It takes Any — and quite a few more things than are currently documented, like IIRC filenames, and looks at the actual type passed to decide what to do with it.
On Sun, Oct 28, 2018 at 3:31 PM Xiao Yafeng <xyf.x...@gmail.com> wrote: > I'm curious about what type of $in is on Proc class. As described in > perl6doc: > $in, $out and $err are the three standard streams of the > to-be-launched program, and default to "-" meaning they inherit the > stream from the parent process. Setting one (or more) of them to True > makes the stream available as an IO::Pipe object of the same name, > like for example $proc.out. > > I mean, if $in is IO::Pipe object, how can I pass it True? > > > my IO::Pipe $bb = True; > Type check failed in assignment to $bb; expected IO::Pipe but got Bool > (Bool::True) > in block <unit> at <unknown file> line 4 > > I'm interested in the underlying mechanics of it. Please enlighten me. > > Besides, just curious, why choose '_' as default it looks strange.... > -- brandon s allbery kf8nh allber...@gmail.com
