,7 +302,7 @@ string sp_char_esc_txt()(
 #+BEGIN_SRC d
 string sp_char_esc()(
   string      _txt,
-) {
+) @safe {
   _txt = replaceAll!(m => "\\" ~ m[1])(_txt, rgx.latex_special_char);
   return _txt;
 }
@@ -317,7 +317,7 @@ string sp_char_esc()(
 #+BEGIN_SRC d
 string fontface()(
   string      _txt,
-) {
+) @safe {
 _txt = _txt
   .replaceAll(rgx.inline_emphasis,    format(q"┃\begin{bfseries}%s\end{bfseries}┃", "$1"))
   .replaceAll(rgx.inline_bold,        format(q"┃\begin{bfseries}%s\end{bfseries}┃", "$1"))
@@ -340,7 +340,7 @@ _txt = _txt
 #+BEGIN_SRC d
 string leading_hardspaces()(
   string      _txt,
-) {
+) @safe {
   string hardspaces(string _spaces) {
     _spaces  = _spaces
       .replaceAll(rgx.space, "\\hardspace ");
@@ -355,7 +355,7 @@ string leading_hardspaces()(
 
 #+name: output_latex_shared
 #+BEGIN_SRC d
-string nbsp_char()(string _txt) {
+string nbsp_char()(string _txt) @safe {
   if (_txt.match(rgx.nbsp_char)) {
     _txt  = _txt.replaceAll(rgx.nbsp_char, "\\hardspace ");
   }
@@ -367,7 +367,7 @@ string nbsp_char()(string _txt) {
 
 #+name: output_latex_shared
 #+BEGIN_SRC d
-string nbsp_char_to_space()(string _txt) {
+string nbsp_char_to_space()(string _txt) @safe {
   if (_txt.match(rgx.nbsp_char)) {
     _txt  = _txt.replaceAll(rgx.nbsp_char, " ");
   }
@@ -384,7 +384,7 @@ string links_and_images(O,M)(
   string      _txt,
   const    O  obj,
            M  doc_matters,
-) {
+) @safe {
   if (obj.has.inline_links) { // TODO some images do not have inline links ... image without link
     string _width_adjust(string _width) {
       if (_width.to!int > 300) { _width = "300"; } // will need to vary max with papersize & orientation
@@ -434,7 +434,7 @@ string links_and_images(O,M)(
 #+BEGIN_SRC d
 string footnotes()(
   string      _txt,
-) {
+) @safe {
   if (_txt.match(rgx.inline_notes_al_gen)) {
     string _tex_note = q"┃\hypertarget{noteref_%s}{}\footnote[%s]{%%
 \label{note_%s}%s}┃";
@@ -455,7 +455,7 @@ string footnotes()(
 #+BEGIN_SRC d
 string remove_footnotes()(
   string      _txt,
-) {
+) @safe {
   if (_txt.match(rgx.inline_notes_al_gen)) {
     _txt = replaceAll!(m => "")(_txt, rgx.inline_notes_al_gen);
   }
@@ -471,7 +471,7 @@ string remove_footnotes()(
 string para(O)(
   string      _txt,
   O           obj,
-) {
+) @safe {
   if (obj.metainfo.is_of_type == "para") {
     string _tex_para;
     _tex_para = q"┃\begin{tiny}\hspace{0mm}\end{tiny}{\marginpar{\begin{tiny}\hspace{0mm}\hypertarget{%s}{%s}\end{tiny}}}%s┃";
@@ -492,7 +492,7 @@ string para(O)(
 string bookindex(O)(
   string      _txt,
   O           obj,
-) {
+) @safe {
   if (obj.metainfo.is_of_type == "para"
     && obj.metainfo.is_a == "bookindex"
   ) {
@@ -513,7 +513,7 @@ string bookindex(O)(
 string bullets_and_indentation(O)(
   string      _txt,
   O           obj,
-) {
+) @safe {
   string _tex_para;
   string _hang; string _indent;
   int _paper_margin = -10;
@@ -560,7 +560,7 @@ string bullets_and_indentation(O)(
     O           obj,
     M           doc_matters,
     string      _part = ""
-  ) {
+  ) @safe {
     if (obj.metainfo.is_a == "heading") {
       string _tex_para;
       string _pg_break;
diff --git a/org/out_odt.org b/org/out_odt.org
index 61879a3..59e731c 100644
--- a/org/out_odt.org
+++ b/org/out_odt.org
@@ -89,7 +89,7 @@ template outputODT() {
 
 #+name: odt_format_objects
 #+BEGIN_SRC d
-string _tags(O)(const O obj){
+string _tags(O)(const O obj) @safe {
   string _tags = "";
   if (obj.tags.anchor_tags.length > 0) {
     foreach (tag_; obj.tags.anchor_tags) {
@@ -113,7 +113,7 @@ string _tags(O)(const O obj){
 
 #+name: odt_format_objects
 #+BEGIN_SRC d
-string _xhtml_anchor_tags(O)(O obj) {
+string _xhtml_anchor_tags(O)(O obj) @safe {
   const(string[]) anchor_tags = obj.tags.anchor_tags;
   string tags="";
   if (anchor_tags.length > 0) {
@@ -131,7 +131,7 @@ string _xhtml_anchor_tags(O)(O obj) {
 
 #+name: odt_format_objects
 #+BEGIN_SRC d
-string obj_num(O)(const O obj){ // TODO
+string obj_num(O)(const O obj) @safe { // TODO
   string _on;
   _on = (obj.metainfo.object_number.empty)
   ? ""
@@ -147,7 +147,7 @@ string obj_num(O)(const O obj){ // TODO
 
 #+name: odt_format_objects
 #+begin_src d
-string _footnotes()(string _txt){
+string _footnotes()(string _txt) @safe {
   static auto rgx = Rgx();
   _txt = _txt.replaceAll(
     rgx.inline_notes_al_regular_number_note,
@@ -172,7 +172,7 @@ string _footnotes()(string _txt){
 
