From 67c9315c53a926d88679017fe8651db903b4fcb9 Mon Sep 17 00:00:00 2001
From: David Kastrup <dak@gnu.org>
Date: Sun, 21 Sep 2014 18:43:39 +0200
Subject: [PATCH] Issue 4124: Move make-engraver macro to output-lib.scm

GUILEv2 is a bit picky about macros being defined before use, so we need
to define this one early.
---
 scm/output-lib.scm            | 36 +++++++++++++++++++++++++++++++++++
 scm/translation-functions.scm | 36 -----------------------------------
 2 files changed, 36 insertions(+), 36 deletions(-)

diff --git a/scm/output-lib.scm b/scm/output-lib.scm
index fcd91c36d5..59f93e2e7e 100644
--- a/scm/output-lib.scm
+++ b/scm/output-lib.scm
@@ -1358,3 +1358,39 @@ parent or the parent has no setting."
               (larger (max (car edge-height) (cdr edge-height))))
           (interval-union '(0 . 0) (cons smaller larger)))
         '(0 . 0))))
+
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;; make-engraver helper macro
+
+(defmacro-public make-engraver forms
+  "Helper macro for creating Scheme engravers.
+
+The usual form for an engraver is an association list (or alist)
+mapping symbols to either anonymous functions or to another such
+alist.
+
+@code{make-engraver} accepts forms where the first element is either
+an argument list starting with the respective symbol, followed by the
+function body (comparable to the way @code{define} is used for
+defining functions), or a single symbol followed by subordinate forms
+in the same manner.  You can also just make an alist pair
+literally (the @samp{car} is quoted automatically) as long as the
+unevaluated @samp{cdr} is not a pair.  This is useful if you already
+have defined your engraver functions separately.
+
+Symbols mapping to a function would be @code{initialize},
+@code{start-translation-timestep}, @code{process-music},
+@code{process-acknowledged}, @code{stop-translation-timestep}, and
+@code{finalize}.  Symbols mapping to another alist specified in the
+same manner are @code{listeners} with the subordinate symbols being
+event classes, and @code{acknowledgers} and @code{end-acknowledgers}
+with the subordinate symbols being interfaces."
+  (let loop ((forms forms))
+    (if (or (null? forms) (pair? forms))
+        `(list
+          ,@(map (lambda (form)
+                   (if (pair? (car form))
+                       `(cons ',(caar form) (lambda ,(cdar form) ,@(cdr form)))
+                       `(cons ',(car form) ,(loop (cdr form)))))
+                 forms))
+        forms)))
diff --git a/scm/translation-functions.scm b/scm/translation-functions.scm
index 3e65016edb..dc8eef609b 100644
--- a/scm/translation-functions.scm
+++ b/scm/translation-functions.scm
@@ -697,39 +697,3 @@ only ~a fret labels provided")
 (export every-nth-repeat-count-visible)
 
 (define-public (all-repeat-counts-visible count context) #t)
-
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-;; make-engraver helper macro
-
-(defmacro-public make-engraver forms
-  "Helper macro for creating Scheme engravers.
-
-The usual form for an engraver is an association list (or alist)
-mapping symbols to either anonymous functions or to another such
-alist.
-
-@code{make-engraver} accepts forms where the first element is either
-an argument list starting with the respective symbol, followed by the
-function body (comparable to the way @code{define} is used for
-defining functions), or a single symbol followed by subordinate forms
-in the same manner.  You can also just make an alist pair
-literally (the @samp{car} is quoted automatically) as long as the
-unevaluated @samp{cdr} is not a pair.  This is useful if you already
-have defined your engraver functions separately.
-
-Symbols mapping to a function would be @code{initialize},
-@code{start-translation-timestep}, @code{process-music},
-@code{process-acknowledged}, @code{stop-translation-timestep}, and
-@code{finalize}.  Symbols mapping to another alist specified in the
-same manner are @code{listeners} with the subordinate symbols being
-event classes, and @code{acknowledgers} and @code{end-acknowledgers}
-with the subordinate symbols being interfaces."
-  (let loop ((forms forms))
-    (if (cheap-list? forms)
-        `(list
-          ,@(map (lambda (form)
-                   (if (pair? (car form))
-                       `(cons ',(caar form) (lambda ,(cdar form) ,@(cdr form)))
-                       `(cons ',(car form) ,(loop (cdr form)))))
-                 forms))
-        forms)))
-- 
2.39.5