[Caml-list] Stupid question about the toplevel

[Caml-list] Stupid question about the toplevel

[Brian Hurt]

An example toplevel experience:
$ ocaml
        Objective Caml version 3.07
 
# 3+4;;
- : int = 7
#

So what's the "-" at the begining of the line mean?  Originally I thought 
it meant that the input came from stdin, but I've been unable to change it 
to anything else.  Is it just "this line comes from the toplevel and not 
your code"?

It's bugging me now.

-- 
"Usenet is like a herd of performing elephants with diarrhea -- massive,
difficult to redirect, awe-inspiring, entertaining, and a source of
mind-boggling amounts of excrement when you least expect it."
                                - Gene Spafford 
Brian

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Re: [Caml-list] Stupid question about the toplevel

[Falk Hueffner]

Brian Hurt <bhurt@spnz.org> writes:

> An example toplevel experience:
> $ ocaml
>         Objective Caml version 3.07
>  
> # 3+4;;
> - : int = 7
> #
>
> So what's the "-" at the begining of the line mean?  Originally I thought 
> it meant that the input came from stdin, but I've been unable to change it 
> to anything else.  Is it just "this line comes from the toplevel and not 
> your code"?

No, it's the identifier the value was bound to:

# let x = 17;;
val x : int = 17

-- 
	Falk

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Re: [Caml-list] Stupid question about the toplevel

[Brian Hurt]

On Fri, 2 Apr 2004, Falk Hueffner wrote:

> No, it's the identifier the value was bound to:
> 
> # let x = 17;;
> val x : int = 17
> 
> 

Duh.  Now I feel stupid.

-- 
"Usenet is like a herd of performing elephants with diarrhea -- massive,
difficult to redirect, awe-inspiring, entertaining, and a source of
mind-boggling amounts of excrement when you least expect it."
                                - Gene Spafford 
Brian

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Re: [Caml-list] Stupid question about the toplevel

[Nicolas Cannasse]

> An example toplevel experience:
> $ ocaml
>         Objective Caml version 3.07
>
> # 3+4;;
> - : int = 7
> #
>
> So what's the "-" at the begining of the line mean?  Originally I thought
> it meant that the input came from stdin, but I've been unable to change it
> to anything else.  Is it just "this line comes from the toplevel and not
> your code"?
>
> It's bugging me now.

what about :

# let x = 3;;
val x : int = 3

that "-"'s meaning is that it's not bound to any identifier.

Regards,
Nicolas Cannasse

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Re: [Caml-list] Stupid question about the toplevel

[Pierre Weis]

[...]
> - : int = 7
> #
> 
> So what's the "-" at the begining of the line mean?

It means: ``your input is an expression that computes a value''.

Regards,

Pierre Weis

INRIA, Projet Cristal, Pierre.Weis@inria.fr, http://pauillac.inria.fr/~weis/


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Re: [Caml-list] Stupid question about the toplevel

[Matt Gushee]

On Fri, Apr 02, 2004 at 03:47:17PM -0600, Brian Hurt wrote:
> 
> An example toplevel experience:
> $ ocaml
>         Objective Caml version 3.07
>  
> # 3+4;;
> - : int = 7
> #
> 
> So what's the "-" at the begining of the line mean?  Originally I thought 
> it meant that the input came from stdin, but I've been unable to change it 
> to anything else.

I'm going to answer your question with a question (don't you hate it
when people do that?):

# let foo = 3+4;;
val foo : int = 7
#

So what does the "val foo" at the beginning of the line mean?

-- 
Matt Gushee                 When a nation follows the Way,
Englewood, Colorado, USA    Horses bear manure through
mgushee@havenrock.com           its fields;
http://www.havenrock.com/   When a nation ignores the Way,
                            Horses bear soldiers through
                                its streets.
                                
                            --Lao Tzu (Peter Merel, trans.)

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