Dear wise monks.
I have stumbled over a piece of code that uses a syntax like < a b c > to specify a list of values, like in 
$ perl -we 'print "$_\n" for < a b c >;'
a
b
c

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or 
my $array_ref = [< 1 2 3 4 5 >];

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Playing around with it a bit, I found out that even things like 

use Data::Dump < pp >;

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seem to work (as long as what is inside the angle brackets does not look too much like a file handle).

It seems like < ... > works a lot like qw(...) in that there are no commas needed to separate the parts, but also a bit like qq(...) (or plain "...") in that variables are substituted. Like in this example: 

$ perl -we 'use Data::Dump < pp >; $x="foo"; pp <a 2 $x b>;'
("a", 2, "foo", "b")

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I am wondering why I have never seen this syntax in any literature (or do I just get old and forget things?).
I would therefore like to ask for enlightenment about where to find any documentation about this syntax.
(A pointer to a relevant section of https://perldoc.perl.org/ would be much admired!).

Thank you for your help!

In reply to Can't find any documentation on < a b c > syntax for lists by muthm

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