common/hobject: make hobject_t formatter methods const

Signed-off-by: Samuel Just <sjust@redhat.com>

diff --git a/src/common/hobject.h b/src/common/hobject.h
index 9c03613c90e8b4314674251ac858f7919da95bb0..2a2c82a445fcf4604588d6823ab5fa26550fb5d0 100644 (file)
--- a/src/common/hobject.h
+++ b/src/common/hobject.h
@@ -398,10 +398,10 @@ struct formatter<hobject_t> {
     return ctx.out();
   }
 
-  constexpr auto parse(format_parse_context& ctx) { return ctx.begin(); }
+  constexpr auto parse(format_parse_context& ctx) const { return ctx.begin(); }
 
   template <typename FormatContext>
-  auto format(const hobject_t& ho, FormatContext& ctx)
+  auto format(const hobject_t& ho, FormatContext& ctx) const
   {
     if (ho == hobject_t{}) {
       return fmt::format_to(ctx.out(), "MIN");