dlang safe default imminent, look ahead

- @safe @trusted & @system, reconsider @trusted

11 files changed, 190 insertions, 187 deletions

diff --git a/src/doc_reform/io_out/create_zip_file.d b/src/doc_reform/io_out/create_zip_file.d
index 09b481a..0ad8ada 100644
--- a/src/doc_reform/io_out/create_zip_file.d
+++ b/src/doc_reform/io_out/create_zip_file.d
@@ -4,7 +4,7 @@ template createZipFile() {
   import std.outbuffer;
   import std.string;
   import std.zip;
-  void createZipFile(
+  @safe void createZipFile(
     string zip_file_name,
     void[] compressed_zip_data,
   ) {
diff --git a/src/doc_reform/io_out/defaults.d b/src/doc_reform/io_out/defaults.d
index 4dd8021..84bac73 100644
--- a/src/doc_reform/io_out/defaults.d
+++ b/src/doc_reform/io_out/defaults.d
@@ -50,7 +50,7 @@ template InternalMarkup() {
 template spineLanguageCodes() {
   /+ language codes +/
   struct Lang {
-    static string[string][string] codes() {
+    @safe static string[string][string] codes() {
       auto _lang_codes = [
         "am":    [ "c": "am",    "n": "Amharic",           "t": "Amharic",                   "xlp": "amharic"      ],
         "bg":    [ "c": "bg",    "n": "Bulgarian",         "t": "Български (Bəlgarski)",     "xlp": "bulgarian"    ],
@@ -117,15 +117,15 @@ template spineLanguageCodes() {
       ];
       return _lang_codes;
     }
-    static string[] code_arr_ptr() {
+    @safe static string[] code_arr_ptr() {
       string[] _lang_codes = ["am", "bg", "bn", "br", "ca", "cs", "cy", "da", "de", "el", "en", "eo", "es", "et", "eu", "fi", "fr", "ga", "gl", "he", "hi", "hr", "hy", "ia", "is", "it", "ja", "ko", "la", "lo", "lt", "lv", "ml", "mr", "nl", "no", "nn", "oc", "pl", "pt", "pt_BR", "ro", "ru", "sa", "se", "sk", "sl", "sq", "sr", "sv", "ta", "te", "th", "tk", "tr", "uk", "ur", "us", "vi", "zh", "en", "xx",];
       return _lang_codes;
     }
-    static string[] code_arr() {
+    @safe static string[] code_arr() {
       string[] _lang_codes = ["am", "bg", "bn", "br", "ca", "cs", "cy", "da", "de", "el", "en", "eo", "es", "et", "eu", "fi", "fr", "ga", "gl", "he", "hi", "hr", "hy", "ia", "is", "it", "ja", "ko", "la", "lo", "lt", "lv", "ml", "mr", "nl", "no", "nn", "oc", "pl", "pt", "pt_BR", "ro", "ru", "sa", "se", "sk", "sl", "sq", "sr", "sv", "ta", "te", "th", "tk", "tr", "uk", "ur", "vi", "zh"];
       return _lang_codes;
     }
-    static auto codes_() {
+    @safe static auto codes_() {
       return "(" ~ join(code_arr,"|") ~ ")";
     }
     static auto codes_regex() {
diff --git a/src/doc_reform/io_out/epub3.d b/src/doc_reform/io_out/epub3.d
index 4de98a1..f8f5ba4 100644
--- a/src/doc_reform/io_out/epub3.d
+++ b/src/doc_reform/io_out/epub3.d
@@ -14,12 +14,12 @@ template outputEPub3() {
     doc_reform.io_out.xmls_css;
   mixin InternalMarkup;
   mixin outputXHTMLs;
-  string epub3_mimetypes() @safe {
+  @safe string epub3_mimetypes() {
     string o;
     o = format(q"┃application/epub+zip┃") ~ "\n";
     return o;
   }
-  string epub3_container_xml() @safe {
+  @safe string epub3_container_xml() {
     string o;
     o = format(q"┃<?xml version='1.0' encoding='utf-8'?>┃") ~ "\n";
     o ~= format(q"┃<container version="1.0"
@@ -30,7 +30,7 @@ template outputEPub3() {
   </rootfiles>┃") ~ "\n</container>\n";
     return o;
   }
-  string epub3_oebps_content(D,M,P)(D doc_abstraction, M doc_matters, P parts) @safe {
+  @safe string epub3_oebps_content(D,M,P)(D doc_abstraction, M doc_matters, P parts) {
     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!
