1 files changed, 0 insertions, 282 deletions
diff --git a/lib/FLAT/Regex/Op.pm b/lib/FLAT/Regex/Op.pm
deleted file mode 100644
index 76e796c..0000000
--- a/lib/FLAT/Regex/Op.pm
+++ /dev/null
@@ -1,282 +0,0 @@
-package FLAT::Regex::Op;
-use strict;
-
-sub new {
-    my $pkg = shift;
-    ## flatten alike operations, i.e, "a+(b+c)" into "a+b+c"
-    my @flat = map { UNIVERSAL::isa($_, $pkg) ? $_->members : $_ } @_;
-
-    bless \@flat, $pkg;
-}
-
-sub members {
-    my $self = shift;
-    wantarray ? @$self[0 .. $#$self] : $self->[0];
-}
-
-
-#################################
-#### regex operators / components
-
-package FLAT::Regex::Op::atomic;
-use base 'FLAT::Regex::Op';
-
-sub as_string {
-    my $t = $_[0]->members;
-    
-    return "#" if not defined $t;
-    return $t =~ /^\w$/
-        ? $t
-        : "[$t]";
-}
-
-sub as_perl_regex {
-    my $r = $_[0]->members;
-
-    return "(?!)" if not defined $r;
-    
-    $r = quotemeta $r;
-    return $r =~ /^\w$/ ? $r : "(?:$r)";
-}
-
-sub as_nfa {
-    FLAT::NFA->singleton( $_[0]->members );
-}
-
-sub as_pfa {
-    FLAT::PFA->singleton( $_[0]->members );
-}
-
-sub from_parse {
-    my ($pkg, @item) = @_;
-    my $i = $item[1];
-    
-    return $pkg->new("")    if $i eq "[]";
-    return $pkg->new(undef) if $i eq "#";
-    
-    $i =~ s/^\[|\]$//g;
-    
-    return $pkg->new($i);
-}
-
-sub reverse {
-    $_[0];
-}
-
-sub is_empty {
-    not defined $_[0]->members;
-}
-
-sub has_nonempty_string {
-    my $self = shift;
-    defined $self->members and length $self->members;
-}
-
-sub is_finite {
-    1
-}
-
-##############################
-package FLAT::Regex::Op::star;
-use base 'FLAT::Regex::Op';
-
-sub parse_spec { "%s '*'" }
-sub precedence { 30 }
-
-sub as_string {
-    my ($self, $prec) = @_;
-    my $result = $self->members->as_string($self->precedence) . "*";
-    return $prec > $self->precedence ? "($result)" : $result;
-}
-
-sub as_perl_regex {
-    my ($self, $prec) = @_;
-    my $result = $self->members->as_perl_regex($self->precedence) . "*";
-    return $prec > $self->precedence ? "(?:$result)" : $result;   
-}
-
-sub as_nfa {
-    my $self = shift;
-    $self->members->as_nfa->kleene;
-}
-
-sub as_pfa {
-    my $self = shift;
-    $self->members->as_pfa->kleene;
-}
-
-sub from_parse {
-    my ($pkg, @item) = @_;
-    $pkg->new( $item[1] );
-}
-
-sub reverse {
-    my $self = shift;
-    my $op   = $self->members->reverse;
-    __PACKAGE__->new($op);
-}
-
-sub is_empty {
-    0
-}
-
-sub has_nonempty_string {
-    $_[0]->members->has_nonempty_string;
-}
-
-sub is_finite {
-    ! $_[0]->members->has_nonempty_string;
-}
-
-
-################################
-package FLAT::Regex::Op::concat;
-use base 'FLAT::Regex::Op';
-
-sub parse_spec { "%s(2..)"; }
-sub precedence { 20 }
-
-sub as_string {
-    my ($self, $prec) = @_;
-    my $result = join "",
-                 map { $_->as_string($self->precedence) }
-                 $self->members;
-    return $prec > $self->precedence ? "($result)" : $result;
-}
-
-sub as_perl_regex {
-    my ($self, $prec) = @_;
-    my $result = join "",
-                 map { $_->as_perl_regex($self->precedence) }
-                 $self->members;
-    return $prec > $self->precedence ? "(?:$result)" : $result;
-}
-
-sub as_nfa {
-    my $self = shift;
-    my @parts = map { $_->as_nfa } $self->members;
-    $parts[0]->concat( @parts[1..$#parts] );
-}
-
-sub as_pfa {
-    my $self = shift;
-    my @parts = map { $_->as_pfa } $self->members;
-    $parts[0]->concat( @parts[1..$#parts] );
-}
-
-sub from_parse {
-    my ($pkg, @item) = @_;
-    $pkg->new( @{ $item[1] } );
-}
-
-## note: "reverse" conflicts with perl builtin
-sub reverse {
-    my $self = shift;
-    my @ops  = CORE::reverse map { $_->reverse } $self->members;
-    __PACKAGE__->new(@ops);
-}
-
-sub is_empty {
-    my $self = shift;
-    my @members = $self->members;
-    for (@members) {
-        return 1 if $_->is_empty;
-    }
-    return 0;
-}
-
-sub has_nonempty_string {
-    my $self = shift;
-    return 0 if $self->is_empty;
-    
-    my @members = $self->members;
-    for (@members) {
-        return 1 if $_->has_nonempty_string;
-    }
-    return 0;
-}
-
-sub is_finite {
-    my $self = shift;
-    return 1 if $self->is_empty;
-    
-    my @members = $self->members;
-    for (@members) {
-        return 0 if not $_->is_finite;
-    }
-    return 1;
-}
-
-#############################
-package FLAT::Regex::Op::alt;
-use base 'FLAT::Regex::Op';
-
-sub parse_spec { "%s(2.. /[+|]/)" }
-sub precedence { 10 }
-
-sub as_string {
-    my ($self, $prec) = @_;
-    my $result = join "+",
-                 map { $_->as_string($self->precedence) }
-                 $self->members;
-    return $prec > $self->precedence ? "($result)" : $result;
-}
-
-sub as_perl_regex {
-    my ($self, $prec) = @_;
-    my $result = join "|",
-                 map { $_->as_perl_regex($self->precedence) }
-                 $self->members;
-    return $prec > $self->precedence ? "(?:$result)" : $result;
-}
-
-sub as_nfa {
-    my $self = shift;
-    my @parts = map { $_->as_nfa } $self->members;
-    $parts[0]->union( @parts[1..$#parts] );
-}
-
-sub as_pfa {
-    my $self = shift;
-    my @parts = map { $_->as_pfa } $self->members;
-    $parts[0]->union( @parts[1..$#parts] );
-}
-
-sub from_parse {
-    my ($pkg, @item) = @_;
-    $pkg->new( @{ $item[1] } );
-}
-
-sub reverse {
-    my $self = shift;
-    my @ops  = map { $_->reverse } $self->members;
-    __PACKAGE__->new(@ops);
-}
-
-sub is_empty {
-    my $self = shift;
-    my @members = $self->members;
-    for (@members) {
-        return 0 if not $_->is_empty;
-    }
-    return 1;
-}
-
-sub has_nonempty_string {
-    my $self = shift;
-    my @members = $self->members;
-    for (@members) {
-        return 1 if $_->has_nonempty_string;
-    }
-    return 0;
-}
-
-sub is_finite {
-    my $self = shift;
-    my @members = $self->members;
-    for (@members) {
-        return 0 if not $_->is_finite;
-    }
-    return 1;
-}
-1;