src/Tools/Code/code_haskell.ML
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(*  Title:      Tools/Code/code_haskell.ML
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    Author:     Florian Haftmann, TU Muenchen
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Serializer for Haskell.
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*)
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signature CODE_HASKELL =
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sig
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  val language_params: string
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  val target: string
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  val setup: theory -> theory
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end;
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structure Code_Haskell : CODE_HASKELL =
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struct
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val target = "Haskell";
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val language_extensions =
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  ["EmptyDataDecls", "RankNTypes", "ScopedTypeVariables"];
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val language_pragma =
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  "{-# LANGUAGE " ^ commas language_extensions ^ " #-}";
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val language_params =
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  space_implode " " (map (prefix "-X") language_extensions);
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open Basic_Code_Thingol;
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open Code_Printer;
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infixr 5 @@;
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infixr 5 @|;
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(** Haskell serializer **)
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fun print_haskell_stmt class_syntax tyco_syntax const_syntax
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    reserved deresolve deriving_show =
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  let
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    fun class_name class = case class_syntax class
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     of NONE => deresolve class
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      | SOME class => class;
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    fun print_typcontext tyvars vs = case maps (fn (v, sort) => map (pair v) sort) vs
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     of [] => []
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      | constraints => enum "," "(" ")" (
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          map (fn (v, class) =>
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            str (class_name class ^ " " ^ lookup_var tyvars v)) constraints)
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          @@ str " => ";
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    fun print_typforall tyvars vs = case map fst vs
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     of [] => []
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      | vnames => str "forall " :: Pretty.breaks
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          (map (str o lookup_var tyvars) vnames) @ str "." @@ Pretty.brk 1;
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    fun print_tyco_expr tyvars fxy (tyco, tys) =
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      brackify fxy (str tyco :: map (print_typ tyvars BR) tys)
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    and print_typ tyvars fxy (tyco `%% tys) = (case tyco_syntax tyco
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         of NONE => print_tyco_expr tyvars fxy (deresolve tyco, tys)
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          | SOME (_, print) => print (print_typ tyvars) fxy tys)
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      | print_typ tyvars fxy (ITyVar v) = (str o lookup_var tyvars) v;
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    fun print_typdecl tyvars (tyco, vs) =
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      print_tyco_expr tyvars NOBR (tyco, map ITyVar vs);
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    fun print_typscheme tyvars (vs, ty) =
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      Pretty.block (print_typforall tyvars vs @ print_typcontext tyvars vs @| print_typ tyvars NOBR ty);
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    fun print_term tyvars some_thm vars fxy (IConst const) =
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          print_app tyvars some_thm vars fxy (const, [])
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      | print_term tyvars some_thm vars fxy (t as (t1 `$ t2)) =
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          (case Code_Thingol.unfold_const_app t
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           of SOME app => print_app tyvars some_thm vars fxy app
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            | _ =>
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                brackify fxy [
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                  print_term tyvars some_thm vars NOBR t1,
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                  print_term tyvars some_thm vars BR t2
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                ])
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      | print_term tyvars some_thm vars fxy (IVar NONE) =
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          str "_"
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      | print_term tyvars some_thm vars fxy (IVar (SOME v)) =
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          (str o lookup_var vars) v
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      | print_term tyvars some_thm vars fxy (t as _ `|=> _) =
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          let
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            val (binds, t') = Code_Thingol.unfold_pat_abs t;
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            val (ps, vars') = fold_map (print_bind tyvars some_thm BR o fst) binds vars;
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          in brackets (str "\\" :: ps @ str "->" @@ print_term tyvars some_thm vars' NOBR t') end
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      | print_term tyvars some_thm vars fxy (ICase case_expr) =
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          (case Code_Thingol.unfold_const_app (#primitive case_expr)
