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ocamlvariant
Brandon Slaght
Brandon Slaght

Reputation: 1057

Getting value of variant in Ocaml

Say I have a variant v defined by: 

type value =    
    | Value of int
    | Error of string;;

I want to do something if v is a Value and something else if v is an Error, how can I determine this and perform different behaviors based on it?

Upvotes: 0

Views: 455

Answers (1)

Jeffrey Scofield
Jeffrey Scofield

Reputation: 66808

That's what the match expression is for:

match v with
| Value n -> (* Something with n *)
| Error s -> (* Something with s *)

(Insofar as OCaml is a functional language, it might be better to think in terms of values rather than behaviors. But OCaml can also be an imperative language if you wish.)

Upvotes: 2

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