SPUG: assigning to slice of anon hash?

[El JoPe Magnifico]

Quick (hopefully) perl syntax question that I ran into last night.
You can assign to a slice of a hash with the following:

  @hash{ @fields } = @values;

However, I can't figure out how to do the same with a hash ref.
The following gives a runtime error, "Can't coerce array into hash",
since the @{$ref} construct is generally how you deref an array ref:

  @{ $hash_ref }->{ @fields } = @values;

And the following (which wouldn't be syntactically consistent,
but I tried just in case) doesn't do the trick either:

  %{ $hash_ref }->{ @fields } = @values;

I'm using perl 5.6.1.  Assistance appreciated!  =)
  -jp


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