X-Git-Url: https://git.ozlabs.org/?p=ccan;a=blobdiff_plain;f=ccan%2Fstr%2Fstr.h;h=70fe26c74fad3905b3acf2efd8ac0b792ba766a5;hp=f633bc757e1c15655b7a06cfcd21a08922bb4e2a;hb=90e94990efbd7fb280f5ff30d2da4401d7ce27fc;hpb=56cfebd643ca686a480e9395100ad2ad2eaf93fb

diff --git a/ccan/str/str.h b/ccan/str/str.h
index f633bc75..70fe26c7 100644
--- a/ccan/str/str.h
+++ b/ccan/str/str.h
@@ -43,4 +43,16 @@ static inline bool strends(const char *str, const char *postfix)
 
 	return streq(str + strlen(str) - strlen(postfix), postfix);
 }
+
+/**
+ * stringify - Turn expression into a string literal
+ * @expr: any C expression
+ *
+ * Example:
+ *	#define PRINT_COND_IF_FALSE(cond) \
+ *		((cond) || printf("%s is false!", stringify(cond)))
+ */
+#define stringify(expr)		stringify_1(expr)
+/* Double-indirection required to stringify expansions */
+#define stringify_1(expr)	#expr
 #endif /* CCAN_STR_H */