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Highlighting a Chunk of Code within a lstlisting

I have a bunch of code in a lstlisting environment. How can I highlight (color background) just a particular chunk of code within the environment?

Solution

  • You can use \colorbox and an escape character inside your listing:

    Add to your preamble

      \usepackage{color}

  \definecolor{light-gray}{gray}{0.80}

    then use it like this in your document:

      \begin{lstlisting}[escapechar=!]
  def mult(m: Matrix[Int], n: Matrix[Int]) {
    val p = !\colorbox{light-gray}{new MatrixInt}!(m.rows, n.cols)
  }
  \end{lstlisting}