\documentclass[9pt]{article}

%% A minimal example of working OpenFOAM highlighting using minted
%% Compiles with all major engines (pdflatex, lualatex and xelatex)

\usepackage{amsmath, amsfonts}
\usepackage{tikz}
\usetikzlibrary{tikzmark}
\usepackage[cachedir=_minted-cache]{minted}
\makeatletter
\def\minted@jobname{openfoam-highlight}
\makeatother
%% Step 0: include the provided sty file
\input{minted-openfoam.sty}

\begin{document}
    %% Turn on Foam Highlighter in this section
    \usefoamhlttrue
    %% Use ?? for Tex escape inside the highlighter
    \renewcommand{\escapeinsidechar}{?}

    \LaTeX code and math mode in OpenFOAM comments
    \tikz[remember picture,overlay,baseline=0pt] \draw[->,thick,dashed,blue] (0,-0.5em)
    to[bend left] ([shift={(1ex,1ex)}]pic cs:code); and even inline OpenFOAM expressions
    \mintinline{cpp}{key val;} get highlighted.
    \inputminted[escapeinside=??]{cpp}{of-dicts/sampleDict}

    %% Turn if off to render other code snippets normally
    \usefoamhltfalse
\end{document}