From 62c1304ddb466c627e4292b615ce1ca69a8797d8 Mon Sep 17 00:00:00 2001
From: sha512sum <linuxnyasha@tutanota.com>
Date: Tue, 19 Mar 2024 15:14:27 +0000
Subject: [PATCH] Add find to TupleLike

---
 include/utempl/utils.hpp | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/include/utempl/utils.hpp b/include/utempl/utils.hpp
index 7e6b2cb..a85134d 100644
--- a/include/utempl/utils.hpp
+++ b/include/utempl/utils.hpp
@@ -291,6 +291,19 @@ inline constexpr auto Curry(F&& f) -> Curryer<std::remove_cvref_t<F>> {
   return {.f = std::forward<F>(f), .data = Tuple{}};
 };
 
-
+template <TupleLike Tuple, typename T>
+inline constexpr auto Find(Tuple&& tuple, T&& find) -> std::size_t {
+  return [&]<std::size_t... Is>(std::index_sequence<Is...>) -> std::size_t {
+    std::array<bool, kTupleSize<Tuple>> bs{Overloaded(
+      [&](const T& element){
+        return element == find;
+      },
+      [](auto&&) {
+        return false;
+      }
+    )(Get<Is>(tuple))...};
+    return std::ranges::find(bs, true) - bs.begin();
+  }(std::make_index_sequence<kTupleSize<Tuple>>());
+};
 
 } // namespace utempl