> I looked at that (and more) some time ago. For our tooling
> I created a wrapper around Ply. The feature of this wrapper are:
>
>  - Class oriented PlyScanner and PlyParser classes.
>
>  - Different modes (normal/debug/opt), which set different
>    settings of Ply.
>
>  - Table file creation is always done in the same directory
>    as the source files.
>
>  - Table files can be created for multiple classes in a single
>    file, with different start symbols.
>
>  - Automatic parse/scan error exceptions with line numbers
>    (without enabling the (slow) option to let ply track line
>    numbers).
>
>  - White-space is automatically skipped in the scanners (can
>    be modified by derived classes).
>
>  - Functions to generate/remove the table files.
>
>    - We always install the tooling we create on a central
>      machine to which all students have read access. However,
>      the students don't have write access and therefore can't
>      generate the table files. We have *_gentables.py files
>      that are used by the setup program to generate the table
>      files.
>
>  - Derived classes should only need to specify:
>
>    - list of tokens (scanner)
>    - t_* (scanner)
>    - p_* (parser)
>
> The plywrapper.py file is standalone and only needs Ply, except
> for the exception base class from one other file in our tooling.
> However, one could easily change it to inherit from StandardError
> instead...
>
<snip>

Dennis,

This is great, thanks a lot for sharing the code for PlyWrapper. I
will certainly have a look and see what I can gather from it for my
own parser development with PLY.

Eli

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