update codes...but can't compile

inc/hgl/graph/mtl/ShaderBuffer.h

@@ -0,0 +1,18 @@
+#ifndef HGL_GRAPH_MTL_SHADER_BUFFER_INCLUDE
+#define HGL_GRAPH_MTL_SHADER_BUFFER_INCLUDE
+
+#include<hgl/type/DataType.h>
+
+namespace hgl
+{
+    namespace graph
+    {
+        struct ShaderBufferSource
+        {
+            const char *struct_name;
+            const char *value_name;
+            const char *codes;
+        };
+    }//namespace graph
+}//namespace hgl
+#endif//HGL_GRAPH_MTL_SHADER_BUFFER_INCLUDE