fontspec-opentype.dtx

% \section{OpenType definitions code}
%
% \iffalse
%    \begin{macrocode}
%<*fontspec&(xetexx|luatex)>
%    \end{macrocode}
% \fi
%
%
%
% \begin{macro}{\@@_define_opentype_feature_group:n}
%    \begin{macrocode}
\cs_new:Nn \@@_define_opentype_feature_group:n
  {
    \keys_define:nn {fontspec-opentype} { #1 .multichoice: }
  }
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\@@_define_opentype_feature:nnnnn}
% \darg{Feature key}
% \darg{Feature option val}
% \darg{Check feature --- leave empty for no check}
% \darg{Exact tag string to activate --- leave empty for disable only}
% \darg{Tags to remove (clist)}
%    \begin{macrocode}
\cs_new:Nn \@@_feat_prop_add:nn
  {
    \tl_if_empty:nF {#1}
     {
      \prop_if_in:NnF \g_@@_OT_features_prop {#1}
        {
          \prop_gput:Nnn \g_@@_OT_features_prop {#1} {#2}
        }
     }
  }
\cs_new:Nn \@@_define_opentype_feature:nnnnn
  {
    \@@_feat_prop_add:nn {#3} {#1\,=\,#2}
      \tl_if_empty:nTF {#4}
        {
          \keys_define:nn {fontspec-opentype}
            {
              #1/#2 .code:n =
                { \@@_remove_clashing_featstr:n {#5} }
            }
        }
        {
          \keys_define:nn {fontspec-opentype}
            {
              #1/#2 .code:n =
                {
%<debug>          \typeout{::::::::fontspec-opentype~#1/#2~=~#3/#4/#5}
                  \@@_make_OT_feature:nnn {#3} {#4} {#5}
                }
            }
        }
  }
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\@@_define_opentype_onoffreset:nnnnn}
% \darg{Feature key}
% \darg{Feature option val}
% \darg{Check feature}
% \darg{Tag prefix to activate: \texttt{+\#4} = on, \texttt{-\#4} = off.}
% \darg{Tags to remove in the on case (clist)}
%    \begin{macrocode}
\cs_new:Nn \@@_feat_off:n {#1Off}
\cs_new:Nn \@@_feat_reset:n {#1Reset}
%    \end{macrocode}
%
%    \begin{macrocode}
\cs_new:Nn \@@_define_opentype_onoffreset:nnnnn
 {
  \exp_args:Nnx \@@_define_opentype_feature:nnnnn {#1} {#2} {#3} {+#4} {#5}
  \exp_args:Nnx \@@_define_opentype_feature:nnnnn {#1} { \@@_feat_off:n   {#2} } {#3} {-#4} {}
  \exp_args:Nnx \@@_define_opentype_feature:nnnnn {#1} { \@@_feat_reset:n {#2} } {} {} {+#4,-#4}
 }
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\@@_define_opentype_onreset:nnnnn}
% \darg{Feature key}
% \darg{Feature option val}
% \darg{Check feature}
% \darg{Exact tag string to activate}
% \darg{Tags to remove (clist)}
%    \begin{macrocode}
\cs_new:Nn \@@_define_opentype_onreset:nnnnn
 {
  \exp_args:Nnx \@@_define_opentype_feature:nnnnn {#1} {#2} {#3} {#4} {#5}
  \exp_args:Nnx \@@_define_opentype_feature:nnnnn {#1} { \@@_feat_reset:n {#2} } {} {} {#4}
 }
%    \end{macrocode}
% \end{macro}
%
% \subsection{Adding features when loading fonts}
%
% When remove clashing features,
% \begin{enumerate}
% \item remove the feature being added (to avoid duplicates);
% \item remove the inverse of the feature (to avoid cancellation);
% \item finally remove all clashing features.
