Compile time (constexpr) sine table generator

main.cpp

#include <array>
#include <cmath>

/**
* @brief Compile-time sine table creation function.
*
* @tparam SZ Table size.
* @param fs Sample frequency.
* @param f Sine frequency.
*
* @note Not portable, works only with GCC!
*/
template<size_t SZ>
constexpr std::array<double, SZ> compute_sine_table(double fs, double f)
{
    std::array<double, SZ> table{};
    const auto pi = std::acos(-1);

    for (size_t n = 0; n < SZ; ++n) {
        table[n] = std::sin(2 * pi * f / fs * n);
    }

    return table;
}

constexpr auto sine_table = compute_sine_table<100000>(10.0, 1.0);