Well... I never ever see comparison routines in the form

• sort my_comp LIST

used.

If you really need a special sort it's normally far easier to write

• sub my_sort { sort {...} @_ }

They are useful when combining them in multi_sorts with other comparisons, like ...

• sort { my_comp or $a cmp $b } LIST

... , but in this case you are always free to surround single my_comps with curlies.

• sort { my_comp } LIST

I'd say this syntax should be deprecated.

(Unless someone could show me useful applications)

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