%++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++%
% This is file 'skeyval.sty', version 1.3, 2013/05/15.                     %
%                                                                          %
%                                  NOTE                                    %
%                                                                          %
% Beginning from version 1.0, 2012/09/01, the skeyval package has changed  %
% radically. Users of pre-version 1.0 of the package can load it now by    %
% calling:                                                                 %
%                                                                          %
%    \usepackage[compatibility]{skeyval}                                   %
%    \RequirePackage[compatibility]{skeyval}                               %
%                 or                                                       %
%    \usepackage{skeyval-bc}                                               %
%    \RequirePackage{skeyval-bc}                                           %
%                                                                          %
%                                LICENSE                                   %
%                                                                          %
% This package and accompanying files may be distributed and/or            %
% modified under the conditions of the LaTeX Project Public License,       %
% either version 1.3 of this license or any later version. The latest      %
% version of this license is in http://www.latex-project.org/lppl.txt      %
% and version 1.3 or later is part of all distributions of LaTeX           %
% version 2005/12/01 or later.                                             %
%                                                                          %
% The LPPL maintenance status of this software is 'author-maintained'.     %
%                                                                          %
% This software is provided 'as it is', without warranty of any kind,      %
% either expressed or implied, including, but not limited to, the          %
% implied warranties of merchantability and fitness for a particular       %
% purpose.                                                                 %
%                                                                          %
%                              DISTRIBUTION                                %
%                                                                          %
% The following files constitute the skeyval bundle and must be            %
% distributed as a whole:                                                  %
%                                                                          %
%  README, skeyval.sty, skeyval-core.tex, skeyval-for.tex,                 %
%  skeyval-view.sty, skeyval-ltxpatch.sty, skeyval-ltxcmds.tex,            %
%  skeyval-pstkey.sty, skeyval-pstkey.tex, skeyval-testclass.cls,          %
%  skeyval-testpkg.sty, skeyval-pokayoke1, skeyval-pokayoke2,              %
%  skeyval-view-pokayoke1.                                                 %
%                                                                          %
% Copyright (c) 2010-2013 Ahmed Musa (amusa22@gmail.com).                  %
%++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++%

\begingroup
\catcode035 06 % #
\catcode064 11 % @
\catcode123 01 % {
\catcode125 02 % }
\catcode044 12 % ,
\def\skv@prova{\endgroup
  \def\do##1,{%
    \ifx\do##1\else
      \catcode##1\string=\the\catcode##1\relax
      \expandafter\do
    \fi
  }%
  \edef\skv@restorecodes{\do35,64,123,125,61,59,13,\do,}%
}
\skv@prova

\edef\skv@restorecodes{%
  \unexpanded\expandafter{\skv@restorecodes}%
  \endlinechar\the\endlinechar\relax
}
\endlinechar13 %
\catcode035 06 % #
\catcode064 11 % @
\catcode123 01 % {
\catcode125 02 % }
\catcode061 12 % =
\catcode044 12 % ,
\def\do#1=#2,{%
  \ifx\do#1\else
    \edef\skv@restorecodes{%
      \unexpanded\expandafter{\skv@restorecodes}%
      \catcode#1=\the\catcode#1\relax
    }%
    \catcode#1=#2\relax
    \expandafter\do
  \fi
}
\do 032=10,033=12,036=03,038=04,040=12,041=12,042=12,043=12,%
  059=12,045=12,047=12,058=12,063=12,091=12,093=12,126=13,\do=,%

\ProvidesPackage{skeyval}[2013/05/15 v1.3 Robust key-value parser (AM)]
\NeedsTeXFormat{LaTeX2e}[2011/06/27]

\input skeyval-core

\skvrobustdef*\skvafterendpackage{%
  \skvifcsdefTF{\@currname.\@currext-skv@endpkghook}{}{%
    \@namedef{\@currname.\@currext-skv@endpkghook}{}%
  }%
  \expandafter\g@addto@macro
  \csname\@currname.\@currext-skv@endpkghook\endcsname
}
\skvrobustdef*\skvafterpackage#1{%
  \skvafterbegindocument{%
    \skvifcsdefTF{ver@#1.\@pkgextension}{}{%
      \skv@warn{Package '#1' was never loaded}%
    }%
  }
  \skvifcsdefTF{ver@#1.\@pkgextension}{%
    \@firstofone
  }{%
    \skvappendtomacro{#1.\@pkgextension-skv@endpkghook}%
  }%
}
\xdef\@popfilename{%
  \unexpanded{%
    \csname\@currname.\@currext-skv@endpkghook\endcsname
    \expandafter\let
    \csname\@currname.\@currext-skv@endpkghook\endcsname\relax
  }%
  \unexpanded\expandafter{\@popfilename}%
}
\skvundef\skv@documentclass
\skvrobustdef*\skv@getdocumentclass{%
  \ifcase0%
    \ifx\@filelist\@undefined 1\fi
    \ifx\@filelist\relax 1\fi
    \ifx\@filelist\@gobble 1\fi\relax
    \skvcommaparse*\@filelist\skv@tempa{%
      \filename@parse\skv@tempa
      \ifx\filename@ext\@clsextension
        \skvifcsdefFT{opt@\filename@area\filename@base.\filename@ext}{}{%
          \edef\skv@documentclass{%
            \filename@area\filename@base.\filename@ext
          }%
        }%
      \fi
      \ifx\skv@documentclass\@undefined\else\skvbreakloop\fi
    }%
  \fi
}

