Remove operator overload

Signed-off-by: Nahuel Espinosa <nespinosa@ekumenlabs.com>

beluga/include/beluga/actions/assign.hpp

@@ -93,30 +93,6 @@ struct assign_fn {
  */
 inline constexpr detail::assign_fn assign;
 
-/// Operator overload that appends assign to any range closure.
-template <
-    class Range,
-    class Fn,
-    std::enable_if_t<ranges::range<Range>, int> = 0,
-    std::enable_if_t<is_range_closure_v<Fn>, int> = 0>
-constexpr auto operator<<=(Range& range, Fn fn) -> Range& {
-  return range |= std::move(fn) | beluga::actions::assign;
-}
-
 }  // namespace beluga::actions
 
-// Make the assign operator overload findable by ADL for existing range adaptor objects:
-
-namespace beluga::views {
-using beluga::actions::operator<<=;
-}
-
-namespace ranges::views {
-using beluga::actions::operator<<=;
-}
-
-namespace ranges::actions {
-using beluga::actions::operator<<=;
-}
-
 #endif

beluga/test/beluga/actions/test_assign.cpp

@@ -59,12 +59,6 @@ TEST(AssignAction, ViewToActionCall) {
   ASSERT_TRUE(ranges::equal(input, std::vector{3, 2, 1}));
 }
 
-TEST(AssignAction, ViewToActionOperator) {
-  auto input = std::vector{1, 2, 3};
-  input <<= ranges::views::reverse;
-  ASSERT_TRUE(ranges::equal(input, std::vector{3, 2, 1}));
-}
-
 TEST(AssignAction, ActionComposition) {
   auto input = std::vector{1, 2, 3};
   input |= ranges::actions::drop(1) | beluga::actions::assign;
@@ -90,7 +84,7 @@ TEST(AssignAction, ActionViewActionComposition) {
 
 TEST(AssignAction, List) {
   auto input = std::list{1, 2, 3};
-  input <<= ranges::actions::remove(2) | ranges::views::reverse;
+  input |= ranges::actions::remove(2) | ranges::views::reverse | beluga::actions::assign;
   ASSERT_TRUE(ranges::equal(input, std::list{3, 1}));
 }