The whole discussion is quite confusing because greediness and atomic grouping are messed up.

Could you please show a use case where you want to avoid backtracking into a once matched group (thats what atomic/possessive is about)

answering your question

> Is it true that ($match){1}+ equals to simply $match?

No!

  DB<125> $_ = "a"x5
 => "aaaaa"

  DB<126> $match = "(a+)"
 => "(a+)"

  DB<128> $_ =~ /${match}a/   
 => "aaaa"

  DB<129> $_ =~ /${match}{1}a/   
 => "aaaa"

  DB<130> $_ =~ /${match}{1}+a/   

  DB<131> $_ =~ /(?>${match})a/   

  DB<132>

[download]

It seems to show that perlre is wrong with the redundant anotation.¹

edit

Answering your root question, IMHO using + as a second quantifier like in a++ only makes sense if you already need to use a first quantifier in the first level of interpolation, like in

($pat1)++($pat2)*+

i.e. + and * are not part of a sub-pattern $patN.

Otherwise I'd always prefer

(?>$pat1)(?>$pat2)

using something like ($pat){1}+ seems quite confusing for me.

Cheers Rolf
(addicted to the Perl Programming Language and ☆☆☆☆ :)
Je suis Charlie!

¹) if "redundant" is supposed to mean line 131 and 130 are equivalent, then redundant is a misleading wording

In reply to Re^4: about style: use possessive or atomic? by LanX
in thread about style: use possessive or atomic? by rsFalse

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