% The following packages need access to the original \@classoptionslist:
\skvnewdef*\skv@optionprocessorpackages{%
  xkeyval,kvoptions,catoptions,biblatex,pgfopts,ltxkeys%
}
% Filter class options to remove those with '=':
\skvrobustdef*\skv@filterclassoptions{%
  \ifcase0%
    \ifx\@classoptionslist\@undefined 1\fi
    \ifx\@classoptionslist\relax 1\fi\relax
    \global\let\skv@filterclassoptions\relax
    \skvkvnormalize\@classoptionslist
    \let\skvoriginalclassoptionslist\@classoptionslist
    \let\skv@classoptionslist\@classoptionslist
    \let\@classoptionslist\@empty
    \skvcommaloop*\skvoriginalclassoptionslist\skv@tempa{%
      \skvxifinTF{=}{\skvexpandonce\skv@tempa}{}{%
        \skvaddtolist*\@classoptionslist\skv@tempa
      }%
    }%
    \def\@fileswith@ptions##1[##2]##3{%
      \edef\skv@tempa{\unexpanded{##3}}%
      \skvcsvnormalize\skv@tempa
      \skvcommaloop*\skv@optionprocessorpackages\skv@prova{%
        \skvxifinTF{,\skv@prova,}{,\skv@tempa,}{%
          \let\@classoptionslist\skvoriginalclassoptionslist
          \skvbreakloop
        }{}%
      }%
      \skvifnextchar[{\@fileswith@pti@ns##1[##2]##3}%
        {\@fileswith@pti@ns##1[##2]##3[]}%
    }%
  \fi
}
\skvrobustdef*\skvbeforebegindocument{%
  \skvgappendtomacro\skv@beforebegindoc
}
\skvnewdef*\skv@beforebegindoc{}
\skvprependtomacro\document{%
  \endgroup
  \let\skvbeforebegindocument\@firstofone
  \skv@beforebegindoc
  \gdef\skvbeforebegindocument{\skv@notprerr\skvbeforebegindocument}%
  \global\let\skv@beforebegindoc\relax
  \begingroup
}
\skvrobustdef*\skvafterbegindocument{%
  \skvgappendtomacro\skv@afterbegindoc
}
\skvnewdef*\skv@afterbegindoc{}
\skvgappendtomacro\document{%
  \let\skvafterbegindocument\@firstofone
  \skv@afterbegindoc
  \gdef\skvafterbegindocument{\skv@notprerr\skvafterbegindocument}%
  \global\let\skv@afterbegindoc\relax
  \ignorespaces
}
\skvrobustdef*\skv@notprerr#1{%
  \@latex@error{Command \detokenize{#1} should be used only
    in preamble}\skv@ehd
}
\skvnewdef*\skv@everypagehook{}
\skvrobustdef*\skvatbegineverypage{\skvgappendtomacro\skv@everypagehook}
\skvafterbegindocument{%
  \let\skv@savedoutputpage\@outputpage
  \def\@outputpage{%
    \let\skv@savedbegindvi\@begindvi
    \def\@begindvi{%
      \skv@everypagehook
      \skv@savedbegindvi
    }%
    \skv@savedoutputpage
    \let\@begindvi\skv@savedbegindvi
  }%
}

\skvnewdef*\skv@preamblecmdhook{}
\skvrobustdef*\skvonlypreamble#1{%
  \def\skv@provb##1{%
    \skvifntypeTF{##1}{}{%
      \skv@err{More than one macro
        \MessageBreak '\detokenize{##1}'.
        \MessageBreak Maybe a comma is missing in the list}\skv@ehd
    }%
    \skvxifinTF{\detokenize{\do##1}}{\skvoxdetok\skv@preamblecmdhook}{%
      \skv@warn{Command '\noexpand##1' multiply
        \MessageBreak submitted to \string\skvonlypreamble: ignored}%
    }{%
      \xdef\skv@preamblecmdhook{%
        \skvexpandonce\skv@preamblecmdhook\unexpanded{\do##1}%
      }%
    }%
  }%
  \skvcommaparse{#1}\skv@prova{%
    \expandafter\skv@provb\expandafter{\skv@prova}%
  }%
}
\AtEndOfPackage{%
  \skvafterbegindocument{%
    \def\do#1{%
      \skvifdefTF#1{%
        \gdef#1{\@latexerr{'\string#1' is a preamble command}\skv@ehd}%
      }{%
        \ifx\relax#1\else
          \@@warning{Undefined command '\unexpanded{#1}'
            \MessageBreak appeared in \string\skvonlypreamble.
            \MessageBreak Only defined commands should be
            \MessageBreak submitted to \string\skvonlypreamble.}%
        \fi
      }%
    }%
    \skv@preamblecmdhook
    \let\skv@preamblecmdhook\relax
    \let\do\relax
  }%
}

