Assigning anonymous hash to a list

[Smylers]

gvim writes:

> On 30/07/2013 20:09, Joseph Werner wrote:
> 
> > It is because you are not assigning a list value to a list.  You are
> > assigning a scalar value that is the result of a ',' expression  to
> > the first element in the list.
> 
> Got it. Nothing to do with the hashref. Should have used parens ...

Yes!

> ... to create list context.

No -- you already had list context!

But , has lower precedence than = does (see perldoc perlop). So your
statement:

  my ($str, $ref) = 'text', {a => 1, b => 2, c => 3};

is parsed as first do this -- which is a list-context assignment:

  my ($str, $ref) = 'text'

and then 'do' this -- which is just some data, in void context:

  {a => 1, b => 2, c => 3}

The extra parens on the right don't change any context; they just
restrict the comma to only operating inside those parens, rather than
splitting up your statement in an unwanted place.

Smylers
-- 
Stop drug companies hiding negative research results.
Sign the AllTrials petition to get all clinical research results published.
Read more: http://www.alltrials.net/blog/the-alltrials-campaign/