% \end{enumerate}
%    \begin{macrocode}
\cs_new:Nn \@@_make_OT_feature:nnn
  {
%<debug>  \typeout{:: @@_make_OT_feature:nnn \exp_not:n { {#1}{#2}{#3} } }

    \bool_set_true:N \l_@@_proceed_bool
    \bool_set_true:N  \l_@@_check_feat_bool

    \tl_if_empty:nT {#1} { \bool_set_false:N \l_@@_check_feat_bool }
    \bool_if:NT \l_@@_check_feat_bool
      {
        \@@_check_ot_feat:nF {#1}
          {
            \@@_warning:nx {icu-feature-not-exist-in-font} {#1}
            \bool_set_false:N \l_@@_proceed_bool
          }
      }

    \bool_if:NT \l_@@_proceed_bool
      {
        \exp_args:Nx \@@_remove_clashing_featstr:n
          { #2 , \@@_swap_plus_minus:n {#2} , #3 }

        \@@_update_featstr:n {#2}
      }
  }
\cs_generate_variant:Nn \@@_make_OT_feature:nnn {xxx}
%    \end{macrocode}
%
%    \begin{macrocode}
\cs_new:Nn \@@_swap_plus_minus:n { \@@_swap_plus_minus_aux:Nq #1 \q_nil }
\cs_new:Npn \@@_swap_plus_minus_aux:Nq #1#2 \q_nil
  { \str_case:nn {#1} { {+} {-#2} {-} {+#2} } }
%    \end{macrocode}
% \end{macro}
%
%
% \begin{macro}{\@@_check_script:nTF}
% This macro takes an OpenType script tag and checks if it exists in the current
% font. The output boolean is \cmd\@tempswatrue. \cmd\l_@@_script_int\ is used to store
% the number corresponding to the script tag string.
%    \begin{macrocode}
\prg_new_conditional:Nnn \@@_check_script:n {TF}
  {
    \bool_if:NTF \l_@@_never_check_bool
      { \prg_return_true: }
%<*xetexx>
 {
  \@@_iv_str_to_num:Nn \l_@@_strnum_int {#1}
  \int_set:Nn \l_tmpb_int { \XeTeXOTcountscripts \l_fontspec_font }
  \int_zero:N \l_tmpa_int
  \bool_set_false:N \l__fontspec_check_bool
  \bool_until_do:nn { \int_compare_p:nNn \l_tmpa_int = \l_tmpb_int }
   {
    \ifnum \XeTeXOTscripttag\l_fontspec_font \l_tmpa_int = \l_@@_strnum_int
      \bool_set_true:N \l__fontspec_check_bool
      \int_set:Nn \l_tmpa_int {\l_tmpb_int}
    \else
      \int_incr:N \l_tmpa_int
    \fi
   }
  \bool_if:NTF \l__fontspec_check_bool \prg_return_true: \prg_return_false:
 }
%</xetexx>
%<*luatex>
 {
  \directlua{fontspec.check_ot_script("l_fontspec_font", "#1")}
  \bool_if:NTF \l__fontspec_check_bool \prg_return_true: \prg_return_false:
 }
%</luatex>
 }
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\@@_check_lang:nTF}
% This macro takes an OpenType language tag and checks if it exists in the current
% font/script. The output boolean is \cmd\@tempswatrue. \cmd\l_@@_language_int\ is used to store
% the number corresponding to the language tag string.
% The script used is whatever's held in \cmd\l_@@_script_int. By default, that's the
% number corresponding to `|latn|'.
%    \begin{macrocode}
\prg_new_conditional:Nnn \@@_check_lang:n {TF}
  {
    \bool_if:NTF \l_@@_never_check_bool
      { \prg_return_true: }
%<*xetexx>
 {
  \@@_iv_str_to_num:Nn \l_@@_strnum_int {#1}
  \int_set:Nn \l_tmpb_int
   { \XeTeXOTcountlanguages \l_fontspec_font \l_@@_script_int }
  \int_zero:N \l_tmpa_int
  \bool_set_false:N \l__fontspec_check_bool
  \bool_until_do:nn { \int_compare_p:nNn \l_tmpa_int = \l_tmpb_int }
   {
    \ifnum\XeTeXOTlanguagetag\l_fontspec_font\l_@@_script_int \l_tmpa_int =\l_@@_strnum_int
      \bool_set_true:N \l__fontspec_check_bool
      \int_set:Nn \l_tmpa_int {\l_tmpb_int}
    \else
      \int_incr:N \l_tmpa_int
    \fi
   }
  \bool_if:NTF \l__fontspec_check_bool \prg_return_true: \prg_return_false:
 }
%</xetexx>
%<*luatex>
 {
  \directlua
   {
    fontspec.check_ot_lang( "l_fontspec_font", "#1", "\l_fontspec_script_tl" )
   }
  \bool_if:NTF \l__fontspec_check_bool \prg_return_true: \prg_return_false:
 }
%</luatex>
  }
%    \end{macrocode}
% \end{macro}
%
% \begin{macro}{\@@_check_ot_feat:nTF}
% This macro takes an OpenType feature tag and checks if it exists in the current
% font/script/language.