%%+++++++++++++++++ Utilities for handling options ++++++++++++++++%%

% \skvunknownoptionhandler[<prefixes>]<<families>>{<handler>}
%
\skvrobustdef*\skvunknownoptionhandler{%
  \skv@testopt\skv@unknownoptionhandler\skvdefaultprefix
}
\skvrobustdef*\skv@unknownoptionhandler[#1]{%
  \skvifnextchar<{\skv@unkn@wnoptionhandler{#1}}%
    {\skv@unkn@wnoptionhandler{#1}<\@currname.\@currext>}%
}
\skvrobustdef*\skv@unkn@wnoptionhandler#1<#2>{%
  \skv@unknownkeyhandler[#1]{#2}%
}
\skvrobustdef*\skv@testopte#1{\skv@testopta{\skv@t@stopte{#1}}}
\skvrobustdef*\skv@t@stopte#1{\skv@testopt{\skv@t@st@pte{#1}}\skvdefaultprefix}
\skvrobustdef*\skv@t@st@pte#1[#2]{%
  % Only one prefix is allowed:
  \skvxifinTF{,}{\detokenize{#2}}{%
    \skv@err{Only one prefix is allowed, but you gave '#2'}\skv@ehd
  }{%
    \skv@makeprefix{#2}%
    \skvifnextchar<{\skv@@t@st@pte{#1}}%
      {\skv@@t@st@pte{#1}<\@currname.\@currext>}%
  }%
}
\skvrobustdef*\skv@@t@st@pte#1<#2>{%
  \edef\skv@fams{#2}%
  \skvxifinTF{,}{\detokenize{#2}}{%
    \skvcsvnormalize\skv@fams
  }{%
    \skvdespacecontent\skv@fams
  }%
  \skv@testopt{#1}{}%
}

\skvrobustdef*\skveveryunknownoption{\skvdeclareoption*}
% \skvdeclareoption[<pref>]<<fam>>{<key>}[<defa>]{<callback>}
% \skvdeclareoption*{<message>}
\skvrobustdef*\skvdeclareoption{%
  \let\@fileswith@pti@ns\@badrequireerror
  \let\skvdefkey\skvordkey
  \skvifstar\skv@dox\skv@dox@a
}
% \skvdeclarevoidoption[<pref>]<<fam>>{<key>}[<defa>]{<callback>}
\skvrobustdef*\skvdeclarevoidoption{%
  \let\@fileswith@pti@ns\@badrequireerror
  \let\skvdefkey\skvvoidkey
  \skv@dox@a
}
% \skvdeclareobsoleteoption
%   [<pref>]{<fam>}{<obsolete key>}{<new key>}[<defa>]{<callback>}
\skvrobustdef*\skvdeclareobsoleteoption{%
  \let\@fileswith@pti@ns\@badrequireerror
  \let\skvdefkey\skvobsoletekey
  \skv@dox@a
}

% \skvdeclarebooloption[<pref>]<<fam>>[<mp>]{<key>}[<defa>]{<callback>}
\skvrobustdef*\skvdeclarebooloption{%
  \let\@fileswith@pti@ns\@badrequireerror
  \let\skvdefkey\skvboolkey
  \skv@dox@a
}
% \skvdeclarecmdoption[<pref>]<<fam>>[<mp>]{<key>}[<defa>]{<callback>}
\skvrobustdef*\skvdeclarecmdoption{%
  \let\@fileswith@pti@ns\@badrequireerror
  \let\skvdefkey\skvcmdkey
  \skv@dox@a
}

% Our default action for unknown options is tied to \@currname
% and \@currext:
\skvrobustdef\skv@dox#1{%
  \skvcsedef{skv@dox@\@currname.\@currext}{%
    \unexpanded{%
      \ifx\skvcurrentvalue\skv@novaluetoks
        \def\skvcurrentvalue{no value}%
      \fi
      #1%
    }%
  }%
}
\skvrobustdef*\skv@dox@a{\skv@testopt\skv@dox@b\skvdefaultprefix}
\skvrobustdef*\skv@dox@b[#1]{%
  \skvifnextchar<{\skv@dox@c{#1}}{\skv@dox@c{#1}<\@currname.\@currext>}%
}
\skvrobustdef*\skv@dox@c#1<#2>{\skvdefkey[#1]{#2}}

% Declare options with default values that will be used when the options
% are called without user values.
%
% \skvdeclarepassedoptions[<pref>]{<fam>}{<option>=<default>,...}
%
% Example:
%
%  \skvdeclarepassedoptions[KV]{fam}{%
%    hyperref={colorlinks,breaklinks},xcolor=svgnames
%  }
%
\skvrobustdef*\skvdeclarepassedoptions{%
  \skv@testopt\skv@declarepassedoptions\skvdefaultprefix
}
\skvrobustdef*\skv@declarepassedoptions[#1]#2#3{%
  \skvparsekvlist{#3}\skv@tempa{%
    \skvexpbracenext\skv@kvsplit\skv@tempa{%
      \skvdeclareoption[#1]<#2>{##1}[##2]{%
        \skvifcsdefTF{ver@##1.sty}{%
          \skv@warn{Package '##1' has been loaded and
            \MessageBreak now you're passing options to it.
            \MessageBreak Instruction ignored}%
        }{%
          \skvpassoptionstopackage{####1}{##1}%
          \AtBeginDocument{%
            \skvifpackageloadedTF{##1}{}{%
              \skv@warn{Options were passed to package
                \MessageBreak '##1' but it was never loaded}%
            }%
          }%
        }%
      }%
    }%
  }%
}
% \skvpassoptionstopackage{<opts>}{<pkg>}
\skvrobustdef*\skvpassoptionstopackage{\skv@passoptions{sty}}
\skvrobustdef*\skvpassoptionstoclass{\skv@passoptions{cls}}
\skvrobustdef*\skv@passoptions#1#2#3{%
  \begingroup
  \edef\@elt{opt@\skvtrimspace{#3}.#1}%
  \skvcsxdef{\@elt}{%
    \skvifcsdefFT{\@elt}{}{\@nameuse{\@elt},}%
    \skvtrimspace{#2}%
  }%
  \endgroup
}

