On Friday, 26 July 2013 at 05:06:45 UTC, Jonathan M Davis wrote:
Unicode contains ASCII, but very few Unicode characters are
ASCII, because
there just aren't very many ASCII characters and there and a
_ton_ of Unicode
characters. The std.ascii functions return true for certain
sets of ASCII
characters and false for everything else. The std.uni functions
return true
for many Unicode characters as well. You wouldn't normally use
std.ascii if
you're operating on non-ASCII Unicode characters, but it
ignores them if it
does run into them.
std.ascii.isWhite only cares about ASCII whitespace, which the
documentation
explicitly lists as the space, tab, vertical tab, form feed,
carriage return,
and linefeed characters. Those characters will return true. All
other
characters will return false.
std.uni.isWhite returns true for all of the characters that
std.ascii.isWhite
does plus a whole bunch of other non-ASCII characters that the
Unicode
standard considers to be whitespace.
Which function you use depends on what you're trying to do.
- Jonathan M Davis
That makes sense. I know that the first 127 unicode characters
are equivalent to the 7-bit ASCII charset, but it confused me
that the module is named std.ascii when it actually operates on
unicode characters, I guess.
Another question, I'm not all that familiar with unicode, so what
is the difference between std.uni.isNumber and
std.ascii.isNumber? Am I right in thinking that std.uni.isNumber
will match things outside of the basic 0..9?
