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Diffstat (limited to 'Master/texmf-dist/source/latex/unicode-math/unicode-math-main.dtx')
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diff --git a/Master/texmf-dist/source/latex/unicode-math/unicode-math-main.dtx b/Master/texmf-dist/source/latex/unicode-math/unicode-math-main.dtx new file mode 100644 index 00000000000..88c9524b18e --- /dev/null +++ b/Master/texmf-dist/source/latex/unicode-math/unicode-math-main.dtx @@ -0,0 +1,590 @@ + +% \section{\DTXCURR --- The main \cs{setmathfont} macro} +% +% \begin{macrocode} +%<*package&(XE|LU)> +% \end{macrocode} +% +% Using a |range| including large character sets such as \cmd\mathrel, +% \cmd\mathalpha, \etc, is \emph{very slow}! +% I hope to improve the performance somehow. +% +% \begin{macro}{\setmathfont} +% \doarg{font features (first optional argument retained for backwards compatibility)} +% \darg{font name} +% \doarg{font features} +% \begin{macrocode} +\DeclareDocumentCommand \setmathfont { O{} m O{} } + { + \@@_setmathfont:nn {#1,#3} {#2} + } +% \end{macrocode} +% +% \begin{macrocode} +\cs_set:Nn \@@_setmathfont:nn + { + \tl_set:Nn \l_@@_fontname_tl {#2} + \@@_init: +% \end{macrocode} +% Grab the current size information: +% (is this robust enough? Maybe it should be preceded by \cmd\normalsize). +% The macro \cmd\S@\meta{size} +% contains the definitions of the sizes used for maths letters, subscripts and subsubscripts in +% \cmd\tf@size, \cmd\sf@size, and \cmd\ssf@size, respectively. +% \begin{macrocode} + \cs_if_exist:cF { S@ \f@size } { \calculate@math@sizes } + \csname S@\f@size\endcsname +% \end{macrocode} +% Parse options and tell people what's going on: +% \begin{macrocode} + \keys_set_known:nnN {unicode-math} {#1} \l_@@_unknown_keys_clist + \bool_if:NT \l_@@_init_bool { \@@_log:n {default-math-font} } +% \end{macrocode} +% Use \pkg{fontspec} to select a font to use. +% After loading the font, we detect what sizes it recommends for scriptsize and scriptscriptsize, so after setting those values appropriately, we reload the font to take these into account. +% \begin{macrocode} +%<debug> \csname TIC\endcsname + \@@_fontspec_select_font: +%<debug> \csname TOC\endcsname + \bool_if:nT { \l_@@_ot_math_bool && !\g_@@_mainfont_already_set_bool } + { + \@@_declare_math_sizes: + \@@_fontspec_select_font: + } +% \end{macrocode} +% Now define |\@@_symfont_tl| as the \LaTeX\ math font to access everything: +% \begin{macrocode} + \cs_if_exist:cF { sym \@@_symfont_tl } + { + \DeclareSymbolFont{\@@_symfont_tl} + {\encodingdefault}{\l_@@_family_tl}{\mddefault}{\updefault} + } + \SetSymbolFont{\@@_symfont_tl}{\l_@@_mversion_tl} + {\encodingdefault}{\l_@@_family_tl}{\mddefault}{\updefault} +% \end{macrocode} +% Set the bold math version. +% \begin{macrocode} + \str_if_eq_x:nnT {\l_@@_mversion_tl} {normal} + { + \SetSymbolFont{\@@_symfont_tl}{bold} + {\encodingdefault}{\l_@@_family_tl}{\bfdefault}{\updefault} + } +% \end{macrocode} +% Declare the math sizes (i.e., scaling of superscripts) for the specific +% values for this font, +% and set defaults for math fams two and three for legacy compatibility: +% \begin{macrocode} + \bool_if:nT { \l_@@_ot_math_bool && !