 #+name: odt_format_objects
 #+BEGIN_SRC d
-string _bullet(O)(const O obj){
+string _bullet(O)(const O obj) @safe {
   string _b = "";
   if (obj.attrib.bullet) {
     _b = format(q"┃● ┃",);
@@ -185,7 +185,7 @@ string _bullet(O)(const O obj){
 
 #+name: odt_format_objects
 #+BEGIN_SRC d
-string _indent(O)(string _txt, const O obj) { // TODO
+string _indent(O)(string _txt, const O obj) @safe { // TODO
   // if (obj.attrib.indent_base > 0 ||
   //   obj.attrib.indent_hang > 0
   // ) {
@@ -299,7 +299,7 @@ string _indent(O)(string _txt, const O obj) { // TODO
 
 #+name: odt_format_objects
 #+BEGIN_SRC d
-string _block_type_delimiters(O)(string[] _block_lines, const O obj) { // TODO
+string _block_type_delimiters(O)(string[] _block_lines, const O obj) @safe { // TODO
   string _block = "";
   foreach (i, _line; _block_lines) {
     _line = _footnotes(_line);
@@ -340,7 +340,7 @@ string _block_type_delimiters(O)(string[] _block_lines, const O obj) { // TODO
 
 #+name: odt_format_objects
 #+BEGIN_SRC d
-string _special_characters(O)(string _txt, const O obj) {
+string _special_characters(O)(string _txt, const O obj) @safe {
   _txt = _txt
     .replaceAll(rgx.xhtml_ampersand,    "&amp;")
     .replaceAll(rgx.xhtml_quotation,    "&#34;")
@@ -355,7 +355,7 @@ string _special_characters(O)(string _txt, const O obj) {
 
 #+name: odt_format_objects
 #+BEGIN_SRC d
-string _preserve_white_spaces(O)(string _txt, const O obj) {
+string _preserve_white_spaces(O)(string _txt, const O obj) @safe {
   if (obj.metainfo.is_a == "code" || obj.metainfo.is_a == "verse" || obj.metainfo.is_a == "block") {
     _txt = _txt
       .replaceAll(rgx.space,      "&#160;");
@@ -388,9 +388,9 @@ string _font_face(string _txt){
 
 #+name: odt_format_objects
 #+BEGIN_SRC d
-auto _obj_num(O)(O obj) { // NOT USED YET
+auto _obj_num(O)(O obj) @safe { // NOT USED YET
   struct objNum {
-    string reference() {
+    string reference() @safe {
       return format(q"┃<text:span text:style-name="Span_subscript">
     <text:bookmark-start text:name="%s"/>
     <text:bookmark-end text:name="%s"/>
@@ -399,7 +399,7 @@ auto _obj_num(O)(O obj) { // NOT USED YET
         obj.object_number,
       );
     }
-    string display() {
+    string display() @safe {
       return format(q"┃<text:span text:style-name="Span_subscript">
   %s%s%s
   </text:span>┃",
@@ -417,7 +417,7 @@ auto _obj_num(O)(O obj) { // NOT USED YET
 
 #+name: odt_format_objects
 #+BEGIN_SRC d
-string _break_page()() {
+string _break_page()() @safe {
   return format(q"┃
 <text:p text:style-name="P_normal_page_new"/>
 ┃",
@@ -426,7 +426,7 @@ string _break_page()() {
 #+END_SRC
 
 #+BEGIN_SRC d
-string _break_page()() {
+string _break_page()() @safe {
   return format(q"┃
 <text:p text:style-name="P_page_break"> </text:p>
 <text:p text:style-name="P_normal_page_new"/>┃",
@@ -438,7 +438,7 @@ string _break_page()() {
 
 #+name: odt_format_objects
 #+BEGIN_SRC d
-string _empty_line_break(O)(string _txt, const O obj) {
+string _empty_line_break(O)(string _txt, const O obj) @safe {
   if (obj.metainfo.is_a == "code" || obj.metainfo.is_a == "verse" || obj.metainfo.is_a == "block") {
     _txt = _txt
       .replaceAll(rgx.br_empty_line,    "<br />");
@@ -451,7 +451,7 @@ string _empty_line_break(O)(string _txt, const O obj) {
 
 #+name: odt_format_objects
 #+BEGIN_SRC d
-string _links(O)(string _txt, const O obj) {
+string _links(O)(string _txt, const O obj) @safe {
   if (obj.metainfo.is_a != "code") {
     if (obj.metainfo.is_a == "toc") {
       _txt = replaceAll!(m =>
@@ -497,7 +497,7 @@ string _links(O)(string _txt, const O obj) {
 
 #+name: odt_format_objects
 #+BEGIN_SRC d
-string _images(O)(string _txt, const O obj) {
+string _images(O)(string _txt, const O obj) @safe {
   if (_txt.match(rgx.inline_image)) {
     _txt = _txt
       .replaceAll(rgx.inline_image,
@@ -514,7 +514,7 @@ string _images(O)(string _txt, const O obj) {
 
