Here’s a little toy example: subroutine print_present(opt, name) implicit none real, intent(in), dimension(:), optional :: opt character(len=*), intent(in) :: name print*,name, present(opt) end subroutine print_present Passing a zero-sized array seems to result in what looks li…

Bug or undefined behaviour in passing zero-sized arrays as optional argument?

Beliavsky November 16, 2021, 11:55am 3

Topic		Replies	Views
An unallocated variable passed as an argument is not PRESENT	14	2218	August 24, 2021
Are zero-length arrays OK Help	3	1133	April 1, 2022
Inquire status of (non)allocatable arrays	16	813	November 5, 2023
Passing element of an optional array as optional scalar argument Help	21	1026	August 16, 2024
Undefined variables Help	12	1359	June 11, 2022