#67 [symbolic coords][bar] please allow absolute values

[Stefan Pinnow]

Currently an error is raised when one wants to use bar width, bar shift or enlargelimits in axis units. Please allow this. (Are there other keys where this feature would be useful, too?)

(Then providing an answer for http://tex.stackexchange.com/questions/355401/remove-the-space-between-bars-and-axis would have been much easier than redefining the whole plot.)

\documentclass[border=5pt]{standalone}
\usepackage{pgfplots}
    \pgfplotsset{
        compat=1.14,
    }
\begin{document}
\begin{tikzpicture}
    \begin{axis}[
        ybar,
        symbolic x coords={tool8,tool9,tool10},
        xtick=data,
%         % ---------------------------------------------------------------------
%        % currently not allowed:
%        bar width=0.5,
%        bar shift=-0.25,
%        {bar width=[normalize]0.5},
%        {bar shift=[normalzie]-0.25},
%        enlargelimits={abs=0.5},
%        % ---------------------------------------------------------------------
    ]
        \addplot coordinates {(tool8,7) (tool9,9) (tool10,4)};
        \addplot coordinates {(tool8,4) (tool9,4) (tool10,4)};
    \end{axis}
\end{tikzpicture}
\end{document}