+/* Outputs error message in CLASS, with text FORMAT, formatted with printf.
+ LOCATION is the reported location for the message. */
+void
+msg_at (enum msg_class class, const struct msg_location *location,
+ const char *format, ...)
+{
+ va_list args;
+ va_start (args, format);
+ vmsg (class, location, format, args);
+ va_end (args);
+}