A whole module that does what I want as a substitute for a single, built-in function that does not, and actually dies in some cases I'd want it to return true.

use 5.010;
use Test::More tests => 6;
use IO::Detect;
use IO::All;
use IO::Scalar;

my $filename = '/dev/null';

open my $fh, '>', $filename;
my $all = IO::All->new($filename);
my $scalar = IO::Scalar->new(\(my $dummy));

diag "Testing IO::Detect";
ok is_filehandle($fh);
ok is_filehandle($all);
ok is_filehandle($scalar);

diag "Testing fileno";
ok defined fileno($fh);
ok defined fileno($all);
ok defined fileno($scalar);

[download]
perl -E'sub Monkey::do{say$_,for@_,do{($monkey=[caller(0)]->[3])=~s{::}{ }and$monkey}}"Monkey say"->Monkey::do'

In reply to Re^2: Best way to check if something is a file handle? by tobyink
in thread Best way to check if something is a file handle? by tobyink

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