[PATCH 05/16] Let \accidentalStyle detect its optional context argument by looking at its letter case

[David Kastrup]

This is a fishy stopgap measure to let \accidentalStyle able to
distinguish #'Voice "default" from "default" alone while we generate
symbols from from #'Voice as well as "default".  If the first letter
is uppercase, the symbol is considered to be a context specification.
---
 ly/property-init.ly |    8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/ly/property-init.ly b/ly/property-init.ly
index e36c3c0..caf6ad0 100644
--- a/ly/property-init.ly
+++ b/ly/property-init.ly
@@ -13,10 +13,16 @@ defaultNoteHeads =
    (_i "Revert to the default note head style.")
    (revert-head-style '(NoteHead TabNoteHead)))
 
+#(define (context-name? c)
+  "A stopgap measure until dotted lists become available as arguments.
+Distinguish context names from accidental styles by virtue of their
+first letter being uppercase."
+  (and (symbol? c)
+   (char-upper-case? (string-ref (symbol->string c) 0))))
 
 accidentalStyle =
 #(define-music-function
-   (parser location context style) ((symbol?) string?)
+   (parser location context style) ((context-name?) string?)
    (_i "Set accidental style to @var{style}, a string.  If an optional
 @var{context} symbol is given, e.g. @code{#'Staff} or @code{#'Voice},
 the settings are applied to that context.  Otherwise, the context
-- 
1.7.9.5