Parameter expression bugs

[JFH]

Ifx -stand f23 gives 3 error messages for this program, but the type parameter inquiry x%kind and aimag(z) in a constant expression both became valid Fortran in 2003; the complex part designator x%im became valid Fortran in 2008. F2023 5.4.3.2.4 implies that a subobject need not be a variable. The program and its compile-time messages:
```
program imconsts
implicit none ! file imconsts.f90
complex,parameter :: z = (5,7)/9.0
integer,parameter :: zk = z%kind
real ,parameter :: zi1 = aimag(z), zi2 = z%im
print "(I0,2F10.7)", zk, zi1, zi2
end program imconsts

(lf) john:~$ intel/oneapi/compiler/2025.1/bin/ifx -stand f23 imconsts.f90
imconsts.f90(4): error #7747: Invalid parameter expression. [Z]
integer,parameter :: zk = z%kind
-----------------------------^
imconsts.f90(5): warning #6009: Fortran 2023 specifies that an elemental intrinsic function here be of type integer or character and each argument must be an initialization expr of type integer or character. [AIMAG]
real ,parameter :: zi1 = aimag(z), zi2 = z%im
-----------------------------^
imconsts.f90(5): error #7747: Invalid parameter expression. [Z]
real ,parameter :: zi1 = aimag(z), zi2 = z%im
---------------------------------------------^
compilation aborted for imconsts.f90 (code 1)
```

[andrew_4619]

There have been numerous IFX bugs reported relating to constant expressions to define a parameter. Do a forum search yours might be a repeat.

[JFH]

The only repeat I found is that the %kind bug was said to have been fixed in ifx 2025.0 but it's back again in 2025.1. See @sblionel's bug report and the reply in these screenshots:

[taehunkim]

Hi,

We also found that ifx does not support for the initialization of the derived type in the declaration section and started triaging it with development team.

Thanks.