 #+name: odt_format_objects
 #+BEGIN_SRC d
-string markup(O)(const O obj) {
+string markup(O)(const O obj) @safe {
   /+ markup TODO +/
   string _txt = obj.text;
   _txt = _special_characters(_txt, obj);     // TODO & why both obj & obj.text, consider also in output_xmls.org
@@ -539,7 +539,7 @@ string markup(O)(const O obj) {
 string heading(O,M)(
   const        O  obj,
   const        M  doc_matters,
-) {
+) @safe {
   assert(obj.metainfo.is_of_part    == "body" || "frontmatter" || "backmatter");
   assert(obj.metainfo.is_of_section == "body" || "toc" || "endnotes" || "glossary" || "bibliography" || "bookindex" || "blurb");
   assert(obj.metainfo.is_of_type    == "para");
@@ -589,7 +589,7 @@ string heading(O,M)(
 string para(O,M)(
   const        O  obj,
   const        M  doc_matters,
-) {
+) @safe {
   assert(obj.metainfo.is_of_part    == "body" || "frontmatter" || "backmatter");
   assert(obj.metainfo.is_of_section == "body" || "toc" || "endnotes" || "glossary" || "bibliography" || "bookindex" || "blurb");
   assert(obj.metainfo.is_of_type    == "para");
@@ -615,7 +615,7 @@ string para(O,M)(
 string quote(O,M)(
   const        O  obj,
   const        M  doc_matters,
-) {
+) @safe {
   assert(obj.metainfo.is_of_part    == "body");
   assert(obj.metainfo.is_of_section == "body" || "glossary" || "bibliography" || "bookindex" || "blurb");
   assert(obj.metainfo.is_of_type    == "block");
@@ -636,7 +636,7 @@ string quote(O,M)(
 string group(O,M)(
   const        O  obj,
   const        M  doc_matters,
-) {
+) @safe {
   assert(obj.metainfo.is_of_part    == "body");
   assert(obj.metainfo.is_of_section == "body" || "glossary" || "bibliography" || "bookindex" || "blurb");
   assert(obj.metainfo.is_of_type    == "block");
@@ -671,7 +671,7 @@ string group(O,M)(
 string block(O,M)(
   const        O  obj,
   const        M  doc_matters,
-) {
+) @safe {
   assert(obj.metainfo.is_of_part    == "body");
   assert(obj.metainfo.is_of_section == "body" || "glossary" || "bibliography" || "bookindex" || "blurb");
   assert(obj.metainfo.is_of_type    == "block");
@@ -694,7 +694,7 @@ string block(O,M)(
 string verse(O,M)(
   const        O  obj,
   const        M  doc_matters,
-) {
+) @safe {
   assert(obj.metainfo.is_of_part    == "body");
   assert(obj.metainfo.is_of_section == "body" || "glossary" || "bibliography" || "bookindex" || "blurb");
   assert(obj.metainfo.is_of_type    == "block");
@@ -713,7 +713,7 @@ string verse(O,M)(
 string code(O,M)(
   const        O  obj,
   const        M  doc_matters,
-) {
+) @safe {
   assert(obj.metainfo.is_of_part    == "body");
   assert(obj.metainfo.is_of_section == "body");
   assert(obj.metainfo.is_of_type    == "block");
@@ -767,7 +767,7 @@ string code(O,M)(
 auto tablarize(O)(
   const        O    obj,
   string            _txt,
-) {
+) @safe {
   string[] _table_rows = (_txt).split(rgx.table_delimiter_row);
   string[] _table_cols;
   string _table;
@@ -808,7 +808,7 @@ int _table_number = 0;
 string table(O,M)(
   const        O  obj,
   const        M  doc_matters,
-) {
+) @safe {
   assert(obj.metainfo.is_of_part    == "body");
   assert(obj.metainfo.is_of_section == "body");
   assert(obj.metainfo.is_of_type    == "block");
@@ -1011,7 +1011,7 @@ void dirtree(I)(
 
 #+name: output_odt_fixed_mimetype
 #+BEGIN_SRC d
-string mimetype() {
+string mimetype() @safe {
   string mimetype_ = format(q"┃application/vnd.oasis.opendocument.text┃");
   return mimetype_;
 }
@@ -1021,7 +1021,7 @@ string mimetype() {
 
 #+name: output_odt_fixed_manifest_rdf
 #+BEGIN_SRC d
-string manifest_rdf() {
+string manifest_rdf() @safe {
   string _manifest_rdf = format(q"┃<?xml version="1.0" encoding="utf-8"?>
 #+END_SRC
 
@@ -1057,7 +1057,7 @@ string manifest_rdf() {
 
 #+name: output_odt_fixed_settings_xml
 #+BEGIN_SRC d
-string settings_xml() {
+string settings_xml() @safe {
   string _settings_xml = format(q"┃<?xml version="1.0" encoding="UTF-8"?>
 #+END_SRC
 
@@ -1171,7 +1171,7 @@ string settings_xml() {
 
 #+name: output_odt_fixed_styles_xml
 #+BEGIN_SRC d
-string styles_xml() {
+string styles_xml() @safe {
   string _styles_xml = format(q"┃<?xml version="1.0" encoding="UTF-8"?>
 #+END_SRC
 
@@ -2084,7 +2084,7 @@ string styles_xml() {
 
 #+name: output_odt_variable_content_xml
 #+BEGIN_SRC d
-string odt_head(I)(I doc_matters) {
+string odt_head(I)(I doc_matters) @safe {
   string _has_tables = format(q"┃
 #+END_SRC
 
@@ -2226,7 +2226,7 @@ string odt_head(I)(I doc_matters) {
 string odt_body(D,I)(
   const D    doc_abstraction,
         I    doc_matters,
-) {
+) @safe {
   mixin formatODT;
   auto odt_format = formatODT();
   string delimit = "";
@@ -2390,7 +2390,7 @@ string odt_body(D,I)(
 
