X-Git-Url: https://git.ozlabs.org/?a=blobdiff_plain;f=ccan%2Fcppmagic%2Fcppmagic.h;fp=ccan%2Fcppmagic%2Fcppmagic.h;h=f29e0ec6cee39b39114f3849dadce50d00a2f6e3;hb=ff71198b4e75fcaaedad34a4e362a3982a936e3e;hp=0000000000000000000000000000000000000000;hpb=c43be6b888aa75d2a8d7fcc878534a9cad04176b;p=ccan

diff --git a/ccan/cppmagic/cppmagic.h b/ccan/cppmagic/cppmagic.h
new file mode 100644
index 00000000..f29e0ec6
--- /dev/null
+++ b/ccan/cppmagic/cppmagic.h
@@ -0,0 +1,42 @@
+/* MIT (BSD) license - see LICENSE file for details */
+#ifndef CCAN_CPPMAGIC_H
+#define CCAN_CPPMAGIC_H
+
+/**
+ * CPPMAGIC_NOTHING - expands to nothing
+ */
+#define CPPMAGIC_NOTHING()
+
+/**
+ * CPPMAGIC_STRINGIFY - convert arguments to a string literal
+ */
+#define _CPPMAGIC_STRINGIFY(...)	#__VA_ARGS__
+#define CPPMAGIC_STRINGIFY(...)		_CPPMAGIC_STRINGIFY(__VA_ARGS__)
+
+/**
+ * CPPMAGIC_GLUE2 - glue arguments together
+ *
+ * CPPMAGIC_GLUE2(@a_, @b_)
+ *	expands to the expansion of @a_ followed immediately
+ *	(combining tokens) by the expansion of @b_
+ */
+#define _CPPMAGIC_GLUE2(a_, b_)		a_##b_
+#define CPPMAGIC_GLUE2(a_, b_)		_CPPMAGIC_GLUE2(a_, b_)
+
+/**
+ * CPPMAGIC_1ST - return 1st argument
+ *
+ * CPPMAGIC_1ST(@a_, ...)
+ *	expands to the expansion of @a_
+ */
+#define CPPMAGIC_1ST(a_, ...)		a_
+
+/**
+ * CPPMAGIC_2ND - return 2nd argument
+ *
+ * CPPMAGIC_2ST(@a_, @b_, ...)
+ *	expands to the expansion of @b_
+ */
+#define CPPMAGIC_2ND(a_, b_, ...)	b_
+
+#endif /* CCAN_CPPMAGIC_H */