Refer to table body in new environment

Question

I'm trying to create a new environment based on tabularx. I'd like it to have a \bottomrule at the end. How do I refer to the table rows on the new environment definition? Right now the bottom line is appearing above the rows instead of below them.

\documentclass{article}
\usepackage{array, booktabs, tabularx}

\newcolumntype{L}[1]{>{\hsize=#1\hsize\raggedright\arraybackslash}X}
\newenvironment{funtab}[1]{%
  \tabularx{\textwidth}{@{} L{0.4} L{0.6} L{2.0} @{}}
    \toprule
    Operation&\multicolumn{2}{l}{#1}\\
    \midrule
    %Table body location <------------------------
    \bottomrule
}{%
  \endtabularx
}

\begin{document}

\begin{funtab}{My function name goes here}
  item1 & item2 & item 3 \\
  item1 & item2 & item 3 which is long and should wrap around around around around \\
\end{funtab}

\end{document}

Answer 1

Apparently using \tabularx....\endtabularx 'annoys' \bottomrule, leaving no real tabular environment group, so group the \tabularx... content.

In any case the \bottomrule must be shifted to the \end... part of the tabular environment if it should appear there.

\documentclass{article}
\usepackage{array, booktabs, tabularx}

\newcolumntype{L}[1]{>{\hsize=#1\hsize\raggedright\arraybackslash}X}
\newenvironment{funtab}[1]{%
  \begingroup
  \tabularx{\textwidth}{@{} L{0.4} L{0.6} L{2.0} @{}}
    \toprule
    Operation&\multicolumn{2}{l}{#1}\\
    \midrule
    % Table body location <------------------------
}{%
  \bottomrule
  \endtabularx
  \endgroup
}

\begin{document}

\begin{funtab}{My function name goes here}
  item1 & item2 & item 3 \\
  item1 & item2 & item 3 which is long and should wrap around around around around \\
\end{funtab}

\end{document}