% Pass options to package and load the package after processing options.
%
% \skvdeclarepassedoptionsloadpackage
%    [<pref>]{<fam>}{<option>=<default>,...}
%
\skvrobustdef*\skvdeclarepassedoptionsloadpackage{%
  \skv@testopt\skv@declarepassedoptions@load\skvdefaultprefix
}
\skvrobustdef*\skv@declarepassedoptions@load[#1]#2#3{%
  \skvparsekvlist{#3}\skv@tempa{%
    \skvexpbracenext\skv@kvsplit\skv@tempa{%
      \skvdeclareoption[#1]<#2>{##1}[##2]{%
        \skvifcsdefTF{ver@##1.sty}{%
          \skv@warn{Package '##1' has been loaded and
            \MessageBreak now you've asked for it to be
            \MessageBreak loaded again. Instruction ignored}%
        }{%
          \skvafterprocessoptions{%
            \RequirePackage[####1]{##1}%
          }%
        }%
      }%
    }%
  }%
}

% \skvexecuteoptions[<pref>]<fams>[<na>]{<kvlist>}
% \skvexecuteoptions+[<pref>]<fams>[<na>]{<kvlist>}
%
% This has no star (*) variant; any star suffix is quietly ignored.
%
\skvrobustdef*\skvexecuteoptions{%
  \skv@testopte{\skv@stfalse\skv@setkeys@a}%
}