\g_@@_mainfont_already_set_bool } + { + \bool_set_true:N \g_@@_mainfont_already_set_bool + \@@_setup_legacy_fam_two: + \@@_setup_legacy_fam_three: + } +% \end{macrocode} +% And now we input every single maths char. +% \begin{macrocode} +%<debug> \csname TIC\endcsname + \@@_input_math_symbol_table: +%<debug> \csname TOC\endcsname +% \end{macrocode} +% Finally, +% \begin{itemize} +% \item Remap symbols that don't take their natural mathcode +% \item Activate any symbols that need to be math-active +% \item Enable wide/narrow accents +% \item Assign delimiter codes for symbols that need to grow +% \item Setup the maths alphabets (\cs{mathbf} etc.). +% This is an extensive part of the code; see Section~\ref{sec:mathmap}. +% \item Setup negations, which are handled on an ad hoc basis; see Section~\ref{sec:negations}. +% \end{itemize} +% \begin{macrocode} + \@@_remap_symbols: + \@@_setup_mathactives: + \@@_setup_delcodes: +%<debug> \csname TIC\endcsname + \@@_setup_alphabets: +%<debug> \csname TOC\endcsname + \@@_setup_negations: + } +% \end{macrocode} +% \end{macro} +% +% \paragraph{Fall-back font} +% +% Want to load Latin Modern Math if nothing else. +% This needs to happen early so that all of the font-loading machinery executes before +% the other `AtBeginDocument' code. +% \begin{macrocode} +\AtBeginDocument { \@@_load_lm_if_necessary: } +\cs_new:Nn \@@_load_lm_if_necessary: + { + \cs_if_exist:NF \l_@@_fontname_tl + { + % TODO: update this when lmmath-bold.otf is released + \setmathfont{latinmodern-math.otf}[BoldFont={latinmodern-math.otf}] + \bool_set_false:N \g_@@_mainfont_already_set_bool + } + } +% \end{macrocode} +% Note that here we reset the `font already loaded' boolean so that a new font being set +% will do the right thing in terms of setting up defaults. +% +% TODO: need a better way to do this for the general case. (Maybe a `reset' command option?) +% +% \begin{macro}{\@@_init:} +% \begin{macrocode} +\cs_new:Nn \@@_init: + { +% \end{macrocode} +% \begin{itemize} +% \item Initially assume we're using a proper OpenType font with unicode maths. +% \begin{macrocode} + \bool_set_true:N \l_@@_ot_math_bool +% \end{macrocode} +% \item Erase any conception \LaTeX\ has of previously defined math symbol fonts; +% this allows \cmd\DeclareSymbolFont\ at any point in the document. +% \begin{macrocode} + \cs_set_eq:NN \glb@currsize \scan_stop: +% \end{macrocode} +% \item To start with, assume we're defining the font for every math symbol character. +% \begin{macrocode} + \bool_set_true:N \l_@@_init_bool + \seq_clear:N \l_@@_char_range_seq + \clist_clear:N \l_@@_char_nrange_clist + \seq_clear:N \l_@@_mathalph_seq + \seq_clear:N \l_@@_missing_alph_seq +% \end{macrocode} +% \item By default use the `normal' math version. +% \begin{macrocode} + \tl_set:Nn \l_@@_mversion_tl {normal} +% \end{macrocode} +% \item Other range initialisations. +% \begin{macrocode} + \tl_set:Nn \@@_symfont_tl {operators} + \cs_set_eq:NN \_@@_sym:nnn \@@_process_symbol_noparse:nnn + \cs_set_eq:NN \@@_set_mathalphabet_char:nnn \@@_mathmap_noparse:nnn + \cs_set_eq:NN \@@_remap_symbol:nnn \@@_remap_symbol_noparse:nnn + \cs_set_eq:NN \@@_maybe_init_alphabet:n \@@_init_alphabet:n + \cs_set_eq:NN \@@_map_char_single:nn \@@_map_char_noparse:nn + \cs_set_eq:NN \@@_assign_delcode:nn \@@_assign_delcode_noparse:nn + \cs_set_eq:NN \@@_make_mathactive:nNN \@@_make_mathactive_noparse:nNN +% \end{macrocode} +% \item Define default font features for the script and scriptscript font. +% \begin{macrocode} + \tl_set:Nn \l_@@_script_features_tl {Style=MathScript} + \tl_set:Nn \l_@@_sscript_features_tl {Style=MathScriptScript} + \tl_set_eq:NN \l_@@_script_font_tl \l_@@_fontname_tl + \tl_set_eq:NN \l_@@_sscript_font_tl \l_@@_fontname_tl +% \end{macrocode} +% \end{itemize} +% \begin{macrocode} + } +% \end{macrocode} +% \end{macro} +% +% \begin{macro}{\@@_declare_math_sizes:} +% Set the math sizes according to the recommended font parameters. +% TODO: this shouldn't need to be per-engine; check out why the wrappers aren't used. +% \begin{macrocode} +\cs_new:Nn \@@_declare_math_sizes: + { +%<*LU> + \fp_compare:nF { \@@_script_style_size:n {ScriptPercentScaleDown} == 0 } + { + \DeclareMathSizes { \f@size } { \f@size } + { \@@_script_style_size:n {ScriptPercentScaleDown} } + { \@@_script_style_size:n {ScriptScriptPercentScaleDown} } + } +%</LU> +%<*XE> + \dim_compare:nF { \fontdimen 10 \l_@@_font == 0pt } + { + \DeclareMathSizes { \f@size } { \f@size } + { \@@_fontdimen_to_scale:nn {10} {\l_@@_font} } + { \@@_fontdimen_to_scale:nn {11} {\l_@@_font} } + } +%</XE> + } +% \end{macrocode} +% \end{macro} +% +% \begin{macro}{\@@_script_style_size:n} +% Determine script- and scriptscriptstyle sizes using luaotfload: +% \begin{macrocode} +%<*LU> +\cs_new:Nn \@@_script_style_size:n + { + \fp_eval:n {\directlua{tex.sprint(luaotfload.aux.get_math_dimension("l_@@_font","#1"))} * \f@size / 100 } + } +%</LU> +% \end{macrocode} +% \end{macro} +% +% \begin{macro}{\@@_setup_legacy_fam_two:} +% \TeX\ won't load the same font twice at the same scale, so we need to magnify this one by an imperceptable amount. +% \begin{macrocode} +\cs_new:Nn \@@_setup_legacy_fam_two: + { + \fontspec_set_family:Nxn \l_@@_family_tl + { + \l_@@_font_keyval_tl, + Scale=1.00001, + FontAdjustment = + { + \fontdimen8\font= \@@_get_fontparam:nn {43} {FractionNumeratorDisplayStyleShiftUp}\relax + \fontdimen9\font= \@@_get_fontparam:nn {42} {FractionNumeratorShiftUp}\relax + \fontdimen10\font=\@@_get_fontparam:nn {32} {StackTopShiftUp}\relax + \fontdimen11\font=\@@_get_fontparam:nn {45} {FractionDenominatorDisplayStyleShiftDown}\relax + \fontdimen12\font=\@@_get_fontparam:nn {44} {FractionDenominatorShiftDown}\relax + \fontdimen13\font=\@@_get_fontparam:nn {21} {SuperscriptShiftUp}\relax + \fontdimen14\font=\@@_get_fontparam:nn {21} {SuperscriptShiftUp}\relax + \fontdimen15\font=\@@_get_fontparam:nn {22} {SuperscriptShiftUpCramped}\relax + \fontdimen16\font=\@@_get_fontparam:nn {18} {SubscriptShiftDown}\relax + \fontdimen17\font=\@@_get_fontparam:nn {18} {SubscriptShiftDownWithSuperscript}\relax + \fontdimen18\font=\@@_get_fontparam:nn {24} {SuperscriptBaselineDropMax}\relax + \fontdimen19\font=\@@_get_fontparam:nn {20} {SubscriptBaselineDropMin}\relax + \fontdimen20\font=0pt\relax % delim1 = FractionDelimiterDisplaySize + \fontdimen21\font=0pt\relax % delim2 = FractionDelimiterSize + \fontdimen22\font=\@@_get_fontparam:nn {15} {AxisHeight}\relax + } + } {\l_@@_fontname_tl} + + \SetSymbolFont{symbols}{\l_@@_mversion_tl} + {\encodingdefault}{\l_@@_family_tl}{\mddefault}{\updefault} + + \str_if_eq_x:nnT {\l_@@_mversion_tl} {normal} + { + \SetSymbolFont{symbols}{bold} + {\encodingdefault}{\l_@@_family_tl}{\bfdefault}{\updefault} + } + } +% \end{macrocode} +% \end{macro} +% +% \begin{macro}{\@@_setup_legacy_fam_three:} +% Similarly, this font is shrunk by an imperceptable amount for \TeX\ to load it again. +% \begin{macrocode} +\cs_new:Nn \@@_setup_legacy_fam_three: + { + \fontspec_set_family:Nxn \l_@@_family_tl + { + \l_@@_font_keyval_tl, + Scale=0.99999, + FontAdjustment={ + \fontdimen8\font= \@@_get_fontparam:nn {48} {FractionRuleThickness}\relax + \fontdimen9\font= \@@_get_fontparam:nn {28} {UpperLimitGapMin}\relax + \fontdimen10\font=\@@_get_fontparam:nn {30} {LowerLimitGapMin}\relax + \fontdimen11\font=\@@_get_fontparam:nn {29} {UpperLimitBaselineRiseMin}\relax + \fontdimen12\font=\@@_get_fontparam:nn {31} {LowerLimitBaselineDropMin}\relax + \fontdimen13\font=0pt\relax + } + } {\l_@@_fontname_tl} + + \SetSymbolFont{largesymbols}{\l_@@_mversion_tl} + {\encodingdefault}{\l_@@_family_tl}{\mddefault}{\updefault} + + \str_if_eq_x:nnT {\l_@@_mversion_tl} {normal} + { + \SetSymbolFont{largesymbols}{bold} + {\encodingdefault}{\l_@@_family_tl}{\bfdefault}{\updefault} + } + } +% \end{macrocode} +% \end{macro} +% +% \begin{macrocode} +\cs_new:Nn \@@_get_fontparam:nn + { +%<XE> \the\fontdimen#1\l_@@_font\relax +%<LU> \directlua{fontspec.mathfontdimen("l_@@_font","#2")} + } +% \end{macrocode} +% +% \begin{macro}{\@@_fontspec_select_font:} +% Select the font with \cs{fontspec} and define \cs{l_@@_font} from it. +% \begin{macrocode} +\cs_new:Nn \@@_fontspec_select_font: + { + \tl_set:Nx \l_@@_font_keyval_tl { +%<LU> Renderer = Basic, + BoldItalicFont = {}, ItalicFont = {}, + Script = Math, + SizeFeatures = + { + { + Size = \tf@size- + } , + { + Size = \sf@size-\tf@size , + Font = \l_@@_script_font_tl , + \l_@@_script_features_tl + } , + { + Size = -\sf@size , + Font = \l_@@_sscript_font_tl , + \l_@@_sscript_features_tl + } + } , + \l_@@_unknown_keys_clist + } + \fontspec_set_fontface:NNxn \l_@@_font \l_@@_family_tl + {\l_@@_font_keyval_tl} {\l_@@_fontname_tl} +% \end{macrocode} +% Check whether we're using a real maths font: +% \begin{macrocode} + \group_begin: + \fontfamily{\l_@@_family_tl}\selectfont + \fontspec_if_script:nF {math} {\bool_gset_false:N \l_@@_ot_math_bool} + \group_end: + } +% \end{macrocode} +% \end{macro} +% +% \subsection{Functions for setting up symbols with mathcodes} +% \seclabel{mathsymbol} +% +% \begin{macro}{\@@_process_symbol_noparse:nnn} +% \begin{macro}{\@@_process_symbol_parse:nnn} +% If the \feat{range} font feature has been used, then only +% a subset of the Unicode glyphs are to be defined. +% See \secref{rangeproc} for the code that enables this. +% \begin{macrocode} +\cs_set:Nn \@@_process_symbol_noparse:nnn + { + \@@_set_mathsymbol:nNNn {\@@_symfont_tl} #2 #3 {#1} + } +% \end{macrocode} +% \begin{macrocode} +\cs_set:Nn \@@_process_symbol_parse:nnn + { + \@@_if_char_spec:nNNT {#1} {#2} {#3} + { + \@@_process_symbol_noparse:nnn {#1} {#2} {#3} + } + } +% \end{macrocode} +% \end{macro} +% \end{macro} +% +% \begin{macro}{\@@_remap_symbols:} +% \begin{macro}{\@@_remap_symbol_noparse:nnn} +% \begin{macro}{\@@_remap_symbol_parse:nnn} +% This function is used to define the mathcodes for those chars which should +% be mapped to a different glyph than themselves. +% \begin{macrocode} +\cs_new:Npn \@@_remap_symbols: + { + \@@_remap_symbol:nnn{`\-}{\mathbin}{"02212}% hyphen to minus + \@@_remap_symbol:nnn{`\*}{\mathbin}{"02217}% text asterisk to "centred asterisk" + \bool_if:NF \g_@@_literal_colon_bool + { + \@@_remap_symbol:nnn{`\:}{\mathrel}{"02236}% colon to ratio (i.e., punct to rel) + } + } +% \end{macrocode} +% \end{macro} +% Where |\@@_remap_symbol:nnn| is defined to be one of these two, depending +% on the range setup: +% \begin{macrocode} +\cs_new:Nn \@@_remap_symbol_parse:nnn + { + \@@_if_char_spec:nNNT {#3} {\@nil} {#2} + { \@@_remap_symbol_noparse:nnn {#1} {#2} {#3} } + } +\cs_new:Nn \@@_remap_symbol_noparse:nnn + { + \clist_map_inline:nn {#1} + { \@@_set_mathcode:nnnn {##1} {#2} {\@@_symfont_tl} {#3} } + } +% \end{macrocode} +% \end{macro} +% \end{macro} +% +% \subsection{Active math characters} +% +% There are more math active chars later in the subscript/superscript section. +% But they don't need to be able to be typeset directly. +% +% \begin{macro}{\@@_setup_mathactives:} +% \begin{macrocode} +\cs_new:Npn \@@_setup_mathactives: + { + \@@_make_mathactive:nNN {"2032} \@@_prime_single_mchar \mathord + \@@_make_mathactive:nNN {"2033} \@@_prime_double_mchar \mathord + \@@_make_mathactive:nNN {"2034} \@@_prime_triple_mchar \mathord + \@@_make_mathactive:nNN {"2057} \@@_prime_quad_mchar \mathord + \@@_make_mathactive:nNN {"2035} \@@_backprime_single_mchar \mathord + \@@_make_mathactive:nNN {"2036} \@@_backprime_double_mchar \mathord + \@@_make_mathactive:nNN {"2037} \@@_backprime_triple_mchar \mathord + \@@_make_mathactive:nNN {`\'} \mathstraightquote \mathord + \@@_make_mathactive:nNN {`\`} \mathbacktick \mathord + } +% \end{macrocode} +% \end{macro} +% +% \begin{macro}{\@@_make_mathactive:nNN} +% Makes |#1| a mathactive char, and gives cs |#2| the meaning of mathchar |#1| +% with class |#3|. +% You are responsible for giving active |#1| a particular meaning! +% \begin{macrocode} +\cs_new:Nn \@@_make_mathactive_parse:nNN + { + \@@_if_char_spec:nNNT {#1} #2 #3 + { \@@_make_mathactive_noparse:nNN {#1} #2 #3 } + } +% \end{macrocode} +% +% \begin{macrocode} +\cs_new:Nn \@@_make_mathactive_noparse:nNN + { + \@@_set_mathchar:NNnn #2 #3 {\@@_symfont_tl} {#1} + \@@_char_gmake_mathactive:n {#1} + } +% \end{macrocode} +% \end{macro} +% +% \subsection{Delimiter codes} +% +% \begin{macro}{\@@_assign_delcode:nn} +% \begin{macrocode} +\cs_new:Nn \@@_assign_delcode_noparse:nn + { + \@@_set_delcode:nnn \@@_symfont_tl {#1} {#2} + } +% \end{macrocode} +% +% \begin{macrocode} +\cs_new:Nn \@@_assign_delcode_parse:nn + { + \@@_if_char_spec:nNNT {#2} {\@nil} {\@nil} + { + \@@_assign_delcode_noparse:nn {#1} {#2} + } + } +% \end{macrocode} +% \end{macro} +% +% \begin{macro}{\@@_assign_delcode:n} +% Shorthand. +% \begin{macrocode} +\cs_new:Nn \@@_assign_delcode:n { \@@_assign_delcode:nn {#1} {#1} } +% \end{macrocode} +% \end{macro} +% +% \begin{macro}{\@@_setup_delcodes:} +% Some symbols that aren't mathopen/mathclose still need to have delimiter codes assigned. +% The list of vertical arrows may be incomplete. +% On the other hand, many fonts won't support them all being stretchy. +% And some of them are probably not meant to stretch, either. But adding them here doesn't hurt. +% \begin{macrocode} +\cs_new:Npn \@@_setup_delcodes: + { + % ensure \left. and \right. work: + \@@_set_delcode:nnn \@@_symfont_tl {`\.} {\c_zero} + % this is forcefully done to fix a bug -- indicates a larger problem! + + \@@_assign_delcode:nn {`\/} {\g_@@_slash_delimiter_usv} + \@@_assign_delcode:nn {"2044} {\g_@@_slash_delimiter_usv} % fracslash + \@@_assign_delcode:nn {"2215} {\g_@@_slash_delimiter_usv} % divslash + \@@_assign_delcode:n {"005C} % backslash + \@@_assign_delcode:nn {`\<} {"27E8} % angle brackets with ascii notation + \@@_assign_delcode:nn {`\>} {"27E9} % angle brackets with ascii notation + \@@_assign_delcode:n {"2191} % up arrow + \@@_assign_delcode:n {"2193} % down arrow + \@@_assign_delcode:n {"2195} % updown arrow + \@@_assign_delcode:n {"219F} % up arrow twohead + \@@_assign_delcode:n {"21A1} % down arrow twohead + \@@_assign_delcode:n {"21A5} % up