From 1ec92395c0ac0f8aa26cf4e2472ef21d9c620b32 Mon Sep 17 00:00:00 2001
From: David Kastrup <dak@gnu.org>
Date: Sat, 21 Jul 2012 12:33:03 +0200
Subject: [PATCH] Issue 2688: Add ly:context-mod-apply! function.

---
 lily/context-mod-scheme.cc | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/lily/context-mod-scheme.cc b/lily/context-mod-scheme.cc
index ce6d149dbb..9c79c37859 100644
--- a/lily/context-mod-scheme.cc
+++ b/lily/context-mod-scheme.cc
@@ -55,3 +55,16 @@ LY_DEFINE (ly_make_context_mod, "ly:make-context-mod",
   else
     return Context_mod ().smobbed_copy ();
 }
+
+LY_DEFINE (ly_context_mod_apply_x, "ly:context-mod-apply!",
+	   2, 0, 0, (SCM context, SCM mod),
+	   "Apply the context modification @var{mod} to @var{context}.")
+{
+  LY_ASSERT_SMOB (Context, context, 1);
+  LY_ASSERT_SMOB (Context_mod, mod, 2);
+
+  apply_property_operations (unsmob_context (context),
+			     unsmob_context_mod (mod)->get_mods ());
+  scm_remember_upto_here_1 (context);
+  return SCM_UNSPECIFIED;
+}
-- 
2.39.2