% \skvprocessoptions*+[<pref>]{<fams>}[<na>]
%
% 1. If not using LaTeX, then no processing of options.
% 2. The plus (+) variant of \skvprocessoptions will process the options
%    in all the listed families. The star (*) form of \skvprocessoptions
%    -- like in LaTeX2e -- will also copy and use class options.
% 3. Class options are always processed first, but class options that ocurr
%    also as local/package options are dropped from the list of options
%    to be processed. That is, package options always take priority over
%    class options.
% 4. The \ProcessOptionsX of xkeyval package doesn't expect any plus (+)
%    suffix: it processes options only in a single family.
%
% 5. \skvpackagelist contains the list of loaded packages with their
%    options that are found on the current paths. See
%    <https://groups.google.com/forum/#!topic/comp.text.tex/XErNCMcT_jc>
%    for the rationale. Example:
%
%       \usepackage[option1,option2]{foobar}
%       \show\skvpackagelist
%       \expandafter\show\csname foobar.sty.poxkeys\endcsname
%
\skvnewlet\skvpackagelist\@empty
\skvrobustdef*\skvprocessoptions{%
  \skv@getdocumentclass
  \ifdefined\skv@documentclass
    \global\let\skv@getdocumentclass\relax
    \skv@filterclassoptions
  \fi
  \skv@testopte\skv@pox
}
\skvnewlet\skv@savprocessoptions\skvprocessoptions
\skvrobustdef*\skv@badprocessoptions{%
  \skv@testopte{%
    \skv@err{\noexpand\skvprocessoptions can't be nested}\skv@ehd
  }%
}
\skvrobustdef*\skv@pox[#1]{%
  \skv@inpoxtrue
  \let\@fileswith@pti@ns\@badrequireerror
  \let\skvprocessoptions\skv@badprocessoptions
  \begingroup
  \edef\skv@userclassorpackage{\@currname.\@currext}%
  \let\skv@classoptionsfound\@empty
  \let\skv@classorpackageoptions\@empty
  % The list of pox keys for each family, simply for taking
  % pox keys outside the current scope:
  \let\skv@exitpoxkeys\@empty
  % The list of pox keys in all familes:
  \let\skvcurrentpoxkeys\@empty
  \ifx\skv@userclassorpackage\skv@documentclass
    \skv@inclasstrue
    \let\@unusedoptionlist\skv@classoptionslist
  \else
    \skv@inclassfalse
    \ifcase0%
      \ifx\skv@classoptionslist\@undefined 1\fi
      \ifx\skv@classoptionslist\@empty 1\fi
      \ifx\skv@classoptionslist\relax 1\fi\relax
      \ifskv@st
        \def\ifkeyundef##1##2##3{\skvexpanded{\skvifkeydefFT[##1]{##2}{##3}}}%
        \skvcommaloop*\skv@classoptionslist\CurrentOption{%
          \expandafter\expandafter\expandafter
            \skv@g@tkeyname\CurrentOption=\skv@getname@nil\skvcurrentkey
          % Test if key is defined in one of the families. The search will
          % stop as soon as the key is found in any of the families.
          \ifkeyundef\skvcurrentprefix\skv@fams\skvcurrentkey{}{%
            \edef\skv@classoptionsfound{%
              \skvaddlist,\skv@classoptionsfound\skvexpandonce\CurrentOption
            }%
            \expandafter\skv@removeoption\expandafter{\CurrentOption}%
          }%
        }%
        \ifx\skv@classoptionsfound\@empty\else
          \skvexpbracenext\skv@getnamesofkeys\skv@classoptionsfound\skv@tempd
          \skvexpbracenext\skv@getpoxkeys\skv@tempd
        \fi
      \fi
    \fi
  \fi
  \skvletcs\skv@classorpackageoptions{opt@\@currname.\@currext}%
  \ifx\skv@classorpackageoptions\relax
    \def\skv@classorpackageoptions{}%
  \fi
  \skvifemptyTF\skv@classorpackageoptions{}{%
    \skvexpbracenext\skv@getnamesofkeys\skv@classorpackageoptions\skv@tempd
    \skvexpbracenext\skv@getpoxkeys\skv@tempd
    % Package options have higher priority than class options. Hence
    % filter class options \skv@classoptionsfound that are also present
    % as package options \skv@classorpackageoptions:
    \skvifxTF\skv@userclassorpackage\skv@documentclass{}{%
      \skvifemptyTF\skv@classoptionsfound{}{%
        \skvcommaloop*\skv@classoptionsfound\CurrentOption{%
          \expandafter\skv@g@tkeyname\CurrentOption=\skv@getname@nil\skv@tempa
          \skvxifinTF{,\skvoxdetok\skv@tempa,}{,\skvoxdetok\skv@tempd,}{}{%
            \edef\skv@classorpackageoptions{%
              \skvaddlist,\skv@classorpackageoptions
              \skvexpandonce\CurrentOption
            }%
          }%
        }%
      }%
    }%
  }%
  % Get document class options that are on the current paths:
  \ifx\skv@userclassorpackage\skv@documentclass
    \def\skvclassoptionsfound{}%
    \skvcommaloop*\skv@classorpackageoptions\skv@prova{%
      \expandafter\skv@g@tkeyname\skv@prova=\skv@getname@nil\skvcurrentkey
      \edef\skv@prova{[\skvcurrentprefix]{\skv@fams}{\skvcurrentkey}}%
      \expandafter\skvifkeydefTF\skv@prova{%
        \edef\skvclassoptionsfound{%
          \skvaddlist,\skvclassoptionsfound\skvcurrentkey
        }%
      }{}%
    }%
  \else
    \let\skvclassoptionsfound\skv@classoptionsfound
  \fi
  % \skvpackagelist is populated by all calls to \skvprocessoptions.
  \skvletcs\skv@prova{\@currname.\@currext.poxkeys}%
  \edef\skvpackagelist{%
    \skvaddlist,\skvpackagelist
    \skvifdefFT\skv@prova{}{\@currname.\@currext{\skv@prova}}%
  }%
  \let\do\skvcmdexit
  \skvexpanded{\endgroup
    \do\skvclassoptionsfound\do\skvcurrentpoxkeys
    \do\skvpackagelist\do\@unusedoptionlist
    \skvboolexit\ifskv@inclass\skv@exitpoxkeys
    % There may be preset keys even when \skv@classorpackageoptions is empty:
    \skvsetkeys\ifskv@pl+\fi[\skvcurrentprefix]{\skv@fams}[#1]%
      {\skvexpandonce\skv@classorpackageoptions}%
  }%
  \skvcslet{skv@dox@\@currname.\@currext}\relax
  \skv@inpoxfalse
  \let\@fileswith@pti@ns\@@fileswith@pti@ns
  \let\skvprocessoptions\skv@savprocessoptions
  \AtEndOfPackage{\let\@unprocessedoptions\relax}%
  \csname skv@\@currname.\@currext @afterprocess@hook\endcsname
  \skvcslet{skv@\@currname.\@currext @afterprocess@hook}\relax
}

% \skvprocessoptionswithclassoptions*+[<pref>]{<fams>}[<na>]
%
% 1. The star (*) suffix is always assumed present, even when the
%    user hasn't put it.
%
\skvrobustdef*\skvprocessoptionswithclassoptions{%
  \skv@testopte\skv@processoptionswithclassoptions
}
\skvrobustdef*\skv@processoptionswithclassoptions[#1]{%
  \skv@sttrue\skv@pox[#1]%
}

% \skvprocessoptionswithoutclassoptions*+[<pref>]{<fams>}[<na>]
%
% 1. The star (*) suffix is always assumed absent, even when the
%    user has put it.
%
\skvrobustdef*\skvprocessoptionswithoutclassoptions{%
  \skv@testopte\skv@processoptionswithoutclassoptions
}
\skvrobustdef*\skv@processoptionswithoutclassoptions[#1]{%
  \skv@stfalse\skv@pox[#1]%
}

