Method set_error

include/exec/detail/shared.hpp:95–98

    template <class _Error>
    STDEXEC_ATTRIBUTE(always_inline)
    constexpr void set_error(_Error&& __err) noexcept
    {
      __sh_state_->__complete(set_error_t(), static_cast<_Error&&>(__err));
    }

    STDEXEC_ATTRIBUTE(always_inline)
    constexpr void set_stopped() noexcept