When the rule was originally introduced in 2001 [1] it was a total ban. It seems that the rule was slightly relaxed in 2013 [2], but I think it still massively

When the rule was originally introduced in 2001 [1] it was a total ban. It seems that the rule was slightly relaxed in 2013 [2], but I think it still massively discourages any octet >= 128 because there is no portable way to set the input encoding (like GCC `-finput-charset`, which is ignored by Clang AFAIK). [1] https://www.ioccc.org/2001/rules https://www.ioccc.org/2001/rules [2] https://www.ioccc.org/2013/rules.txt https://www.ioccc.org/2013/rules.txt