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function delay(E1 &&, std::reference_wrapper<delay_state<T, samples, STag>>) fir

template <size_t samples, typename T, typename E1, univector_tag STag>
KFR_INTRINSIC expression_delay<samples, E1, true, STag> delay(
    E1&& e1, std::reference_wrapper<delay_state<T, samples, STag>> state)

Returns template expression that applies delay to the input (uses ring buffer in state)

Parameters
state delay filter state (taken by reference)
e1 an input expression 
univector<double, 10> v = counter();
 delay_state<double, 4> state;
 auto d = delay(state, v);

Defined at dsp/delay.hpp:183