Implement ly:make-context-mod

diff --git a/lily/context-mod-scheme.cc b/lily/context-mod-scheme.cc
index b993a7de8f33e6e728b713ae49dbf974828513df..4b3467eb20eeca15a4b3a721e94ed6a229508ed0 100644 (file)
--- a/lily/context-mod-scheme.cc
+++ b/lily/context-mod-scheme.cc
@@ -21,8 +21,7 @@
 #include "context.hh"
 #include "context-mod.hh"
 
-LY_DEFINE (ly_get_context_mods,
-           "ly:get-context-mods",
+LY_DEFINE (ly_get_context_mods, "ly:get-context-mods",
            1, 0, 0, (SCM contextmod),
            "Returns the list of context modifications stored in"
            " @var{contextmod}.")
@@ -32,8 +31,7 @@ LY_DEFINE (ly_get_context_mods,
   return tr->get_mods ();
 }
 
-LY_DEFINE (ly_add_context_mod,
-           "ly:add-context-mod",
+LY_DEFINE (ly_add_context_mod, "ly:add-context-mod",
            2, 0, 0, (SCM contextmods, SCM modification),
            "Adds the given context @var{modification} to the list"
            " @var{contextmods} of context modifications.")
@@ -44,3 +42,16 @@ LY_DEFINE (ly_add_context_mod,
   return SCM_UNSPECIFIED;
 }
 
+LY_DEFINE (ly_make_context_mod, "ly:make-context-mod",
+           0, 1, 0, (SCM mod_list),
+           "Creates a context modification, optionally initialized"
+           " via the list of modifications @var{mod-list}.")
+{
+  if (mod_list != SCM_UNDEFINED)
+    {
+      LY_ASSERT_TYPE (ly_cheap_is_list, mod_list, 1);
+      return Context_mod (mod_list).smobbed_copy ();
+    }
+  else
+    return Context_mod ().smobbed_copy ();
+}

diff --git a/lily/context-mod.cc b/lily/context-mod.cc
index 5fccf6c4d2985f5e865a33fb96f1f5a3d9300192..2cfd31381e98c36d5f2fbfa22b8ee6153b525f0e 100644 (file)
--- a/lily/context-mod.cc
+++ b/lily/context-mod.cc
@@ -29,6 +29,11 @@ Context_mod::Context_mod (Context_mod const &s)
   mods_ = s.mods_;
 }
 
+Context_mod::Context_mod (SCM mod_list)
+{
+  mods_ = mod_list;
+}
+
 #include "ly-smobs.icc"
 IMPLEMENT_SIMPLE_SMOBS (Context_mod);
 IMPLEMENT_DEFAULT_EQUAL_P (Context_mod);

diff --git a/lily/include/context-mod.hh b/lily/include/context-mod.hh
index 36c8885bbcf5cb5dc267e18565f676b5eed66674..ed31be492d76c518feecc9176f9f9c31786e25cb 100644 (file)
--- a/lily/include/context-mod.hh
+++ b/lily/include/context-mod.hh
@@ -48,6 +48,7 @@ public:
 
   Context_mod ();
   Context_mod (Context_mod const &);
+  Context_mod (SCM mod_list);
   DECLARE_SIMPLE_SMOBS (Context_mod);
 };