Re^5: Why is this auto-quoted? (-(-foo))

This could be a gotcha if you needed the + sign.

Sure, but why use the - in that case?

:) see Re: Why is this auto-quoted? (because) and perlglossary#identifier and nans, infs, and vomit

$ perl -wle " print +foo"
Unquoted string "foo" may clash with future reserved word at -e line 1
+.
Name "main::foo" used only once: possible typo at -e line 1.
print() on unopened filehandle foo at -e line 1.

$ perl -wle " print -+foo"
Unquoted string "foo" may clash with future reserved word at -e line 1
+.
-foo

$ perl -wle " print -'+foo'"
-foo

$ perl -wle " print -(-foo)"
+foo
[download]

Comment on Re^5: Why is this auto-quoted? (-(-foo)) Download Code

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Re^6: Why is this auto-quoted? (-(-foo)) by tobyink (Canon) on Jul 31, 2013 at 11:29 UTC
This also works: `$perl -wle " print - -foo " +foo` [download] The space between the two minus signs is significant; otherwise Perl thinks you're trying to decrement a constant. Also: `$perl -wle " print -+-foo " +foo $perl -wle " print +-+-foo " +foo $perl -wle " print -+-+-foo " -foo $perl -wle " print +-+-+-foo " -foo $perl -wle " print -+-+-+-foo " +foo $perl -wle " print +-+-+-+-foo " +foo` [download] ...etc `package Cow { use Moo; has name => (is => 'lazy', default => sub { 'Mooington' }) } say Cow->new->name`	[reply] [d/l] [select]
Re^6: Why is this auto-quoted? (-(-foo)) by QM (Parson) on Jul 31, 2013 at 15:54 UTC
Sure, but why use the - in that case? You may not know there is a `+` there, as in an `eval` or `"$interpolation"`. -QM -- Quantum Mechanics: The dreams stuff is made of	[reply] [d/l] [select]
Re^7: Why is this auto-quoted? (-(-foo)) by Anonymous Monk on Aug 01, 2013 at 07:59 UTC
LOL Quantum	[reply]