On 2018-06-07 07:58, David Kastrup wrote:
Aaron Hill <lilyp...@hillvisions.com> writes:
On 2018-06-07 06:34, Aaron Hill wrote:
Hi David,
Correct me if I am wrong, but the second definition is ***not***
usable as a
function. That is, it cannot accept a parameter for customizing the
markup. Unless `\etc` is something magical that is undocumented, the
resulting `\doubleBox` would have to be a complete idea.
(See ***correction*** above.)
I hate email sometimes... No ability to edit when you make a dumb
typing mistake. Sorry.
I don't understand what you consider "not a function" though. It is a
function with constrained form, but a function nevertheless since it
takes a text/markup parameter.
There are likely many pedants who would say that functions strictly have
non-zero arity, but that is neither here nor there.
The snippet you mentioned does not work as-is on 2.19.81, so I was
curious if there was something new going on with how to define
functions. As I originally suspected `\etc` was nothing more than a
placeholder for other, actual markup, your suggested definition of
`\doubleBox` ultimately becomes a fixed, parameter-less construct. That
is, you could not say `c\doubleBox foo`, which is what Urs was trying to
achieve. Is there something potentially unsound about using
define-event-function to that end?
-- Aaron Hill
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