the newline _character_?

Luke Gorrie <>
Thu Nov 21 18:14:49 CET 2002


Ulf Wiger <> writes:

> On Thu, 21 Nov 2002, Bengt Kleberg wrote:
> 
> >moreover, is there is_whitespace() function is some module?
> 
> In xmerl, it's done like this:
> 
> %% whitespace consists of 'space', 'carriage return',
> %% 'line feed' or 'tab'
> -define(whitespace(H), H==?space ;
>                        H==?cr ;
>                        H==?lf ;
>                        H==?tab).
> 
> Example:
> 
> scan_prolog(T = [H|_], S, Pos) when ?whitespace(H) ->
>     ?dbg("prolog(whitespace)~n", []),
>     ?strip1,
>     scan_prolog(T1, S1, Pos).
> 
> 
> Beautiful, eh?  ;-)

The C programmer in me wonders what this would do:

  atom_and_whitespace(A, Ch) when atom(A), ?whitespace(Ch) -> true;
  atom_and_whitespace(A, Ch) -> false.

:-)

-Luke




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