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%
% lltjp-unicode-math.sty
%
\NeedsTeXFormat{LaTeX2e}
\ProvidesPackage{lltjp-unicode-math}[2017/11/12 Patch to unicode-math for LuaTeX-ja]
\RequirePackage{unicode-math,luatexja}
\ExplSyntaxOn
\group_begin:
\bool_new:N \lltjp_um_patch_mathgroup_bool
\bool_set_true:N \lltjp_um_patch_mathgroup_bool
%% Recent unicode-math (2017-10-02, v0.8g) does not have \ProvidesPackage,
%% So we can't use the date option of \@ifpackageloaded.
\cs_gset:Nn \__um_define_math_chars: {
\group_begin:
\cs_set:Npn \__um_sym:nnn ##1##2##3
{
\tl_if_in:nnT
{ \mathord \mathalpha \mathbin \mathrel \mathpunct \mathop \mathfence }
{##3}
{
\exp_last_unbraced:NNx \cs_gset_eq:NN ##2 { \Ucharcat ##1 ~ 12 ~ }
\ltjsetmathletter{ ##1 }
}
}
\__um_input_math_symbol_table:
\group_end:
}
\bool_if:NT \lltjp_um_patch_mathgroup_bool {
\cs_gset:Npn \use@mathgroup #1 #2
{
%\typeout{UM <#1><#2>}
\mode_if_math:T % <- not sure if this is really necessary since we've just checked for mmode and raised an error if not!
{
\math@bgroup
\cs_if_eq:cNF {M@\f@encoding} #1 {#1}
\__um_switchto_literal:
\ltj@tempcnta=#2 \expandafter\ltj@@mathJapaneseFonts\string#1\relax%
\ifin@ \jfam #2 \relax \else \mathgroup #2 \relax \fi
\math@egroup
}
}
}
\group_end:
\ExplSyntaxOff
\endinput
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