@@ -128,7 +128,7 @@ template outputEPub3() {
     }
     return content;
   }
-  string epub3_oebps_toc_nav_xhtml(D,I)(D doc_abstraction, I doc_matters) @safe {
+  @safe string epub3_oebps_toc_nav_xhtml(D,I)(D doc_abstraction, I doc_matters) {
     enum DomTags { none, open, close, close_and_open, open_still, }
     auto markup = InlineMarkup();
     static auto rgx = Rgx();
@@ -207,7 +207,7 @@ template outputEPub3() {
   </html>\n";
     return toc;
   }
-  string epub2_oebps_toc_ncx(D,I)(D doc_abstraction, I doc_matters) @safe {
+  @safe string epub2_oebps_toc_ncx(D,I)(D doc_abstraction, I doc_matters) {
     int counter = 0;
     string _uuid = "18275d951861c77f78acd05672c9906924c59f18a2e0ba06dad95959693e9bd8"; // TODO shared elsewhere
     auto markup = InlineMarkup();
@@ -297,10 +297,10 @@ template outputEPub3() {
     return toc;
   }
   
-  void outputEPub3(D,I)(
+  @system void outputEPub3(D,I)(
     const D    doc_abstraction,
           I    doc_matters,
-  ) { // @trusted
+  ) {
     mixin spineOutputRgxInit;
     auto xhtml_format = outputXHTMLs();
     static auto rgx = Rgx();
@@ -606,10 +606,10 @@ template outputEPub3() {
     epubWrite.oebps_content_opf =      doc_abstraction.epub3_oebps_content(doc_matters, oepbs_content_parts);
     epubWrite.epub3_write_output_files(doc_matters);
   }
-  void epub3_write_output_files(W,M)(
+  @system 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/src/doc_reform/io_out/html.d b/src/doc_reform/io_out/html.d
index 8598ca5..637b007 100644
--- a/src/doc_reform/io_out/html.d
+++ b/src/doc_reform/io_out/html.d
@@ -13,10 +13,10 @@ template outputHTML() {
     doc_reform.io_out.xmls,
     doc_reform.io_out.xmls_css;
   mixin outputXHTMLs;
-  void scroll(D,M)(
+  @safe void scroll(D,M)(
     const        D    doc_abstraction,
                  M    doc_matters,
-  ) @safe {
+  ) {
     mixin spineOutputRgxInit;
     auto xhtml_format = outputXHTMLs();
     static auto rgx = Rgx();
@@ -183,10 +183,10 @@ template outputHTML() {
     doc = xhtml_format.html_head(doc_matters, "scroll") ~ doc_html ~ xhtml_format.tail;
     scroll_write_output(doc, doc_matters);
   }
-  void scroll_write_output(D,M)(
+  @trusted void scroll_write_output(D,M)(
     D doc,
     M doc_matters,
-  ) @trusted {
+  ) {
     debug(asserts) {
       static assert(is(typeof(doc)    == string[]));
     }
@@ -206,10 +206,10 @@ template outputHTML() {
       writeln(" ", pth_html.fn_scroll(doc_matters.src.filename));
     }
   }
-  void seg(D,M)(
+  @safe void seg(D,M)(
     const D    doc_abstraction,
           M    doc_matters,
-  ) @safe {
+  ) {
     mixin spineOutputRgxInit;
     static auto rgx = Rgx();
     auto xhtml_format = outputXHTMLs();
@@ -459,11 +459,11 @@ template outputHTML() {
     }
     seg_write_output(doc_html, doc_html_endnotes, doc_matters);
   }
-  void seg_write_output(D,E,M)(
+  @trusted void seg_write_output(D,E,M)( // @system?
     D doc_html,
     E doc_html_endnotes,
     M doc_matters,
-  ) @trusted { // @system?
+  ) {
     debug(asserts) {
       static assert(is(typeof(doc_html)      == string[][string]));
     }
@@ -493,7 +493,7 @@ template outputHTML() {
       writeln(" ", pth_html.fn_seg(doc_matters.src.filename, "toc"));
     }
   }
-  void css(M)(M doc_matters) @safe {
+  @safe void css(M)(M doc_matters) {
     auto css = spineCss(doc_matters);
     auto pth_html = spinePathsHTML!()(doc_matters.output_path, doc_matters.src.language);
     try {
@@ -508,9 +508,9 @@ template outputHTML() {
       // Handle error
     }
   }
-  void images_cp(M)(
+  @trusted void images_cp(M)( // @system
     M    doc_matters,
-  ) @trusted { // @system
+  ) {
     { /+ (copy html images) +/
   
       auto pth_html = spinePathsHTML!()(doc_matters.output_path, doc_matters.src.language);
diff --git a/src/doc_reform/io_out/hub.d b/src/doc_reform/io_out/hub.d
index a43c28a..df3d28c 100644
--- a/src/doc_reform/io_out/hub.d
+++ b/src/doc_reform/io_out/hub.d
@@ -11,7 +11,10 @@ template outputHub() {
     doc_reform.io_out.create_zip_file,
     doc_reform.io_out.paths_output;
   import std.parallelism;
-  void outputHub(D,I)(const D doc_abstraction, I doc_matters) {
+  @system void outputHub(D,I)(
+    const D doc_abstraction,
+    I doc_matters
+  ) {
     mixin spineOutputRgxInit;
     mixin Msg;
     auto msg = Msg!()(doc_matters);
@@ -114,7 +117,7 @@ template outputHubOp() {
     doc_reform.io_out.odt,
     doc_reform.io_out.create_zip_file,
     doc_reform.io_out.paths_output;
-  void outputHubOp(E,O)(E env, O opt_action) {
+  @system void outputHubOp(E,O)(E env, O opt_action) {
     mixin spineOutputRgxInit;
     static auto rgx = Rgx();
     if ((opt_action.sqlite_db_drop)) {
diff --git a/src/doc_reform/io_out/latex.d b/src/doc_reform/io_out/latex.d
