X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=scm%2Fc%2B%2B.scm;h=bccd15ed02b0be8e29fa01f3da2237f6f1720bc9;hb=553f6aa21a21d0ba7ae3ee48bce121154590bf8b;hp=ee4de99005758b11de20e9de53a1e0cdb0349a83;hpb=0387f04497978e37b335a8b99eec905499d6ad0f;p=lilypond.git

diff --git a/scm/c++.scm b/scm/c++.scm
index ee4de99005..bccd15ed02 100644
--- a/scm/c++.scm
+++ b/scm/c++.scm
@@ -1,8 +1,8 @@
 ;;;; c++.scm -- implement Scheme frontends to C++ functions
 ;;;;
 ;;;;  source file of the GNU LilyPond music typesetter
-;;;; 
-;;;; (c) 1998--2008 Jan Nieuwenhuizen <janneke@gnu.org>
+;;;;
+;;;; (c) 1998--2009 Jan Nieuwenhuizen <janneke@gnu.org>
 ;;;;                 Han-Wen Nienhuys <hanwen@xs4all.nl>
 
 ;;; Note: this file can't be used without LilyPond executable
@@ -33,12 +33,21 @@
 (define-public (number-or-string? x)
   (or (number? x) (string? x)))
 
+(define-public (string-or-pair? x)
+  (or (string? x) (pair? x)))
+
+(define-public (cheap-list? x)
+  (or (pair? x) (null? x)))
+
+(define-public (list-or-symbol? x)
+  (or (cheap-list? x) (symbol? x)))
+
 (define-public (scheme? x) #t)
 
 
 ;; moved list to end of lily.scm: then all type-predicates are
 ;; defined.
-(define type-p-name-alist '()) 
+(define type-p-name-alist '())
 
 (define (match-predicate obj alist)
   (if (null? alist)
@@ -54,6 +63,4 @@
   (type-name (match-predicate obj type-p-name-alist)))
 
 (define-public (type-name predicate)
-  (let ((entry (assoc predicate type-p-name-alist)))
-    (if (pair? entry) (cdr entry)
-	"unknown")))
+  (assoc-get predicate type-p-name-alist "unknown"))