environmentsitalic
I created a new environment:
\usepackage[dvipsnames]{xcolor}
\usepackage{mdframed}
\newenvironment{test}
{\begin{mdframed}[backgroundcolor=gray, linewidth=1pt]}
{\end{mdframed}}
I'd like to display the text inside the environment italic.
How can I do that?
The problem is that the \begin{...} and \end{...} pair commands automatically create a "group" so that, in effect, the & and \\ are "out of scope" for the tabular, while inside the "production" environment they just show up at a place where the compiler is not expecting them.
A second problem with your definitions is that, even if they would work, they would be adding an extra \\ at the end of the tabular, adding an unwanted space at the end. Perhaps some more appropriate definitions would be
\documentclass[a4paper,10pt]{article}
\newcommand{\production}[1]{#1 ::= &}
\newenvironment{grammar}{\tabular{p{3cm}l}}{\endtabular}
\begin{document}
\begin{grammar}
\production{XmlStartTag} ... \\
\production{XmlOtherTag} ... \\
\production{XmlEndTag} ...
\end{grammar}
\end{document}
Note no \\ at the end of the last production. Also in the definition of the grammar you don't need to repeat the work of \begin/\end, and you can instead directly use \tabular and \endtabular.
The package xeCJK provides AutoFakeSlant option. There is also AutoFakeBold. I do not have the font you called, so I will illustrate this by Arial Unicode MS.
Notice that latin letters are typeset in Latin Modern since \setCJKmainfont and \newCJKfontfamily affect only ideographs.
\documentclass{book}
\usepackage{xeCJK} %Use Chinese fonts
\setCJKmainfont{Arial Unicode MS}
\newCJKfontfamily\subheadfont[AutoFakeSlant]{Arial Unicode MS} %Define '\subheadfont'
\newcommand{\subhead}[1]{{\itshape \flushright \subheadfont --#1 \par}}
\begin{document}
\chapter{My Article}
\subhead{This is 副标题}
Some content in the article. 一些中文内容。
\end{document}
Best Answer
Credits to ChrisS, who answered this in the comments:
“Add
\itshapeto the end of your begin environment specification; after the closing bracket for the options tomdframed.”