% \skv@getpoxkeys{<keys>}
%
% 1. Get pox keys (ie, keys processed as options) from package or
%    class options.
% 2. This isn't a user command! See \skvgetdefinedkeys in file
%    skeyval-core.tex.
\skvrobustdef*\skv@getpoxkeys#1{%
  \begingroup
  \skvcommaloop*\skv@fams\skvcurrentfamily{%
    \skv@makeheader\skvcurrentfamily
    % Prepare to take poxkeys outside the group:
    \skvxifinTF{\skvoxdetok\skv@header}{\skvoxdetok\skv@exitpoxkeys}{}{%
      \edef\skv@exitpoxkeys{%
        \skvexpandonce\skv@exitpoxkeys
        \noexpand\skvcsexit{\skvcurrentpath.@poxkeys}%
      }%
    }%
    \edef\skv@prova{\@currname.\@currext.poxkeys}%
    \skvxifinTF{\skvoxdetok\skv@prova}{\skvoxdetok\skv@exitpoxkeys}{}{%
      \edef\skv@exitpoxkeys{%
        \skvexpandonce\skv@exitpoxkeys\noexpand\skvcsexit{\skv@prova}%
      }%
    }%
    \skvcommaloop{#1}\skvcurrentkey{%
      \skvifcsdefFT{\skv@header\skvcurrentkey.@cbk}{}{%
        \skvletcs\skv@prova{\skvcurrentpath.@poxkeys}%
        \skvifdefTF\skv@prova{%
          \skvxifinTF{,\skvcurrentkey,}{,\skv@prova,}{}{%
            \skvcsedef{\skvcurrentpath.@poxkeys}{%
              \skvaddlist,\skv@prova\skvcurrentkey
            }%
          }%
        }{%
          \skvcsedef{\skvcurrentpath.@poxkeys}{\skvcurrentkey}%
        }%
        \skvletcs\skv@prova{\@currname.\@currext.poxkeys}%
        \skvifdefTF\skv@prova{%
          \skvxifinTF{,\skvcurrentkey,}{,\skv@prova,}{}{%
            \skvcsedef{\@currname.\@currext.poxkeys}{%
              \skvaddlist,\skv@prova\skvcurrentkey
            }%
          }%
        }{%
          \skvcsedef{\@currname.\@currext.poxkeys}{\skvcurrentkey}%
        }%
        \skvxifinTF{,\skvcurrentkey,}{,\skvcurrentpoxkeys,}{}{%
          \edef\skvcurrentpoxkeys{%
            \skvaddlist,\skvcurrentpoxkeys\skvcurrentkey
          }%
        }%
      }%
    }%
  }%
  \let\do\skvcmdexit
  \skvexpanded{\endgroup
    \do\skvcurrentpoxkeys
    % We need the list in \skv@exitpoxkeys outside the current scope.
    % It will be used to take poxkeys (on each path) outside the scope
    % in \skv@pox:
    \do\skv@exitpoxkeys
    % We need the poxkeys on each path outside the current scope:
    \skv@exitpoxkeys
  }%
}

% +++++++++ Utilities for handling options via \directkeys +++++++++%

% \dirkeys@declareoptions{<star>}{<list>}
%
% <star>, if present, means new options.
%
\skvrobustdef*\dirkeys@declareoptions#1#2{%
  \let\@fileswith@pti@ns\@badrequireerror
  \begingroup
  % The boolean skv@inopt differs from skv@inpox. skv@inopt is only
  % meant to set the default family in \dirkeys@setdefaultpath
  % when dealing with options.
  \skv@inopttrue
  \def\skv@tempa{}%
  \edef\skv@tempb{\unexpanded{#2}}%
  \def\skv@pathdo##1##2{%
    \edef\skv@tempa{%
      \skvexpandonce\skv@tempa
      \skvdefinekeys#1[##1]{##2}%
      [\dirkeys@holderprefixtoks]{\skvexpandonce\skv@tempb}%
    }%
  }%
  \dirkeys@pathlist
  \expandafter\endgroup\skv@tempa
}
% \dirkeys@executeoptions{<plus sign or empty>}{<kvlist>}
%
% 1. <no-plus> = Execute options on ONLY the first path found. If an
%    option isn't found on the given paths, report error (ie,
%    don't save the option to the list of 'remaining keys'). Unknown
%    options should be flagged by an error immediately. Hence no
%    star (*) form of \dirkeys@executeoptions.
% 2. <plus> = Execute options on all the prevailing paths. If an
%    option isn't found on the given paths, flag error.
%
\skvrobustdef*\dirkeys@executeoptions#1#2{%
  \begingroup
  \skv@inopttrue
  % If the number of families is greater than one, gnored keys
  % from different families will mixed. This is the case even in
  % \skvsetkeys.
  \skvemptify{\skv@igkeys,\skv@fams}%
  \@tempcnta\skvz@
  \def\skv@pathdo##1##2{%
    \advance\@tempcnta\@ne
    \def\skv@pref{##1}%
    \ifnum\@tempcnta=\@ne
      \def\skv@firstpref{##1}%
    \else
      \ifx\skv@pref\skv@firstpref\else
        \skv@err{You can't use multiple prefixes when
          \MessageBreak calling the handler '.execute options'.
          \MessageBreak Check your values of '.prefix' and '.paths'}\skv@ehd
      \fi
    \fi
    \skvxifinTF{,##2,}{,\skv@fams,}{}{%
      \edef\skv@fams{\skvaddlist,\skv@fams##2}%
    }%
    \skvletcs\skv@prova{##1/##2/.@ignoredkeys}%
    \ifdefined\skv@prova
      \edef\skv@igkeys{\skvaddlist,\skv@igkeys\skv@prova}%
    \fi
  }%
  \dirkeys@pathlist
  \ifx\skv@fams\@empty
    \skv@err{No family before calling '.execute options'}\skv@ehd
  \fi
  \skvexpanded{\endgroup
    \skvsetkeys#1[\skv@pref]{\skv@fams}[\skv@igkeys]%
  }{#2}%
}
\skvrobustdef*\dirkeys@processoptions#1#2{%
  \begingroup
  \skv@inopttrue
  % If the number of families is greater than one, gnored keys
  % from different families will mixed. This is the case even in
  % \skvprocessoptions.
  \skvemptify{\skv@igkeys,\skv@fams}%
  \@tempcnta\skvz@
  \def\skv@pathdo##1##2{%
    \advance\@tempcnta\@ne
    \def\skv@pref{##1}%
    \ifnum\@tempcnta=\@ne
      \def\skv@firstpref{##1}%
    \else
      \ifx\skv@pref\skv@firstpref\else
        \skv@err{You can't use multiple prefixes when
          \MessageBreak calling the handler '.process options'.
          \MessageBreak Check your values of '.prefix' and '.paths'}\skv@ehd
      \fi
    \fi
    \skvxifinTF{,##2,}{,\skv@fams,}{}{%
      \edef\skv@fams{\skvaddlist,\skv@fams##2}%
    }%
    \skvletcs\skv@prova{##1/##2/.@ignoredkeys}%
    \ifdefined\skv@prova
      \edef\skv@igkeys{\skvaddlist,\skv@igkeys\skv@prova}%
    \fi
  }%
  \dirkeys@pathlist
  \ifx\skv@fams\@empty
    \skv@err{No family before calling '.process options'}\skv@ehd
  \fi
  \skvexpanded{\endgroup
    \skvprocessoptions#1#2[\skv@pref]<\skv@fams>[\skv@igkeys]%
  }%
}

