Feature function1 limit range

Function1 wrapper that limits the input range of another Function1

Example usage for limiting a polynomial:

limitedPolyTest        limitRange;
limitedPolyTestCoeffs
{
    min         0.4;
    max         1.4;

    value       polynomial
    (
        (5 1)
        (-2 2)
        (-2 3)
        (1 4)
    );
}

Here the return value will be:

• poly(0.4) for x <= 0.4;
• poly(1.4) for x >= 1.4; and
• poly(x) for 0.4 < x < 1.4.