When I ran into this I came up with

BEGIN {
    *fold_case = CORE->can( 'fc' ) || CORE->can( 'lc' ) ||
        sub { lc $_[0] };
}

[download]

The explicit sub is because if you go back far enough lc() is not exposed in the CORE:: name space.

In reply to Re: Perl version dependent code by Anonymous Monk
in thread Perl version dependent code by Wyrdweaver

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