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           of SOME (app as ({ name = c, ... }, _)) => if is_none (const_syntax c)
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                then print_case tyvars some_thm vars fxy case_expr
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                else print_app tyvars some_thm vars fxy app
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            | NONE => print_case tyvars some_thm vars fxy case_expr)
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    and print_app_expr tyvars some_thm vars ({ name = c, dom, range, annotate, ... }, ts) =
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      let
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        val ty = Library.foldr (fn (ty1, ty2) => Code_Thingol.fun_tyco `%% [ty1, ty2]) (dom, range)
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        val printed_const =
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          if annotate then
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            brackets [(str o deresolve) c, str "::", print_typ tyvars NOBR ty]
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          else
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            (str o deresolve) c
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      in 
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        printed_const :: map (print_term tyvars some_thm vars BR) ts
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      end
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    and print_app tyvars = gen_print_app (print_app_expr tyvars) (print_term tyvars) const_syntax
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    and print_bind tyvars some_thm fxy p = gen_print_bind (print_term tyvars) some_thm fxy p
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    and print_case tyvars some_thm vars fxy { clauses = [], ... } =
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          (brackify fxy o Pretty.breaks o map str) ["error", "\"empty case\""]
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      | print_case tyvars some_thm vars fxy (case_expr as { clauses = [_], ... }) =
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          let
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            val (binds, body) = Code_Thingol.unfold_let (ICase case_expr);
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            fun print_match ((pat, _), t) vars =
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              vars
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              |> print_bind tyvars some_thm BR pat
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              |>> (fn p => semicolon [p, str "=", print_term tyvars some_thm vars NOBR t])
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            val (ps, vars') = fold_map print_match binds vars;
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          in brackify_block fxy (str "let {")
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            ps
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            (concat [str "}", str "in", print_term tyvars some_thm vars' NOBR body])
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          end
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      | print_case tyvars some_thm vars fxy { term = t, typ = ty, clauses = clauses as _ :: _, ... } =
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          let
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            fun print_select (pat, body) =
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              let
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                val (p, vars') = print_bind tyvars some_thm NOBR pat vars;
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              in semicolon [p, str "->", print_term tyvars some_thm vars' NOBR body] end;
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          in Pretty.block_enclose
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            (concat [str "(case", print_term tyvars some_thm vars NOBR t, str "of", str "{"], str "})")
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            (map print_select clauses)
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          end;
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    fun print_stmt (name, Code_Thingol.Fun (_, (((vs, ty), raw_eqs), _))) =
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          let
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            val tyvars = intro_vars (map fst vs) reserved;
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            fun print_err n =
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              semicolon (
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                (str o deresolve) name
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                :: map str (replicate n "_")
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                @ str "="
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                :: str "error"
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                @@ (str o ML_Syntax.print_string
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                    o Long_Name.base_name o Long_Name.qualifier) name
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              );
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            fun print_eqn ((ts, t), (some_thm, _)) =
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              let
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                val consts = fold Code_Thingol.add_constnames (t :: ts) [];
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                val vars = reserved
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                  |> intro_base_names
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                      (is_none o const_syntax) deresolve consts
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                  |> intro_vars ((fold o Code_Thingol.fold_varnames)
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                      (insert (op =)) ts []);
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              in
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                semicolon (
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                  (str o deresolve) name
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                  :: map (print_term tyvars some_thm vars BR) ts
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                  @ str "="
