From 5dd012a8e3d886ae6e076fa4bcda4d2c78148e23 Mon Sep 17 00:00:00 2001
From: Giulio Eulisse <10544+ktf@users.noreply.github.com>
Date: Thu, 14 Aug 2025 14:12:53 +0200
Subject: [PATCH] DPL: add more views on InputSpecs / OutputSpecs /
 DataProcessors

Useful to reduce the amount of lines of code in various manipulation
parts.
---
 .../Core/include/Framework/DataSpecViews.h    | 44 ++++++++++++++++++-
 1 file changed, 43 insertions(+), 1 deletion(-)

diff --git a/Framework/Core/include/Framework/DataSpecViews.h b/Framework/Core/include/Framework/DataSpecViews.h
index 010d771b07941..0782cefd0f632 100644
--- a/Framework/Core/include/Framework/DataSpecViews.h
+++ b/Framework/Core/include/Framework/DataSpecViews.h
@@ -18,8 +18,50 @@ namespace o2::framework::views
 {
 static auto partial_match_filter(auto what)
 {
-  return std::views::filter([&what](auto const& t) -> bool { return DataSpecUtils::partialMatch(t, what); });
+  return std::views::filter([what](auto const& t) -> bool { return DataSpecUtils::partialMatch(t, what); });
 }
+
+static auto exclude_by_name(std::string name)
+{
+  return std::views::filter([name](auto const& t) -> bool { return t.name != name; });
+}
+
+static auto filter_not_matching(auto const& provided)
+{
+  return std::views::filter([&provided](auto const& input) { return std::none_of(provided.begin(), provided.end(), [&input](auto const& output) { return DataSpecUtils::match(input, output); }); });
+}
+
 } // namespace o2::framework::views
+//
+namespace o2::framework::sinks
+{
+template <class Container>
+struct append_to {
+  Container& c;
+  // ends the pipeline, returns the container
+  template <std::ranges::input_range R>
+  friend Container& operator|(R&& r, append_to self)
+  {
+    std::ranges::copy(r, std::back_inserter(self.c));
+    return self.c;
+  }
+};
+
+template <class Container>
+struct update_input_list {
+  Container& c;
+  // ends the pipeline, returns the container
+  template <std::ranges::input_range R>
+  friend Container& operator|(R&& r, update_input_list self)
+  {
+    for (auto& item : r) {
+      auto copy = item;
+      DataSpecUtils::updateInputList(self.c, std::move(copy));
+    }
+    return self.c;
+  }
+};
+
+} // namespace o2::framework::sinks
 
 #endif // O2_FRAMEWORK_DATASPECVIEWS_H_