fix gcc harder

Author: ericniebler

include/exec/sequence/any_sequence_of.hpp

@@ -63,8 +63,8 @@ namespace experimental::execution
 
         virtual constexpr auto set_next(_item_sender _sndr) -> _void_sender
         {
-          return exec::set_next(STDEXEC::__any::__value(*this),
-                                static_cast<_item_sender &&>(_sndr));
+          return execution::set_next(STDEXEC::__any::__value(*this),
+                                     static_cast<_item_sender &&>(_sndr));
         }
       };
     };
@@ -92,7 +92,7 @@ namespace experimental::execution
         using _base_t = STDEXEC::__any::__interface_base<_interface_, _Base, _extends_t>;
        public:
         using completion_signatures = __to_sequence_completions_t<_Sigs>;
-        using item_types            = exec::item_types<_item_sender_t>;
+        using item_types            = execution::item_types<_item_sender_t>;
         using sender_concept        = sequence_sender_t;
         using _any_receiver_ref_t   = any_sequence_receiver_ref<_Sigs, _Queries>;
         using _base_t::_base_t;
@@ -113,7 +113,7 @@ namespace experimental::execution
             return STDEXEC::__any::__value(std::move(*this)).subscribe(std::move(_rcvr));
           else
             return _any_opstate_base{__in_place_from,
-                                     exec::subscribe,
+                                     execution::subscribe,
                                      STDEXEC::__any::__value(std::move(*this)),
                                      std::move(_rcvr)};
         }
@@ -173,8 +173,8 @@ namespace experimental::execution
         STDEXEC::__any::__any_ptr<_any::_isequence_receiver<_Sigs, _Queries>::template _interface_>>
   {
    private:
-    using _item_sender_t = any_sender<any_receiver<_Sigs, _Queries>>;
-    using _item_types_t  = exec::item_types<_item_sender_t>;
+    using _item_sender_t = execution::any_sender<any_receiver<_Sigs, _Queries>>;
+    using _item_types_t  = execution::item_types<_item_sender_t>;
     using _base_t        = STDEXEC::__pointer_receiver<
              STDEXEC::__any::__any_ptr<_any::_isequence_receiver<_Sigs, _Queries>::template _interface_>>;
 

include/stdexec/__detail/__any.hpp

@@ -1751,7 +1751,7 @@ namespace STDEXEC::__any
     constexpr explicit __any(__in_place_from_t, _Fn &&__fn, _Args &&...__args)
       : __any()
     {
-      (*this).template __emplace_from_(static_cast<_Fn &&>(__fn), static_cast<_Args &&>(__args)...);
+      (*this).__emplace_from_(static_cast<_Fn &&>(__fn), static_cast<_Args &&>(__args)...);
     }
 
     // Implicit derived-to-base conversion constructor

include/stdexec/__detail/__awaitable.hpp

@@ -84,12 +84,18 @@ namespace STDEXEC
   constexpr auto __as_lvalue(_Tp &&) -> _Tp &;
 
   template <class _Awaitable, class... _Promise>
-    requires __awaitable<_Awaitable, _Promise...>
-  using __await_result_t = decltype(STDEXEC::__as_lvalue(
+  struct __await_result
+  {
+    using __t = decltype(STDEXEC::__as_lvalue(
                                       STDEXEC::__get_awaiter(
                                         STDEXEC::__get_awaitable(__declval<_Awaitable>(),
                                                                  __declval<_Promise &>()...)))
                                       .await_resume());
+  };
+
+  template <class _Awaitable, class... _Promise>
+    requires __awaitable<_Awaitable, _Promise...>
+  using __await_result_t = __t<__await_result<_Awaitable, _Promise...>>;
 
 #else
 

include/stdexec/__detail/__connect_awaitable.hpp

@@ -162,6 +162,7 @@ namespace STDEXEC
         : __opstate_(__opstate)
       {}
 
+#  if !STDEXEC_GCC() || STDEXEC_GCC_VERSION >= 12'00
       static constexpr auto
       operator new([[maybe_unused]] std::size_t __bytes, __opstate_t& __opstate) noexcept -> void*
       {
@@ -173,6 +174,7 @@ namespace STDEXEC
       {
         // no-op
       }
+#  endif
 
       constexpr auto get_return_object() noexcept -> __task
       {