Merge branch 'master' of git://git.savannah.gnu.org/lilypond.git

[lilypond.git] / scm / documentation-lib.scm

diff --git a/scm/documentation-lib.scm b/scm/documentation-lib.scm
index a97f0c2f76f44b8362118afebc1ac1ceb443f696..af48e55c6b51a32b40a1f1e223e5ef1daf62e2fb 100644 (file)
--- a/scm/documentation-lib.scm
+++ b/scm/documentation-lib.scm
@@ -1,10 +1,20 @@
+;;;; This file is part of LilyPond, the GNU music typesetter.
 ;;;;
-;;;; documentation-lib.scm -- Assorted Functions for generated documentation
+;;;; Copyright (C) 2000--2011 Han-Wen Nienhuys <hanwen@xs4all.nl>
+;;;;                 Jan Nieuwenhuizen <janneke@gnu.org>
 ;;;;
-;;;; source file of the GNU LilyPond music typesetter
+;;;; LilyPond is free software: you can redistribute it and/or modify
+;;;; it under the terms of the GNU General Public License as published by
+;;;; the Free Software Foundation, either version 3 of the License, or
+;;;; (at your option) any later version.
 ;;;;
-;;;; (c) 2000--2009 Han-Wen Nienhuys <hanwen@xs4all.nl>
-;;;;                 Jan Nieuwenhuizen <janneke@gnu.org>
+;;;; LilyPond is distributed in the hope that it will be useful,
+;;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;;;; GNU General Public License for more details.
+;;;;
+;;;; You should have received a copy of the GNU General Public License
+;;;; along with LilyPond.  If not, see <http://www.gnu.org/licenses/>.
 
 (use-modules (oop goops)
             (srfi srfi-13)
@@ -149,7 +159,7 @@ string-to-use).  If QUOTE? is #t, embed table in a @quotation environment."
   name)
 
 (define (ref-ify x)
-  "Return @ref{X}. If mapping ref-ify to a list that needs to be sorted,
+  "Return @ref{X}.  If mapping ref-ify to a list that needs to be sorted,
    sort the list first."
   (string-append "@ref{" x "}"))
 
@@ -169,6 +179,13 @@ string-to-use).  If QUOTE? is #t, embed table in a @quotation environment."
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 ;; property  stuff.
 
+(define (verify-type-name where sym type)
+  (if (eq? type #f)
+      (ly:error (_ "cannot find description for property `~S' (~S)")
+                sym
+                where))
+  (type-name type))
+
 (define (property->texi where sym . rest)
   "Document SYM for WHERE (which can be translation, backend, music),
 with init values from ALIST (1st optional argument)
@@ -180,7 +197,7 @@ with init values from ALIST (1st optional argument)
         (doc-name (string->symbol
                    (string-append (symbol->string where) "-doc")))
         (type (object-property sym type?-name))
-        (typename (type-name type))
+        (typename (verify-type-name where sym type))
         (desc (object-property sym doc-name))
         (init-value (assoc-get sym alist)))