c:\@Work\Perl\monks>perl -wMstrict -le
"use constant [ qw(a b c d) ];
"
Invalid reference type 'ARRAY' not 'HASH' at -e line 1
BEGIN failed--compilation aborted at -e line 1.

c:\@Work\Perl\monks>perl -wMstrict -le
"use constant qw(A b c d);
 print A;
"
bcd