(1) that's still not the correct sort order
(á should come before à)
I've no idea, but
this page
indicates the opposite. You may have to
create a custom sort to override the default if desired.
(2) I actually get a
different "sorted" list when I run the same exact code. This is the
problem that I have - it seems the sort algorithms ignore the tone
marks.
Perhaps it has to do with normalization. I still get the same sort
order when using it.
#!/usr/bin/env perl
use v5.14;
use warnings;
use utf8::all;
use Unicode::Collate::Locale;
use Unicode::Normalize;
my $Collator = Unicode::Collate::Locale->new(locale =>'vi');
my @unsorted = ('á', 'ả', 'ã', 'à', 'ậ', 'ă', 'ạ', 'ẫ', 'a', 'ẩ' );
@unsorted = map { NFD($_) } @unsorted;
my @sorted = $Collator->sort(@unsorted);
say NFC("unsorted\n@unsorted");
say NFC("sorted\n@sorted");
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