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  1. #!/usr/bin/perl
  2. use strict;
  3. use warnings;
  4.  
  5. my $text = "{value1}+{value2}-{value3}*{value...n}";
  6.  
  7. if ($text =~ /\A ({ [^{}]* }) (?: [\/+*-] (?1))* \z/x) {
  8.     while($text =~ / { [^{}]* } | [\/+*-] /gx) {
  9.         print "$&\n";
  10.     }
  11. }
  12.  
Success #stdin #stdout #stderr 0.01s 5580KB
comments (?)
stdin
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Standard input is empty
stdout
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{value1}
+
{value2}
-
{value3}
*
{value...n}
stderr
copy 
Unescaped left brace in regex is deprecated here (and will be fatal in Perl 5.32), passed through in regex; marked by <-- HERE in m/\A ({ <-- HERE  [^{}]* }) (?: [/+*-] (?1))* \z/ at prog.pl line 7.
https://ideone.com/Wi8sKN
language:
Perl (perl 5.28.1)
created:
3 years ago
visibility:
secret

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