Re^2: Detecting if a string is a regular expression

... any $string can be used as a valid regex like in m/$string/ ...

... and you don't even need the m// or qr// incantation. The =~ binding operator can do the trick:

>perl -wMstrict -le
"my $s = 'abc';
 ;;
 print 'match' if 'xabcx' =~ $s;
 print 'match' if 'xabcx' =~ 'abc';
"
match
match
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Re^3: Detecting if a string is a regular expression by LanX (Saint) on Jan 11, 2013 at 00:06 UTC
yeah I noticed, but normally I prefer the more obvious syntax. (the m is superfluous too =) Cheers Rolf PS: I know someone will show us now benchmarks demonstrating that at least 3 and half processor cycles are waisted this way ... ;)	[reply]