Documentation for method t assembled from the following pages:

Class: IO::CatHandle §

From IO::CatHandle

(IO::CatHandle) method t §

Defined as:

method t(IO::CatHandle:D: --> Bool:D)

Calls .t, which tells if the handle is a TTY, on the currently active source handle and returns the result. If the source handle queue has been exhausted, returns False.

(my $f1 = 'foo'.IO).spurt: 'foo';
with IO::CatHandle.new: $f1, $*IN {
    repeat { .t.say } while .next-handle; # OUTPUT: «False␤True␤» 
}

Class: IO::Handle §

From IO::Handle

(IO::Handle) method t §

Defined as:

method t(IO::Handle:D: --> Bool:D)

Returns True if the handle is opened to a TTY, False otherwise.