Re^2: why is it considered good syntax to put \* before STDIN or STDOUT

as a side note, passing a glob also works!

> perl
use strict;
use warnings;
use diagnostics;

sub myprint {
  my( $fh, $text ) = @_;
  print $fh $text;
}

sub STDOUT {
  print "Woops!\n";
}

myprint( *STDOUT, "Hello world!\n" );
__END__
Hello world!
>
[download]

I'd rather prefer to be able to disable/deprecate indirect object syntax ...

...but unfortunately this doesnt work :(

> perl
my $x=\*STDOUT;
$x->print("hu hu");                 
__END__
Can't locate object method "print" via package "IO::Handle" at - line 
+2.
[download]

nor this

> perl
open my $x, ">", "/tmp/tst";
$x->print("hu hu");
print `cat /tmp/tst`;                      
__END__
Can't locate object method "print" via package "IO::Handle" at - line 
+2.
[download]

Cheers Rolf

(addicted to the Perl Programming Language)

Comment on Re^2: why is it considered good syntax to put \* before STDIN or STDOUT Select or Download Code

Replies are listed 'Best First'.
Re^3: why is it considered good syntax to put \* before STDIN or STDOUT by Anonymous Monk on Jun 08, 2014 at 20:32 UTC
I'm testing with the Arch Linux system Perl and, unless I'm missing something, it seems that both of your examples that "don't work", work for me. `$ perl my $x = \*STDOUT; $x->print("STDOUT test"); STDOUT test $ perl open my $x, '>', "/tmp/tst"; $x->print("blah blah"); $ cat /tmp/tst blah blah $ perl -v This is perl 5, version 20, subversion 0 (v5.20.0) built for x86_64-li +nux-thread-multi` [download]	[reply] [d/l]
Re^4: why is it considered good syntax to put \* before STDIN or STDOUT (perldelta) by LanX (Saint) on Jun 08, 2014 at 20:52 UTC
Thanks for testing! ...must have been fixed in the meantime! (?)š `> perl -v This is perl, v5.10.0 built for i486-linux-gnu-thread-multi` [download] to which class does $x belong to? still IO::Handle ? ... ARGHHHH ... Did you explicitly `use` IO::Handle ? My examples work now after importing. `> perl use IO::Handle; my $x=\STDOUT; $x->print("hu hu"); __END__ hu hu` [download] update š) 5.12.0/perldelta.html#Other-potentially-incompatible-changes Filehandles are now always blessed into IO::File .* The previous behaviour was to bless Filehandles into FileHandle (an empty proxy class) if it was loaded into memory and otherwise to bless them into IO::Handle . Cheers Rolf (addicted to the Perl Programming Language)	[reply] [d/l] [select]
Re^4: why is it considered good syntax to put \* before STDIN or STDOUT by Laurent_R (Canon) on Jun 09, 2014 at 06:37 UTC
Did you try these examples with the `use strict;` and `use warnings;` pragmas turned on?	[reply] [d/l] [select]
Re^5: why is it considered good syntax to put \* before STDIN or STDOUT by mr_mischief (Monsignor) on Jun 09, 2014 at 14:00 UTC
I just tested with 5.16.2 on OSX and it worked fine under strictures and warnings.	[reply]

update