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Re: What is the point of \on-the-fly ?

From: Paul
Subject: Re: What is the point of \on-the-fly ?
Date: Tue, 13 Jun 2017 10:31:40 -0400
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.1.1

On 06/12/2017 01:00 AM, David Kastrup wrote:

The use case is similar to that of lambda: creating a procedure on the
fly without giving it a name.

Ah, got it. Then makes sense to avoid having to use on-the-fly, by converting those named on-the-fly procedures into actual markup commands.

Just thinking out loud, but if define-markup-command worked like define-music-function and friends (i.e. like lambda) so that they returned a procedure, like this:

  command-name = #(define-markup-command (layout props args...) ...

  (define command-name (define-markup-command (layout props args...) ...

Rather than the current form:

  (define-markup-command (command-name layout props args...) ...

Would that remove the need for on-the-fly or am I missing something? I'm sure that would not be a trivial change -- again just thinking out loud.


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