chromatic nicely summarises the parsing problem here:
new Foo has two barewords, and whenever the Perl parser encounters barewords, it has to guess at what they are.
Sometimes it has hints at what those barewords are (if it's encountered declarations of filehandles or subroutines)
and it can guess correctly. Sometimes it doesn't have hints, because Perl embraces late binding.
See also:
Related:
Added later:
- Guacamole by Sawyer X (CPAN) - a parser toolkit for Standard Perl
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