<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <meta content="text/html; charset=UTF-8" http-equiv="Content-Type"> </head> <body bgcolor="#ffffff" text="#000000"> Better names for the preferences could be #disabled, #st80, #ansiSmalltalk. Default could be #st80 (meaning `1@-2` answers the same Point as `1 @ (-2)`. If nobody disagrees strongly, I guess I'll push it like that, using Hilaire's new PreferenceNG. Thanks! On 5/13/2022 3:32 PM, Juan Vuletich via Cuis-dev wrote: <blockquote cite="mid:627EA44A.5000007@zoho.com" type="cite"> <meta http-equiv="Context-Type" content="text/html; charset=UTF-8"> <title></title> On 5/13/2022 1:41 PM, Nicolas Cellier via Cuis-dev wrote: <blockquote cite="mid:CAKnRiT7sbZV6JE3BuVx-UfO0EcbVtWqSzJ=eyoa+B1Eeaf=99w@mail.gmail.com" type="cite"> <div>So we did not have to introduce the @- selectors & co... </div> </blockquote> Given the path followed by Squeak and Pharo, and what ANSI Smalltalk says, and the preferences several of you just said, the attach is my proposal. It adds a new preference #atMinusDigitMeaning. Possible values are: #disabled, #negativeNumberParameter and #atMinusSelector. It doesn't only control '@-', but any binary selector ending in $-, with size > 1. The question is what to use as a default value. ST-80 and Squeak go with #negativeNumberParameter. ANSI Smalltalk and Pharo do #atMinusSelector. #disabled is also a reasonable alternative, helping programmers understand a smell in their code. Thanks, <pre>-- Juan Vuletich <a moz-do-not-send="true" href="http://www.cuis-smalltalk.org">www.cuis-smalltalk.org</a> <a moz-do-not-send="true" href="https://github.com/Cuis-Smalltalk/Cuis-Smalltalk-Dev">https://github.com/Cuis-Smalltalk/Cuis-Smalltalk-Dev</a> <a moz-do-not-send="true" href="https://github.com/jvuletich">https://github.com/jvuletich</a> <a moz-do-not-send="true" href="https://www.linkedin.com/in/juan-vuletich-75611b3">https://www.linkedin.com/in/juan-vuletich-75611b3</a> <a moz-do-not-send="true" href="https://independent.academia.edu/JuanVuletich">https://independent.academia.edu/JuanVuletich</a> <a moz-do-not-send="true" href="https://www.researchgate.net/profile/Juan-Vuletich">https://www.researchgate.net/profile/Juan-Vuletich</a> <a moz-do-not-send="true" href="https://patents.justia.com/inventor/juan-manuel-vuletich">https://patents.justia.com/inventor/juan-manuel-vuletich</a> <a moz-do-not-send="true" href="https://twitter.com/JuanVuletich">https://twitter.com/JuanVuletich</a></pre> </blockquote> <pre class="moz-signature" cols="72">-- Juan Vuletich <a class="moz-txt-link-abbreviated" href="http://www.cuis-smalltalk.org">www.cuis-smalltalk.org</a> <a class="moz-txt-link-freetext" href="https://github.com/Cuis-Smalltalk/Cuis-Smalltalk-Dev">https://github.com/Cuis-Smalltalk/Cuis-Smalltalk-Dev</a> <a class="moz-txt-link-freetext" href="https://github.com/jvuletich">https://github.com/jvuletich</a> <a class="moz-txt-link-freetext" href="https://www.linkedin.com/in/juan-vuletich-75611b3">https://www.linkedin.com/in/juan-vuletich-75611b3</a> <a class="moz-txt-link-freetext" href="https://independent.academia.edu/JuanVuletich">https://independent.academia.edu/JuanVuletich</a> <a class="moz-txt-link-freetext" href="https://www.researchgate.net/profile/Juan-Vuletich">https://www.researchgate.net/profile/Juan-Vuletich</a> <a class="moz-txt-link-freetext" href="https://patents.justia.com/inventor/juan-manuel-vuletich">https://patents.justia.com/inventor/juan-manuel-vuletich</a> <a class="moz-txt-link-freetext" href="https://twitter.com/JuanVuletich">https://twitter.com/JuanVuletich</a></pre> </body> </html>