[Tex/LaTex] How to access toc entries with titletoc

boxescolortable of contentstitletoc

I'm bit lost with the content of titletoc.sty. I'd like to access toc entries, meaning chapter title, section title and so on to put them in a colorbox. I think it is somewhere in the \def\ttl@tocentry and I'd like to be able to write something like:

\titlecontents{chapter}[0pc]
{\colorbox{red}{chapter title}}
{}
{}
{}%

EDIT: MWE:

\documentclass[12pt]{report}
\usepackage{xcolor}
\usepackage{titletoc}
\titlecontents{chapter}%section
[0pc]%left
{}%above
{}%before with label
{}%before without label 
{}%filler and page 
[]%after

\begin{document}
\tableofcontents
\chapter{chapter title}
\end{document}

Best Answer

As explained in the manual: "As in \titleformat, the last command can take an argument with the title". So:

\titlecontents{chapter}[0pc]
{}
{\colorbox{red}} % the second argument is left implicit
{}
{}%
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