Readline without rlwrap about ciao

[jfmc]

Thanks! That is a good motivation.

I had a look and plugging it into the Ciao toplevel is not straightforward (e.g., proper interaction between readline input and the term parser for queries). I'll keep this issue open until there is some progress.

[jfmc]

Linking with readline is currently not implemented, but it does not seem very complicated. Would there be some advantage in readline lib vs rlwrapping? rlwrap was added as a quick fix to enhance Ciao usage from a terminal when outside Emacs.

[suhr]

It would be definitely much more convenient for people who do not use Emacs.

[jfmc]

The command ciao without arguments starts ciaosh under rlwrap (if available). Would it be enough? We'd like to know if there is some missing feature in the rlwrap solution.

[suhr]

We'd like to know if there is some missing feature in the rlwrap solution.

Actually there is. If you enter

?- X = (1,
2).

then there will be two queries in the history: X = (1, and 2).. The reason is simple: rlwrap knows nothing about Prolog syntax, it understands only lines.

By contrast, this is exactly one query in swipl.