How can I tell if a set of parens in perl code will act as grouping parens or form a list?

Posted by Ryan Thompson on Stack Overflow See other posts from Stack Overflow or by Ryan Thompson
Published on 2010-05-22T02:43:08Z Indexed on 2010/05/22 2:50 UTC
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perl

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context

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parentheses

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grouping

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list

In perl, parentheses are used for overriding precedence (as in most programming languages) as well as for creating lists. How can I tell if a particular pair of parens will be treated as a grouping construct or a one-element list?

For example, I'm pretty sure this is a scalar and not a one-element list: (1 + 1)
But what about more complex expressions? Is there an easy way to tell?

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