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Infix to postif notation for ESP32forth

From Marc Petremann@21:1/5 to All on Thu Oct 20 06:20:23 2022

See here: https://www.reddit.com/r/ESP32forth/comments/y8y30m/convert_infix_to_postfix_notation_for_esp32forth/
BR

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From minforth@arcor.de@21:1/5 to mpetre...@gmail.com on Thu Oct 20 08:19:42 2022

mpetre...@gmail.com schrieb am Donnerstag, 20. Oktober 2022 um 15:20:24 UTC+2:

See here: https://www.reddit.com/r/ESP32forth/comments/y8y30m/convert_infix_to_postfix_notation_for_esp32forth/

See also Julian Noble's formula translator: https://galileo.phys.virginia.edu/classes/551.jvn.fall01/ftran202.htm

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From dxforth@21:1/5 to minf...@arcor.de on Fri Oct 21 11:54:03 2022

On 21/10/2022 2:19 am, minf...@arcor.de wrote:

mpetre...@gmail.com schrieb am Donnerstag, 20. Oktober 2022 um 15:20:24 UTC+2:

See here:
https://www.reddit.com/r/ESP32forth/comments/y8y30m/convert_infix_to_postfix_notation_for_esp32forth/

See also Julian Noble's formula translator: https://galileo.phys.virginia.edu/classes/551.jvn.fall01/ftran202.htm

There was also one for integers but not as well-known or developed:

FD 15/3 INTRAN - An Integer Formula Translator - Noble J.

Whether automated conversion is warranted is debatable. One can see how
it might appeal to those unfamiliar with forth. JVN was preaching to
fellow scientists after all.

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From Marc Petremann@21:1/5 to All on Fri Oct 21 07:45:27 2022

Le jeudi 20 octobre 2022 à 17:19:43 UTC+2, minf...@arcor.de a écrit :

mpetre...@gmail.com schrieb am Donnerstag, 20. Oktober 2022 um 15:20:24 UTC+2:

See here: https://www.reddit.com/r/ESP32forth/comments/y8y30m/convert_infix_to_postfix_notation_for_esp32forth/

See also Julian Noble's formula translator: https://galileo.phys.virginia.edu/classes/551.jvn.fall01/ftran202.htm

The JVN article is from 2004
The code originally used by me is from 1986 for TURBO-Forth MS-DOS 3.x
I have a gForth adapted version here: https://github.com/MPETREMANN11/gFORTH/blob/master/infix.txt
My code has the advantage of being quite short and understandable.
I just adapted it for ESP32Forth, because it can help developers to handle quite long arithmetic and logic formulas. Yes, you can mix arithmetic and logical operators. A very good example here:
https://esp32.arduino-forth.com/article/tools_infixToPostfix#progLin
Final result with no if..else..then: https://esp32.arduino-forth.com/articles/images/tools/infixToPostfix/infixGraph.png

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