Re^4: arithmetic in a regex ?

Thanks for your answers.

Does this mean, arithmetic is not possible, in this case I have to generate a list of all possible cases ?

Comment on Re^4: arithmetic in a regex ?

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Re^5: arithmetic in a regex ? by Corion (Patriarch) on Nov 13, 2023 at 10:21 UTC
You can run Perl code inside a regular expression (see perlre): `#!perl use 5.020; use Test2::V0 '-no_srand' => 1; my @cases = ( # case, expected result, todo text ['13s4', '3s4' ], ['3s44', '3s4' ], ['0a1', '0a1' ], ['0a2', undef ], ); for my $case (@cases) { my( $line, $expected, $todo ) = @$case; my ($result) = $line =~ / ( (\d).(\d) # Capture the stuff (?(?{ $2+1 != $3 })(*FAIL)) # decide if things match our extende +d criteria )/x; my $t; if ($todo){ $t = todo( $todo ) }; is( $result, $expected, $line ); } done_testing;` [download]	[reply] [d/l]

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Re^5: arithmetic in a regex ?
by Corion (Patriarch) on Nov 13, 2023 at 10:21 UTC

You can run Perl code inside a regular expression (see perlre):


#!perl
use 5.020;
use Test2::V0 '-no_srand' => 1;

my @cases = (
    # case, expected result, todo text
    ['13s4', '3s4' ],
    ['3s44', '3s4' ],
    ['0a1', '0a1' ],
    ['0a2', undef ],
);

for my $case (@cases) {
    my( $line, $expected, $todo ) = @$case;
    my ($result) = $line =~ /
    (
      (\d).(\d)   # Capture the stuff
      (?(?{ $2+1 != $3 })(*FAIL)) # decide if things match our extende
+d criteria
    )/x;

    my $t; if ($todo){ $t = todo( $todo ) };
    is( $result, $expected, $line );
}

done_testing;
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