[Caml-list] [batteries] ... how to create (format) directives that do not take any arguments?

[Matej Kosik <5764c029b688c1c0d24a2e97cd764f@gmail.com>]

Dear all,

I would like to define custom directives, that would enable me to write code like e.g. this:

Print.printf "regular %bold_on bold %bold_off regular %italic_on italic %italic_off";

This might expand to (in HTML codes)

              regular <B>bold</B> regular <I>italic</I>

or in ANSI codes to something analogous.

I am currently looking at:

  http://ocaml-batteries-team.github.io/batteries-included/hdoc/BatPrint.html

It refers to:

  https://github.com/ocaml-batteries-team/batteries-included/blob/master/examples/snippets/test_printf.ml

Those things work, although there is no example for:

  Print.literal

which might be (?) what I need to employ.

Can somebody give me some advice how to create simple "parameterless format directives" (like those above)?

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Basically, I just want to refactor some weird markup out of the literal string while I do not want to reinsert the refactored stuff via %s because it is not maintainable.