From: maranget@yquem.inria.fr (Luc Maranget)
To: David Allsopp <dra-news@metastack.com>
Cc: 'bluestorm' <bluestorm.dylc@gmail.com>,
caml-list@yquem.inria.fr,
'W Dan Meyer' <wojciech.meyer@googlemail.com>
Subject: Re: [Caml-list] Converting variants with only constant constructors to integers
Date: Tue, 8 Jun 2010 11:36:51 +0200 [thread overview]
Message-ID: <20100608093651.GA8296@yquem.inria.fr> (raw)
In-Reply-To: <015201cb06ea$f06adc00$d1409400$@romulus.metastack.com>
> Of course, if you have the following:
>
> type t = A | B | C
> let int_of_t = function
> A -> 0
> | B -> 1
> | C -> 2
>
> Then in fact I believe that the compiler already converts that to a
> hashtable lookup instead of a sequence of jumps..
The compiler does not convert the above code to 'hashtable lookup'.
--Luc
PS>
To have a look at produced code.
* put your (Caml) code in some file say a.ml;
* compile as ocamlopt -S a.ml
* look at a.s
You can also use various options, such as -dlambda or -dcmm, to
see intermediate stages of the compilation process.
next prev parent reply other threads:[~2010-06-08 9:36 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-06-07 18:07 Török Edwin
2010-06-07 18:25 ` [Caml-list] " W Dan Meyer
2010-06-07 18:45 ` bluestorm
[not found] ` <87sk4y7lc7.fsf@gmail.com>
[not found] ` <4C0D3B0F.4060502@gmail.com>
2010-06-07 18:32 ` Török Edwin
2010-06-07 18:50 ` W Dan Meyer
2010-06-07 18:48 ` David Allsopp
2010-06-07 19:46 ` Török Edwin
2010-06-07 19:56 ` bluestorm
2010-06-07 22:51 ` W Dan Meyer
2010-06-08 7:42 ` David Allsopp
2010-06-08 7:59 ` bluestorm
2010-06-08 9:14 ` David Allsopp
2010-06-08 9:36 ` Luc Maranget [this message]
2010-06-08 9:45 ` David Allsopp
2010-06-08 9:51 ` Luc Maranget
2010-06-08 10:21 ` David Allsopp
2010-06-08 10:21 ` Dario Teixeira
2010-06-08 11:28 ` Kaustuv Chaudhuri
2010-06-08 11:40 ` bluestorm
2010-06-08 14:37 ` Jacques Garrigue
2010-06-08 18:22 ` Kaustuv Chaudhuri
2010-06-09 1:34 ` Jacques Garrigue
2010-08-23 14:36 ` Damien Doligez
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