I need parse with lex files from flex

Using flex create a program to process a LaTeX document, more

specifically graphics made with a subset of the Pgfplot library,

carrying out the necessary operations so that at the end of the processing

Allows you to display the following statistics:

– the title of the graph, if it has one.

– the minimum and maximum coordinates of the x axis.

– the number of graphs/series drawn by each type (2D or 3D).

– longest chart formula, if chart is not specified

by formula, the specification will be taken as a length reference

explicit coordinates.

It can be assumed as a simplification that in the LaTeX document only

There is a single tikzpicture element.

Comments and other LaTeX sections should be ignored, except

verbatim environments, whose content has to be ignored. To simplify

In practice, the start of the environment “\begin{verbatim}” and the

end of the same «\end{verbatim}» are always at the beginning of the line.

Also be careful with comments and character escaping.

REFS:

–

https://es.overleaf.com/learn/latex/Pgfplots_packa…

–

https://www.ctan.org/pkg/pgfplots

Attach the all files with test and my first code, not working.