removes a StopWatch
watch from a watch group
subroutine leave_watchgroup (watch, handle, err)
Removes the specified watch(es) from the specified watch group.
One or more watches must be specified. The argument watch can be a single variable of type watchtype (see stopwatch(3)) to remove one watch, or an array of type watchtype to remove several watches.
The watch group is specified by handle, a variable of type watchgroup.
If present, the optional intent OUT integer argument err returns a status code. The code is the sum of the values listed below.
An error message will be printed to a specified I/O unit (unit 6 by default) if print_errors is TRUE (default is TRUE). The error message contains more detail about the cause of the error than can be obtained from just the status code, so you should set print_errors to TRUE if you have trouble determining the cause of the error.
If abort_errors is TRUE (default is FALSE), the program will terminate on an error condition. Otherwise, the program will continue execution but the watch(es) will not be removed from the group.
See option_stopwatch(3) for further information on print_errors, abort_errors and I/O units.
The relevant status codes and messages are:
type (watchtype) w1, w2(3)
type (watchgroup) g1
call leave_watchgroup(w1, g1)
call leave_watchgroup(w2, g1, errcode)
The first call removes the watch w1 from watch group g1.
The second call removes three watch from g1 and returns a status code.
It cannot be determined whether or not a watch variable or watch group has been created (passed as an argument to create_watch or create_watchgroup). If a watch or watch group that has never been created is passed into leave_watchgroup, it might generate a Fortran error due to passing a pointer with undefined association status to the Fortran intrinsic function associated. Some compilers will allow this as an extension to the Fortran 90 standard and recognize that the pointer is not associated, in which case the ``Watch needs to be created'' error message is generated.