Re: Convert Scheme symbol to pitch

[caagr98]

On 03/02/17 23:39, David Kastrup wrote:
> address@hidden writes:
>
> > Is it possible to convert a symbol (such as `'bes'`) to a pitch (in
> > this case `(ly:make-pitch 1 0 0)`)? I know you can do `#{ bes' #}` to
> > get a pitch, but that only appears to work for constants.
> >
> > Or, for a more general question: is there some way to eval() a string
> > as Lilypond code?
>
> In newer 2.19 versions
>
> (ly:parse-string-expression (ly:parser-clone) "bes'")
>
> In older versions, ly:parser-clone may need an argument and in most
> user-level uses just writing  parser  will likely work as such an
> argument.

That seems to work perfectly. I'll have to add a `ly:pitch?` to ensure 
the input is valid, but that's beside the point.