1 files changed, 26 insertions, 0 deletions
diff --git a/src/EventAccessors.h b/src/EventAccessors.h
index ced159c1..a58c7de0 100644
--- a/src/EventAccessors.h
+++ b/src/EventAccessors.h
@@ -11,6 +11,32 @@
#include <mtx/events/collections.hpp>
+namespace nheko {
+struct nonesuch
+{
+ ~nonesuch() = delete;
+ nonesuch(nonesuch const &) = delete;
+ void operator=(nonesuch const &) = delete;
+};
+
+namespace detail {
+template<class Default, class AlwaysVoid, template<class...> class Op, class... Args>
+struct detector
+{
+ using value_t = std::false_type;
+ using type = Default;
+};
+
+template<class Default, template<class...> class Op, class... Args>
+struct detector<Default, std::void_t<Op<Args...>>, Op, Args...>
+{
+ using value_t = std::true_type;
+ using type = Op<Args...>;
+};
+
+} // namespace detail
+}
+
namespace mtx::accessors {
std::string
event_id(const mtx::events::collections::TimelineEvents &event);
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