Re: Problem compiling: music-functions-init.ly

[David Kastrup]

Davide Liessi <address@hidden> writes:

> Il giorno mer 14 nov 2018 alle ore 08:25 Keizen Li Qian
> <address@hidden> ha scritto:
>> Parsing.../usr/share/lilypond/2.18.2/ly/music-functions-init.ly:564:11:
>> In procedure ly:music-transpose in expression (ly:music-transpose
>> (make-music # # ...) tonic):
>> /usr/share/lilypond/2.18.2/ly/music-functions-init.ly:564:11: Wrong
>> type (expecting pair): major
>
> You probably wrote
> \key c major
> instead of
> \key c \major

Well spotted.  The embarrassing thing is that we even get there: this
is something that should rather be caught earlier.  We have

key =
#(define-music-function (tonic pitch-alist)
   ((ly:pitch? '()) (list? '()))
[...]

and the word major qualifies as list? by getting converted to '(major)
which is a symbol list like needed for some override/tweak
specifications.

So it very much looks like we should use a more specific predicate than
list? for the scale type in order to not have that user error pass down
in this manner.

Suggestions?

-- 
David Kastrup