Changing ref to eqref

Question

I have plenty of equations in my Tex which were labeled with (\ref{eqn: bla}) which I now want to change to \eqref{eqn: bla}. Is there a fast way to do this rather than manually doing it?

Answer 1

If there wouldn't be manual (...) parentheses, one could use a \ref wrapper command that checks whether the reference label name contains eqn: and use \eqref accordingly. But alas,... this is no solution for the (...) case.

Note I am not sure this will work in conjunction with cleveref or hyperref.

\documentclass{article}

\usepackage{xstring}
\usepackage{amsmath}


\let\origref\ref  % Prevent recursive definition

\makeatletter
\renewcommand{\eqref}[1]{%
  \textup{\tagform@{\origref{#1}}}%
}
\makeatother

\renewcommand{\ref}[1]{%
  \IfSubStr{#1}{eqn:}{%
    \eqref{#1}%
  }{%
    \origref{#1}%
  }%
}

\begin{document}

\section{First} \label{sec:first}



\begin{equation}
  E=mc^2 \label{eqn: bla}
\end{equation}

\section{Second} \label{sec:second}

In section \ref{sec:first} we have equation \ref{eqn: bla}
\end{document}