Assign new_tau to tau
new_tau has to be min_tau <= new_tau <= max_tau.
If the change of tau is sufficiently large (determined by threshhold),
then reason is printed and the change is registered.
This is relevant for the stop-methods that depend on the last relevant
change of tau.
| Type | Intent | Optional | Attributes | Name | ||
|---|---|---|---|---|---|---|
| real(kind=dp), | intent(in) | :: | new_tau | |||
| character(len=*), | intent(in) | :: | reason |
Message that gets printed when change was sufficiently large. |