In case of -e it's the -e switch that "consumes" the double-dash, signaling "end of perl options". You may use a second double-dash to separate the script's argument from its options. 

$ perl -s -e 'print join ":", $0, $R, @ARGV' -- -R=OK
-e:OK
$ perl -s -e 'print join ":", $0, $R, @ARGV' -- -- -R=OK
-e::-R=OK

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Update

After re-reading, I dislike my wording. It is not the -e switch consuming the double-dash, it is perl command itself.

Greetings,
🐻

$gryYup$d0ylprbpriprrYpkJl2xyl~rzg??P~5lp2hyl0p$

In reply to Re: perlrun doc inaccurate on -s switch by jo37
in thread perlrun doc inaccurate on -s switch by Discipulus

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