 #+name: output_odt_variable_content_xml
 #+BEGIN_SRC d
-string odt_tail() {
+string odt_tail() @safe {
   string _odt_tail = format(q"┃<text:p text:style-name="P_normal">spine: &lt;<text:a xl:type="simple" xl:href="http://www.doc_reform.org">www.doc_reform.org</text:a>&gt; and &lt;<text:a xl:type="simple" xl:href="http://www.sisudoc.org">www.sisudoc.org</text:a>&gt;</text:p>
 </office:text></office:body></office:document-content>┃",);
   return _odt_tail;
@@ -2404,7 +2404,7 @@ string odt_tail() {
 string content_xml(D,I)(
   const D    doc_abstraction,
         I    doc_matters,
-) {
+) @safe {
   string _content_xml;
   string break_line = (doc_matters.opt.action.debug_do) ? "\n" : "";
   string odt_break_page = format(q"┃<text:p text:style-name="P_normal_page_new"/>┃",);
@@ -2424,7 +2424,7 @@ string content_xml(D,I)(
 #+BEGIN_SRC d
 string manifest_xml(M)(
   auto ref              M    doc_matters,
-) {
+) @safe {
   string _bullet = format(q"┃<manifest:file-entry manifest:media-type="" manifest:full-path="Pictures/bullet_09.png"/>┃");
   string[] _images = [ _bullet ];
   foreach (image; doc_matters.srcs.image_list) {
@@ -2462,7 +2462,7 @@ _images.join("\n"),
 #+BEGIN_SRC d
 string meta_xml(M)(
   auto ref              M    doc_matters,
-) {
+) @safe {
   /+ (meta_xml includes output time-stamp) +/
   string _meta_xml = format(q"┃<?xml version="1.0" encoding="UTF-8"?>
 #+END_SRC
@@ -2496,7 +2496,7 @@ doc_matters.generated_time,
 #+BEGIN_SRC d
 void images_cp(M)(
   auto ref              M    doc_matters,
-) {
+) @safe {
   { /+ (copy odt images) +/
     auto pth_odt = spinePathsODT!()(doc_matters);
     foreach (image; doc_matters.srcs.image_list) {
diff --git a/org/out_xmls.org b/org/out_xmls.org
index e875330..52a0ac1 100644
--- a/org/out_xmls.org
+++ b/org/out_xmls.org
@@ -61,7 +61,7 @@ import
 string div_delimit(
              string  part,
   return ref string  previous_part
-){
+) @safe {
   string delimit = "";
   string delimit_ = "";
   if (part != previous_part) {
@@ -94,7 +94,7 @@ string div_delimit(
 
 #+name: xhtml_format_objects
 #+BEGIN_SRC d
-string special_characters_text(string _txt){
+string special_characters_text(string _txt) @safe {
   _txt = _txt
     .replaceAll(rgx.xhtml_ampersand,    "&#38;")
     .replaceAll(rgx.xhtml_quotation,    "&#34;")
@@ -111,7 +111,7 @@ string special_characters_text(string _txt){
 #+BEGIN_SRC d
 string special_characters(O)(
   const  O         obj,
-){
+) @safe {
   string _txt = special_characters_text(obj.text);
   if (!(obj.metainfo.is_a == "code")) {
     _txt = (_txt)
@@ -125,7 +125,7 @@ string special_characters(O)(
 
 #+name: xhtml_format_objects
 #+BEGIN_SRC d
-string font_face(string _txt){
+string font_face(string _txt) @safe {
   _txt = _txt
     .replaceAll(rgx.inline_emphasis,    ("<em>$1</em>"))
     .replaceAll(rgx.inline_bold,        ("<b>$1</b>"))
@@ -145,7 +145,7 @@ string font_face(string _txt){
 
 #+name: xhtml_format_objects
 #+BEGIN_SRC d
-string _xhtml_anchor_tags(O)(O obj) {
+string _xhtml_anchor_tags(O)(O obj) @safe {
   const(string[]) anchor_tags = obj.tags.anchor_tags;
   string tags="";
   if (anchor_tags.length > 0) {
@@ -166,7 +166,7 @@ string _xhtml_anchor_tags(O)(O obj) {
 #+BEGIN_SRC d
 string header_metadata(M)(
   M  doc_matters,
-) {
+) @safe {
   string _publisher="Publisher"; // TODO
   string o;
   o = format(q"┃<!-- spine header metadata -->
@@ -209,7 +209,7 @@ string header_metadata(M)(
 #+BEGIN_SRC d
 string site_info_button(M)(
   M  doc_matters,
-) {
+) @safe {
   string _locations;
   if (doc_matters.conf_make_meta.make.home_button_text.length > 0) {
     _locations = (doc_matters.conf_make_meta.make.home_button_text)
@@ -239,7 +239,7 @@ string site_info_button(M)(
 #+BEGIN_SRC d
 string inline_search_form(M)(
   M  doc_matters,
-) {
+) @safe {
   string _action="http://www.sisudoc.org/cgi-bin/search.cgi";
   string _db="spine.7a.manual";
   string o;
@@ -281,7 +281,7 @@ string inline_search_form(M)(
 string html_head(M)(
   M  doc_matters,
   string type,
-) {
+) @safe {
 string _manifest = "";
 if (doc_matters.opt.action.workon) {
   _manifest = format(q"┃
@@ -341,7 +341,7 @@ if (doc_matters.opt.action.workon) {
 #+BEGIN_SRC d
 string epub3_seg_head(M)(
   M  doc_matters,
-) {
+) @safe {
   string html_base = format(q"┃<!DOCTYPE html>
 <html>┃",
 );
@@ -413,7 +413,7 @@ string epub3_seg_head(M)(
 
