mirror of
https://github.com/kanaka/mal.git
synced 2024-09-20 10:07:45 +03:00
dd7a4f55f3
Fixes made to: ada, c, chuck, clojure, coffee, common-lisp, cpp, crystal, d, dart, elm, erlang, es6, factor, fsharp, gnu-smalltalk, groovy, guile, haxe, hy, js, livescript, matlab, miniMAL, nasm, nim, objc, objpascal, ocaml, perl, perl6, php, plsql, ps, python, r, rpython, ruby, scheme, swift3, tcl, ts, vb, vimscript, wasm, yorick. Catchless try* test is an optional test. Not all implementations support catchless try* but a number were fixed so they at least don't crash on catchless try*.
100 lines
3.0 KiB
Forth
100 lines
3.0 KiB
Forth
module REPL
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open System
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open Node
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open Types
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let rec iterPairs f = function
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| Pair(first, second, t) ->
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f first second
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iterPairs f t
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| Empty -> ()
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| _ -> raise <| Error.errExpectedX "list or vector"
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let rec eval_ast env = function
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| Symbol(sym) -> Env.get env sym
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| List(_, lst) -> lst |> List.map (eval env) |> makeList
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| Vector(_, seg) -> seg |> Seq.map (eval env) |> Array.ofSeq |> Node.ofArray
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| Map(_, map) -> map |> Map.map (fun k v -> eval env v) |> makeMap
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| node -> node
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and defBang env = function
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| [sym; node] ->
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match sym with
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| Symbol(sym) ->
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let node = eval env node
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Env.set env sym node
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node
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| _ -> raise <| Error.errExpectedX "symbol"
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| _ -> raise <| Error.wrongArity ()
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and setBinding env first second =
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let s = match first with
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| Symbol(s) -> s
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| _ -> raise <| Error.errExpectedX "symbol"
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let form = eval env second
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Env.set env s form
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and letStar env = function
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| [bindings; form] ->
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let newEnv = Env.makeNew env [] []
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let binder = setBinding newEnv
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match bindings with
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| List(_, _) | Vector(_, _) -> iterPairs binder bindings
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| _ -> raise <| Error.errExpectedX "list or vector"
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eval newEnv form
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| _ -> raise <| Error.wrongArity ()
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and eval env = function
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| List(_, []) as emptyList -> emptyList
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| List(_, Symbol("def!")::rest) -> defBang env rest
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| List(_, Symbol("let*")::rest) -> letStar env rest
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| List(_, _) as node ->
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let resolved = node |> eval_ast env
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match resolved with
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| List(_, BuiltInFunc(_, _, f)::rest) -> f rest
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| _ -> raise <| Error.errExpectedX "func"
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| node -> node |> eval_ast env
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let READ input =
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Reader.read_str input
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let EVAL env ast =
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Some(eval env ast)
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let PRINT v =
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v
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|> Seq.singleton
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|> Printer.pr_str
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|> printfn "%s"
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let REP env input =
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READ input
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|> Seq.ofList
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|> Seq.choose (fun form -> EVAL env form)
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|> Seq.iter (fun value -> PRINT value)
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let getReadlineMode args =
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if args |> Array.exists (fun e -> e = "--raw") then
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Readline.Mode.Raw
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else
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Readline.Mode.Terminal
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[<EntryPoint>]
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let main args =
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let mode = getReadlineMode args
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let env = Env.makeRootEnv ()
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let rec loop () =
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match Readline.read "user> " mode with
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| null -> 0
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| input ->
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try
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REP env input
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with
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| Error.EvalError(str)
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| Error.ReaderError(str) ->
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printfn "Error: %s" str
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| ex ->
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printfn "Error: %s" (ex.Message)
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loop ()
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loop ()
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