vector_lookup.h

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#pragma once
 
#include "di/assert/assert_bool.h"
#include "di/container/vector/constant_vector.h"
#include "di/container/vector/vector_data.h"
#include "di/container/vector/vector_size.h"
#include "di/types/prelude.h"
 
namespace di::container::vector {
constexpr auto lookup(concepts::detail::ConstantVector auto& vector, size_t index) -> decltype(auto) {
    DI_ASSERT(index < vector::size(vector));
    return vector::data(vector)[index];
}
}