arrow from bar + \@@_assign_delcode:n {"21A7} % down arrow from bar + \@@_assign_delcode:n {"21A8} % updown arrow from bar + \@@_assign_delcode:n {"21BE} % up harpoon right + \@@_assign_delcode:n {"21BF} % up harpoon left + \@@_assign_delcode:n {"21C2} % down harpoon right + \@@_assign_delcode:n {"21C3} % down harpoon left + \@@_assign_delcode:n {"21C5} % arrows up down + \@@_assign_delcode:n {"21F5} % arrows down up + \@@_assign_delcode:n {"21C8} % arrows up up + \@@_assign_delcode:n {"21CA} % arrows down down + \@@_assign_delcode:n {"21D1} % double up arrow + \@@_assign_delcode:n {"21D3} % double down arrow + \@@_assign_delcode:n {"21D5} % double updown arrow + \@@_assign_delcode:n {"21DE} % up arrow double stroke + \@@_assign_delcode:n {"21DF} % down arrow double stroke + \@@_assign_delcode:n {"21E1} % up arrow dashed + \@@_assign_delcode:n {"21E3} % down arrow dashed + \@@_assign_delcode:n {"21E7} % up white arrow + \@@_assign_delcode:n {"21E9} % down white arrow + \@@_assign_delcode:n {"21EA} % up white arrow from bar + \@@_assign_delcode:n {"21F3} % updown white arrow + } +% \end{macrocode} +% \end{macro} +% +% \subsection{(Big) operators} +% +% The engine does what is necessary to deal with big operators for us +% automatically with \cmd\Umathchardef. +% However, the limits aren't set automatically; that is, we want to define, +% a la Plain \TeX\ \etc, |\def\int{\intop\nolimits}|, so there needs to be a +% transformation from \cmd\int\ to \cmd\intop\ during the expansion of +% \cmd\_@@_sym:nnn\ in the appropriate contexts. +% +% \begin{macro}{\l_@@_nolimits_tl} +% This macro is a sequence containing those maths operators that require a +% \cmd\nolimits\ suffix. +% This list is used when processing |unicode-math-table.tex| to define such +% commands automatically (see the macro \cs{@@_set_mathsymbol:nNNn}). +% I've chosen essentially just the operators that look like integrals; +% hopefully a better mathematician can help me out here. +% I've a feeling that it's more useful \emph{not} to include the multiple +% integrals such as $\iiiint$, but that might be a matter of preference. +% \begin{macrocode} +\tl_set:Nn \l_@@_nolimits_tl + { + \int\iint\iiint\iiiint\oint\oiint\oiiint + \intclockwise\varointclockwise\ointctrclockwise\sumint + \intbar\intBar\fint\cirfnint\awint\rppolint + \scpolint\npolint\pointint\sqint\intlarhk\intx + \intcap\intcup\upint\lowint + } +% \end{macrocode} +% \end{macro} +% +% \begin{macro}{\addnolimits} +% This macro appends material to the macro containing the list of operators +% that don't take limits. +% \begin{macrocode} +\DeclareDocumentCommand \addnolimits {m} + { + \tl_put_right:Nn \l_@@_nolimits_tl {#1} + } +% \end{macrocode} +% \end{macro} +% +% \begin{macro}{\removenolimits} +% Can this macro be given a better name? +% It removes an item from the nolimits list. +% \begin{macrocode} +\DeclareDocumentCommand \removenolimits {m} + { + \tl_remove_all:Nn \l_@@_nolimits_tl {#1} + } +% \end{macrocode} +% \end{macro} +% +% \subsection{Radicals} +% +% \begin{macro}{\l_@@_radicals_tl} +% The radicals are organised in \cs{@@_set_mathsymbol:nNNn}. +% We organise radicals in the same way as nolimits-operators. +% (\cs{cuberoot} and \cs{fourthroot}, don't seem to behave as proper radicals.) +% \begin{macrocode} +\tl_set:Nn \l_@@_radicals_tl {\sqrt \longdivision} +% \end{macrocode} +% \end{macro} +% +% \begin{macrocode} +%</package&(XE|LU)> +% \end{macrocode} +% +\endinput |