Add symbol field to \newglossaryentry in \newcommand

Question

This is a continuation of my question question.

For a given code I would like to add symbol. For example:

\mathgloss{m}{mass}{kg}

MWE:

\documentclass{report}
\usepackage{enumitem}

\usepackage[colorlinks]{hyperref}
\usepackage{glossaries}
\makeglossaries

\newcommand{\mathgloss}[2]{%
    \newglossaryentry{#1}{name={#1},description={#2}}%
    \begin{description}[labelwidth=3em]%
      \item[\gls{#1}]#2%
    \end{description}%
}

\begin{document}

Consider the equation
\begin{equation}
e = m * c^2
\end{equation}
in which
\mathgloss{e}{energy}
\mathgloss{m}{mass}
\mathgloss{c}{speed of light}

\printglossaries

\end{document} 

I tried writing ("a blind shot"):

\newcommand{\mathgloss}[3]{%
    \newglossaryentry{#1}{name={#1},description={#2},symbol={#3}}%
    \begin{description}[labelwidth=3em]%
      \item[\gls{#1}]#2 #3%
    \end{description}%
}

...but I missed the target.

Answer 1

You have to choose a glossary style that prints the symbol field. You can find them on the Table 15.1 of the glossaries documentation.

If you choose, for example, the index style, you have then to print the glossary with

\printglossary[style=index]

MWE (I also changed a little the definition of \mathgloss):

\documentclass{report}
\usepackage{enumitem}
\usepackage{siunitx}

\usepackage[colorlinks]{hyperref}
\usepackage{glossaries}
\makeglossaries

\newcommand{\mathgloss}[3]{%
    \newglossaryentry{#1}{name={#1},description={#2},symbol={#3}}%
    \begin{description}[labelwidth=3em]%
      \item[\gls{#1}]#2 (\textbf{#3})%
    \end{description}%
}

\begin{document}

Consider the equation
\begin{equation}
e = m * c^2
\end{equation}
in which
\mathgloss{e}{energy}{J}
\mathgloss{m}{mass}{Kg}
\mathgloss{c}{speed of light}{m/s}

\printglossary[style=index]

\end{document} 

Output (document):

Output (glossary):