%%
%% The LaTeX Companion, 3ed
%%
%% Example 16-7-39 on page II-567 in "Changing format directives".
%%
%% Copyright (C) 2022 Frank Mittelbach
%%
%% It may be distributed and/or modified under the conditions
%% of the LaTeX Project Public License, either version 1.3c
%% of this license or (at your option) any later version.
%%
%% See
https://www.latex-project.org/lppl.txt for details.
%%
\documentclass{tlc3exa}
\pagestyle{empty}
\setcounter{page}{6}
\setlength\textwidth{111.0pt}
%
\setlength\parindent{0pt}
% Use biber program
%StartShownPreambleCommands
\usepackage{biblatex} \addbibresource{tlc-ex.bib}
\DeclareListFormat{mylistformat}
{Location \thelistcount/\theliststop: #1%
\ifnumgreater{\value{listcount}}{\value{liststop}-1}%
{!}% -- list end reached
{,\\}% -- in list
}
%StopShownPreambleCommands
\begin{document}
\citelist{location-list}[mylistformat]{location}
\\[3pt]
\citelist{location-list}{location} % default directive
\end{document}
