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On 08.01.22 20:19, vincent douce wrote:

hi
before i post this on https://savannah.gnu.org/task/?group=texmacs&func=additem <https://savannah.gnu.org/task/?group=texmacs&func=additem>

could you tell me if maybe it still exists :
- transform a/b into b/a (with the same type of fraction, "frac", "dfrac" etc)

I have copied the example in the Scheme developer guide


(define (swap-numerator-denominator t)
(:require (tree-is? t 'frac))
(with p (tree-cursor-path t)
(tree-set! t `(frac ,(tree-ref t 1) ,(tree-ref t 0)))
(tree-go-to t (cons (- 1 (car p)) (cdr p)))
(tree-focus t)))

(define (swap-numerator-denominator t)
(and-with p (tree-outer t)
(swap-numerator-denominator p)))

end of Sect. 3.2, "A worked example", but I did not yet get it to work. I'll update you when I make a step forward

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• requests, vincent douce, 01/08/2022
  • Re: requests, Giovanni Piredda, 01/08/2022
    • Re: requests, vincent douce, 01/08/2022
  • Re: requests, Giovanni Piredda, 01/17/2022

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