Commit | Line | Data |
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c963b151 BD |
1 | #!./perl |
2 | ||
3 | # Test // and friends. | |
4 | ||
5 | BEGIN { | |
6 | chdir 't' if -d 't'; | |
7 | @INC = '../lib'; | |
8 | } | |
9 | ||
10 | package main; | |
11 | require './test.pl'; | |
12 | ||
e45d8982 | 13 | plan( tests => 34 ); |
c963b151 BD |
14 | |
15 | my($x); | |
16 | ||
17 | $x=1; | |
18 | is($x // 0, 1, ' // : left-hand operand defined'); | |
19 | ||
20 | $x = undef; | |
21 | is($x // 1, 1, ' // : left-hand operand undef'); | |
22 | ||
23 | $x=''; | |
24 | is($x // 0, '', ' // : left-hand operand defined but empty'); | |
25 | ||
1c2e8cca | 26 | like([] // 0, qr/^ARRAY/, ' // : left-hand operand a reference'); |
121d9cec | 27 | |
c963b151 BD |
28 | $x=undef; |
29 | $x //= 1; | |
30 | is($x, 1, ' //=: left-hand operand undefined'); | |
31 | ||
32 | $x //= 0; | |
121d9cec | 33 | is($x, 1, '//=: left-hand operand defined'); |
c963b151 BD |
34 | |
35 | $x = ''; | |
36 | $x //= 0; | |
121d9cec | 37 | is($x, '', '//=: left-hand operand defined but empty'); |
6f33ba73 RGS |
38 | |
39 | @ARGV = (undef, 0, 3); | |
40 | is(shift // 7, 7, 'shift // ... works'); | |
41 | is(shift() // 7, 0, 'shift() // ... works'); | |
42 | is(shift @ARGV // 7, 3, 'shift @array // ... works'); | |
43 | ||
44 | @ARGV = (3, 0, undef); | |
45 | is(pop // 7, 7, 'pop // ... works'); | |
46 | is(pop() // 7, 0, 'pop() // ... works'); | |
47 | is(pop @ARGV // 7, 3, 'pop @array // ... works'); | |
48 | ||
49 | # Test that various syntaxes are allowed | |
50 | ||
51 | for (qw(getc pos readline readlink undef umask <> <FOO> <$foo> -f)) { | |
52 | eval "sub { $_ // 0 }"; | |
53 | is($@, '', "$_ // ... compiles"); | |
54 | } | |
7ce6e6b9 RGS |
55 | |
56 | # Test for some ambiguous syntaxes | |
57 | ||
58 | eval q# sub f ($) { } f $x / 2; #; | |
7245301c | 59 | is( $@, '', "'/' correctly parsed as arithmetic operator" ); |
7ce6e6b9 | 60 | eval q# sub f ($):lvalue { $y } f $x /= 2; #; |
7245301c | 61 | is( $@, '', "'/=' correctly parsed as assigment operator" ); |
7ce6e6b9 | 62 | eval q# sub f ($) { } f $x /2; #; |
7245301c JK |
63 | like( $@, qr/^Search pattern not terminated/, |
64 | "Caught unterminated search pattern error message: empty subroutine" ); | |
7ce6e6b9 | 65 | eval q# sub { print $fh / 2 } #; |
7245301c JK |
66 | is( $@, '', |
67 | "'/' correctly parsed as arithmetic operator in sub with built-in function" ); | |
7ce6e6b9 | 68 | eval q# sub { print $fh /2 } #; |
7245301c JK |
69 | like( $@, qr/^Search pattern not terminated/, |
70 | "Caught unterminated search pattern error message: sub with built-in function" ); | |
75cc09e4 MHM |
71 | |
72 | # [perl #28123] Perl optimizes // away incorrectly | |
73 | ||
74 | is(0 // 2, 0, ' // : left-hand operand not optimized away'); | |
75 | is('' // 2, '', ' // : left-hand operand not optimized away'); | |
76 | is(undef // 2, 2, ' // : left-hand operand optimized away'); | |
e45d8982 MH |
77 | |
78 | # Test that OP_DORs other branch isn't run when arg is defined | |
79 | # // returns the value if its defined, and we must test its | |
80 | # truthness after | |
81 | my $x = 0; | |
82 | my $y = 0; | |
83 | ||
84 | $x // 1 and $y = 1; | |
85 | is($y, 0, 'y is still 0 after "$x // 1 and $y = 1"'); | |
86 | ||
87 | $y = 0; | |
88 | # $x is defined, so its value 0 is returned to the if block | |
89 | # and the block is skipped | |
90 | if ($x // 1) { | |
91 | $y = 1; | |
92 | } | |
93 | is($y, 0, 'if ($x // 1) exited out early since $x is defined and 0'); | |
94 | ||
95 | # This is actually (($x // $z) || 'cat'), so 0 from first dor | |
96 | # evaluates false, we should see 'cat'. | |
97 | $y = undef; | |
98 | ||
99 | $y = $x // $z || 'cat'; | |
100 | is($y, 'cat', 'chained or/dor behaves correctly'); |