[Caml-list] nosy p4 question

[Caml-list] nosy p4 question

[Ian Zimmerman]

Just how does camlp4 manage to change the toplevel input sytax?  The
toplevel has no -pp option ..

Does it redefine the toplevel's internal parser?

-- 
Ian Zimmerman, Oakland, California, U.S.A.
GPG: 433BA087  9C0F 194F 203A 63F7 B1B8  6E5A 8CA3 27DB 433B A087
In his own soul a man bears the source
from which he draws all his sorrows and his joys.
Sophocles.
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Re: [Caml-list] nosy p4 question

[Daniel de Rauglaudre]

Hi,

On Wed, Jan 23, 2002 at 12:00:44PM -0800, Ian Zimmerman wrote:

> Just how does camlp4 manage to change the toplevel input sytax?  The
> toplevel has no -pp option ..

To get the normal OCaml syntax + streams & parsers, type:
   #load "camlp4o.cma";;

To get the revised syntax, type:
   #load "camlp4r.cma";;

You can afterwards change syntax or add syntax extensions by loading the
corresponding cmo or cma file.

-- 
Daniel de RAUGLAUDRE
daniel.de_rauglaudre@inria.fr
http://cristal.inria.fr/~ddr/
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Re: [Caml-list] nosy p4 question

[Ian Zimmerman]

itz> Just how does camlp4 manage to change the toplevel input sytax?
itz> The toplevel has no -pp option ..

Daniel> To get the normal OCaml syntax + streams & parsers, type:
Daniel> #load "camlp4o.cma";;

Daniel> To get the revised syntax, type: #load "camlp4r.cma";;

Daniel> You can afterwards change syntax or add syntax extensions by
Daniel> loading the corresponding cmo or cma file.

Yes, thanks, but I already know that :-)

My question was, _how_ you do it - that's why I labelled it "nosy"

Best regards,

-- 
Ian Zimmerman, Oakland, California, U.S.A.
GPG: 433BA087  9C0F 194F 203A 63F7 B1B8  6E5A 8CA3 27DB 433B A087
In his own soul a man bears the source
from which he draws all his sorrows and his joys.
Sophocles.
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Re: [Caml-list] nosy p4 question

[Daniel de Rauglaudre]

Hi,

On Wed, Jan 23, 2002 at 12:36:23PM -0800, Ian Zimmerman wrote:

> My question was, _how_ you do it - that's why I labelled it "nosy"

The function which parses the input is a hook (a reference) which
can be modified: it is Toploop.parse_toplevel_phrase. I just lay
my eggs there.

Same for pretty printing. The main hook is Toploop.print_out_value.

-- 
Daniel de RAUGLAUDRE
daniel.de_rauglaudre@inria.fr
http://cristal.inria.fr/~ddr/
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Re: [Caml-list] nosy p4 question

[Ian Zimmerman]

itz> My question was, _how_ you do it - that's why I labelled it "nosy"

Daniel> The function which parses the input is a hook (a reference) which
Daniel> can be modified: it is Toploop.parse_toplevel_phrase. I just lay
Daniel> my eggs there.

Great, thanks!  That's what I wanted to know.

-- 
Ian Zimmerman, Oakland, California, U.S.A.
GPG: 433BA087  9C0F 194F 203A 63F7 B1B8  6E5A 8CA3 27DB 433B A087
In his own soul a man bears the source
from which he draws all his sorrows and his joys.
Sophocles.
-------------------
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