 #+name: xhtml_format_objects
 #+BEGIN_SRC d
-string tail() {
+string tail() @safe {
   string o;
   o = format(q"┃
   <a name="bottom" id="bottom"></a>
@@ -435,7 +435,7 @@ string inline_images(O,M)(
                M  doc_matters,
   string          _suffix    = ".html",
   string          _xml_type = "seg",
-) {
+) @safe {
   string _img_pth;
   if (_xml_type == "epub") {
     _img_pth = "image/";
@@ -469,7 +469,7 @@ string inline_links(O,M)(
                M  doc_matters,
   string         _suffix   = ".html",
   string         _xml_type = "seg",
-) {
+) @safe {
   string seg_lvs;
   if (obj.has.inline_links) {
     if  (obj.metainfo.is_a != "code") {
@@ -565,7 +565,7 @@ string inline_notes_scroll(O,M)(
   string          _txt,
   const        O  obj,
                M  doc_matters,
-) {
+) @safe {
   if (obj.has.inline_notes_reg) {
     _txt = font_face(_txt);
     _txt = _txt.replaceAll(
@@ -602,7 +602,7 @@ auto inline_notes_seg(O,M)(
   string          _txt,
   const        O  obj,
                M  doc_matters,
-) {
+) @safe {
   string[] _endnotes;
   if (obj.has.inline_notes_star) {
     _txt = font_face(_txt);
@@ -674,7 +674,7 @@ string inline_markup_scroll(O,M)(
   const        O  obj,
                M  doc_matters,
   string          _suffix = ".html",
-) {
+) @safe {
   if (obj.metainfo.dummy_heading
     && (obj.metainfo.is_a == "toc" || obj.metainfo.is_a == "heading")) {
     _txt = "";
@@ -697,7 +697,7 @@ auto inline_markup_seg(O,M)(
                M  doc_matters,
   string          _suffix = ".html",
   string          _xml_type = "seg",
-) {
+) @safe {
   if (obj.metainfo.dummy_heading
     && ((_xml_type == "epub"
     && (obj.metainfo.is_a == "toc" || obj.metainfo.is_a == "heading"))
@@ -721,7 +721,7 @@ auto inline_markup_seg(O,M)(
 string lev4_heading_subtoc(O,M)(
   const        O  obj,
                M  doc_matters,
-) {
+) @safe {
   char[] lev4_subtoc;
   lev4_subtoc ~= "  <div class=\"nav\">\n";
   foreach (subtoc; obj.tags.lev4_subtoc) {
@@ -754,7 +754,7 @@ string lev4_heading_subtoc(O,M)(
 auto nav_pre_next_svg(O,M)(
   const        O  obj,
                M  doc_matters,
-) {
+) @safe {
   string prev, next, toc;
   string harvest_link = (doc_matters.opt.action.harvest_link)
   ? format(q"┃<p class="tiny">[<a href="../../../topics.html">&nbsp;T&nbsp;</a>|<a href="../../../authors.html">&nbsp;A&nbsp;</a>]</p>┃")
@@ -848,7 +848,7 @@ string heading(O,M)(
   const O      obj,
         M      doc_matters,
   string            _xml_type = "html",
-) {
+) @safe {
   assert(obj.metainfo.is_of_part    == "body" || "frontmatter" || "backmatter");
   assert(obj.metainfo.is_of_section == "body" || "toc" || "endnotes" || "glossary" || "bibliography" || "bookindex" || "blurb");
   assert(obj.metainfo.is_of_type    == "para");
@@ -919,7 +919,7 @@ string heading_scroll(O,M)(
   const        O  obj,
                M  doc_matters,
   string          _suffix = ".html",
-) {
+) @safe {
   _txt = inline_markup_scroll(_txt, obj, doc_matters, _suffix);
   string o = heading(_txt, obj, doc_matters);
   return o;
@@ -936,7 +936,7 @@ auto heading_seg(O,M)(
                M  doc_matters,
   string          _suffix = ".html",
   string          _xml_type = "html",
-) {
+) @safe {
   auto t = inline_markup_seg(_txt, obj, doc_matters, _suffix, _xml_type);
   _txt = t[0];
   string[] _endnotes = t[1];
@@ -958,7 +958,7 @@ string para(O,M)(
         string _txt,
   const O      obj,
         M      doc_matters,
-) {
+) @safe {
   assert(obj.metainfo.is_of_part    == "body" || "frontmatter" || "backmatter");
   assert(obj.metainfo.is_of_section == "body" || "toc" || "endnotes" || "glossary" || "bibliography" || "bookindex" || "blurb");
   assert(obj.metainfo.is_of_type    == "para");
@@ -1011,7 +1011,7 @@ string para_scroll(O,M)(
   const        O  obj,
                M  doc_matters,
   string          _suffix = ".html",
-) {
+) @safe {
   if (obj.metainfo.is_a == "toc" && _txt.match(rgx.inline_link_toc_to_backmatter)) {
     _txt = _txt.replaceAll(rgx.inline_link_toc_to_backmatter, "┤#section_$1├");
   }
@@ -1031,7 +1031,7 @@ auto para_seg(O,M)(
                M  doc_matters,
   string          _suffix = ".html",
   string          _xml_type = "html",
-) {
+) @safe {
   auto t = inline_markup_seg(_txt, obj, doc_matters, _suffix, _xml_type);
   _txt = t[0].to!string;
   string[] _endnotes = t[1];
@@ -1053,7 +1053,7 @@ string quote(O,M)(
         string _txt,
   const O      obj,
         M      doc_matters,
-) {
+) @safe {
   assert(obj.metainfo.is_of_part    == "body");
   assert(obj.metainfo.is_of_section == "body" || "glossary" || "bibliography" || "bookindex" || "blurb");
   assert(obj.metainfo.is_of_type    == "block");
@@ -1096,7 +1096,7 @@ string quote_scroll(O,M)(
   const        O  obj,
                M  doc_matters,
   string          _suffix = ".html",
-) {
+) @safe {
   _txt = inline_markup_scroll(_txt, obj, doc_matters, _suffix);
   string o = quote(_txt, obj, doc_matters);
   return o;
@@ -1113,7 +1113,7 @@ auto quote_seg(O,M)(
                M  doc_matters,
   string          _suffix = ".html",
   string          _xml_type = "html",
-) {
+) @safe {
   auto t = inline_markup_seg(_txt, obj, doc_matters, _suffix, _xml_type);
   _txt = t[0].to!string;
   string[] _endnotes = t[1];
@@ -1135,7 +1135,7 @@ string group(O,M)(
         string _txt,
   const O      obj,
         M      doc_matters,
-) {
+) @safe {
   assert(obj.metainfo.is_of_part    == "body");
   assert(obj.metainfo.is_of_section == "body" || "glossary" || "bibliography" || "bookindex" || "blurb");
   assert(obj.metainfo.is_of_type    == "block");
@@ -1179,7 +1179,7 @@ string group_scroll(O,M)(
                M  doc_matters,
   string          _suffix = ".html",
   string          _xml_type = "html",
-) {
+) @safe {
   _txt = inline_markup_scroll(_txt, obj, doc_matters, _suffix);
   string o = group(_txt, obj, doc_matters);
   return o;
@@ -1196,7 +1196,7 @@ auto group_seg(O,M)(
                M  doc_matters,
   string          _suffix = ".html",
   string          _xml_type = "html",
-) {
+) @safe {
   auto t = inline_markup_seg(_txt, obj, doc_matters, _suffix, _xml_type);
   _txt = t[0].to!string;
   string[] _endnotes = t[1];
@@ -1218,7 +1218,7 @@ string block(O,M)(
         string _txt,
   const O      obj,
         M      doc_matters,
-) {
+) @safe {
   assert(obj.metainfo.is_of_part    == "body");
   assert(obj.metainfo.is_of_section == "body" || "glossary" || "bibliography" || "bookindex" || "blurb");
   assert(obj.metainfo.is_of_type    == "block");
@@ -1258,7 +1258,7 @@ string block_scroll(O,M)(
                M  doc_matters,
   string          _suffix = ".html",
   string          _xml_type = "html",
-) {
+) @safe {
   _txt = inline_markup_scroll(_txt, obj, doc_matters, _suffix);
   string o = block(_txt, obj, doc_matters);
   return o;
@@ -1275,7 +1275,7 @@ auto block_seg(O,M)(
                M  doc_matters,
   string          _suffix = ".html",
   string          _xml_type = "html",
-) {
+) @safe {
   auto t = inline_markup_seg(_txt, obj, doc_matters, _suffix, _xml_type);
   _txt = t[0].to!string;
   string[] _endnotes = t[1];
@@ -1297,7 +1297,7 @@ string verse(O,M)(
         string _txt,
   const O      obj,
         M      doc_matters,
-) {
+) @safe {
   assert(obj.metainfo.is_of_part    == "body");
   assert(obj.metainfo.is_of_section == "body" || "glossary" || "bibliography" || "bookindex" || "blurb");
   assert(obj.metainfo.is_of_type    == "block");
@@ -1337,7 +1337,7 @@ string verse_scroll(O,M)(
                M  doc_matters,
   string          _suffix = ".html",
   string          _xml_type = "html",
-) {
+) @safe {
   _txt = inline_markup_scroll(_txt, obj, doc_matters, _suffix);
   string o = verse(_txt, obj, doc_matters);
   return o;
@@ -1354,7 +1354,7 @@ auto verse_seg(O,M)(
                M  doc_matters,
   string          _suffix = ".html",
   string          _xml_type = "html",
-) {
+) @safe {
   auto t = inline_markup_seg(_txt, obj, doc_matters, _suffix, _xml_type);
   _txt = t[0].to!string;
   string[] _endnotes = t[1];
@@ -1375,7 +1375,7 @@ string code(O,M)(
         string _txt,
   const O      obj,
         M      doc_matters,
-) {
+) @safe {
   assert(obj.metainfo.is_of_part    == "body");
   assert(obj.metainfo.is_of_section == "body");
   assert(obj.metainfo.is_of_type    == "block");
@@ -1446,7 +1446,7 @@ align="left|right|center"
 auto tablarize(O)(
   string            _txt,
   const        O    obj,
-) {
+) @safe {
   string[] _table_rows = (_txt).split(rgx.table_delimiter_row);
   string[] _table_cols;
   string _table;
@@ -1486,7 +1486,7 @@ string table(O,M)(
         string _txt,
   const O      obj,
         M      doc_matters,
-) {
+) @safe {
   assert(obj.metainfo.is_of_part    == "body");
   assert(obj.metainfo.is_of_section == "body");
   assert(obj.metainfo.is_of_type    == "block");
@@ -1541,7 +1541,7 @@ template outputHTML() {
 void scroll(D,M)(
   const        D    doc_abstraction,
                M    doc_matters,
-) {
+) @safe {
   mixin spineOutputRgxInit;
   auto xhtml_format = outputXHTMLs();
   auto rgx = Rgx();
@@ -1747,7 +1747,7 @@ void scroll(D,M)(
 void scroll_write_output(D,M)(
   D doc,
   M doc_matters,
-) {
+) @trusted {
   debug(asserts) {
     static assert(is(typeof(doc)    == string[]));
   }
@@ -1777,7 +1777,7 @@ void scroll_write_output(D,M)(
 void seg(D,M)(
   const D    doc_abstraction,
         M    doc_matters,
-) {
+) @safe {
   mixin spineOutputRgxInit;
   auto rgx = Rgx();
   auto xhtml_format = outputXHTMLs();
@@ -2079,7 +2079,7 @@ void seg_write_output(D,E,M)(
   D doc_html,
   E doc_html_endnotes,
   M doc_matters,
-) {
+) @trusted { // @system?
   debug(asserts) {
     static assert(is(typeof(doc_html)      == string[][string]));
   }
@@ -2115,7 +2115,7 @@ void seg_write_output(D,E,M)(
 
