Browse thread
[Caml-list] Polymorphic methods in class objects
-
Narayanan Krishnamurthy
- Narayanan Krishnamurthy
- Brian Rogoff
[
Home
]
[ Index:
by date
|
by threads
]
[ Message by date: previous | next ] [ Message in thread: previous | next ] [ Thread: previous | next ]
[ Message by date: previous | next ] [ Message in thread: previous | next ] [ Thread: previous | next ]
| Date: | -- (:) |
| From: | Narayanan Krishnamurthy <Narayanan.Krishnamurthy@m...> |
| Subject: | [Caml-list] Re: Polymorphic methods in class objects |
Ooops!! I'd a typo and I've
changed it below.
Thanx.
Narayanan Krishnamurthy wrote:
>
> Hi,
>
> This is probably a very naive question,
> but I'm going to ask it anyways.
> I was trying to define a polymorphic
> method 'foo' as shown in the class below,
> but have not been able to compile it in Ocaml
> because of type unification problems.
> I'm not sure why this is not possible,
> since the compiler should be able to build a variant type
> automatically as the value of the expression 'foo'.
> Is there a fundamental reason or is it because
> it is against the principle of strong typing.
>
> Other than defining variant types to deal
> with this, is there any other solution?
> Any help would be greatly appreciated.
> Thanx.
>
> (*********************************************)
> class polym =
> object(self)
> val i = 0
> method private func1 j = j + 1
> method private func2 j = string_of_int j
> method private func3 j = float_of_int j
> method private foo polymf n =
> polymf n
> method goo () =
> self#foo self#func1 2
> method hoo () =
> self#foo self#func2 2
> method boo () =
> self#foo self#func3 2
> end
>
> (* I would like to do the following *)
> let m = new polym
>
> m#goo () returns 3
> m#hoo () returns "2"
> m#boo () returns "2.0"
>
> (****************************************************)
> --
> **************************************************************************
> Narayanan Krishnamurthy (Nari)
> ASP Advanced Tools and Methodology
> Motorola SPS Architecture and Systems Platforms
> Motorola Inc. Semiconductor Products Sector
> 7700 W. Parmer Lane, Austin, TX 78729
>
> Loc/MD: TX32/PL30 _
> email : nari@ibmoto.com / \ email:
> Narayanan.Krishnamurthy@motorola.com
> Ph : (512) 996-4863 |O O| Fax : (512) 996-7432
> ************************| I
> |*********************************************
> \ o /
> ---
--
**************************************************************************
Narayanan Krishnamurthy (Nari)
ASP Advanced Tools and Methodology
Motorola SPS Architecture and Systems Platforms
Motorola Inc. Semiconductor Products Sector
7700 W. Parmer Lane, Austin, TX 78729
Loc/MD: TX32/PL30 _
email : nari@ibmoto.com / \ email:
Narayanan.Krishnamurthy@motorola.com
Ph : (512) 996-4863 |O O| Fax : (512) 996-7432
************************| I
|*********************************************
\ o /
---
-------------------
To unsubscribe, mail caml-list-request@inria.fr Archives: http://caml.inria.fr
Bug reports: http://caml.inria.fr/bin/caml-bugs FAQ: http://caml.inria.fr/FAQ/
Beginner's list: http://groups.yahoo.com/group/ocaml_beginners