X-Git-Url: https://git.distorted.org.uk/~mdw/sod/blobdiff_plain/430fd33a4f9b29fb5051580878c48e991e5f3d43..267dd3e78997ba6f5a0801c0afab2148dd049f16:/lib/sod.h

diff --git a/lib/sod.h b/lib/sod.h
index 594e343..919b927 100644
--- a/lib/sod.h
+++ b/lib/sod.h
@@ -168,6 +168,19 @@ struct sod_chain {
 
 #define SOD_CONVERT(cls, obj) ((cls *)sod_convert(cls##__class, (obj)))
 
+/* --- @SOD_DECL@ --- *
+ *
+ * Arguments:	@cls_@ = a class type name
+ *		@var_@ = a variable name
+ *
+ * Use:		Declare @var_@ as a pointer to an initialized instance of
+ *		@cls_@ with automatic lifetime.
+ */
+
+#define SOD_DECL(cls_, var_)						\
+  struct cls_##__ilayout var_##__layout;				\
+  cls_ *var_ = cls_##__class->cls.init(&var_##__layout)
+
 /*----- Functions provided ------------------------------------------------*/
 
 /* --- @sod_subclassp@ --- *