Timeline for Make your language unusable
Current License: CC BY-SA 3.0
15 events
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| Apr 23, 2017 at 17:58 | comment | added | wizzwizz4 |
@IwillnotexistIdonotexist No, the inserted code is user-defined. See the PHP answer below: // insert program here.
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| Apr 23, 2017 at 17:39 | comment | added | Iwillnotexist Idonotexist |
@wizzwizz4 But the rules say "The inserted code must be actually executed, in a way it is supposed to satisfy the criteria.". The inserted code is \catcode13=9% and really is executed. It's not akin to commenting // or /* in C & C++ because neither continues ad infinitum (/* is closed by the next */ so it doesn't make the language useless), and \n in the source files of those languages cannot be reconsidered as a normal character. Only TeX allows this sort of control over the lexer system, enabling this hack.
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| Apr 23, 2017 at 17:20 | comment | added | wizzwizz4 | @IwillnotexistIdonotexist That wouldn't be a valid submission because it creates an infinite comment, and comments aren't code so aren't "executed". | |
| Apr 13, 2017 at 12:39 | history | edited | CommunityBot |
replaced http://codegolf.stackexchange.com/ with https://codegolf.stackexchange.com/
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| Jun 18, 2016 at 19:13 | history | edited | Cephalopod | CC BY-SA 3.0 |
added 111 characters in body
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| Jan 24, 2016 at 13:47 | history | edited | Cephalopod | CC BY-SA 3.0 |
added 333 characters in body
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| Jan 23, 2016 at 23:03 | comment | added | Iwillnotexist Idonotexist |
+1. I just started teaching myself out of the TeXBook and when I realized \catcode13=9% would completely break the language (Everything after % is commented and newlines (ASCII char 13) are ignored, so the comment extends to infinity) I wanted to post it here. But you have a slightly longer command already in here.
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| Oct 26, 2015 at 19:23 | comment | added | Cephalopod | @smpl Hmm, I see. Very clever. | |
| Oct 26, 2015 at 14:48 | comment | added | user530873 |
@Cephalopod \fi is a TeX primitive. And no you can't redefine anything at this point, \iffalse has been called.
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| Oct 26, 2015 at 12:07 | comment | added | Cephalopod |
@smpl you can still redefine \fi to its original meaning, right? Thus the language is not broken beyond any repair.
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| Oct 26, 2015 at 0:12 | comment | added | user530873 |
A better version: \def\fi{}\iffalse. I can't post answers on this because it requires at least 10 rep earned from this site, but this will not allow output anymore too.
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| Oct 24, 2015 at 18:33 | comment | added | Cephalopod | It is no longer possible to produce different outputs. Thus, per definition in the question, the language is broken. | |
| Oct 23, 2015 at 17:35 | comment | added | yo' | Well, you can still output anything. Appending 20 paragraphs of Lorem Ipsum to your code, I get about 7 pages of nicely typeset text. The problem is that I have to kill it; but still, the DVI file is already shipped, at least partially. | |
| Oct 23, 2015 at 7:20 | comment | added | user530873 | Only true for formats that use \ as the only character in category 0, but glad to see TeX represented here! :) | |
| Oct 19, 2015 at 19:50 | history | answered | Cephalopod | CC BY-SA 3.0 |