At Sun, 24 Nov 2019 14:30:23 -0800 (PST), Jonathan Simpson wrote: > > > The documentation for char=? leaves the impression that it takes a minimum > of two arguments: > > > https://docs.racket-lang.org/reference/characters.html?q=expand#%28def._%28%28q > uote._~23~25kernel%29._char~3d~3f%29%29 >
In the documentation, "..." means "zero or more". So, (char=? char1 char2 ...) means that `char=?` takes at least one argument. Before version 7, the "..." in this place in documentation was a "...+", which means "one or more" in the documentation's notation. The most immediate reason for the change in v7.0 is pretty shallow: `char=?` and similar functions in Chez Scheme allow a single argument, and adjusting Racket's functions was the easiest way to resolve a mismatch between traditional Racket and Racket on Chez Scheme. -- You received this message because you are subscribed to the Google Groups "Racket Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/racket-users/5ddbbeae.1c69fb81.8926a.2d04SMTPIN_ADDED_MISSING%40gmr-mx.google.com.
