17 is( join(':', %a[0,1,2]), '0:a:1:b:2:c', "correct result and order");
18 is( join(':', %a[2,1,0]), '2:c:1:b:0:a', "correct result and order");
19 is( join(':', %a[1,0,2]), '1:b:0:a:2:c', "correct result and order");
21 ok( eq_hash( { %a[5,6] }, { 5 => 'f', 6 => 'g' } ), "correct hash" );
23 is( join(':', %a[()]), '', "correct result for empty slice");
26 # not existing elements
29 ok( eq_hash( { %a[3..4] }, { 3 => 'd', 4 => undef } ),
30 "not existing returned with undef value" );
32 ok( !exists $a[5], "no autovivification" );
39 ok eq_array( \@a, [ (1 => 'b') x 3 ]), "repetead keys end with repeated results";
45 local $SIG{__WARN__} = sub {push @warn, "@_"};
48 is eval'scalar %a[4,5,6]', 'g', 'last element in scalar context';
51 qr/^\%a\[\.\.\.\] in scalar context better written as \$a\[\.\.\.\]/);
53 eval 'is( scalar %a[5], "f", "correct value");';
56 like ($warn[1], qr/^\%a\[5\] in scalar context better written as \$a\[5\]/);
64 is( join(':', map {$_//'undef'} @t), '1:b:2:undef', "correct result");
65 ok( eq_array( \@a, ['a', 'b'] ), "correct array" );
72 is( join(':', %$a[2,3,4]), '2:c:3:d:4:e', "correct result and order");
73 is( join(':', %{$a}[2,3,4]), '2:c:3:d:4:e', "correct result and order");
79 is( "%a[1,2]", q{%a[1,2]}, 'no interpolation within strings' );
82 # ref of a slice produces list
88 $ok = 0 if grep !ref, @tmp;
89 ok $ok, "all elements are refs";
91 is join( ':', map{ $$_ } @tmp ), '2:c:3:d:4:e';
94 # lvalue usage in foreach
99 ok( eq_array( \@a, [0,2,2,4] ), "correct array" );
100 ok( eq_array( \@i, [1,3] ), "indexes not touched" );
103 # lvalue subs in foreach
107 sub foo:lvalue{ %a[@i] };
109 ok( eq_array( \@a, [0,2,2,4] ), "correct array" );
110 ok( eq_array( \@i, [1,3] ), "indexes not touched" );
119 eval 'local %a[1,2]';
120 like $@, qr{^Can't modify index/value array slice in local at},
126 eval 'delete %a[1,2]';
127 like $@, qr{^delete argument is index/value array slice, use array slice},
133 eval '%a[1,2] = qw(B A)';
134 like $@, qr{^Can't modify index/value array slice in list assignment},
137 # lvalue subs in assignment
140 eval 'sub bar:lvalue{ %a[1,2] }; bar() = "1"';
141 like $@, qr{^Can't modify index/value array slice in list assignment},
142 'not allowed as result of lvalue sub';
149 local $SIG{__WARN__} = sub {push @warn, "@_"};
154 my $v = eval '%a[0]';
155 is (scalar @warn, 1, 'warning in scalar context');
157 qr{^%a\[0\] in scalar context better written as \$a\[0\]},
158 "correct warning text";
162 my ($k,$v) = eval '%a[0]';
165 is (scalar @warn, 0, 'no warning in list context');
169 # simple case with tied
172 tie my @a, 'Tie::StdArray';
175 ok( eq_array( [%a[1,2, 3]], [qw(1 b 2 c 3), undef] ),
178 ok( !exists $a[3], "no autovivification" );
181 # keys/value/each treat argument as scalar
185 no warnings 'syntax', 'experimental::autoderef';
186 my ($k,$v) = each %i[0];
187 is $k, 'a', 'key returned by each %array[ix]';
188 is $v, 'b', 'val returned by each %array[ix]';
190 is join('-', sort keys %i[(0)]), '1-3-5-7-9', 'keys %array[ix]';
191 is join('-', sort values %i[(0)]), '10-2-4-6-8', 'values %array[ix]';
194 # \% prototype expects hash deref
195 sub nowt_but_hash(\%) {}
196 eval 'nowt_but_hash %_[0]';
197 like $@, qr`^Type of arg 1 to main::nowt_but_hash must be hash \(not(?x:
198 ) index/value array slice\) at `,