camlp4: Curried constructor error

camlp4: Curried constructor error

[Joel Reymont]

Folks,

I have a the following function and invocation:

let render = <:octalfile<templ.html>>

print_endline (Xml.to_string_fmt (Templ.render ~page ~visitor));;

I thought I would make render take an argument so I first tried

let render x = <:octalfile< x >>

print_endline (Xml.to_string_fmt (Templ.render "templ.html" ~page  
~visitor));;

File "main.ml", line 31, characters 34-46:
This function is applied to too many arguments,
maybe you forgot a `;'

I thought I would make render take a couple more arguments

let render x y z = <:octalfile< x >> y z

but this complains

File "ghost-location", line 1, characters 0-0:
Parse error: currified constructor

What's the proper way to make render take a file name?

	Thanks, Joel

--
http://wagerlabs.com/

Re: camlp4: Curried constructor error

[Joel Reymont]

Foot in mouth. camlp4 in this case is doing compile-time expansion  
and cannot take runtime variables. Oh, well...

On Apr 2, 2007, at 2:20 PM, Joel Reymont wrote:

> Folks,
>
> I have a the following function and invocation:
>
> let render = <:octalfile<templ.html>>
>
> print_endline (Xml.to_string_fmt (Templ.render ~page ~visitor));;

--
http://wagerlabs.com/

Re: [Caml-list] Re: camlp4: Curried constructor error

[Nicolas Pouillard]

On 4/2/07, Joel Reymont <joelr1@gmail.com> wrote:
> Foot in mouth. camlp4 in this case is doing compile-time expansion
> and cannot take runtime variables. Oh, well...

camlp4 always do compile-time expansion but you can insert code using
antiquotations.

<:expr< Some >> x      ==> WRONG
<:expr< Some $x$ >> ==> RIGHT

-- 
Nicolas Pouillard