 #+name: output_html_css
 #+BEGIN_SRC d
-void css(M)(M doc_matters) {
+void css(M)(M doc_matters) @safe {
   auto css = spineCss(doc_matters);
   auto pth_html = spinePathsHTML!()(doc_matters.output_path, doc_matters.src.language);
   try {
@@ -2138,7 +2138,7 @@ void css(M)(M doc_matters) {
 #+BEGIN_SRC d
 void images_cp(M)(
   M    doc_matters,
-) {
+) @trusted { // @system
   { /+ (copy html images) +/
 
     auto pth_html = spinePathsHTML!()(doc_matters.output_path, doc_matters.src.language);
@@ -2205,7 +2205,7 @@ template outputEPub3() {
 
 #+name: output_epub3_fixed
 #+BEGIN_SRC d
-string epub3_mimetypes() {
+string epub3_mimetypes() @safe {
   string o;
   o = format(q"┃application/epub+zip┃") ~ "\n";
   return o;
@@ -2218,7 +2218,7 @@ string epub3_mimetypes() {
 
 #+name: output_epub3_fixed
 #+BEGIN_SRC d
-string epub3_container_xml() {
+string epub3_container_xml() @safe {
   string o;
   o = format(q"┃<?xml version='1.0' encoding='utf-8'?>┃") ~ "\n";
   o ~= format(q"┃<container version="1.0"
@@ -2240,7 +2240,7 @@ xmlns="urn:oasis:names:tc:opendocument:xmlns:container">
 