index cfa347c..b8e33f4 100644
--- a/src/doc_reform/io_out/latex.d
+++ b/src/doc_reform/io_out/latex.d
@@ -14,7 +14,7 @@ template outputLaTeX() {
   auto lang = Lang();
       auto paper() {
         struct PaperType {
-          auto a4() @safe {
+          @safe auto a4() {
             struct A4 {
               auto portrait() {
                 struct V {
@@ -35,7 +35,7 @@ template outputLaTeX() {
             }
             return A4();
           }
-          auto a5() @safe {
+          @safe auto a5() {
             struct A5 {
               auto portrait() {
                 struct V {
@@ -56,7 +56,7 @@ template outputLaTeX() {
             }
             return A5();
           }
-          auto b4() @safe {
+          @safe auto b4() {
             struct B4 {
               auto portrait() {
                 struct V {
@@ -77,7 +77,7 @@ template outputLaTeX() {
             }
             return B4();
           }
-          auto letter() @safe {
+          @safe auto letter() {
             struct Letter {
               auto portrait() {
                 struct V {
@@ -98,7 +98,7 @@ template outputLaTeX() {
             }
             return Letter();
           }
-          auto legal() @safe {
+          @safe auto legal() {
             struct Legal {
               auto portrait() {
                 struct V {
@@ -122,10 +122,10 @@ template outputLaTeX() {
         }
         return PaperType();
       }
-  string sp_char_esc(O)(
+  @safe 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,
@@ -147,9 +147,9 @@ template outputLaTeX() {
     }
     return _txt;
   }
-  string sp_char_esc_txt()(
+  @safe string sp_char_esc_txt()(
     string      _txt,
-  ) @safe {
+  ) {
     string _unescape_sp_char_esc()(string _txt) {
       _txt = _txt
         .replaceAll(rgx.latex_special_char_escaped,
@@ -169,9 +169,9 @@ template outputLaTeX() {
     _txt = replaceAll!(m => _unescape_fontface_esc(m[0]))(_txt, rgx.latex_identify_inline_fontface);
     return _txt;
   }
-  string fontface()(
+  @safe 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"))
@@ -185,9 +185,9 @@ template outputLaTeX() {
     .replaceAll(rgx.inline_italics,     format(q"┃``%s''┃",                           "$1"));
     return _txt;
   }
-  string leading_hardspaces()(
+  @safe string leading_hardspaces()(
     string      _txt,
-  ) @safe {
+  ) {
     string hardspaces(string _spaces) {
       _spaces  = _spaces
         .replaceAll(rgx.space, "\\hardspace ");
@@ -196,23 +196,23 @@ template outputLaTeX() {
     _txt = replaceAll!(m => hardspaces(m[0]))(_txt, rgx.spaces_line_start);
     return _txt;
   }
-  string nbsp_char()(string _txt) @safe {
+  @safe string nbsp_char()(string _txt) {
     if (_txt.match(rgx.nbsp_char)) {
       _txt  = _txt.replaceAll(rgx.nbsp_char, "\\hardspace ");
     }
     return _txt;
   }
-  string nbsp_char_to_space()(string _txt) @safe {
+  @safe string nbsp_char_to_space()(string _txt) {
     if (_txt.match(rgx.nbsp_char)) {
       _txt  = _txt.replaceAll(rgx.nbsp_char, " ");
     }
     return _txt;
   }
-  string links_and_images(O,M)(
+  @safe 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
@@ -253,9 +253,9 @@ template outputLaTeX() {
     }
     return _txt;
   }
-  string footnotes()(
+  @safe 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}┃";
@@ -268,18 +268,18 @@ template outputLaTeX() {
     }
     return _txt;
   }
-  string remove_footnotes()(
+  @safe string remove_footnotes()(
     string      _txt,
-  ) @safe {
+  ) {
     if (_txt.match(rgx.inline_notes_al_gen)) {
       _txt = replaceAll!(m => "")(_txt, rgx.inline_notes_al_gen);
     }
     return _txt;
   }
-  string para(O)(
+  @safe 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┃";
@@ -291,10 +291,10 @@ template outputLaTeX() {
     }
     return _txt;
   }
-  string bookindex(O)(
+  @safe string bookindex(O)(
     string      _txt,
     O           obj,
-  ) @safe {
+  ) {
     if (obj.metainfo.is_of_type == "para"
       && obj.metainfo.is_a == "bookindex"
     ) {
@@ -306,12 +306,12 @@ template outputLaTeX() {
     }
     return _txt;
   }
-  string heading(O,M)(
+  @safe string heading(O,M)(
     string      _txt,
     O           obj,
     M           doc_matters,
     string      _part = ""
-  ) @safe {
+  ) {
     if (obj.metainfo.is_a == "heading") {
       string _tex_para;
       string _pg_break;
@@ -641,10 +641,10 @@ string table(O,M)(
   }
   return _txt;
 }
-  string bullets_and_indentation(O)(
+  @safe string bullets_and_indentation(O)(
     string      _txt,
     O           obj,
-  ) @safe {
+  ) {
     string _tex_para;
     string _hang; string _indent;
     int _paper_margin = -10;
