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I tried entering the code from p.287 of "Foundations of F#"

> #light
 let lexbuf=Lexing.from_string "1"
 let token=Lex.token lexbuf
 print_any token;;

  let token=Lex.token lexbuf
  ----------^^^^

stdin(3,10): error: FS0039: The namespace or module 'Lex' is not defined.

  print_any token;;
  ----------^^^^^^

stdin(5,10): error: FS0039: The value or constructor 'token' is not defined.
stopped due to error

could somebody point me in the right direction ?

Hi Dinosaur,

The problem appears to be that the Lex module is missing (this would cause both compile errors). The Lex module comes from the lexer that needs to be compiled to F# source using fslex and then compiled using, in your case F# interactive, or the F# compiler.

I strongly advise you to download the source from the apress site:
[link:www.apress.com]

This saves you having to retype the listing and inculdes visual studio project files.

Cheers,
Rob

By Robert on 12/29/2007 12:52 AM (permalink)

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