From: Mark Wooding <mdw@distorted.org.uk>
Date: Sun, 30 Aug 2015 09:58:38 +0000 (+0100)
Subject: lib/sod.h, test/chimaera.sod: Promote `SOD_DECL' to the library header.
X-Git-Tag: 0.2.0~37
X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~mdw/git/sod/commitdiff_plain/267dd3e78997ba6f5a0801c0afab2148dd049f16

lib/sod.h, test/chimaera.sod: Promote `SOD_DECL' to the library header.

It seems generally useful.
---

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@ --- *
diff --git a/test/chimaera.sod b/test/chimaera.sod
index d748bb5..cc72a47 100644
--- a/test/chimaera.sod
+++ b/test/chimaera.sod
@@ -77,10 +77,6 @@ static void provoke_serpent(Serpent *s)
   s->_vt->serpent.bite(s);
 }
 
-#define SOD_DECL(cls_, var_)						\
-  struct cls_##__ilayout var_##__layout;				\
-  cls_ *var_ = cls_##__class->cls.init(&var_##__layout)
-
 int main(void)
 {
   {