diff --git a/src/doc_reform/io_out/metadata.d b/src/doc_reform/io_out/metadata.d
index 8201926..5dfdfe2 100644
--- a/src/doc_reform/io_out/metadata.d
+++ b/src/doc_reform/io_out/metadata.d
@@ -1,6 +1,6 @@
 module doc_reform.io_out.metadata;
 template outputMetadata() {
-  void outputMetadata(T)( T  doc_matters) @safe {
+  @safe void outputMetadata(T)( T  doc_matters) {
     import std.file;
     import std.format;
     import doc_reform.io_out;
@@ -185,7 +185,7 @@ string theme_light_1 = format(q"┃
   doc_matters.opt.action.css_theme_default ? theme_light_0 : theme_dark_0,
   doc_matters.opt.action.css_theme_default ? theme_light_1 : theme_dark_1,
 ) ~ "\n";
-    void metadata_write_output(M)(M doc_matters, string[] metadata_) @trusted {
+    @safe void metadata_write_output(M)(M doc_matters, string[] metadata_) {
       auto pth_html = spinePathsHTML!()(doc_matters.output_path, doc_matters.src.language);
       try {
         if (!exists(pth_html.base)) {
diff --git a/src/doc_reform/io_out/odt.d b/src/doc_reform/io_out/odt.d
index 23eb947..67b34ba 100644
--- a/src/doc_reform/io_out/odt.d
+++ b/src/doc_reform/io_out/odt.d
@@ -15,7 +15,7 @@ template formatODT() {
   mixin spineOutputRgxInit;
   struct formatODT {
     static auto rgx = Rgx();
-    string _tags(O)(const O obj) @safe {
+    @safe string _tags(O)(const O obj) {
       string _tags = "";
       if (obj.tags.anchor_tags.length > 0) {
         foreach (tag_; obj.tags.anchor_tags) {
@@ -33,7 +33,7 @@ template formatODT() {
       }
       return _tags;
     }
-    string _xhtml_anchor_tags(O)(O obj) @safe {
+    @safe string _xhtml_anchor_tags(O)(O obj) {
       const(string[]) anchor_tags = obj.tags.anchor_tags;
       string tags="";
       if (anchor_tags.length > 0) {
@@ -45,7 +45,7 @@ template formatODT() {
       }
       return tags;
     }
-    string obj_num(O)(const O obj) @safe { // TODO
+    @safe string obj_num(O)(const O obj) { // TODO
       string _on;
       _on = (obj.metainfo.object_number.empty)
       ? ""
@@ -55,7 +55,7 @@ template formatODT() {
         ));
       return _on;
     }
-    string _footnotes()(string _txt) @safe {
+    @safe string _footnotes()(string _txt) {
       static auto rgx = Rgx();
       _txt = _txt.replaceAll(
         rgx.inline_notes_al_regular_number_note,
@@ -74,14 +74,14 @@ template formatODT() {
       );
       return _txt;
     }
-    string _bullet(O)(const O obj) @safe {
+    @safe string _bullet(O)(const O obj) {
       string _b = "";
       if (obj.attrib.bullet) {
         _b = format(q"┃● ┃",);
       }
       return _b;
     }
-    string _indent(O)(string _txt, const O obj) @safe { // TODO
+    @safe string _indent(O)(string _txt, const O obj) { // TODO
       // if (obj.attrib.indent_base > 0 ||
       //   obj.attrib.indent_hang > 0
       // ) {
@@ -189,7 +189,7 @@ template formatODT() {
       }
       return _txt;
     }
-    string _block_type_delimiters(O)(string[] _block_lines, const O obj) @safe { // TODO
+    @safe string _block_type_delimiters(O)(string[] _block_lines, const O obj) { // TODO
       string _block = "";
       foreach (i, _line; _block_lines) {
         _line = _footnotes(_line);
@@ -222,7 +222,7 @@ template formatODT() {
         obj_num(obj));
       return _block;
     }
-    string _special_characters(O)(string _txt, const O obj) @safe {
+    @safe string _special_characters(O)(string _txt, const O obj) {
       _txt = _txt
         .replaceAll(rgx.xhtml_ampersand,    "&amp;")
         .replaceAll(rgx.xhtml_quotation,    "&#34;")
@@ -231,7 +231,7 @@ template formatODT() {
         .replaceAll(rgx.nbsp_char,          "&#160;");
       return _txt;
     }
-    string _preserve_white_spaces(O)(string _txt, const O obj) @safe {
+    @safe string _preserve_white_spaces(O)(string _txt, const O obj) {
       if (obj.metainfo.is_a == "code" || obj.metainfo.is_a == "verse" || obj.metainfo.is_a == "block") {
         _txt = _txt
           .replaceAll(rgx.space,      "&#160;");
@@ -252,9 +252,9 @@ template formatODT() {
         .replaceAll(rgx.inline_mono,        format(q"┃<text:span text:style-name="Span_monospace">%s</text:span>┃",  "$1"));
       return _txt;
     }
-    auto _obj_num(O)(O obj) @safe { // NOT USED YET
+    @safe auto _obj_num(O)(O obj) { // NOT USED YET
       struct objNum {
-        string reference() @safe {
+        @safe string reference() {
           return format(q"┃<text:span text:style-name="Span_subscript">
         <text:bookmark-start text:name="%s"/>
         <text:bookmark-end text:name="%s"/>
@@ -263,7 +263,7 @@ template formatODT() {
             obj.object_number,
           );
         }
-        string display() @safe {
+        @safe string display() {
           return format(q"┃<text:span text:style-name="Span_subscript">
