On 6/9/10 7:34 AM, "James Lowe" <james.l...@datacore.com> wrote:
> Hello,
>
> Going on from the 'curly quotes' problem that was resolved a couple of
> days back in our documentation, I noticed in the NR while scanning
> through another 'odd' single quote mark after the hash (#) character.
>
> \override #`(direction . ,UP)
This has UP evaluated at the time the cons cell is made.
>
> instead of
>
> \override #'(direction . ,UP)
This is incorrect. The alternative syntax would be
\override #'(direction . UP)
which would put the symbol UP in the cons cell.
>
> See attached screenshot for an example
>
> An example is from the the NR Appendix, 'A.8.2 Align'
>
> http://lilypond.org/doc/v2.13///Documentation/notation/align
>
> specifically '\dir-column args (markup list)'
>
> I wondered if anyone can tell me if this is a mistake or what the
> significance of the back-quote is vs the standard singe quote?
The back-quote means that any expression in the back-quoted list that is
preceded by a comma will be evaluated. The regular single quote means that
nothing in the list will be evaluated; the list will just be assembled.
HTH,
Carl
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