我编写了自己的 beamer-class-template，它使用了 -package boolexpr。但是当将它与biblatex-package 结合使用时，它会产生 6 MByte 的日志文件和大量错误。首先是
(c:/texlive/2016/texmf-dist/tex/latex/biblatex/blx-dm.def
! Undefined control sequence.
\do ...lx@dm@datatype }{#1}}\par \par \ifboolexpr
{test {\ifcsstring {blx@dm...
l.447 volumes}
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.
! LaTeX Error: Missing \begin{document}.
See the LaTeX manual or LaTeX Companion for explanation.
Type H <return> for immediate help.
...
l.447 volumes}
You're in trouble here. Try typing <return> to proceed.
If that doesn't work, type X <return> to quit.
! Argument of \@secondoftwo has an extra }.
<inserted text>
\par
l.447 volumes}
I've run across a `}' that doesn't seem to match anything.
For example, `\def\a#1{...}' and `\a}' would produce
this error. If you simply proceed now, the `\par' that
I've just inserted will cause me to report a runaway
argument that might be the root of the problem. But if
your `}' was spurious, just type `2' and it will go away.
Runaway argument?
! Paragraph ended before \@secondoftwo was complete.
<to be read again>
\par
l.447 volumes}
I suspect you've forgotten a `}', causing me to apply this
control sequence to too much text. How can we recover?
My plan is to forget the whole thing and hope for the best.
我的文件是
\documentclass[screen, aspectratio=43]{beamer}
\usetheme{test}
\usepackage{biblatex}
\begin{document}
Hello
\end{document}
作为主文件和
\ProvidesClass{beamerthemetest}
\mode
<presentation>
% Set some style dependent values
\usepackage{boolexpr}
\ifcsname ifboolexpr\endcsname
\makeatletter
\let\ifboolexpr\@undefined
\makeatother
\fi
\mode
<all>
作为样式文件。如何biblatex在主文件中使用 -package，同时仍在boolexpr主题文件中保留 -package？
如果我删除 undef-part（即\if...\fi，我会收到以下错误（第一部分）：
(c:/texlive/2016/texmf-dist/tex/latex/biblatex/blx-dm.def
! Missing number, treated as zero.
<to be read again>
\protect
l.447 volumes}
A number should have been here; I inserted `0'.
(If you can't figure out why I needed to see a number,
look up `weird error' in the index to The TeXbook.)
! Missing = inserted for \ifnum.
<to be read again>
\begingroup
l.447 volumes}
I was expecting to see `<', `=', or `>'. Didn't.
! Missing number, treated as zero.
<to be read again>
\begingroup
l.447 volumes}
A number should have been here; I inserted `0'.
(If you can't figure out why I needed to see a number,
look up `weird error' in the index to The TeXbook.)
! Missing \endcsname inserted.
<to be read again>
\begingroup
l.447 volumes}
The control sequence marked <to be read again> should
not appear between \csname and \endcsname.
! LaTeX Error: Unknown relation found while scanning \boolexpr !.
See the LaTeX manual or LaTeX Companion for explanation.
Type H <return> for immediate help.
...
l.447 volumes}
You're in trouble here. Try typing <return> to proceed.
If that doesn't work, type X <return> to quit.
我对这个包裹的申请boolexpr是
\long\def\isequal#1#2{\pdf@strcmp{#1}{#2}}
\switch
\case{\isequal{\beamer@ntnu@style}{vertical}}
\setbeamercolor{footline}{fg=white}
\def\footlinealign{left}
\def\titlex{50pt}
\def\titley{70pt}
\def\pgnumoffset{7pt}
\setbeamersize{text margin left=2cm,text margin right=1em}
\case{\isequal{\beamer@ntnu@style}{horizontal}}
\setbeamercolor{footline}{fg=white}
\def\footlinealign{left}
\def\titlex{30pt}
\def\titley{70pt}
\def\pgnumoffset{0pt}
\setbeamersize{text margin left=1cm,text margin right=1em}
\otherwise
\setbeamercolor{footline}{fg=black}
\def\footlinealign{right}
\def\titlex{16pt}
\def\titley{110pt}
\def\pgnumoffset{0pt}
\setbeamersize{text margin left=1cm,text margin right=1em}
\endswitch
答案1
根据 beamer 通常处理主题选项的方式，以下可能是不使用软件包的解决方法boolexpr：
\documentclass[screen, aspectratio=43]{beamer}
\setbeamertemplate{footline}{
\begin{beamercolorbox}{footline}
sdjk
\end{beamercolorbox}
}
\usetheme[style=vertical]{ntnu}
\usepackage{biblatex}
\begin{document}
Hello
\end{document}
\mode<presentation>
\DeclareOptionBeamer{style}{\def\beamer@ntnu@style{#1}}
\ExecuteOptionsBeamer{style=vertical}
\ProcessOptionsBeamer
\def\beamer@ntnu@verticaltext{vertical}%
\def\beamer@ntnu@horizontaltext{horizontal}%
\ifx\beamer@ntnu@style\beamer@ntnu@verticaltext%
\setbeamercolor{footline}{fg=blue}
\def\footlinealign{left}
\def\titlex{50pt}
\def\titley{70pt}
\def\pgnumoffset{7pt}
\setbeamersize{text margin left=2cm,text margin right=1em}
\else%
\ifx\beamer@ntnu@style\beamer@ntnu@horizontaltext%
\setbeamercolor{footline}{fg=red}
\def\footlinealign{left}
\def\titlex{30pt}
\def\titley{70pt}
\def\pgnumoffset{0pt}
\setbeamersize{text margin left=1cm,text margin right=1em}
\else%
\setbeamercolor{footline}{fg=green}
\def\footlinealign{right}
\def\titlex{16pt}
\def\titley{110pt}
\def\pgnumoffset{0pt}
\setbeamersize{text margin left=1cm,text margin right=1em}
\fi
\fi%
\mode
<all>