Re: Almost certainly a module documentation issue

A preliminary attempt to look at the source code of the module foundered

It's here, the bit of code that is relevant here is "has 'fh' => ( isa => InstanceOf['IO::Handle'], ..." (and yes, this is from Moo).

To put 1nickt's suggestion into code - if you modify your code like the following, it works for me:

use IO::Handle;
my $sm = IO::Handle->new;
open ($sm, ...
[download]

Comment on Re: Almost certainly a module documentation issue Select or Download Code

Replies are listed 'Best First'.
Re^2: Almost certainly a module documentation issue by dd-b (Pilgrim) on Oct 14, 2017 at 20:24 UTC
This worked. This code ran, and the result was acceptable to Email::Sender::Transport::Print->new(). In some ways I'm more confused than ever, though, because when I display the filehandle in perldb the new code shows me `DB<4> x $sm 0 IO::Handle=GLOB(0x80695a1c8) -> Symbol::GEN0 FileHandle({Symbol::GEN0}) => fileno(7) DB<5> n` [download] while isn't IO::Handle anywhere, and duplicates the FileHandle shown in the original code (but wrapped a level down). Still, it's clearly different, and it works, so I won't complain :-).	[reply] [d/l]
Re^3: Almost certainly a module documentation issue by haukex (Archbishop) on Oct 15, 2017 at 11:04 UTC
while isn't IO::Handle anywhere, and duplicates the FileHandle shown in the original code It's an object of type IO::Handle, as shown in the first line of the dump. Basically `IO::Handle->new` boils down to blessing a new symbol as returned by Symbol::gensym (which explains the second line of the dump) into the class `IO::Handle` (source). If you step through the code, you should see the following: `Before the open() 0 IO::Handle=GLOB(0x1948fb2) -> Symbol::GEN0 After* the open() 0 IO::Handle=GLOB(0x1948fb2) -> Symbol::GEN0 FileHandle({Symbol::GEN0}) => fileno(7)` [download] So the FileHandle appears to be the result of opening the file.	[reply] [d/l] [select]