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Re: {SPAM 02.4} Re: Repeating \markup commands

From: David Kastrup
Subject: Re: {SPAM 02.4} Re: Repeating \markup commands
Date: Sun, 08 Apr 2018 20:26:41 +0200
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/26.0.50 (gnu/linux)

David Sumbler <address@hidden> writes:

> On Sun, 2018-04-08 at 16:56 +0200, David Kastrup wrote:
>> David Sumbler <address@hidden> writes:
>> > 
>> > The piece I am setting has a narrator.  For the score I have worked
>> > out
>> > a way of adding the narrator's short speeches over the music which
>> > gives the appearance I want.
>> > 
>> > It entails using the same markup commands for every individual
>> > speech,
>> > e.g.:
>> > 
>> > s^\markup { \whiteout \pad-markup #2 "Just listen!" }
>> > 
>> > (The s is an invisible rest)
>> > 
>> > It would be nice to be able to do something like:
>> > 
>> > s^\nar "Just listen!"
>> > 
>> > How could nar be defined in this case?
>> Current development version:
>> nar = ^\markup \whiteout \pad-markup #2 \etc
>> Older stuff:
>> nar =
>> #(define-event-function (parser location m) (markup?)
>>    #{ ^\markup \whiteout \pad-markup #2 #m #})
>> Not that much worse, actually.
> \version "2.19.81"
> nar = ^\markup \whiteout \pad-markup #2 \etc

2.21.0 to be is required, but for 2.19.81 you can at least omit the
somewhat cryptic "parser location" parameters.

> Unfortunately the above produces "syntax error, unexpected \etc"
> The older version works fine.
> It would be nice to get the newer version to work, because in
> principle this type of syntax should make it much easier for me to
> create my own functions in future instead of bothering the list so
> often.

It's just a particular kind of event function created from markup, so it
does not make for a lot of uses avoiding an actual Scheme-style
definition, and they aren't really that hard to do.

In a way, it is funny how far a limited redundant shortcut \etc will
carry both in the use cases actually covered by it as well as in user

One reason for the former may be that many music/scheme/event functions
have been intentionally organized in a manner where the most important
argument is last in order to facilitate "chaining" them without trailing
arguments stacking up.  And that argument order is what \etc can work

David Kastrup

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