regcomp.c: Rename a variable

[perl5.git] / t / op / gmagic.t

diff --git a/t/op/gmagic.t b/t/op/gmagic.t
index 1226e3a..0c85955 100644 (file)
--- a/t/op/gmagic.t
+++ b/t/op/gmagic.t
@@ -62,22 +62,16 @@ chomp $c;
 expected_tie_calls(tied $c, 1, 2, 'chomping a ref');
 
 {
+    no warnings 'once'; # main::foo
     my $outfile = tempfile();
     open my $h, ">$outfile" or die  "$0 cannot close $outfile: $!";
+    binmode $h;
     print $h "bar\n";
     close $h or die "$0 cannot close $outfile: $!";    
 
     $c = *foo;                                         # 1 write
     open $h, $outfile;
-    sysread $h, $c, 3, 7;                              # 1 read; 1 write
-    is $c, "*main::bar", 'what sysread wrote';         # 1 read
-    expected_tie_calls(tied $c, 2, 2, 'calling sysread with tied buf');
-    close $h or die "$0 cannot close $outfile: $!";
-
- # Do this again, with a utf8 handle
-    $c = *foo;                                         # 1 write
-    open $h, "<:utf8", $outfile;
-    no warnings 'deprecated';
+    binmode $h;
     sysread $h, $c, 3, 7;                              # 1 read; 1 write
     is $c, "*main::bar", 'what sysread wrote';         # 1 read
     expected_tie_calls(tied $c, 2, 2, 'calling sysread with tied buf');
@@ -190,6 +184,29 @@ ok($wgot == 0, 'a plain *foo causes no set-magic');
      'mortal magic var from do is copied';
 }
 
+# For better or worse, the order in which concat args are fetched varies
+# depending on their number. In A .= B.C.D, they are fetched in the order
+# BCDA, while for A .= B, the order is AB (so for a single concat, the LHS
+# tied arg is FETCH()ed first). Make sure multiconcat preserves current
+# behaviour.
+
+package Increment {
+    sub TIESCALAR {  bless [0, 0] }
+    # returns a new value for each FETCH, until the first STORE
+    sub FETCH { my $x = $_[0][0]; $_[0][0]++ unless $_[0][1]; $x }
+    sub STORE { @{$_[0]} = ($_[1],1) }
+
+    my $t;
+    tie $t, 'Increment';
+    my $r;
+    $r = $t . $t;
+    ::is $r, '01', 'Increment 01';
+    $r = "-$t-$t-$t-";
+    ::is $r, '-2-3-4-', 'Increment 234';
+    $t .= "-$t-$t-$t-";
+    ::is $t, '8-5-6-7-', 'Increment 8567';
+}
+
 done_testing();
 
 # adapted from Tie::Counter by Abigail