% \cmd\l_@@_strnum_int\ is used to store the number corresponding to the feature tag string.
% The script used is whatever's held in \cmd\l_@@_script_int. By default, that's the
% number corresponding to `|latn|'. The language used is \cmd\l_@@_language_int,
% by default |0|, the `default language'.
%    \begin{macrocode}
\prg_new_conditional:Nnn \@@_check_ot_feat:n {TF,F}
  {
    \bool_if:NTF \l_@@_never_check_bool
      { \prg_return_true: }
%<*xetexx>
 {
%<debug>\typeout{::~ fontspec_check_ot_feat:n~ {#1}}
  \int_set:Nn \l_tmpb_int
   {
    \XeTeXOTcountfeatures \l_fontspec_font
                          \l_@@_script_int
                          \l_@@_language_int
   }
  \@@_iv_str_to_num:Nn \l_@@_strnum_int {#1}
  \int_zero:N \l_tmpa_int
  \bool_set_false:N \l_@@_check_bool
  \bool_until_do:nn { \int_compare_p:nNn \l_tmpa_int = \l_tmpb_int }
   {
    \ifnum\XeTeXOTfeaturetag\l_fontspec_font\l_@@_script_int\l_@@_language_int
         \l_tmpa_int =\l_@@_strnum_int
      \bool_set_true:N \l_@@_check_bool
      \int_set:Nn \l_tmpa_int {\l_tmpb_int}
    \else
      \int_incr:N \l_tmpa_int
    \fi
   }
  \bool_if:NTF \l_@@_check_bool \prg_return_true: \prg_return_false:
 }
%</xetexx>
%<*luatex>
 {
%<debug>\typeout{::~ fontspec_check_ot_feat:n~ {#1}}
  \directlua
   {
    fontspec.check_ot_feat(
                           "l_fontspec_font", "#1",
                           "\l_fontspec_lang_tl", "\l_fontspec_script_tl"
                          )
   }
  \bool_if:NTF \l_@@_check_bool \prg_return_true: \prg_return_false:
 }
%</luatex>
  }
%    \end{macrocode}
% \end{macro}
%
% \subsection{OpenType feature information}
%
%    \begin{macrocode}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {aalt}{Access~All~Alternates}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {abvf}{Above-base~Forms}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {abvm}{Above-base~Mark~Positioning}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {abvs}{Above-base~Substitutions}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {afrc}{Alternative~Fractions}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {akhn}{Akhands}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {blwf}{Below-base~Forms}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {blwm}{Below-base~Mark~Positioning}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {blws}{Below-base~Substitutions}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {calt}{Contextual~Alternates}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {case}{Case-Sensitive~Forms}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {ccmp}{Glyph~Composition~/~Decomposition}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {cfar}{Conjunct~Form~After~Ro}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {cjct}{Conjunct~Forms}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {clig}{Contextual~Ligatures}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {cpct}{Centered~CJK~Punctuation}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {cpsp}{Capital~Spacing}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {cswh}{Contextual~Swash}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {curs}{Cursive~Positioning}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {cvNN}{Character~Variant~$N$}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {c2pc}{Petite~Capitals~From~Capitals}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {c2sc}{Small~Capitals~From~Capitals}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {dist}{Distances}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {dlig}{Discretionary~Ligatures}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {dnom}{Denominators}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {dtls}{Dotless~Forms}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {expt}{Expert~Forms}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {falt}{Final~Glyph~on~Line~Alternates}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {fin2}{Terminal~Forms~\#2}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {fin3}{Terminal~Forms~\#3}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {fina}{Terminal~Forms}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {flac}{Flattened~accent~forms}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {frac}{Fractions}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {fwid}{Full~Widths}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {half}{Half~Forms}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {haln}{Halant~Forms}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {halt}{Alternate~Half~Widths}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {hist}{Historical~Forms}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {hkna}{Horizontal~Kana~Alternates}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {hlig}{Historical~Ligatures}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {hngl}{Hangul}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {hojo}{Hojo~Kanji~Forms}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {hwid}{Half~Widths}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {init}{Initial~Forms}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {isol}{Isolated~Forms}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {ital}{Italics}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {jalt}{Justification~Alternates}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {jp78}{JIS78~Forms}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {jp83}{JIS83~Forms}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {jp90}{JIS90~Forms}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {jp04}{JIS2004~Forms}