    const std = @import("../../std.zig");
    const testing = std.testing;
    const math = std.math;
    const cmath = math.complex;
    const Complex = cmath.Complex;

    /// Returns the complex conjugate of z.
    pub fn conj(z: anytype) Complex(@TypeOf(z.re)) {
        const T = @TypeOf(z.re);
        return Complex(T).init(z.re, -z.im);
    }

    test "complex.conj" {
        const a = Complex(f32).init(5, 3);
        const c = a.conjugate();

        try testing.expect(c.re == 5 and c.im == -3);
    }