optimize/functions: use ++ and -- operators
@@ -1766,11 +1766,11 @@ func (f Plassmann) Grad(grad, x []float64) {
grad[0] = (1 - b) * math.Cos(l*math.Pi/2*a)
switch {
case a <= 1-b:
- grad[0] -= 1
+ grad[0]--
case 1-b < a && a <= 1+b:
grad[0] += (a - 1) / b
default: // a > 1+b
- grad[0] += 1
+ grad[0]++
}
}
