From: Norman Ramsey Re: Switch/Case statements revisited

[Norman Ramsey Re: Switch/Case statements revisited]

|> Date: Thu, 08 Nov 2007 20:21:50 -0500
|> From: Norman Ramsey <nr@eecs.harvard.edu>
|> Subject: Re: Switch/Case statements revisited 
|> To: Lua list <lua@bazar2.conectiva.com.br>
|> Message-ID: <20071109012150.4749D1EB38E@labrador.eecs.harvard.edu>
|> 
|> A few comments:
|> 
|>   * While I love Haskell/OCaml matching with pattern guards, I don't
|>     see that as a good model for Lua, because Lua has no notion of
|>     constant or constructor

It`s no true. `Nil`, `false` , `true`, 0.0, 1.0 ... {}, functions is a
constant.
On meta-lua `Let{..}, 'And{..}  is may be matched
On LOOP Object-meta-table may be too, if you can release this.

|>   * Of existing languages with case statements, the model I know of
|>     that most closely fits Lua is the Icon programming language.
|>     There as in Lua there are no special constants and the case
|>     expression is simply another way of writing nested if's.
Icon:
	case s of {   "begin" :  depth := depth + 1    "end" :  depth :=
depth - 1    }
	case i of {    j + 1 :  write("high")    j - 1 :  write("low")    j
:  write("equal")    default :  write("out of range")    }
Is it simple? I was not understanding, it`s terrible, not contexted syntax.