Re^2: Almost certainly a module documentation issue

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 :-).

Comment on Re^2: Almost certainly a module documentation issue Download Code

Replies are listed 'Best First'.
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]

Replies are listed 'Best First'.

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]