John Ky wrote:
Hi,
I've got an object model that I have a difficult time conceptualising how it might look like in Haskell:
class Element { }
class Inline : Element { }
class ParentInline : Inline { List<Inline> children; }
class Bold : ParentInline { } class Underline : ParentInline { }
class Link : ParentInline { String link; }
class Text : Inline { String text; }
class Block : Element { }
class Paragraph : Block { List<Inline> paragraph; }
class Heading : Block { List<Inline> heading; }
class Document : Element { List<Block> blocks; }
How best to represent this OO data model in Haskell? You could, depending on what you intend to do, model a hierarchical document type something like this (if I read your model correctly):
type Document = [Block] data Block = Heading [Inline] | Paragraph [Inline] data Inline = Text String | ParentInline data ParentInline = PIL PILType [Inline] data PILType = Bold | Underline | Link String Does that fit? -k