Actual argument specification
- arg_keyword
- is a dummy argument name in the explicit interface of the procedure being invoked
- argument
- is an actual argument
%VAL, %REF- specifies the passing method. See %VAL and %REF (IBM extension) for more information.
An actual argument appears in the argument list of a procedure
reference. The following actual arguments
are valid in procedure references:
- An expression
- A variable
- A procedure name
- An alternate return specifier (if the actual argument is in a CALL statement), having the form *stmt_label, where stmt_label is the statement label of a branch target statement in the same scoping unit as the CALL statement.
An actual argument specified in a statement function reference must be a scalar object.
In Fortran 2003, a procedure name cannot be the name
of an internal procedure, statement function, or the generic name
of a procedure, unless it is also a specific name. 
However, Fortran 2008 permits the name of an internal procedure.
The rules and restrictions for referencing a procedure described in Procedure references. You cannot use a non-intrinsic elemental procedure as an actual argument in Fortran 95.
