\NeedsTeXFormat{LaTeX2e}[2022/06/01]
\def\fileversion{0.45}
\def\filedate{2024-12-14}
\ProvidesPackage{lete-sans-math}[\filedate\space\fileversion]

% Ensure luatex or xetex engine
\RequirePackage{iftex}[2019/10/24]
\RequireTUTeX
\RequirePackage{unicode-math}

\newopentypefeature{Style}{leqslant}{+ss04}
\newopentypefeature{Style}{smaller}{+ss05}
\newopentypefeature{Style}{subsetneq}{+ss06}
\newopentypefeature{Style}{parallelslant}{+ss07}
\newopentypefeature{Style}{upint}{+ss08}
\newopentypefeature{Style}{upneg}{+ss09}

\newtoks\LeteMtoks
\newcommand*{\Letestore@KV@Option}[2]{%
  \LeteMtoks=\expandafter{\the\LeteMtoks #1={#2},}}

% Package options:
\DeclareKeys
  {
   tight.if              = Lete@tight                                 ,
   loose.code            = \Lete@tightfalse                           ,
   fulloldstyle.code     = \Letestore@KV@Option{Numbers}{OldStyle}    ,
   math-style.code       = \Letestore@KV@Option{math-style}{#1}       ,
   bold-style.code       = \Letestore@KV@Option{bold-style}{#1}       ,
   nabla.code            = \Letestore@KV@Option{nabla}{#1}            ,
   partial.code          = \Letestore@KV@Option{partial}{#1}          ,
   CharacterVariant.code = \Letestore@KV@Option{CharacterVariant}{#1} ,
   StylisticSet.code     = \Letestore@KV@Option{StylisticSet}{#1}     ,
   Style.code            = \Letestore@KV@Option{Style}{#1}            ,
   Scale.code            = \Letestore@KV@Option{Scale}{#1}
  }
%
\ProcessKeyOptions
%
% Math fonts: LeteSansMath.otf, LeteSansMath-Bold.otf.
% Following Joseph Wright in https://tex.stackexchange.com/questions/451
\Letestore@KV@Option{BoldFont}{LeteSansMath-Bold.otf}
\begingroup
  \edef\temp{%
    \endgroup
    \noexpand\setmathfont{LeteSansMath.otf}%
    [\unexpanded\expandafter{\the\LeteMtoks}]%
  }
  \temp
% For Maths operators in case Lato isn't the main text font.
\setmathfontface\mathrm{Lato-Regular.ttf}
\setmathfontface\mathit{Lato-Italic.ttf}
\setmathfontface\mathbf{Lato-Bold.ttf}
%
\ifLete@tight
  \thinmuskip=2mu
  \medmuskip=2.5mu plus 1mu minus 2.5mu
  \thickmuskip=3.5mu plus 2.5mu
\fi

