list of requirements, problem with listing text of requirements

Question

I would like to have "requirements" in my document numbered. Then I wanted to have list of requirements, but not only number of requirement and corresponding page/section but also theirs text.

I tried with:

\newtheorem{requirement}{Req.}

\begin{requirement}
first requirement
\end{requirement}

some text 

\begin{requirement}
second requirement
\end{requirement}

But I couldn't create list of requirements.

I tried solution from (where I think the same problem is presented): Custom list of hypotheses in table of contents format

when I used thmtools I got the same result as using package ntheorem I mean:

Req. ...... 1
Req ....... 2

etc.

While I want something like:

first requirement ..... 1
second requirement .... 2

etc.

I was also thinking about another solution, what I need is to clone "figure" environment and clone table of figures, and then I can keep requirements in captions. However figure is a float, which is not what I want.

I know it is possible to use brackets [], but then I have to have to copies of the same text, one in [] second outside.

Thanks a lot,
Adam

first try:

\documentclass{book}

\usepackage{amsthm}
\renewcommand{\listtheoremname}{List of Requirements}
\newtheorem{requirement}{Req.}

\begin{document}
\listoftheorems{requirement}

\begin{requirement}
first requirement
\end{requirement}

some text.

\begin{requirement}
second requirement
\end{requirement}

\end{document}

second try:

\documentclass{book}

\usepackage{amsthm}
\usepackage{thmtools}
\declaretheorem[numberwithin=chapter]{requirement}

\renewcommand{\listtheoremname}{List of Requirements}



\begin{document}

\listoftheorems[ignoreall,show={requirement}]


\begin{requirement}
first requirement
\end{requirement}

some text.

\begin{requirement}
second requirement
\end{requirement}


\end{document}

Answer 1

You haven't gotten an answer for a while, so I figured I'd try and hack together a custom solution. This will probably require some tweaking for your specific desires, but it should work. Basically, I created a custom environment for the requirements that saves a copy of their text to the .aux file. The \listofrequirements macro then simply reads them from the .aux. (This of course requires at least two passes of LaTeX, though.)

Here is a documented example:

\documentclass{book}

%% This package will make dealing with the ``requirements'' environment a lot easier:
\usepackage{environ}

%% This counter is used to track the number of requirements:
\newcounter{requirements}
\setcounter{requirements}{0}

%% This is a macro that gets called by the .aux file to load in data.
\gdef\savedreq#1#2{\expandafter\gdef\csname req#1\endcsname{#2}}

%% This macro will save the given requirement to the .aux file so we will have it during the next LaTeX pass to put in the list:
\makeatletter
    \def\recordrequirement#1{\immediate\write\@mainaux{\string\savedreq{\the\value{requirements}}{#1}}}
\makeatother

\NewEnviron{requirement}{
  \noindent
  \begingroup
    %% Increment the requirement counter
    \refstepcounter{requirements}
    %% Here is the ``Req.'' text:
    \textbf{Req.~\arabic{requirements}}
    %% Make a label that we can use to refer to this counter:
    \label{req:\arabic{requirements}}
    %% Next, save this requirement to the .aux file so we will have it during the next LaTeX pass to put in the list:
    \recordrequirement{\BODY}
    %% We will make the remainder italic:
    \it
    \BODY
  \endgroup
}

\newcommand{\listofrequirements}{
  %% First, we need to make sure that this is not the first LaTeX pass (i.e., that all of the information has already been recorded to the .aux file):
  \expandafter\ifx\csname totalreqsplusone\endcsname\relax
    Please run \LaTeX\ again to populate this list!
  \else
    \begingroup
      %% This \reqi counter is what we are going to use to iterate over the requirements:
      \newcount\reqi
      \reqi=0
      \loop
        \advance\reqi by 1
      \ifnum\reqi<\totalreqsplusone
        %% The requirement numbered \reqi exists!
        \noindent\textbf{\the\reqi} \csname req\the\reqi\endcsname\leaders\hbox to 1em{\hss.\hss}\hfill\pageref{req:\the\reqi}\\
      \repeat
    \endgroup
  \fi
}

%% At the end of the document, we need to record to the .aux the total number of requirements!
\makeatletter
\AtEndDocument{
  \refstepcounter{requirements}
  \immediate\write\@mainaux{\string\xdef\string\totalreqsplusone{\the\value{requirements}}}
}
\makeatother

\begin{document}

\section*{List of Requirements}

\listofrequirements

\section*{Requirements}

\begin{requirement}
  First requirement!
\end{requirement}    \begin{requirement}
  Requirement number two!
\end{requirement}

\vfill
\pagebreak

\begin{requirement}
  You can even have very long requirements: Lorem ipsum dolor sit
  amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt
  ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis
  nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo
  consequat. Duis aute irure dolor in reprehenderit in voluptate velit
  esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat
  cupidatat non proident, sunt in culpa qui officia deserunt mollit
  anim id est laborum.
\end{requirement}

\end{document}

Here is like what the first page looks:

And here is the second page: