First, I've read perlop, thank you :)

Second, guess, You are wrong, it's not built in function: 

use 5.010;
use strict;

sub mysub($)
{
    printf "Sub called with %s\n", join '', @_;
}

sub mysub2
{
    printf "Sub2 called with %s\n", join '', @_;
}

mysub "test" eq "test";
mysub2 "test" eq "test";

[download]
mysub behaves like named unary op (because of proto i belive) and mysub2 behaves like list operator without parens.

Again, I need 100% sure explanation (not guesses) and point where I can find the list of named unary built ins without digging all the perldocs.

In reply to Re^2: Perl precedence details by hurricup
in thread Perl precedence details by hurricup

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