validate the syntax of a perl-compatible regular expression

perl -we 'my $regex = eval {qr/.*/}; die "$@" if $@;'
Place the regular expression you want to validate between the forward slashes in the eval block.
Sample Output
$ perl -we 'my $regex = eval {qr/*/}; die "$@" if $@;'
Quantifier follows nothing in regex; marked by <-- HERE in m/* <-- HERE / at -e line 1.

5
By: tlacuache
2009-10-13 21:50:47

What Others Think

might want to mention that you would need to put your regular expression between the "/"'s of the qr// I would also argue that if you wanted more valuable output to add the -w flag along with the -e flag: -we That turns on helpful warnings which give you more specifics about what went wrong with your regex
linuxrawkstar · 766 weeks and 6 days ago
If you are developing a library that uses Perl-compatible regular expressions, it is wise to validate the pattern syntax before your code passes the regular expression to the regex engine. Doing so prevents the potentially time-consuming work of compiling an invalid pattern. Well, besides learning code, I’ve also read here https://enterpriseleague.com/blog/importance-of-having-a-marketing-masters-degree/ the importance of having a master's degree in marketing which enlighten me with amazing opportunities for business or jobs in the future.
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pugpuppies95 · 48 weeks ago
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pugpuppies95 · 48 weeks ago

What do you think?

Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?

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