HTML CompEx playground
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| // Builder | |
| type Builder<'a> (operations: BuilderOperations<'a>) = | |
| member __.Return _ : 'a = | |
| operations.Init () | |
| member __.ReturnFrom (c: 'a) : 'a = | |
| c | |
| member __.Bind (m: 'a, f: unit -> 'a) : 'a = | |
| operations.Bind (m, f) | |
| member __.Combine (m1: 'a, m2: 'a) : 'a = | |
| operations.Bind (m1, (fun () -> m2)) | |
| member __.Zero () : 'a = | |
| operations.Init () | |
| and BuilderOperations<'a> = | |
| { Init: unit -> 'a | |
| Bind: ('a * (unit -> 'a)) -> 'a } | |
| // Types | |
| type Body = | |
| | Body of BodyContent list | |
| and BodyContent = | |
| | Div of Div | |
| | Hr of Hr | |
| and Div = | |
| | Div of DivContent list | |
| and DivContent = | |
| | Div of Div | |
| | Hr of Hr | |
| and Hr = | |
| | Hr | |
| // HTML Builders | |
| // Body | |
| type BodyBuilder () = | |
| inherit Builder<Body> { | |
| Init = fun () -> Body [] | |
| Bind = fun (Body b, f) -> Body (b @ (f () |> function | Body b -> b)) } | |
| // Div | |
| type DivBuilder () = | |
| inherit Builder<Div> { | |
| Init = fun () -> Div.Div [] | |
| Bind = fun (Div.Div d, f) -> Div.Div (d @ (f () |> function | Div.Div d -> d)) } | |
| // Operations | |
| // Body | |
| type BodyBuilder with | |
| [<CustomOperation ("div", MaintainsVariableSpaceUsingBind = true)>] | |
| member inline __.Div (Body b, div) : Body = | |
| Body (b @ [ BodyContent.Div div ]) | |
| [<CustomOperation ("hr", MaintainsVariableSpaceUsingBind = true)>] | |
| member inline __.Hr (Body b) : Body = | |
| Body (b @ [ BodyContent.Hr Hr ]) | |
| // Div | |
| type DivBuilder with | |
| [<CustomOperation ("hr", MaintainsVariableSpaceUsingBind = true)>] | |
| member inline __.Hr (Div.Div d) : Div = | |
| Div.Div (d @ [ DivContent.Hr Hr ]) | |
| // Expressions | |
| module Html = | |
| // Body | |
| let body = | |
| BodyBuilder () | |
| // Div | |
| let div = | |
| DivBuilder () | |
| // Alias | |
| module h = | |
| Html | |
| // Main | |
| [<EntryPoint>] | |
| let main _ = | |
| let template = | |
| h.body { | |
| hr | |
| div (h.div { | |
| hr }) } | |
| 0 |
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