Because I like Path::Tiny, I wanted to add that it does include methods for these tests, too. Then I noticed that the author himself says
Use -f instead if you really mean to check for a plain file.

Another ++ I'd give for your example of enclosing the file name in visible delimiters like "<$file>".

However, use 5.011 implies strict (although use states 5.012 as the first with this property) so OP already is "strict-compliant" ;-)

In reply to Re^2: creating valid paths for Path::Tiny by soonix
in thread creating valid paths for Path::Tiny by Aldebaran

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