How to avoid ligatures of double less equal sign in latex

Question

I have lots of C++ code snippets in my article. Just see the following tex content and you'll get what I mean.

\documentclass{article}
\usepackage[T1]{fontenc}
\usepackage{xspace}

\NewDocumentCommand{\code}{m}{\texttt{{#1}}}

\begin{document}
My code is \code{cout << hello << world;}\\
But I wish it looks like \verb|cout << hello << world;|
\end{document}

The different is « and <<.

How can I avoid ligatures in my \code macro.

Answer 1

You can use microtype as shown in How do I disable ligatures?:

\documentclass{article}
\usepackage[T1]{fontenc}
\usepackage{xparse}% not needed in recent kernels
\usepackage{xspace}
\usepackage{microtype}
\DisableLigatures{encoding=T1, family=tt*}

\NewDocumentCommand{\code}{m}{\texttt{{#1}}}

\begin{document}
My code is \code{cout << hello << world;}

But I wish it looks like \verb|cout << hello << world;|

Normal ff and ffi ligatures still here.
\end{document}