Split does not behave like a subroutine

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use strict;
use warnings;
...
("P1", "P2", "P3")
("P1", "P3")
("P1", "P3")

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use strict;
use warnings;
...
$rv = split( ( @par[ 0, 1 ] ) );       # NOK W1
$rv = split( map { $_ } @par );        # NOK W1
$rv = split( ( map { $_ } @par ) );    # NOK W1

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#!/usr/bin/perl -w

...
# pm_empty_list.pl:10: "a"
# pm_empty_list.pl:11: undef
# pm_empty_list.pl:13: undef

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# pm_empty_list.pl:11: undef
# pm_empty_list.pl:13: undef

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# pm_empty_list.pl:11: "a"
# pm_empty_list.pl:13: "a"

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