With this code
\documentclass{article} \usepackage{xcolor} \usepackage{listings} \lstset{% language=[AlLaTeX]TeX, alsolanguage=MetaPost, texcsstyle=\color{blue}, basicstyle=\ttfamily% } \begin{document} \begin{lstlisting} $\sum_{n=1}^\infty\frac{1}{n^2}$. \end{lstlisting} \end{document} the \sum is not colored. But, if I replace MetaPost by pstricks, \sum turns into blue.
Someone could help me and explain the problem?
From the listings package documentation:
Bug:
texcs... interferes with other keyword lists. If, for example,emphcontains the wordfoo, then the control sequence\foowill show up inemphstyle.
Based on this I tried to declare MetaPost first and TeX second, and it worked.
Code
\documentclass{article} \usepackage{xcolor} \usepackage{listings} \lstset{% language=MetaPost, alsolanguage=[AlLaTeX]TeX, texcsstyle=\color{blue}, basicstyle=\ttfamily% } \begin{document} \begin{lstlisting} $\sum_{n=1}^\infty\frac{1}{n^2}$. \end{lstlisting} \end{document} You can also use a starred variant of texcsstyle to also highlight the backslash:
texcsstyle=*\color{blue} Result