       %s%s%s
       </text:span>┃",
@@ -275,20 +275,20 @@ template formatODT() {
       }
       return objNum();
     }
-    string _break_page()() @safe {
+    @safe string _break_page()() {
       return format(q"┃
     <text:p text:style-name="P_normal_page_new"/>
     ┃",
       );
     }
-    string _empty_line_break(O)(string _txt, const O obj) @safe {
+    @safe string _empty_line_break(O)(string _txt, const O obj) {
       if (obj.metainfo.is_a == "code" || obj.metainfo.is_a == "verse" || obj.metainfo.is_a == "block") {
         _txt = _txt
           .replaceAll(rgx.br_empty_line,    "<br />");
       }
       return _txt;
     }
-    string _links(O)(string _txt, const O obj) @safe {
+    @safe string _links(O)(string _txt, const O obj) {
       if (obj.metainfo.is_a != "code") {
         if (obj.metainfo.is_a == "toc") {
           _txt = replaceAll!(m =>
@@ -328,7 +328,7 @@ template formatODT() {
       }
       return _txt;
     }
-    string _images(O)(string _txt, const O obj) @safe {
+    @safe string _images(O)(string _txt, const O obj) {
       if (_txt.match(rgx.inline_image)) {
         _txt = _txt
           .replaceAll(rgx.inline_image,
@@ -339,7 +339,7 @@ template formatODT() {
       }
       return _txt;
     }
-    string markup(O)(const O obj) @safe {
+    @safe string markup(O)(const O obj) {
       /+ markup TODO +/
       string _txt = obj.text;
       _txt = _special_characters(_txt, obj);     // TODO & why both obj & obj.text, consider also in output_xmls.org
@@ -353,10 +353,10 @@ template formatODT() {
       _txt = _empty_line_break(_txt, obj);       // (obj.metainfo.is_a == "code" || obj.metainfo.is_a == "verse" || obj.metainfo.is_a == "block")
       return _txt;
     }
-    string heading(O,M)(
+    @safe 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");
@@ -397,10 +397,10 @@ template formatODT() {
       }
       return _o_txt_odt;
     }
-    string para(O,M)(
+    @safe 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");
@@ -416,10 +416,10 @@ template formatODT() {
       }
       return _o_txt_odt;
     }
-    string quote(O,M)(
+    @safe 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");
@@ -428,10 +428,10 @@ template formatODT() {
       _o_txt_odt = _footnotes(_o_txt_odt); // decide
       return _o_txt_odt;
     }
-    string group(O,M)(
+    @safe 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");
@@ -446,10 +446,10 @@ template formatODT() {
       _o_txt_odt = _block_type_delimiters(_block_lines, obj);
       return _o_txt_odt;
     }
-    string block(O,M)(
+    @safe 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");
@@ -459,10 +459,10 @@ template formatODT() {
       _o_txt_odt = _block_type_delimiters(_block_lines, obj);
       return _o_txt_odt;
     }
-    string verse(O,M)(
+    @safe 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");
@@ -472,10 +472,10 @@ template formatODT() {
       _o_txt_odt = _block_type_delimiters(_block_lines, obj);
       return _o_txt_odt;
     }
-    string code(O,M)(
+    @safe 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");
@@ -519,10 +519,10 @@ template formatODT() {
       _o_txt_odt = _block;
       return _o_txt_odt;
     }
-    Tuple!(string, string) tablarize(O)(
+    @safe Tuple!(string, string) tablarize(O)(
       const        O    obj,
       string            _txt,
-    ) @safe {
+    ) {
       string[] _table_rows = (_txt).split(rgx.table_delimiter_row);
       string[] _table_cols;
       string _table;
@@ -554,10 +554,10 @@ template formatODT() {
       return t;
     }
     int _table_number = 0;
-    string table(O,M)(
+    @safe 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");
@@ -606,7 +606,7 @@ template outputODT() {
   mixin spineOutputRgxInit;
   static auto rgx = Rgx();
   // mixin outputXmlODT;
-  string odt_head(I)(I doc_matters) @safe {
+  @safe string odt_head(I)(I doc_matters) {
     string _has_tables = format(q"┃
     <style:style style:name="Table1" style:family="table">
       <style:table-properties style:width="16.999cm" table:align="margins"/>
@@ -714,10 +714,10 @@ template outputODT() {
   );
     return _odt_head;
   }
-  string odt_body(D,I)(
+  @safe string odt_body(D,I)(
     const D    doc_abstraction,
           I    doc_matters,
-  ) @safe {
+  ) {
     mixin formatODT;
     auto odt_format = formatODT();
     string delimit = "";
@@ -840,15 +840,15 @@ template outputODT() {
     return doc_odt;
   }
   
-  string odt_tail() @safe {
+  @safe string odt_tail() {
     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;
   }
-  string content_xml(D,I)(
+  @safe 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"/>┃",);
@@ -858,9 +858,9 @@ template outputODT() {