\AtBeginDocument{%
  % LeteSansMath specific
  % \Umathchardef\<cmd> = <math type> <family> <slot>
  % <math type> : \mathord=0 \mathrel=3 ; <family>=0
  \Umathchardef\mbfimath =            0 0 "E041 \relax
  \Umathchardef\mbfjmath =            0 0 "E042 \relax
  \Umathchardef\mbfdotlessi =         0 0 "E043 \relax
  \Umathchardef\mbfdotlessj =         0 0 "E044 \relax
  \Umathchardef\mithbar =             0 0 "E048 \relax
  \Umathchardef\mupvarg =             0 0 "E04B \relax
  \Umathchardef\mbfvarg =             0 0 "E04C \relax
  \Umathchardef\mitvarg =             0 0 "E04D \relax
  \Umathchardef\mbfitvarg =           0 0 "E04E \relax
  \Umathchardef\varemptyset =         0 0 "E04F \relax
  \Umathchardef\BbbDelta =            0 0 "E050 \relax
  \Umathchardef\BbbTheta =            0 0 "E051 \relax
  \Umathchardef\BbbLambda =           0 0 "E052 \relax
  \Umathchardef\BbbXi =               0 0 "E053 \relax
  \Umathchardef\BbbSigma =            0 0 "E054 \relax
  \Umathchardef\BbbPhi =              0 0 "E055 \relax
  \Umathchardef\BbbPsi =              0 0 "E056 \relax
  \Umathchardef\BbbOmega =            0 0 "E057 \relax
  \Umathchardef\lesseqslantgtr =      3 0 "E060 \relax
  \Umathchardef\gtreqslantless =      3 0 "E061 \relax
  \Umathchardef\lesseqqslantgtr =     3 0 "E062 \relax
  \Umathchardef\gtreqqslantless =     3 0 "E063 \relax
  \Umathchardef\nleqqslant =          3 0 "E066 \relax
  \Umathchardef\ngeqqslant =          3 0 "E067 \relax
  \Umathchardef\parallelslant  =      3 0 "E080 \relax
  \Umathchardef\nparallelslant =      3 0 "E081 \relax
  \Umathchardef\shortparallelslant =  3 0 "E082 \relax
  \Umathchardef\nshortparallelslant = 3 0 "E083 \relax
  \Umathchardef\mapstochar =          3 0 "E08D \relax
  \Umathchardef\lhook =               3 0 "E08E \relax
  \Umathchardef\rhook =               3 0 "E08F \relax
  % amssymb
  \@ifpackageloaded{amssymb}%
    {\PackageWarning{lete-sans-math}{%
       LeteSansMath provides all AMS symbols.\MessageBreak
       Loading amssymb.sty is not advisable.\MessageBreak
       Reported}%
    }%
    {% AMS Symbols not referenced in unicode-math-table.tex
     % \Umathchardef\<cmd> = <math type> <family> <slot>
     % <math type> : \mathord=0 \mathrel=3 ; <family>=0
     \Umathchardef\circledR =       0 0 "24C7 \relax
     \Umathchardef\circledS =       0 0 "24C8 \relax
     \Umathchardef\diagup =         0 0 "27CB \relax
     \Umathchardef\diagdown =       0 0 "27CD \relax
     \Umathchardef\lvertneqq =      3 0 "E002 \relax
     \Umathchardef\gvertneqq =      3 0 "E003 \relax
     \Umathchardef\varsubsetneq =   3 0 "E006 \relax
     \Umathchardef\varsupsetneq =   3 0 "E007 \relax
     \Umathchardef\varsubsetneqq =  3 0 "E015 \relax
     \Umathchardef\varsupsetneqq =  3 0 "E016 \relax
     \Umathchardef\shortmid =       3 0 "E070 \relax
     \Umathchardef\shortparallel =  3 0 "E071 \relax
     \Umathchardef\nshortmid =      3 0 "E072 \relax
     \Umathchardef\nshortparallel = 3 0 "E073 \relax
     \Umathchardef\nleqslant =      3 0 "E076 \relax
     \Umathchardef\ngeqslant =      3 0 "E077 \relax
     \Umathchardef\nleqq =          3 0 "E078 \relax
     \Umathchardef\ngeqq =          3 0 "E079 \relax
     \Umathchardef\npreceq =        3 0 "E07C \relax
     \Umathchardef\nsucceq =        3 0 "E07D \relax
     \Umathchardef\nsubseteqq =     3 0 "E07E \relax
     \Umathchardef\nsupseteqq =     3 0 "E07F \relax
     \let\centerdot\cdotp
     \let\restriction\upharpoonright
     \let\doteqdot\Doteq
     \let\doublecup\Cup
     \let\doublecap\Cap
     \let\llless\lll
     \let\gggtr\ggg
     \let\circlearrowleft\acwopencirclearrow
     \let\circlearrowright\cwopencirclearrow
     \let\lozenge\mdlgwhtlozenge
     \let\blacklozenge\mdlgblklozenge
     \let\square\mdlgwhtsquare
     \let\blacksquare\mdlgblksquare
     \let\dashleftarrow\leftdasharrow
     \let\dashrightarrow\rightdasharrow
     \let\ntriangleleft\nvartriangleleft
     \let\ntriangleright\nvartriangleright
     \let\varpropto\propto
     \let\thicksim\sim
     \let\thickapprox\approx
     \let\smallsmile\smile
     \let\smallfrown\frown
    }%
  % latexsym
  \@ifpackageloaded{latexsym}%
    {\PackageWarning{lete-sans-math}{%
       LeteSansMath provides all LaTeX symbols.\MessageBreak
       Loading latexsym.sty is not advisable.\MessageBreak
       Reported}%
    }%
    {\let\lhd\vartriangleleft
     \let\rhd\vartriangleright
     \let\unlhd\trianglelefteq
     \let\unrhd\trianglerighteq
     \let\leadsto\rightcurvedarrow
     \let\Box\lgwhtsquare
     \let\Diamond\mdlgwhtdiamond
    }%
}

\endinput