Re: Feature request - 'fill'
On Tue, Dec 14, 2021 at 3:15 AM Erik Gustafson wrote: > > I think Alex has shown that ',' and ',@' can be rolled into one - '^' > > : (let X (1 2) (macro (1 (^ X) 2))) > -> (1 (1 2) 2) > : (let X (1 2) (macro (1 ^ X 2))) > -> (1 1 2 2) > : (let X (1 2) (macro (1 ^ (apply + X) 2))) > -> (1 3 2) > > the point is precisely that, maybe using , and ,@ is redundant in fill because of ^ But the point is that it's better to follow lisp tradional syntax, this way lispers can easy understand the meaning of code in (fill `( 1 ,x 2 )) but have to learn a new syntax to understand (fill '(1 ^ X 2)), that is another one "picolisperism" ;-)
Re: Feature request - 'fill'
Hi pd, Erik, > several lisps : > > ... > > `(1 ,(+ 2 4) 3) -> (1 8 3) > > ... > Both backquote and comma are already read-macros in picolisp, so that's a > no go > at the language level. Right. And in PicoLisp they are probably more often used than 'fill' (i.e. backquote in other Lisps). I would not want to waste a precious character like comma for fill. It is the read macro for language localization, so it precedes *every* string in an application (e.g. (ht:Prin ,"Hello"). > Alex, does the new tilde functionality mean that backquote is now > technically > redundant? I would not say so. It is needed in cases like : (1 `(list (hex "41") (hex "42")) 9) -> (1 (65 66) 9) where "~" would otherwise require one more layer of nesting $: (1 ~(list (list (hex "41") (hex "42"))) 9) -> (1 (65 66) 9) $: (1 (~(list (hex "41") (hex "42"))) 9) -> (1 (65 66) 9) But right, for simple, known, atomic values ` and ~ are equivalent now: : (1 `(hex "100") 9) -> (1 16777216 9) $: (1 ~(hex "100") 9) -> (1 16777216 9) ☺/ A!ex -- UNSUBSCRIBE: mailto:picolisp@software-lab.de?subject=Unsubscribe