     _content_xml ~= odt_tail;
     return _content_xml;
   }
-  string manifest_xml(M)(
+  @safe 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) {
@@ -882,9 +882,9 @@ template outputODT() {
   );
     return _manifest_xml;
   }
-  void images_cp(M)(
+  @safe 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) {
@@ -902,9 +902,9 @@ template outputODT() {
     }
     // return 0;
   }
-  string meta_xml(M)(
+  @safe 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"?>
   <office:document-meta xmlns:office="urn:oasis:names:tc:opendocument:xmlns:office:1.0" xmlns:xl="http://www.w3.org/1999/xlink" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:meta="urn:oasis:names:tc:opendocument:xmlns:meta:1.0" xmlns:ooo="http://openoffice.org/2004/office" xmlns:grddl="http://www.w3.org/2003/g/data-view#" office:version="1.2">
@@ -939,11 +939,11 @@ template outputODT() {
     }
     // return 0;
   }
-  string mimetype() @safe {
+  @safe string mimetype() {
     string mimetype_ = format(q"┃application/vnd.oasis.opendocument.text┃");
     return mimetype_;
   }
-  string manifest_rdf() @safe {
+  @safe string manifest_rdf() {
     string _manifest_rdf = format(q"┃<?xml version="1.0" encoding="utf-8"?>
   <rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#">
     <rdf:Description rdf:about="styles.xml">
@@ -965,7 +965,7 @@ template outputODT() {
   ┃");
     return _manifest_rdf;
   }
-  string settings_xml() @safe {
+  @safe string settings_xml() {
     string _settings_xml = format(q"┃<?xml version="1.0" encoding="UTF-8"?>
   <office:document-settings xmlns:office="urn:oasis:names:tc:opendocument:xmlns:office:1.0" xmlns:xl="http://www.w3.org/1999/xlink" xmlns:config="urn:oasis:names:tc:opendocument:xmlns:config:1.0" xmlns:ooo="http://openoffice.org/2004/office" office:version="1.2">
     <office:settings>
@@ -1065,7 +1065,7 @@ template outputODT() {
   ┃");
     return _settings_xml;
   }
-  string styles_xml() @safe {
+  @safe string styles_xml() {
     string _styles_xml = format(q"┃<?xml version="1.0" encoding="UTF-8"?>
   <office:document-styles xmlns:office="urn:oasis:names:tc:opendocument:xmlns:office:1.0" xmlns:style="urn:oasis:names:tc:opendocument:xmlns:style:1.0" xmlns:text="urn:oasis:names:tc:opendocument:xmlns:text:1.0" xmlns:table="urn:oasis:names:tc:opendocument:xmlns:table:1.0" xmlns:draw="urn:oasis:names:tc:opendocument:xmlns:drawing:1.0" xmlns:fo="urn:oasis:names:tc:opendocument:xmlns:xsl-fo-compatible:1.0" xmlns:xl="http://www.w3.org/1999/xlink" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:meta="urn:oasis:names:tc:opendocument:xmlns:meta:1.0" xmlns:number="urn:oasis:names:tc:opendocument:xmlns:datastyle:1.0" xmlns:svg="urn:oasis:names:tc:opendocument:xmlns:svg-compatible:1.0" xmlns:chart="urn:oasis:names:tc:opendocument:xmlns:chart:1.0" xmlns:dr3d="urn:oasis:names:tc:opendocument:xmlns:dr3d:1.0" xmlns:math="http://www.w3.org/1998/Math/MathML" xmlns:form="urn:oasis:names:tc:opendocument:xmlns:form:1.0" xmlns:script="urn:oasis:names:tc:opendocument:xmlns:script:1.0" xmlns:ooo="http://openoffice.org/2004/office" xmlns:ooow="http://openoffice.org/2004/writer" xmlns:oooc="http://openoffice.org/2004/calc" xmlns:dom="http://www.w3.org/2001/xml-events" xmlns:rpt="http://openoffice.org/2005/report" xmlns:of="urn:oasis:names:tc:opendocument:xmlns:of:1.2" xmlns:xhtml="http://www.w3.org/1999/xhtml" xmlns:grddl="http://www.w3.org/2003/g/data-view#" xmlns:tableooo="http://openoffice.org/2009/table" xmlns:css3t="http://www.w3.org/TR/css3-text/" office:version="1.2">
     <office:font-face-decls>
diff --git a/src/doc_reform/io_out/source_pod.d b/src/doc_reform/io_out/source_pod.d
index 31c0b45..59746de 100644
--- a/src/doc_reform/io_out/source_pod.d
+++ b/src/doc_reform/io_out/source_pod.d
@@ -23,7 +23,7 @@ template spinePod() {
     auto lang = Lang();
     static auto rgx = Rgx();
     assert (doc_matters.src.filename.match(rgx.src_fn));
-    auto pod_archive(Z)(
+    @system auto pod_archive(Z)(
       string _source_type,
       string _data_in,
       string _pth_out,
diff --git a/src/doc_reform/io_out/xmls.d b/src/doc_reform/io_out/xmls.d
index 1d58e27..1b038a9 100644
--- a/src/doc_reform/io_out/xmls.d
+++ b/src/doc_reform/io_out/xmls.d
@@ -15,10 +15,10 @@ template outputXHTMLs() {
   mixin spineOutputRgxInit;
   struct outputXHTMLs {
     static auto rgx = Rgx();
-    string div_delimit(
+    @safe string div_delimit(
                  string  part,
       return ref string  previous_part
-    ) @safe {
+    ) {
       string delimit = "";
       string delimit_ = "";
       if (part != previous_part) {
@@ -45,7 +45,7 @@ template outputXHTMLs() {
       // you also need to close the last div, introduce a footer?
