On Mon, Oct 31, 2016 at 10:19:58AM +0900, Stephen J. Turnbull wrote:
Steven D'Aprano writes:
I see that Perl is leading the way here, supporting a large number of Unicode symbols:
In what sense is that "support"?
In the sense that Perl 6 not only allows Unicode identifiers (as Python has for many years) but also Unicode operators and symbols. For example, you can use either the Unicode character ⊂ \N{SUBSET OF} or the ASCII trigraph (<) for doing subset tests.
I must say that it is kinda cute that Perl6 does the right thing for x².
Uh, as far as I can tell from that page, Perl has absolutely nothing to do with that. You enter the Unicode code point as hex, and if the font supports, you get the character.
You missed the bit that Parl 6 interprets "x²" in code as the equivalent of x**2 (x squared). In other words, ² behaves as a unary postfix operator that squares its argument. Likewise for ³, etc. You can even combine them: x³³ would be the same as x**33. There's more here: https://docs.perl6.org/language/unicode_texas -- Steve