% ++++++++ Keys for the handler <.mega process options> +++++++++ %

\directkeys*{%
  .path={SKV/megapox},
  .holder prefix=dirkeys@pox@,
  .initialize keys after define=true,
  .new keys={
    .ord/.ignore options//
      \def\dirkeys@pox@igkeys{#1}
      \skvstripouterbraces{2}\dirkeys@pox@igkeys
    ,
    .ord/{.prefix,.options prefix}/\skvdefaultprefix/
      \skv@ifoneprefix{#1}{%
        \edef\dirkeys@pox@pref{#1}
        \skvstripouterbraces{2}\dirkeys@pox@pref
      }{%
        \skv@err{Only one prefix is allowed in
          \MessageBreak processing options}\skv@ehd
      }
    ,
    .ord/{.family,.families,.options families,.options family}/
      \@currname.\@currext/
      \edef\dirkeys@pox@fams{#1}
      \skvstripouterbraces{2}\dirkeys@pox@fams
      \skv@makepaths\dirkeys@pox@pref\dirkeys@pox@fams
        \dirkeys@megapox@pathlist\skv@pathdo
    ,
    .ord/{path,.paths,.option path,.option paths}/
      {KV/\@currname.\@currext}/
      \skv@formatpaths{#1}\dirkeys@megapox@pathlist
    ,
    .ord/{.copy class options,.include class options}/true/
      \edef\dirkeys@pox@copyclass{0\skvifstrcmpTF{#1}{true}{0}{1}}
    ,
  },
}

\skvnewnumbers[skv@]{megapoxdepth}
\skvrobustdef*\dirkeys@megaprocessoptions#1{%
  \skvpushfunctions\dirkeys@megapox{%
    \do\dirkeys@pathlist\do\skv@pathdo\do\dirkeys@megapox@pathlist
    \do\dirkeys@pox@igkeys\do\dirkeys@pox@copyclass
  }\skv@megapoxdepth
  \skvemptify{\dirkeys@megapox@pathlist,\dirkeys@pox@igkeys}%
  \let\dirkeys@pox@pref\skvdefaultprefix
  \def\dirkeys@pox@copyclass{01}%
  \skvsetkeys[SKV]{megapox}{#1}%
  \ifx\dirkeys@pox@igkeys\@empty
    % So that all '...@ignoredkeys' will be undefined:
    \let\dirkeys@pox@igkeys\undefined
  \fi
  \let\dirkeys@pathlist\dirkeys@megapox@pathlist
  \def\skv@pathdo##1##2{%
    \skvcslet{##1/##2/.@ignoredkeys}\dirkeys@pox@igkeys
  }%
  \dirkeys@pathlist
  \skvexpanded{%
    \dirkeys@processoptions\if\dirkeys@pox@copyclass*\fi{+}%
  }%
  \skvpopfunctions\dirkeys@megapox\skv@megapoxdepth
}

