Returns the next representable neighbor of x in the direction towards y.
Remember to link the math library: valac -X -lm ...
The size of the step between x and the result depends on the type of the result.
If x = y the function simply returns y. If either value is float.NAN
, then float.NAN is returned. Otherwise a value corresponding to the value of the least
significant bit in the mantissa is added or subtracted, depending on the direction.
| x |
A numeric value. |
| y |
A numeric value. |