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                  @@ print_term tyvars some_thm vars NOBR t
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                )
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              end;
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          in
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            Pretty.chunks (
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              semicolon [
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                (str o suffix " ::" o deresolve) name,
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                print_typscheme tyvars (vs, ty)
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              ]
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              :: (case filter (snd o snd) raw_eqs
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               of [] => [print_err ((length o fst o Code_Thingol.unfold_fun) ty)]
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                | eqs => map print_eqn eqs)
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            )
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          end
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      | print_stmt (name, Code_Thingol.Datatype (_, (vs, []))) =
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          let
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            val tyvars = intro_vars vs reserved;
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          in
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            semicolon [
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              str "data",
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              print_typdecl tyvars (deresolve name, vs)
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            ]
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          end
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      | print_stmt (name, Code_Thingol.Datatype (_, (vs, [((co, _), [ty])]))) =
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          let
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            val tyvars = intro_vars vs reserved;
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          in
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            semicolon (
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              str "newtype"
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              :: print_typdecl tyvars (deresolve name, vs)
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              :: str "="
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              :: (str o deresolve) co
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              :: print_typ tyvars BR ty
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              :: (if deriving_show name then [str "deriving (Read, Show)"] else [])
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            )
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          end
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      | print_stmt (name, Code_Thingol.Datatype (_, (vs, co :: cos))) =
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          let
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            val tyvars = intro_vars vs reserved;
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            fun print_co ((co, _), tys) =
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              concat (
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                (str o deresolve) co
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                :: map (print_typ tyvars BR) tys
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              )
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          in
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            semicolon (
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              str "data"
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              :: print_typdecl tyvars (deresolve name, vs)
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              :: str "="
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              :: print_co co
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              :: map ((fn p => Pretty.block [str "| ", p]) o print_co) cos
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              @ (if deriving_show name then [str "deriving (Read, Show)"] else [])
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            )
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          end
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      | print_stmt (name, Code_Thingol.Class (_, (v, (super_classes, classparams)))) =
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          let
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            val tyvars = intro_vars [v] reserved;
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            fun print_classparam (classparam, ty) =
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              semicolon [
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                (str o deresolve) classparam,
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                str "::",
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                print_typ tyvars NOBR ty
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              ]
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          in
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            Pretty.block_enclose (
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              Pretty.block [
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                str "class ",
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                Pretty.block (print_typcontext tyvars [(v, map fst super_classes)]),
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                str (deresolve name ^ " " ^ lookup_var tyvars v),
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                str " where {"
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              ],
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              str "};"
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            ) (map print_classparam classparams)
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          end
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      | print_stmt (_, Code_Thingol.Classinst { class, tyco, vs, inst_params, ... }) =
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          let
