Method operator delete

include/exec/start_detached.hpp:126–135

      }

      static constexpr void operator delete(__operation* __self, std::destroying_delete_t) noexcept
      {
        auto __alloc       = STDEXEC::__with_default(STDEXEC::get_allocator,
                                               std::allocator<__operation>())(__self->__env_);
        using __alloc_t    = decltype(__alloc);
        using __op_alloc_t = std::allocator_traits<__alloc_t>::template rebind_alloc<__operation>;
        __op_alloc_t __op_alloc{__alloc};
        std::allocator_traits<__op_alloc_t>::destroy(__op_alloc, __self);
        std::allocator_traits<__op_alloc_t>::deallocate(__op_alloc, __self, 1);
      }

      STDEXEC_IMMOVABLE_NO_UNIQUE_ADDRESS
      STDEXEC::submit_result<_Sender, __receiver<_Env>> __op_data_;