Re^3: Test if a string is a sub name

[choroba]

It seems the documentation uses the term "subroutine name" in quite a confusing way. Check the examples:

Use of a subroutine call, rather than a subroutine name, as an argument to exists is an error.

exists ⊂    # OK
exists &sub();  # Error

So, in this context, "subroutine name" includes the ampersand.

Considering strict, note the exceptions to strict 'refs':

$bar = \&{'foo'};
&$bar;

We are not calling the subroutine, we're just checking it exists/is defined.