       return delimit;
     }
-    string special_characters_text(string _txt) @safe {
+    @safe string special_characters_text(string _txt) {
       _txt = _txt
         .replaceAll(rgx.xhtml_ampersand,    "&#38;")
         .replaceAll(rgx.xhtml_quotation,    "&#34;")
@@ -54,9 +54,9 @@ template outputXHTMLs() {
         .replaceAll(rgx.nbsp_char,          " ");
       return _txt;
     }
-    string special_characters(O)(
+    @safe string special_characters(O)(
       const  O         obj,
-    ) @safe {
+    ) {
       string _txt = special_characters_text(obj.text);
       if (!(obj.metainfo.is_a == "code")) {
         _txt = (_txt)
@@ -64,7 +64,7 @@ template outputXHTMLs() {
       }
       return _txt;
     }
-    string font_face(string _txt) @safe {
+    @safe string font_face(string _txt) {
       _txt = _txt
         .replaceAll(rgx.inline_emphasis,    ("<em>$1</em>"))
         .replaceAll(rgx.inline_bold,        ("<b>$1</b>"))
@@ -78,7 +78,7 @@ template outputXHTMLs() {
         .replaceAll(rgx.inline_cite,        ("<cite>$1</cite>"));
       return _txt;
     }
-    string _xhtml_anchor_tags(O)(O obj) @safe {
+    @safe string _xhtml_anchor_tags(O)(O obj) {
       const(string[]) anchor_tags = obj.tags.anchor_tags;
       string tags="";
       if (anchor_tags.length > 0) {
@@ -90,9 +90,9 @@ template outputXHTMLs() {
       }
       return tags;
     }
-    string header_metadata(M)(
+    @safe string header_metadata(M)(
       M  doc_matters,
-    ) @safe {
+    ) {
       string _publisher="Publisher"; // TODO
       string o;
       o = format(q"┃<!-- spine DocReform header metadata -->
@@ -127,9 +127,9 @@ template outputXHTMLs() {
       );
       return o;
     }
-    string site_info_button(M)(
+    @safe 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)
@@ -151,9 +151,9 @@ template outputXHTMLs() {
       );
       return o;
     }
-    string inline_search_form(M)(
+    @safe 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;
@@ -182,7 +182,7 @@ template outputXHTMLs() {
       }
       return o;
     }
-    string html_head(M)(
+    @safe string html_head(M)(
       M  doc_matters,
       string type,
     ) {
@@ -232,9 +232,9 @@ template outputXHTMLs() {
       );
       return o;
     }
-    string epub3_seg_head(M)(
+    @safe string epub3_seg_head(M)(
       M  doc_matters,
-    ) @safe {
+    ) {
       string html_base = format(q"┃<!DOCTYPE html>
     <html>┃",
     );
@@ -300,7 +300,7 @@ template outputXHTMLs() {
       );
       return o;
     }
-    string tail() @safe {
+    @safe string tail() {
       string o;
       o = format(q"┃
       <a name="bottom" id="bottom"></a>
@@ -309,13 +309,13 @@ template outputXHTMLs() {
     </html>┃");
       return o;
     }
-    string inline_images(O,M)(
+    @safe string inline_images(O,M)(
       string          _txt,
       const        O  obj,
                    M  doc_matters,
       string          _suffix    = ".html",
       string          _xml_type = "seg",
-    ) @safe {
+    ) {
       string _img_pth;
       switch (_xml_type) {
       case "epub":   _img_pth = "image/";                           break;
@@ -335,13 +335,13 @@ template outputXHTMLs() {
       }
       return _txt;
     }
-    string inline_links(O,M)(
+    @safe string inline_links(O,M)(
       string          _txt,
       const        O  obj,
                    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") {
@@ -426,11 +426,11 @@ template outputXHTMLs() {
       }
       return _txt;
     }
-    string inline_notes_scroll(O,M)(
+    @safe 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(
@@ -457,11 +457,11 @@ template outputXHTMLs() {
       }
       return _txt;
     }
-    Tuple!(string, string[]) inline_notes_seg(O,M)(
+    @safe Tuple!(string, string[]) 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);
@@ -521,12 +521,12 @@ template outputXHTMLs() {
       );
       return t;
     }
-    string inline_markup_scroll(O,M)(
+    @safe string inline_markup_scroll(O,M)(
       string          _txt,
       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 = "";
@@ -537,13 +537,13 @@ template outputXHTMLs() {
       }
       return _txt;
     }
-    auto inline_markup_seg(O,M)(
+    @safe auto inline_markup_seg(O,M)(
       string          _txt,
       const        O  obj,
                    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"))
@@ -557,10 +557,10 @@ template outputXHTMLs() {
       Tuple!(string, string[]) t = inline_notes_seg(_txt, obj, doc_matters);
       return t;
     }
-    string lev4_heading_subtoc(O,M)(
+    @safe 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) {
@@ -584,10 +584,10 @@ template outputXHTMLs() {
       lev4_subtoc ~= "  </div>\n";
       return lev4_subtoc.to!string;
     }
-    auto nav_pre_next_svg(O,M)(
+    @safe auto nav_pre_next_svg(O,M)(
       const        O  obj,
                    M  doc_matters,
-    ) @safe {
+    ) {
       string prev, next, toc;
       if (obj.tags.segment_anchor_tag_epub == "toc") {
         toc = "";
@@ -660,12 +660,12 @@ template outputXHTMLs() {
       }
       return bar();
     }
-    string heading(O,M)(
+    @safe string heading(O,M)(
             string _txt,
       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");
@@ -725,23 +725,23 @@ template outputXHTMLs() {
       }
       return o;
     }
