algorithm2e - 不需要的垂直空间

Question

最近几天我遇到了一种奇怪的行为，algorithm2e它在 IF 块后产生了一个不需要的空格。

我在这里放了一个 MWE，它表明问题确实来自我的定制，而不是来自包algorithm2e。

我不明白我做错了什么......

奇怪的输出

平均能量损失

\documentclass{article} 
    \usepackage[utf8x]{inputenc} 
    \usepackage[longend]{algorithm2e} 

\makeatletter 
    \newcommand\@algoVerboseBlock[3]{% 
        \hspace{-0.8em} \KwSty{#1} \ifhmode \\ \fi #2 \ifhmode \\ \fi \hspace{-0.8em} \KwSty{#3}% 
    } 

    \newcommand\@algoDefVerboseIf[2]{% 
        \renewcommand\algocf@uIf[2]% 
            {\If@ifthen{##1}\If@noend{\@algoVerboseBlock{#1}{##2}{#2}}} 
% 
        \renewcommand\algocf@If[2]% 
            {\If@ifthen{##1}\If@noend{\@algoVerboseBlock{#1}{##2}{#2}}} 
% 
    } 
    \newcommand\@algoDefVerboseElse[2]{% 
        \renewcommand{\algocf@Else}[1]% 
            {\Else@else\If@endif{\@algoVerboseBlock{#1}{##1}{#2}}} 
        \renewcommand{\algocf@uElse}[1]% 
            {\Else@else\If@endif{\@algoVerboseBlock{#1}{##1}{#2}}} 
    } 
\makeatother 


\begin{document} 

\section{Default}

\begin{algorithm}[H]
    \uIf{1}{if...}%
    \Else{else... \\ \If{1}{if...}}%
\end{algorithm}


\section{Customization}

\makeatletter 
    \SetKwIF{If}{ElseIf}{Else}{Si}{Alors}{Sinon Si}{Sinon}{} 
    \@algoDefVerboseIf{Début Si}{Fin Si} 
    \@algoDefVerboseElse{Début Sinon}{Fin Sinon}  
\makeatother 

\begin{algorithm}[H]
    \uIf{1}{if...}%
    \Else{else... \\ \If{1}{if...}}%
\end{algorithm}

\end{document} 

Answer 1

这似乎是 algorithm2e 中的一个错误，它在没有任何自定义的情况下发生，应该报告给软件包作者；上一个版本中已经修复了一个类似的错误。

一种解决方法是在有问题的块之后写入\\[-\baselineskip]。这是您的示例，下面我给出了显示错误的最小示例。

\documentclass{article} 
    \usepackage[utf8x]{inputenc} 
    \usepackage[longend]{algorithm2e} 

\makeatletter 
    \newcommand\@algoVerboseBlock[3]{% 
        \hspace{-0.8em} \KwSty{#1} \ifhmode \\ \fi #2 \ifhmode \\ \fi \hspace{-0.8em} \KwSty{#3}% 
    } 

    \newcommand\@algoDefVerboseIf[2]{% 
        \renewcommand\algocf@uIf[2]% 
            {\If@ifthen{##1}\If@noend{\@algoVerboseBlock{#1}{##2}{#2}}} 
% 
        \renewcommand\algocf@If[2]% 
            {\If@ifthen{##1}\If@noend{\@algoVerboseBlock{#1}{##2}{#2}}} 
% 
    } 
    \newcommand\@algoDefVerboseElse[2]{% 
        \renewcommand{\algocf@Else}[1]% 
            {\Else@else\If@endif{\@algoVerboseBlock{#1}{##1}{#2}}} 
        \renewcommand{\algocf@uElse}[1]% 
            {\Else@else\If@endif{\@algoVerboseBlock{#1}{##1}{#2}}} 
    } 
\makeatother 


\begin{document} 

\section{Customization}

\makeatletter 
    \SetKwIF{If}{ElseIf}{Else}{Si}{Alors}{Sinon Si}{Sinon}{} 
    \@algoDefVerboseIf{Début Si}{Fin Si} 
    \@algoDefVerboseElse{Début Sinon}{Fin Sinon}  
\makeatother 

\begin{algorithm}[H]
    \uIf{1}{if...}%
    \Else{else... \\ \If{1}{if...}\\[-\baselineskip]}%
\end{algorithm}

\end{document} 

\documentclass{article}

\usepackage[utf8x]{inputenc}
\usepackage[longend]{algorithm2e}

\begin{document}
\thispagestyle{empty}

\begin{algorithm}[H]
    \If{1}{if...}%
    \Else{else... \\ \uIf{2}{if...}}%
\end{algorithm}

\end{document}