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            val tyvars = intro_vars (map fst vs) reserved;
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            fun requires_args classparam = case const_syntax classparam
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             of NONE => NONE
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              | SOME (Code_Printer.Plain_const_syntax _) => SOME 0
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              | SOME (Code_Printer.Complex_const_syntax (k,_ )) => SOME k;
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            fun print_classparam_instance ((classparam, const), (thm, _)) =
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              case requires_args classparam
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               of NONE => semicolon [
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                      (str o Long_Name.base_name o deresolve) classparam,
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                      str "=",
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                      print_app tyvars (SOME thm) reserved NOBR (const, [])
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                    ]
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                | SOME k =>
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                    let
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                      val { name = c, dom, range, ... } = const;
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                      val (vs, rhs) = (apfst o map) fst
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                        (Code_Thingol.unfold_abs (Code_Thingol.eta_expand k (const, [])));
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                      val s = if (is_some o const_syntax) c
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                        then NONE else (SOME o Long_Name.base_name o deresolve) c;
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                      val vars = reserved
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                        |> intro_vars (map_filter I (s :: vs));
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                      val lhs = IConst { name = classparam, typargs = [],
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                        dicts = [], dom = dom, range = range, annotate = false } `$$ map IVar vs;
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                        (*dictionaries are not relevant at this late stage,
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                          and these consts never need type annotations for disambiguation *)
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                    in
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                      semicolon [
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                        print_term tyvars (SOME thm) vars NOBR lhs,
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                        str "=",
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                        print_term tyvars (SOME thm) vars NOBR rhs
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                      ]
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                    end;
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          in
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            Pretty.block_enclose (
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              Pretty.block [
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                str "instance ",
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                Pretty.block (print_typcontext tyvars vs),
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                str (class_name class ^ " "),
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                print_typ tyvars BR (tyco `%% map (ITyVar o fst) vs),
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                str " where {"
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              ],
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              str "};"
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            ) (map print_classparam_instance inst_params)
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          end;
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  in print_stmt end;
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fun haskell_program_of_program labelled_name module_alias module_prefix reserved =
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  let
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    fun namify_fun upper base (nsp_fun, nsp_typ) =
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      let
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        val (base', nsp_fun') =
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          Name.variant (if upper then first_upper base else base) nsp_fun;
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      in (base', (nsp_fun', nsp_typ)) end;
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    fun namify_typ base (nsp_fun, nsp_typ) =
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      let
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        val (base', nsp_typ') = Name.variant (first_upper base) nsp_typ;
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      in (base', (nsp_fun, nsp_typ')) end;
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    fun namify_stmt (Code_Thingol.Fun (_, (_, SOME _))) = pair
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      | namify_stmt (Code_Thingol.Fun _) = namify_fun false
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      | namify_stmt (Code_Thingol.Datatype _) = namify_typ
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      | namify_stmt (Code_Thingol.Datatypecons _) = namify_fun true
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      | namify_stmt (Code_Thingol.Class _) = namify_typ
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      | namify_stmt (Code_Thingol.Classrel _) = pair
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      | namify_stmt (Code_Thingol.Classparam _) = namify_fun false
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      | namify_stmt (Code_Thingol.Classinst _) = pair;
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    fun select_stmt (Code_Thingol.Fun (_, (_, SOME _))) = false
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      | select_stmt (Code_Thingol.Fun _) = true
