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Re^2: RFC: Parsing with perl - Regexes and beyond

by beech (Parson)
on May 04, 2016 at 07:51 UTC ( #1162160=note: print w/replies, xml ) Need Help??


in reply to Re: RFC: Parsing with perl - Regexes and beyond
in thread RFC: Parsing with perl - Regexes and beyond

Interesting this ideone if it really lets you run actual perl code, anyway, its best in the future if you also post the code here in code tags, here is the output on my machine

#!/usr/bin/perl use strict; use warnings; use Data::Dumper; my $input = $ARGV[0] // "2 * 3 + 4 # and a comment\n"; my @tokens; $^R and push @tokens, [$^R, $1] while $^R = undef, $input =~ /( \#.*$ | \s+ | [+-] (?{'AddOp'}) | [*\/] (?{'MulOp'}) | \d+ (?{'Number'}) | \( (?{'OpenParen'}) | \) (?{'CloseParen'}) | . (?{ die "Syntax error at position $-[0]\n" }) )/gmx; print Dumper \@tokens; $ perl sUnahm $VAR1 = [ [ 'Number', '2' ], [ 'MulOp', '*' ], [ 'Number', '3' ], [ 'AddOp', '+' ], [ 'Number', '4' ] ];

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