-    string heading_scroll(O,M)(
+    @safe string heading_scroll(O,M)(
       string          _txt,
       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;
     }
-    Tuple!(string, string[]) heading_seg(O,M)(
+    @safe Tuple!(string, string[]) heading_seg(O,M)(
       string          _txt,
       const        O  obj,
                    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];
@@ -752,11 +752,11 @@ template outputXHTMLs() {
       );
       return u;
     }
-    string para(O,M)(
+    @safe 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");
@@ -802,12 +802,12 @@ template outputXHTMLs() {
       }
       return o;
     }
-    string para_scroll(O,M)(
+    @safe string para_scroll(O,M)(
       string          _txt,
       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├");
       }
@@ -815,13 +815,13 @@ template outputXHTMLs() {
       string o = para(_txt, obj, doc_matters);
       return o;
     }
-    Tuple!(string, string[]) para_seg(O,M)(
+    @safe Tuple!(string, string[]) para_seg(O,M)(
       string          _txt,
       const        O  obj,
                    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];
@@ -832,11 +832,11 @@ template outputXHTMLs() {
       );
       return u;
     }
-    string quote(O,M)(
+    @safe 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");
@@ -868,23 +868,23 @@ template outputXHTMLs() {
       }
       return o;
     }
-    string quote_scroll(O,M)(
+    @safe string quote_scroll(O,M)(
       string          _txt,
       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;
     }
-    Tuple!(string, string[]) quote_seg(O,M)(
+    @safe Tuple!(string, string[]) quote_seg(O,M)(
       string          _txt,
       const        O  obj,
                    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];
@@ -895,11 +895,11 @@ template outputXHTMLs() {
       );
       return u;
     }
-    string group(O,M)(
+    @safe 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");
@@ -931,24 +931,24 @@ template outputXHTMLs() {
       }
       return o;
     }
-    string group_scroll(O,M)(
+    @safe string group_scroll(O,M)(
       string          _txt,
       const        O  obj,
                    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;
     }
-    Tuple!(string, string[]) group_seg(O,M)(
+    @safe Tuple!(string, string[]) group_seg(O,M)(
       string          _txt,
       const        O  obj,
                    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];
@@ -959,11 +959,11 @@ template outputXHTMLs() {
       );
       return u;
     }
-    string block(O,M)(
+    @safe 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");
@@ -991,24 +991,24 @@ template outputXHTMLs() {
       }
       return o;
     }
-    string block_scroll(O,M)(
+    @safe string block_scroll(O,M)(
       string          _txt,
       const        O  obj,
                    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;
     }
-    Tuple!(string, string[]) block_seg(O,M)(
+    @safe Tuple!(string, string[]) block_seg(O,M)(
       string          _txt,
       const        O  obj,
                    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];
@@ -1019,11 +1019,11 @@ template outputXHTMLs() {
       );
       return u;
     }
-    string verse(O,M)(
+    @safe 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");
@@ -1051,24 +1051,24 @@ template outputXHTMLs() {
       }
       return o;
     }
-    string verse_scroll(O,M)(
+    @safe string verse_scroll(O,M)(
       string          _txt,
       const        O  obj,
                    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;
     }
-    Tuple!(string, string[]) verse_seg(O,M)(
+    @safe Tuple!(string, string[]) verse_seg(O,M)(
       string          _txt,
       const        O  obj,
                    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];
@@ -1079,10 +1079,10 @@ template outputXHTMLs() {
       );
       return u;
     }
-    Tuple!(string, string) tablarize(O)(
+    @safe Tuple!(string, string) tablarize(O)(
       string            _txt,
       const        O    obj,
-    ) @safe {
+    ) {
       string[] _table_rows = (_txt).split(rgx.table_delimiter_row);
       string[] _table_cols;
       string _table;
@@ -1112,11 +1112,11 @@ template outputXHTMLs() {
       );
       return t;
     }
-    string table(O,M)(
+    @safe 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");
@@ -1146,11 +1146,11 @@ template outputXHTMLs() {
       );
       return o;
     }
-    string code(O,M)(
+    @safe 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");
diff --git a/src/doc_reform/io_out/xmls_css.d b/src/doc_reform/io_out/xmls_css.d
index 0974637..88af237 100644
--- a/src/doc_reform/io_out/xmls_css.d
+++ b/src/doc_reform/io_out/xmls_css.d
@@ -4,7 +4,7 @@
 module doc_reform.io_out.xmls_css;
 template spineCss() {
   import std.format;
-  auto spineCss(M)(M doc_matters) @safe {
+  @safe auto spineCss(M)(M doc_matters) {
     string _css_indent = format(q"┃
   /* indent */
   p.norm { }
@@ -4162,7 +4162,7 @@ template spineCss() {
     _css_indent,
     _color_ocn_dark,
 );
-    auto css_() @safe {
+    @safe auto css_() {
       struct _CSS {
         string html_seg    = "/* spine css html seg stylesheet */\n";
         string html_scroll = "/* spine css html scroll stylesheet */\n";