Intrinsic procedures
An intrinsic procedure is a procedure already defined by XL Fortran. See Intrinsic procedures for details.
You can reference some intrinsic procedures by a generic name, some by
a specific name, and some by both:
- A generic intrinsic function
- does not require a specific argument type and usually produces a result of the same type as that of the argument, with some exceptions. Generic names simplify references to intrinsic procedures because the same procedure name can be used with more than one type of argument; the type and kind type parameter of the arguments determine which specific function is used.
- A specific intrinsic function
- requires a specific argument type and produces a result of a specific
type.
A specific intrinsic function name can be passed as an actual argument. If a specific intrinsic function has the same name as a generic intrinsic function, the specific name is referenced. All references to a dummy procedure that are associated with a specific intrinsic procedure must use arguments that are consistent with the interface of the intrinsic procedure. Specific intrinsic functions may be procedure pointer targets.
Whether or not you can pass the name of an intrinsic procedure as an argument
depends on the procedure. You can use the specific name of an intrinsic procedure
that has been specified with the INTRINSIC attribute as an actual
argument in a procedure reference.
- An IMPLICIT statement does not change the type of an intrinsic function.
- If an intrinsic name is specified with the INTRINSIC attribute, the name is always recognized as an intrinsic procedure.