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {kern}{Kerning}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {lfbd}{Left~Bounds}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {liga}{Standard~Ligatures}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {ljmo}{Leading~Jamo~Forms}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {lnum}{Lining~Figures}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {locl}{Localized~Forms}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {ltra}{Left-to-right~alternates}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {ltrm}{Left-to-right~mirrored~forms}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {mark}{Mark~Positioning}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {med2}{Medial~Forms~\#2}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {medi}{Medial~Forms}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {mgrk}{Mathematical~Greek}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {mkmk}{Mark~to~Mark~Positioning}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {mset}{Mark~Positioning~via~Substitution}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {nalt}{Alternate~Annotation~Forms}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {nlck}{NLC~Kanji~Forms}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {nukt}{Nukta~Forms}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {numr}{Numerators}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {onum}{Oldstyle~Figures}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {opbd}{Optical~Bounds}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {ordn}{Ordinals}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {ornm}{Ornaments}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {palt}{Proportional~Alternate~Widths}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {pcap}{Petite~Capitals}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {pkna}{Proportional~Kana}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {pnum}{Proportional~Figures}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {pref}{Pre-Base~Forms}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {pres}{Pre-base~Substitutions}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {pstf}{Post-base~Forms}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {psts}{Post-base~Substitutions}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {pwid}{Proportional~Widths}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {qwid}{Quarter~Widths}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {rand}{Randomize}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {rclt}{Required~Contextual~Alternates}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {rkrf}{Rakar~Forms}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {rlig}{Required~Ligatures}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {rphf}{Reph~Forms}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {rtbd}{Right~Bounds}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {rtla}{Right-to-left~alternates}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {rtlm}{Right-to-left~mirrored~forms}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {ruby}{Ruby~Notation~Forms}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {rvrn}{Required~Variation~Alternates}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {salt}{Stylistic~Alternates}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {sinf}{Scientific~Inferiors}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {size}{Optical~size}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {smcp}{Small~Capitals}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {smpl}{Simplified~Forms}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {ssNN}{Stylistic~Set~$N$}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {ssty}{Math~script~style~alternates}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {stch}{Stretching~Glyph~Decomposition}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {subs}{Subscript}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {sups}{Superscript}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {swsh}{Swash}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {titl}{Titling}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {tjmo}{Trailing~Jamo~Forms}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {tnam}{Traditional~Name~Forms}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {tnum}{Tabular~Figures}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {trad}{Traditional~Forms}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {twid}{Third~Widths}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {unic}{Unicase}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {valt}{Alternate~Vertical~Metrics}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {vatu}{Vattu~Variants}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {vert}{Vertical~Writing}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {vhal}{Alternate~Vertical~Half~Metrics}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {vjmo}{Vowel~Jamo~Forms}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {vkna}{Vertical~Kana~Alternates}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {vkrn}{Vertical~Kerning}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {vpal}{Proportional~Alternate~Vertical~Metrics}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {vrt2}{Vertical~Alternates~and~Rotation}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {vrtr}{Vertical~Alternates~for~Rotation}
\prop_gput:Nnn \g_@@_all_opentype_feature_names_prop {zero}{Slashed~Zero}
%    \end{macrocode}
%
% \iffalse
%    \begin{macrocode}
%</fontspec&(xetexx|luatex)>
%    \end{macrocode}
% \fi