 #+name: output_epub3_constructs
 #+BEGIN_SRC d
-string epub3_oebps_content(D,M,P)(D doc_abstraction, M doc_matters, P parts) {
+string epub3_oebps_content(D,M,P)(D doc_abstraction, M doc_matters, P parts) @safe {
   auto xhtml_format = outputXHTMLs();
   auto pth_epub3 = spinePathsEPUB!()(doc_matters.output_path, doc_matters.src.language);
   string _uuid = "18275d951861c77f78acd05672c9906924c59f18a2e0ba06dad95959693e9bd8"; // TODO sort uuid in doc_matters!
@@ -2346,7 +2346,7 @@ string epub3_oebps_content(D,M,P)(D doc_abstraction, M doc_matters, P parts) {
 
 #+name: output_epub3_constructs
 #+BEGIN_SRC d
-string epub3_oebps_toc_nav_xhtml(D,I)(D doc_abstraction, I doc_matters) {
+string epub3_oebps_toc_nav_xhtml(D,I)(D doc_abstraction, I doc_matters) @safe {
   enum DomTags { none, open, close, close_and_open, open_still, }
   auto markup = InlineMarkup();
   auto rgx = Rgx();
@@ -2434,7 +2434,7 @@ string epub3_oebps_toc_nav_xhtml(D,I)(D doc_abstraction, I doc_matters) {
 
 #+name: output_epub3_constructs
 #+BEGIN_SRC d
-string epub2_oebps_toc_ncx(D,I)(D doc_abstraction, I doc_matters) {
+string epub2_oebps_toc_ncx(D,I)(D doc_abstraction, I doc_matters) @safe {
   int counter = 0;
   string _uuid = "18275d951861c77f78acd05672c9906924c59f18a2e0ba06dad95959693e9bd8"; // TODO shared elsewhere
   auto markup = InlineMarkup();
@@ -2533,7 +2533,7 @@ string epub2_oebps_toc_ncx(D,I)(D doc_abstraction, I doc_matters) {
 void outputEPub3(D,I)(
   const D    doc_abstraction,
         I    doc_matters,
-) {
+) { // @trusted
   mixin spineOutputRgxInit;
   auto xhtml_format = outputXHTMLs();
   auto rgx = Rgx();
@@ -2890,7 +2890,7 @@ void outputEPub3(D,I)(
 void epub3_write_output_files(W,M)(
   W epub_write,
   M doc_matters,
-) {
+) { // @trusted
   debug(asserts) {
     static assert(is(typeof(epub_write.doc_epub3)              == string[][string]));
     static assert(is(typeof(epub_write.mimetypes)              == string));
diff --git a/org/out_xmls_css.org b/org/out_xmls_css.org
index 104dc34..d827e30 100644
--- a/org/out_xmls_css.org
+++ b/org/out_xmls_css.org
@@ -28,7 +28,7 @@
 module doc_reform.io_out.xmls_css;
 template spineCss() {
   import std.format;
-  auto spineCss(M)(M doc_matters) {
+  auto spineCss(M)(M doc_matters) @safe {
 <<css_insert_shared_insert_variable_indent_values>>
 <<css_insert_shared_insert_variable_ocn_color_values>>
     string _css_light_html_seg = format(q"┃
@@ -79,7 +79,7 @@ template spineCss() {
     _css_indent,
     _color_ocn_dark,
 );
-    auto css_() {
+    auto css_() @safe {
       struct _CSS {
         string html_seg    = "/* spine css html seg stylesheet */\n";
         string html_scroll = "/* spine css html scroll stylesheet */\n";
diff --git a/org/spine.org b/org/spine.org
index 848dfcd..256311d 100644
--- a/org/spine.org
+++ b/org/spine.org
@@ -28,7 +28,7 @@ struct Version {
   int minor;
   int patch;
 }
-enum _ver = Version(0, 9, 1);
+enum _ver = Version(0, 9, 2);
 #+END_SRC
 
 ** compilation restrictions (supported compilers)
@@ -60,7 +60,7 @@ version (Posix) {
   - process file
   - output
 
-** 0. spine src/spine                                   :template:
+** 0. spine src/spine                                             :template:
 
