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prefix notation and () on newRPL project
01-21-2019, 07:40 PM (This post was last modified: 01-21-2019 08:24 PM by Albert Chan.)
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RE: prefix notation and () on newRPL project
(01-21-2019 05:06 PM)compsystems Wrote:  ◉ Observing the u_LISP project that has a notation similar to the prefix notation, and that the R-PN is a inverse prefix.
So I "think" it's easy to add a second type of operation engine PN/prefix ("eliminate" the Reverse) or consult it in this community if they are involved in this type of notation in your project.

Infix or rpn macro is not hard, but you are better off stay with lisp syntax.
It does not take much time to get used to (* (+ 3 4) (- 5 6))

BTW, does u-lisp support macro ?

Quote:◉ A second idea, RPN with parentheses, this gives a faster interpretation of the source code
The importance of the use of parentheses is that each operator can operate on n arguments (a,b,c)+ (a,b,c,d,e)-

It might not run faster.
I never tried u-lisp, but with Chez scheme 7.4d, (+ a b c) is slower than (+ (+ a b) c)

Above assumed a,b,c are variables. With numbers, both form optimized to a single number.
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RE: prefix notation and () on newRPL project - Albert Chan - 01-21-2019 07:40 PM

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