A foreach iterator for hashes / tuples / pairs

[schwern]

Instead of

for my $key (keys %hash) {
    my $value = $hash{$key};
    ....
}

I want
for my($key, $value) (%hash) {
...
}

Or something. Also working for pairs in lists. Extend it out to work for any number of elements.

[exodist]

done in Block-NamedVar

[schwern]

Its in 2.3.0_01.

I suspect this will be better served in v3 by a method and subroutine signatures with signature introspection.

@array->for( def($first, $second, $third) {
     ...
});