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Re: Bug in N_PARAMS? [message #64071 is a reply to message #63986]

Thu, 27 November 2008 13:53

Mark[1]
Messages: 66
Registered: February 2008

Member

On Nov 26, 3:29 am, "Kenneth P. Bowman" <k-bow...@null.edu> wrote:
> Ah. That significantly restricts the utility of
>
> SWITCH N_PARAMS() OF
> 0 : ...
>
> ENDSWITCH
>
> to provide default values for optional parameters.

Indeed. N_ELEMENTS is what you need for that. The only use I have
found for N_PARAMS is for writing wrapper routines

pro wrapper, P1, P2, P3, P4, _REF_EXTRA=_extra
;; Do some other stuff
case n_params() of
0: wrappee, _STRICT_EXTRA=_extra
1: wrappee, P1, _STRICT_EXTRA=_extra
2: wrappee, P1, P2, _STRICT_EXTRA=_extra
3: wrappee, P1, P2, P3, _STRICT_EXTRA=_extra
4: wrappee, P1, P2, P3, P4, _STRICT_EXTRA=_extra
endcase
end

Ugly, but sometimes necessary.

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[Message index]

		Re: Bug in N_PARAMS? By: David Fanning on Wed, 26 November 2008 07:49
		Re: Bug in N_PARAMS? By: Carsten Lechte on Tue, 25 November 2008 23:53
		Re: Bug in N_PARAMS? By: Kenneth P. Bowman on Tue, 25 November 2008 06:29
		Re: Bug in N_PARAMS? By: David Fanning on Mon, 24 November 2008 14:20
		Re: Bug in N_PARAMS? By: Mark[1] on Thu, 27 November 2008 13:53
		Re: Bug in N_PARAMS? By: Brian Larsen on Tue, 02 December 2008 07:03
		Re: Bug in N_PARAMS? By: David Fanning on Wed, 03 December 2008 09:06

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