 - process files (act according to requirements of each type)
   - by sourcefilename
@@ -458,16 +458,16 @@ if (helpInfo.helpWanted) {
 #+BEGIN_SRC d
 enum outTask { source_or_pod, sqlite, sqlite_multi, latex, odt, epub, html_scroll, html_seg, html_stuff }
 struct OptActions {
-  bool assertions() {
+  bool assertions() @trusted {
     return opts["assertions"];
   }
-  bool concordance() {
+  bool concordance() @trusted {
     return opts["concordance"];
   }
   auto config_path_set() {
     return settings["config"];
   }
-  bool css_theme_default() {
+  bool css_theme_default() @trusted {
     bool _is_light;
     if (opts["light"] || opts["theme-light"]) {
       _is_light = true;
@@ -478,94 +478,94 @@ struct OptActions {
     }
     return _is_light;
   }
-  bool debug_do() {
+  bool debug_do() @trusted {
     return opts["debug"];
   }
-  bool digest() {
+  bool digest() @trusted {
     return opts["digest"];
   }
-  bool epub() {
+  bool epub() @trusted {
     return opts["epub"];
   }
-  bool harvest_link() {
+  bool harvest_link() @trusted {
     return (opts["harvest-link"]) ? true : false;
   }
-  bool harvest() {
+  bool harvest() @trusted {
     return (opts["harvest"] || opts["harvest-authors"] || opts["harvest-topics"]) ? true : false;
   }
-  bool harvest_authors() {
+  bool harvest_authors() @trusted {
     return (opts["harvest"] || opts["harvest-authors"]) ? true : false;
   }
-  bool harvest_topics() {
+  bool harvest_topics() @trusted {
     return (opts["harvest"] || opts["harvest-topics"]) ? true : false;
   }
-  bool html() {
+  bool html() @trusted {
     return (opts["html"] || opts["html-seg"] || opts["html-scroll"]) ? true : false;
   }
-  bool html_seg() {
+  bool html_seg() @trusted {
     return (opts["html"] || opts["html-seg"]) ? true : false;
   }
-  bool html_scroll() {
+  bool html_scroll() @trusted {
     return (opts["html"] || opts["html-scroll"]) ? true : false;
   }
-  bool html_stuff() {
+  bool html_stuff() @trusted {
     return (opts["html"] || opts["html-scroll"] || opts["html-seg"]) ? true : false;
   }
-  bool latex() {
+  bool latex() @trusted {
     return (opts["latex"] || opts["pdf"]) ? true : false;
   }
-  bool odt() {
+  bool odt() @trusted {
     return (opts["odf"] || opts["odt"]) ? true : false;
   }
-  bool manifest() {
+  bool manifest() @trusted {
     return opts["manifest"];
   }
-  bool ocn_hidden() {
+  bool ocn_hidden() @trusted {
     return opts["hide-ocn"];
   }
-  bool ocn_off() {
+  bool ocn_off() @trusted {
     return opts["ocn-off"];
   }
-  bool quiet() {
+  bool quiet() @trusted {
     return opts["quiet"];
   }
-  bool pod() {
+  bool pod() @trusted {
     return opts["pod"];
   }
-  bool show_summary() {
+  bool show_summary() @trusted {
     return opts["show-summary"];
   }
-  bool show_make() {
+  bool show_make() @trusted {
     return opts["show-make"];
   }
-  bool show_metadata() {
+  bool show_metadata() @trusted {
     return opts["show-metadata"];
   }
-  bool show_config() {
+  bool show_config() @trusted {
     return opts["show-config"];
   }
-  bool source() {
+  bool source() @trusted {
     return opts["source"];
   }
-  bool source_or_pod() {
+  bool source_or_pod() @trusted {
     return (opts["pod"] || opts["source"]) ? true : false;
   }
-  bool sqlite_discrete() {
+  bool sqlite_discrete() @trusted {
     return opts["sqlite-discrete"];
   }
-  bool sqlite_db_drop() {
+  bool sqlite_db_drop() @trusted {
     return (opts["sqlite-db-recreate"] || opts["sqlite-db-drop"]) ? true : false;
   }
-  bool sqlite_db_create() {
+  bool sqlite_db_create() @trusted {
     return (opts["sqlite-db-recreate"] || opts["sqlite-db-create"]) ? true : false;
   }
-  bool sqlite_delete() {
+  bool sqlite_delete() @trusted {
     return opts["sqlite-delete"];
   }
-  bool sqlite_update() {
+  bool sqlite_update() @trusted {
     return (opts["sqlite-update"] || opts["sqlite-insert"]) ? true : false;
   }
-  bool sqlite_shared_db_action() {
+  bool sqlite_shared_db_action() @trusted {
     return (
       opts["sqlite-db-recreate"]
       || opts["sqlite-db-create"]
@@ -574,46 +574,46 @@ struct OptActions {
       || opts["sqlite-update"]
     ) ? true : false;
   }
-  bool text() {
+  bool text() @trusted {
     return opts["text"];
   }
-  bool verbose() {
+  bool verbose() @trusted {
     return (opts["verbose"] || opts["very-verbose"]) ? true : false;
   }
-  bool very_verbose() {
+  bool very_verbose() @trusted {
     return opts["very-verbose"];
   }
-  bool xhtml() {
+  bool xhtml() @trusted {
     return opts["xhtml"];
   }
-  bool section_toc() {
+  bool section_toc() @trusted {
     return opts["section_toc"];
   }
-  bool section_body() {
+  bool section_body() @trusted {
     return opts["section_body"];
   }
-  bool section_endnotes() {
+  bool section_endnotes() @trusted {
     return opts["section_endnotes"];
   }
-  bool section_glossary() {
+  bool section_glossary() @trusted {
     return opts["section_glossary"];
   }
-  bool section_biblio() {
+  bool section_biblio() @trusted {
     return opts["section_biblio"];
   }
-  bool section_bookindex() {
+  bool section_bookindex() @trusted {
     return opts["section_bookindex"];
   }
-  bool section_blurb() {
+  bool section_blurb() @trusted {
     return opts["section_blurb"];
   }
-  bool backmatter() {
+  bool backmatter() @trusted {
     return opts["backmatter"];
   }
-  bool skip_output() {
+  bool skip_output() @trusted {
     return opts["skip-output"];
   }
-  bool workon() {
+  bool workon() @trusted {
     return opts["workon"];
   }
   auto languages_set() {
@@ -625,7 +625,7 @@ struct OptActions {
   auto sqlite_filename() {
     return settings["sqlite-filename"];
   }
-  bool parallelise() {
+  bool parallelise() @trusted {
     bool _is;
     if (opts["parallel"] == true) {
       _is = true;
@@ -649,7 +649,7 @@ struct OptActions {
     } else { _is = false; }
     return _is;
   }
-  bool parallelise_subprocesses() {
+  bool parallelise_subprocesses() @trusted {
     return opts["parallel-subprocesses"];
   }
   auto output_task_scheduler() {
@@ -680,7 +680,7 @@ struct OptActions {
     }
     return schedule.sort().uniq;
   }
-  bool abstraction() {
+  bool abstraction() @trusted {
     return (
       opts["abstraction"]
       || concordance
@@ -696,7 +696,7 @@ struct OptActions {
       || sqlite_update
     ) ? true : false;
   }
-  bool meta_processing_general() {
+  bool meta_processing_general() @trusted {
     return (
       opts["abstraction"]
       || html
@@ -707,7 +707,7 @@ struct OptActions {
       || sqlite_update
     ) ? true :false;
   }
-  bool meta_processing_xml_dom() {
+  bool meta_processing_xml_dom() @trusted {
     return (
       opts["abstraction"]
       || html
@@ -1354,7 +1354,7 @@ struct DocumentMatters {
       string ver() {
         return program_info.ver;
       }
-      string name_and_version() {
+      string name_and_version() @trusted {
         return format(
           "%s-%s",
           name,