why can't @foo be treated as an implicit list for DWIM purposes?
What DWIM purposes? You want a scalar as
first argument to foo, so Perl is doing exactly
that, evaluating the first argument of foo in
This is a known issue with prototypes, and one of the reasons
prototypes in Perl are often thought of a "a failed experiment".
If you prototype foo as taking one scalar as
argument, and you want foo @foo to succeed, what's
the point of using a scalar prototype? Any argument is going
to be scalar anyway. The only "use" could be to fail if
@foo != 1. But that means you cannot do prototype
checking at compile time, but have to defer it to runtime.
But the neat thing about prototypes is compile time checking.
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