ext/attribute_builder/attribute_builder.c in faml-0.3.3 vs ext/attribute_builder/attribute_builder.c in faml-0.3.4

@@ -8,10 +8,12 @@
 #else
 # define RARRAY_AREF(a, i) RARRAY_PTR(a)[i]
 # define rb_ary_new_capa rb_ary_new2
 #endif
 
+#define FOREACH_FUNC(func) ((int (*)(ANYARGS))(func))
+
 VALUE rb_mAttributeBuilder;
 static ID id_keys, id_sort_bang, id_uniq_bang, id_merge_bang;
 static ID id_id, id_class, id_underscore, id_hyphen, id_space, id_equal;
 
 static void
@@ -41,11 +43,11 @@
 
 static VALUE
 stringify_keys(VALUE hash)
 {
   VALUE h = rb_hash_new();
-  rb_hash_foreach(hash, stringify_keys_i, h);
+  rb_hash_foreach(hash, FOREACH_FUNC(stringify_keys_i), h);
   return h;
 }
 
 struct normalize_data_i2_arg {
   VALUE key, normalized;
@@ -99,11 +101,11 @@
 
   if (RB_TYPE_P(value, T_HASH)) {
     struct normalize_data_i2_arg arg;
     arg.key = key;
     arg.normalized = normalized;
-    rb_hash_foreach(normalize_data(value), normalize_data_i2, (VALUE)(&arg));
+    rb_hash_foreach(normalize_data(value), FOREACH_FUNC(normalize_data_i2), (VALUE)(&arg));
   } else if (RB_TYPE_P(value, T_TRUE)) {
     /* Keep Qtrue value */
     rb_hash_aset(normalized, key, value);
   } else if (RB_TYPE_P(value, T_FALSE) || NIL_P(value)) {
     /* Delete falsey values */
@@ -118,11 +120,11 @@
 {
   VALUE normalized;
 
   Check_Type(data, T_HASH);
   normalized = rb_hash_new();
-  rb_hash_foreach(data, normalize_data_i, normalized);
+  rb_hash_foreach(data, FOREACH_FUNC(normalize_data_i), normalized);
   return normalized;
 }
 
 static int
 put_data_attribute(VALUE key, VALUE val, VALUE hash)
@@ -149,10 +151,10 @@
     if (RB_TYPE_P(value, T_HASH) && RSTRING_LEN(key) == 4 && memcmp(RSTRING_PTR(key), "data", 4) == 0) {
       VALUE data;
 
       rb_hash_delete(hash, key);
       data = normalize_data(value);
-      rb_hash_foreach(data, put_data_attribute, hash);
+      rb_hash_foreach(data, FOREACH_FUNC(put_data_attribute), hash);
     } else if (RB_TYPE_P(value, T_TRUE)) {
       /* Keep Qtrue value */
     } else if (RB_TYPE_P(value, T_FALSE) || NIL_P(value)) {
       rb_hash_delete(hash, key);
     } else {