do sanity check on input iterators to ensure that the input range is …

…not empty
sewenew · Oct 22, 2019 · 3ba84a8 · 3ba84a8
1 parent d8c0c64
commit 3ba84a8
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diff --git a/src/sw/redis++/errors.h b/src/sw/redis++/errors.h
@@ -152,6 +152,13 @@ void throw_error(redisContext &context, const std::string &err_info);
 
 void throw_error(const redisReply &reply);
 
+template <typename Input>
+inline void range_check(const char *cmd, Input first, Input last) {
+    if (first == last) {
+        throw Error(std::string(cmd) + ": no key specified");
+    }
+}
+
 }
 
 }