Re: Function operating on header

[Timothy Lanfear]

On 07/03/2020 12:19, Noeck wrote:
> Hi,
>
> I would like to populate header fields based on other header fields
> (copyright based on author is just an example):
>
> \version "2.20.0"
>
> \header {
>    author = "Name"
> }
>
> % call a function here equivalent to writng
> \header {
>    copyright = #(string-append "© " "Name")
>    % where "Name" is the author field from above
> }
>
> { a }
>
> Is that possible?
>
> Cheers,
> Joram
Does this solve your problem?

\version "2.20.0"

\header {
  author = "Name"
  copyright = \markup \concat { "© " \fromproperty #'header:author }
}

\score {
  c''1
}


--
Timothy Lanfear, Bristol, UK.