BEGIN {
chdir 't' if -d 't';
- @INC = '../lib';
+ require './test.pl';
+ set_up_inc('../lib');
}
use warnings ;
-no warnings 'deprecated';
$a = 'abcdefxyz';
$SIG{__WARN__} = sub {
}
};
-require './test.pl';
-
-plan(334);
+plan(388);
run_tests() unless caller;
like ($@, $FATAL_MSG);
is(substr($a,0,-6), 'abc'); # P=Q R S
is(substr($a,-3,1), 'x'); # P Q R S
-
-$[ = 1;
-
-is(substr($a,1,3), 'abc' ); # P=Q R S
-is(substr($a,4,3), 'def' ); # P Q R S
-is(substr($a,7,999), 'xyz');# P Q S R
-$b = substr($a,999,999) ; # warn # P R Q S
-is($w--, 1);
-eval{substr($a,999,999) = "" ; } ; # P R Q S
-like ($@, $FATAL_MSG);
-is(substr($a,1,-6), 'abc' );# P=Q R S
-is(substr($a,-3,1), 'x' ); # P Q R S
-
-$[ = 0;
+sub{$b = shift}->(substr($a,999,999));
+is ($w--, 1, 'boundless lvalue substr only warns on fetch');
substr($a,3,3) = 'XYZ';
is($a, 'abcXYZxyz' );
eval{substr($a,1) = "" ; }; # P=R=S Q
like($@, $FATAL_MSG);
+$b = substr($a,-7,-6) ; # warn # Q R P S
+is($w--, 1);
+eval{substr($a,-7,-6) = "" ; }; # Q R P S
+like($@, $FATAL_MSG);
+
my $a = 'zxcvbnm';
substr($a,2,0) = '';
is($a, 'zxcvbnm');
is($_, 'YYYY');
is($x, 'aYYYYef');
}
+ $x = "abcdef";
+ for (substr($x,1)) {
+ is($_, 'bcdef');
+ $_ = 'XX';
+ is($_, 'XX');
+ is($x, 'aXX');
+ $x .= "frompswiggle";
+ is $_, "XXfrompswiggle";
+ }
+ $x = "abcdef";
+ for (substr($x,1,-1)) {
+ is($_, 'bcde');
+ $_ = 'XX';
+ is($_, 'XX');
+ is($x, 'aXXf');
+ $x .= "frompswiggle";
+ is $_, "XXffrompswiggl";
+ }
+ $x = "abcdef";
+ for (substr($x,-5,3)) {
+ is($_, 'bcd');
+ $_ = 'XX'; # now $_ is substr($x, -4, 2)
+ is($_, 'XX');
+ is($x, 'aXXef');
+ $x .= "frompswiggle";
+ is $_, "gg";
+ }
+ $x = "abcdef";
+ for (substr($x,-5)) {
+ is($_, 'bcdef');
+ $_ = 'XX'; # now substr($x, -2)
+ is($_, 'XX');
+ is($x, 'aXX');
+ $x .= "frompswiggle";
+ is $_, "le";
+ }
+ $x = "abcdef";
+ for (substr($x,-5,-1)) {
+ is($_, 'bcde');
+ $_ = 'XX'; # now substr($x, -3, -1)
+ is($_, 'XX');
+ is($x, 'aXXf');
+ $x .= "frompswiggle";
+ is $_, "gl";
+ }
+}
+
+# Also part of perl #24346; scalar(substr...) should not affect lvalueness
+{
+ my $str = "abcdef";
+ sub { $_[0] = 'dea' }->( scalar substr $str, 3, 2 );
+ is $str, 'abcdeaf', 'scalar does not affect lvalueness of substr';
}
# [perl #24200] string corruption with lvalue sub
# [perl #23765]
{
my $a = pack("C", 0xbf);
+ no warnings 'deprecated';
substr($a, -1) &= chr(0xfeff);
is($a, "\xbf");
}
is(substr($a,1,1), 'b');
}
+# [perl #62646] offsets exceeding 32 bits on 64-bit system
+SKIP: {
+ skip("32-bit system", 24) unless ~0 > 0xffffffff;
+ my $a = "abc";
+ my $s;
+ my $r;
+
+ utf8::downgrade($a);
+ for (1..2) {
+ $w = 0;
+ $r = substr($a, 0xffffffff, 1);
+ is($r, undef);
+ is($w, 1);
+
+ $w = 0;
+ $r = substr($a, 0xffffffff+1, 1);
+ is($r, undef);
+ is($w, 1);
+
+ $w = 0;
+ ok( !eval { $r = substr($s=$a, 0xffffffff, 1, "_"); 1 } );
+ is($r, undef);
+ is($s, $a);
+ is($w, 0);
+
+ $w = 0;
+ ok( !eval { $r = substr($s=$a, 0xffffffff+1, 1, "_"); 1 } );
+ is($r, undef);
+ is($s, $a);
+ is($w, 0);
+
+ utf8::upgrade($a);
+ }
+}
+
+# [perl #77692] UTF8 cache not being reset when TARG is reused
