);
}
+sub _ext_rw {
+ my ($self, $name, $key, $value) = @_;
+ return $self->{$name}{$key} unless @_ > 2;
+ $self->{$name}{$key} = $value;
+ return $self;
+}
+
+BEGIN {
+ foreach my $type (qw(
+ expand op_expand render op_renderer clause_expand clause_render
+ )) {
+ my $key = join '_', reverse split '_', $type;
+ my $singular = "${type}er";
+ eval qq{sub ${singular} { shift->_ext_rw($key => \@_) }; 1 }
+ or die "Method builder failed for ${type}er: $@";
+ eval qq{sub ${singular}s {
+ my (\$self, \@args) = \@_;
+ while (my (\$this_key, \$this_value) = splice(\@args, 0, 2)) {
+ \$self->{${key}}{\$this_key} = \$this_value;
+ }
+ return \$self;
+ }; 1 } or die "Method builder failed for ${singular}s: $@";
+ }
+}
+
+sub clauses_of {
+ my ($self, $of, @clauses) = @_;
+ unless (@clauses) {
+ return @{$self->{clauses_of}{$of}||[]};
+ }
+ if (ref($clauses[0]) eq 'CODE') {
+ @clauses = $self->${\($clauses[0])}(@{$self->{clauses_of}{$of}||[]});
+ }
+ $self->{clauses_of}{$of} = \@clauses;
+ return $self;
+}
+
+sub clone {
+ my ($self) = @_;
+ bless(
+ {
+ (map +($_ => (
+ ref($self->{$_}) eq 'HASH'
+ ? { %{$self->{$_}} }
+ : $self->{$_}
+ )), keys %$self),
+ },
+ ref($self)
+ );
+}
+
1;