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Infix2Postfix.pm  view on Meta::CPAN

    @{$self->{'tokens'}}=(@{$self->{'opr'}},@{$self->{'func'}},@{$self->{'vars'}},@{$self->{'grouping'}});

    $self->{'varre'}=join('|',map { quotemeta($_) } @{$self->{'vars'}});
    $self->{'funcre'}=join('|',map { quotemeta($_) } @{$self->{'func'}});

    $self->{'numre'}='[+-]?(?:\d+\.?\d*|\.\d+)(?:[eE][+-]?\d+)?';

    $self->{'re'}=join('|',(map { quotemeta($_).'(?!'.quotemeta($_).')' } @{$self->{'tokens'}}),$self->{'numre'});
    $self->{'ree'}=$self->{'re'}.'|.+?';
    $self->{ERRSTR}='';
    bless $self,$class;
    return $self;
}

sub tokenize {
    my $self=shift;
    my $str=shift;
    my $ree=$self->{'ree'};
#    print "ree: $ree\n";
    return ( $str =~ m/($ree)/g ); # tokenize
#    return ( $str =~ m/($ree)/xg ); # tokenize