Forward declare is_string<FILE*> specializations

fmtlib · Mar 19, 2019 · 6d416cf · 6d416cf
1 parent b742f62
commit 6d416cf
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/include/fmt/core.h b/include/fmt/core.h
@@ -618,6 +618,10 @@ struct is_string
                               decltype(to_string_view(declval<S>()))>::value> {
 };
 
+// Forward declare FILE* specialization defined in color.h
+template <> struct is_string<std::FILE*>;
+template <> struct is_string<const std::FILE*>;
+
 template <typename S> struct char_t {
   typedef decltype(to_string_view(declval<S>())) result;
   typedef typename result::char_type type;