[flang] Add semantics test for `get_team`

[ktras]

Summary

Add a semantics test for the intrinsic function get_team.

[ngeorge1098]

flang/test/Semantics/get_team.f90

9

This is more of a nitpick, but the variable i is not used in this test, so I assume that it can be removed.

[ktras]

Remove unused variable from the test.

[ngeorge1098]

Looks good to me.

[ktras]

@ngeorge1098 Thanks for the review!

flang/test/Semantics/get_team.f90

+! RUN: %python %S/test_errors.py %s %flang_fc1
+! Check for semantic errors in get_team(), as defined in
+! section 16.9.85 of the Fortran 2018 standard
+
+program get_team_test
+  use iso_fortran_env, only: team_type, initial_team, current_team, parent_team
+  implicit none
+
+  integer n, i, array(1), coarray[*]
+  type(team_type) :: result_team
+  logical wrong_result_type, non_integer
+
+  !___ standard-conforming statement with no optional arguments present ___
+  result_team = get_team()
+
+  !___ standard-conforming statements with optional level argument present ___
+  result_team = get_team(-1)
+  result_team = get_team(-2)
+  result_team = get_team(-3)
+  result_team = get_team(initial_team)
+  result_team = get_team(current_team)
+  result_team = get_team(parent_team)
+  result_team = get_team(n)
+  result_team = get_team(array(1))
+  result_team = get_team(array(n))
+  result_team = get_team(coarray[1])
+  result_team = get_team(level=initial_team)
+  result_team = get_team(level=n)
+
+  !___ non-conforming statements ___
+  !ERROR: 'level=' argument has unacceptable rank 1
+  result_team = get_team(array)
+
+  !ERROR: Actual argument for 'level=' has bad type 'LOGICAL(4)'
+  result_team = get_team(non_integer)
+
+  !ERROR: Actual argument for 'level=' has bad type 'REAL(4)'
+  result_team = get_team(3.4)
+
+  !ERROR: too many actual arguments for intrinsic 'get_team'
+  result_team = get_team(current_team, parent_team)
+
+  !ERROR: Actual argument for 'level=' has bad type 'REAL(4)'
+  result_team = get_team(level=3.4)
+
+  !ERROR: unknown keyword argument to intrinsic 'get_team'
+  result_team = get_team(levels=initial_team)
+
+  !ERROR: repeated keyword argument to intrinsic 'get_team'
+  result_team = get_team(level=initial_team, level=parent_team)
+
+  !ERROR: No intrinsic or user-defined ASSIGNMENT(=) matches operand types LOGICAL(4) and TYPE(__builtin_team_type)
+  wrong_result_type = get_team()
+
+end program get_team_test