% +++++++++++++ Handlers for executing and processing options ++++++++++++ %

\directkeys*{%
  .new handlers={
    {.action for unknown options,.action for unknown options}={
      \let\@fileswith@pti@ns\@badrequireerror
      \skv@dox{#1}
    },
    {.declare option,.declare options,.define option,.define options}={
      \dirkeys@declareoptions{}{#1}
    },
    {.new option,.new options}={
      \dirkeys@declareoptions{*}{#1}
    },
    {.execute options,.executeoptions,.execute options in one family}={
      \dirkeys@executeoptions{}{#1}
    },
    {.execute options*,.executeoptions*}={
      \skv@err
        {Handler '.execute options*' is undefined}
        {Handler '.execute options' has no star (*) variant,
        \MessageBreak since we don't want to ignore unknown
        \MessageBreak options from within package or class file.}%
    },
    {.execute options+,.executeoptions+,.execute options in all families}={
      \dirkeys@executeoptions{+}{#1}
    },
    % 1. All <.process options> handlers will filter out ignored keys.
    % 2. <.process options*> will copy class options.
    {.process options,.processoptions,.process options in one family}={
      \dirkeys@processoptions{}{}
    },
    {.process options*,.processoptions*,
      .copy class options and process options,
      .copy class options and process options in one family}={
      \dirkeys@processoptions{*}{}
    },
    {.process options+,.processoptions+,.process options in all families}={
      \dirkeys@processoptions{}{+}
    },
    {.process options*+,.processoptions*+,
      .copy class options and process options in all families}={
      \dirkeys@processoptions{*}{+}
    },
    % The handler <.mega process options> will:
    % 1. Search all families in its key <paths>.
    % 2. Not filter ignored paths and keys; in fact, it will not
    %    use active paths and keys.
    % 3. The handler '.mega process options' has the keys <ignore options>,
    %    <options prefix>, <options families>, and <copy class options>.
    %    These keys have aliases.
    %    See an example later in this file.
    {.mega process options,.megaprocessoptions}={
      \dirkeys@megaprocessoptions{#1}
    },
    {.mega process options*,.megaprocessoptions*}={
      \dirkeys@megaprocessoptions{#1,copy class options}
    },
  },
  .handler let={
    {.action for unknown option,.every unknown option}=
      .action for unknown options,
  },
}

% Loading a package while in options section is illegal. The command
% \skvafterprocessoptions can be used to defer the loading of packages
% till after the options section:
\skvrobustdef*\skvafterprocessoptions{%
  \expandafter\skvgappendtomacro
  \csname skv@\@currname.\@currext @afterprocess@hook\endcsname
}
\skvnewlet\skvifpackageloadedTF\@ifpackageloaded

\skvnewdef*\skv@visiteduseoptions{01}
\skvrobustdef*\skv@removeoption#1{%
  \ifx\@unusedoptionlist\@empty\else
    \if\skv@visiteduseoptions\else
      \skvcsvnormalize\@unusedoptionlist
      \def\skv@visiteduseoptions{00}%
    \fi
    \begingroup
    \skv@g@tkeyname#1=\skv@getname@nil\skv@tempb
    \@onelevel@sanitize\skv@tempb
    \def\skv@tempa{}%
    \skvcommaloop*\@unusedoptionlist\skv@prova{%
      \expandafter\skv@g@tkeyname\skv@prova=\skv@getname@nil\skv@provb
      \@onelevel@sanitize\skv@provb
      \ifx\skv@provb\skv@tempb\else
        \edef\skv@tempa{\skvaddlist,\skv@tempa\skvexpandonce\skv@prova}%
      \fi
    }%
    \let\@unusedoptionlist\skv@tempa
    \skvaftergroupdef\@unusedoptionlist\endgroup
  \fi
}
\skvonlypreamble{%
  \skvdeclareoption,\skvexecuteoptions,\skvprocessoptions,\skv@removeoption,
  \skveveryunknownoption,\dirkeys@declareoptions,
  \dirkeys@megaprocessoptions,\dirkeys@processoptions,\dirkeys@executeoptions,
  \skvprocessoptionswithclassoptions,\skvprocessoptionswithoutclassoptions
}

%+++++++++++++++++ This package's options section ++++++++++++++++++%

\skvrobustdef*\setupskeyval{\skvsetkeys[SKV]{skeyval}}
\skv@inoptionsectrue
\directkeys*{%
  .every unknown option={
    \@onelevel@sanitize\CurrentOption
    \PackageWarning{skeyval}{Unknown option '\CurrentOption' ignored}%
  },
  .path=SKV/skeyval,
  .holder prefix=skv@,
  .new options={
    .bool/{verbose,tracingkeys}/true,
    .ord/{keyparser,key parser}/{,}/
      \def\skv@keyparser{#1}%
      \skvstripouterbraces{2}\skv@keyparser,
    .bool/compatibility/true/
      \ifskv@compatibility
        \skvafterprocessoptions{%
          \skvifpackageloadedTF{skeyval-bc}{}{%
            \RequirePackage{skeyval-bc}%
          }
        }%
      \fi
    ,
  },
  .execute options={
    tracingkeys=false,keyparser,verbose=false
  },
  .mega process options={
    .options prefix=SKV,
    .options families={skeyval,definekeys},
    .ignore options={},
    .copy class options,
  },
}
\skv@inoptionsecfalse

\skv@restorecodes
\endinput