qr/STRING/msixpo

This operator quotes (and possibly compiles) its STRING as a regular expression. STRING is interpolated the same way as PATTERN in m/PATTERN/. If "'" is used as the delimiter, no interpolation is done. Returns a Perl value which may be used instead of the corresponding /STRING/msixpo expression. The returned value is a normalized version of the original pattern. It magically differs from a string containing the same characters: ref(qr/x/) returns "Regexp", even though dereferencing the result returns undef.

I think the relevant part of the docs is the bit I've highlighted. qr// compiles normalises the regex--which basically means blessing it. Hence the magical behaviour.

Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.
RIP PCW

In reply to Re: What is the best way to compare variables so that different types are non-equal? by BrowserUk
in thread What is the best way to compare variables so that different types are non-equal? by ELISHEVA

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