This is in open.pm:

        if ($type =~ /^:?(utf8|locale|encoding\(.+\))$/) {
            $type = 'IO';
            $dscp = ":$1";
        } elsif ($type eq ':std') {
            $std = 1;
            next;
        }

[download]

… so that explains why ':std' needs the colon.

toby döt ink

In reply to Re: Colons in names of IO layers by tobyink
in thread Colons in names of IO layers by vr

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