initial skeleton for deparser

diff --git a/lib/DX/Deparse.pm b/lib/DX/Deparse.pm
new file mode 100644 (file)
index 0000000..ecee7ba
--- /dev/null
+++ b/lib/DX/Deparse.pm
@@ -0,0 +1,59 @@
+package DX::Deparse;
+
+use DX::Class;
+
+sub indent_by { '    ' }
+
+sub max_width { 78 }
+
+sub _inner_meta {
+  my ($self, $ometa) = @_;
+  +{ %$ometa, width_left => $ometa->{width_left} - length $self->indent_by };
+}
+
+sub _indent_one {
+  my ($self, $to_indent) = @_;
+  $to_indent =~ s/^/${\$self->indent_by}/mg;
+  $to_indent;
+}
+
+sub fmt {
+  my ($self, $thing) = @_;
+  $self->_fmt($thing, { width_left => $self->max_width })."\n";
+}
+
+sub _fmt {
+  my ($self, $thing, $meta) = @_;
+  return $thing unless ref($thing);
+  my $type = join'_', split '::', lc +(ref($thing) =~ /^DX::(.*)/)[0];
+  $self->${\"_fmt_${type}"}($thing, $meta);
+}
+
+sub _fmt_value_dict {
+  my ($self, $dict, $ometa) = @_;
+  my $imeta = $self->_inner_meta($ometa);
+  my $chunks = $self->_indent_one(join "\n", map {
+    "$_ ".$self->_fmt($dict->get_member_at($_), $imeta)
+  } $dict->index_list);
+  "{{\n${chunks}\n}}";
+}
+
+sub _fmt_value_string {
+  my ($self, $string) = @_;
+  my $val = $string->string_value;
+  if ($val =~ /^\w+$/) {
+    qq{'${val}'}
+  } else {
+    qq{{'${val}'}}
+  }
+}
+
+sub _fmt_value_number { $_[1]->number_value }
+
+sub _fmt_value_true { 'true' }
+
+sub _fmt_value_false { 'false' }
+
+sub _fmat_value_unset { 'unset' }
+
+1;