+ok eval {
+ local ${^UTF8CACHE} = -1;
+ for my $i (0..1)
+ {
+ my $dummy = length(substr("\x{100}",0,$i));
+ }
+ 1
+}, 'UTF8 cache is reset when TARG is reused [perl #77692]';
+
+{
+ use utf8;
+ use open qw( :utf8 :std );
+ no warnings 'once';
+
+ my $t = "";
+ substr $t, 0, 0, *ワルド;
+ is($t, "*main::ワルド", "substr works on UTF-8 globs");
+
+ $t = "The World!";
+ substr $t, 0, 9, *ザ::ワルド;
+ is($t, "*ザ::ワルド!", "substr works on a UTF-8 glob + stash");
+}
+
+{
+ my $x = *foo;
+ my $y = \substr *foo, 0, 0;
+ is ref \$x, 'GLOB', '\substr does not coerce its glob arg just yet';
+ $x = \"foo";
+ $y = \substr *foo, 0, 0;
+ is ref \$x, 'REF', '\substr does not coerce its ref arg just yet';
+}
+
+# Test that UTF8-ness of magic var changing does not confuse substr lvalue
+# assignment.
+# We use overloading for our magic var, but a typeglob would work, too.
+package o {
+ use overload '""' => sub { ++our $count; $_[0][0] }
+}
+my $refee = bless ["\x{100}a"], o::;
+my $substr = \substr $refee, -2; # UTF8 flag still off for $$substr.
+$$substr = "b"; # UTF8 flag turns on when setsubstr
+is $refee, "b", # magic stringifies $$substr.
+ 'substr lvalue assignment when stringification turns on UTF8ness';
+
+# Test that changing UTF8-ness does not confuse 4-arg substr.
+$refee = bless [], "\x{100}a";
+# stringify without returning on UTF8 flag on $refee:
+my $string = $refee; $string = "$string";
+substr $refee, 0, 0, "\xff";
+is $refee, "\xff$string",
+ '4-arg substr with target UTF8ness turning on when stringified';
+$refee = bless [], "\x{100}";
+() = "$refee"; # UTF8 flag now on
+bless $refee, "\xff";
+$string = $refee; $string = "$string";
+substr $refee, 0, 0, "\xff";
+is $refee, "\xff$string",
+ '4-arg substr with target UTF8ness turning off when stringified';
+
+# Overload count
+$refee = bless ["foo"], o::;
+$o::count = 0;
+substr $refee, 0, 0, "";
+is $o::count, 1, '4-arg substr calls overloading once on the target';
+$refee = bless ["\x{100}"], o::;
+() = "$refee"; # turn UTF8 flag on
+$o::count = 0;
+() = substr $refee, 0;
+is $o::count, 1, 'rvalue substr calls overloading once on utf8 target';
+$o::count = 0;
+$refee = "";
+${\substr $refee, 0} = bless ["\x{100}"], o::;
+is $o::count, 1, 'assigning utf8 overload to substr lvalue calls ovld 1ce';
+
+# [perl #7678] core dump with substr reference and localisation
+{$b="abcde"; local $k; *k=\substr($b, 2, 1);}
+
+} # sub run_tests - put tests above this line that can run in threads
+
+
+my $destroyed;
+{ package Class; DESTROY { ++$destroyed; } }
+
+$destroyed = 0;
+{
+ my $x = '';
+ substr($x,0,1) = "";
+ $x = bless({}, 'Class');
+}
+is($destroyed, 1, 'Timely scalar destruction with lvalue substr');
+
+{
+ my $result_3363;
+ sub a_3363 {
+ my ($word, $replace) = @_;
+ my $ref = \substr($word, 0, 1);
+ $$ref = $replace;
+ if ($replace eq "b") {
+ $result_3363 = $word;
+ } else {
+ a_3363($word, "b");
+ }
+ }
+ a_3363($_, "v") for "test";
+
+ is($result_3363, "best", "ref-to-substr retains lvalue-ness under recursion [perl #3363]");
}
https://perl5.git.perl.org / perl5.git / blobdiff