Dear Monks

it's never been quite clear to me how to get full -E behavior with a stdin script. Let's call perl from a shell script (this the reason for not wanting -E, and some other choices):

perl -Mv5.12 -wn -- - /etc/passwd <<'EOF'
next unless / ([^:]*) : [^:]* : ([0-9]+) /x;
my ($w, $n) = (uc $1, 5000 + $2);
say qq{log=$w id=$n}
EOF
[download]

As I understand it, -E turns on optionals (e.g. say, <<>>), but also some behaviors (e.g. use strict, Unicode handling). Now the unpalatable choices become

• specify a "minimal minimum" version (e.g. -Mv.5.12) to get say and strict; but that probably disables post-5.12 changes
• specify a "maximal minimum" version (e.g. -Mv5.28), but that fails for older Perls
• use -E with an inline single- / double-quoted shell string, with all the niceties of shell quoting / escaping
• use -E with a wastefull -E "$(cat <<"EOF" ... )"

Are there any other options to get -E behavior without -E?

---

---

Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!

Titles consisting of a single word are discouraged, and in most cases are disallowed outright.

Read Where should I post X? if you're not absolutely sure you're posting in the right place.

Please read these before you post! —

• How do I compose an effective node title?
• How do I post a question effectively?
• Markup in the Monastery

Posts may use any of the Perl Monks Approved HTML tags:

a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr

You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)

	For:		Use:
	&		&
	<		&lt;
	>		&gt;
	[		&#91;
	]		&#93;

Link using PerlMonks shortcuts! What shortcuts can I use for linking?

See Writeup Formatting Tips and other pages linked from there for more info.