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      | select_stmt (Code_Thingol.Datatype _) = true
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      | select_stmt (Code_Thingol.Datatypecons _) = false
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      | select_stmt (Code_Thingol.Class _) = true
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      | select_stmt (Code_Thingol.Classrel _) = false
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      | select_stmt (Code_Thingol.Classparam _) = false
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      | select_stmt (Code_Thingol.Classinst _) = true;
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  in
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    Code_Namespace.flat_program labelled_name
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      { module_alias = module_alias, module_prefix = module_prefix,
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        reserved = reserved, empty_nsp = (reserved, reserved), namify_stmt = namify_stmt,
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        modify_stmt = fn stmt => if select_stmt stmt then SOME stmt else NONE }
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  end;
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val prelude_import_operators = [
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  "==", "/=", "<", "<=", ">=", ">", "+", "-", "*", "/", "**", ">>=", ">>", "=<<", "&&", "||", "^", "^^", ".", "$", "$!", "++", "!!"
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];
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val prelude_import_unqualified = [
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   311
  "Eq",
6efff142bb54 restrict unqualified imports from Haskell Prelude to a small set of fundamental operations
haftmann
parents: 48072
diff changeset
   312
  "error",
6efff142bb54 restrict unqualified imports from Haskell Prelude to a small set of fundamental operations
haftmann
parents: 48072
diff changeset
   313
  "id",
6efff142bb54 restrict unqualified imports from Haskell Prelude to a small set of fundamental operations
haftmann
parents: 48072
diff changeset
   314
  "return",
6efff142bb54 restrict unqualified imports from Haskell Prelude to a small set of fundamental operations
haftmann
parents: 48072
diff changeset
   315
  "not",
6efff142bb54 restrict unqualified imports from Haskell Prelude to a small set of fundamental operations
haftmann
parents: 48072
diff changeset
   316
  "fst", "snd",
6efff142bb54 restrict unqualified imports from Haskell Prelude to a small set of fundamental operations
haftmann
parents: 48072
diff changeset
   317
  "map", "filter", "concat", "concatMap", "reverse", "zip", "null", "takeWhile", "dropWhile", "all", "any",
6efff142bb54 restrict unqualified imports from Haskell Prelude to a small set of fundamental operations
haftmann
parents: 48072
diff changeset
   318
  "Integer", "negate", "abs", "divMod",
6efff142bb54 restrict unqualified imports from Haskell Prelude to a small set of fundamental operations
haftmann
parents: 48072
diff changeset
   319
  "String"
6efff142bb54 restrict unqualified imports from Haskell Prelude to a small set of fundamental operations
haftmann
parents: 48072
diff changeset
   320
];
6efff142bb54 restrict unqualified imports from Haskell Prelude to a small set of fundamental operations
haftmann
parents: 48072
diff changeset
   321
6efff142bb54 restrict unqualified imports from Haskell Prelude to a small set of fundamental operations
haftmann
parents: 48072
diff changeset
   322
val prelude_import_unqualified_constr = [
6efff142bb54 restrict unqualified imports from Haskell Prelude to a small set of fundamental operations
haftmann
parents: 48072
diff changeset
   323
  ("Bool", ["True", "False"]),
6efff142bb54 restrict unqualified imports from Haskell Prelude to a small set of fundamental operations
haftmann
parents: 48072
diff changeset
   324
  ("Maybe", ["Nothing", "Just"])
6efff142bb54 restrict unqualified imports from Haskell Prelude to a small set of fundamental operations
haftmann
parents: 48072
diff changeset
   325
];
6efff142bb54 restrict unqualified imports from Haskell Prelude to a small set of fundamental operations
haftmann
parents: 48072
diff changeset
   326
39142
f63715f00fdd dropped names from serializer interface
haftmann
parents: 39102
diff changeset
   327
fun serialize_haskell module_prefix string_classes { labelled_name, reserved_syms,
41343
71f4f15258a5 program is separate argument to serializer
haftmann
parents: 41246
diff changeset
   328
    includes, module_alias, class_syntax, tyco_syntax, const_syntax } program =
28054
2b84d34c5d02 restructured and split code serializer module
haftmann
parents:
diff changeset
   329
  let
39204
3d30f501b7c2 Haskell uses generic flat_program combinator
haftmann
parents: 39202
diff changeset
   330
3d30f501b7c2 Haskell uses generic flat_program combinator
haftmann
parents: 39202
diff changeset
   331
    (* build program *)
38926
24f82786cc57 record argument for serializers
haftmann
parents: 38924
diff changeset
   332
    val reserved = fold (insert (op =) o fst) includes reserved_syms;
39204
3d30f501b7c2 Haskell uses generic flat_program combinator
haftmann
parents: 39202
diff changeset
   333
    val { deresolver, flat_program = haskell_program } = haskell_program_of_program
3d30f501b7c2 Haskell uses generic flat_program combinator
haftmann
parents: 39202
diff changeset
   334
      labelled_name module_alias module_prefix (Name.make_context reserved) program;
3d30f501b7c2 Haskell uses generic flat_program combinator
haftmann
parents: 39202
diff changeset
   335
3d30f501b7c2 Haskell uses generic flat_program combinator
haftmann
parents: 39202
diff changeset
   336
    (* print statements *)
28054
2b84d34c5d02 restructured and split code serializer module
haftmann
parents:
diff changeset
   337
    fun deriving_show tyco =
2b84d34c5d02 restructured and split code serializer module
haftmann
parents:
diff changeset
   338
      let
2b84d34c5d02 restructured and split code serializer module
haftmann
parents:
diff changeset
   339
        fun deriv _ "fun" = false
34085
420234017d39 improved crude deriving_show inference
haftmann
parents: 34073
diff changeset
   340
          | deriv tycos tyco = not (tyco = Code_Thingol.fun_tyco)
420234017d39 improved crude deriving_show inference
haftmann
parents: 34073
diff changeset
   341
              andalso (member (op =) tycos tyco
420234017d39 improved crude deriving_show inference
haftmann
parents: 34073
diff changeset
   342
              orelse case try (Graph.get_node program) tyco
28663
bd8438543bf2 code identifier namings are no longer imperative
haftmann
parents: 28350
diff changeset
   343
                of SOME (Code_Thingol.Datatype (_, (_, cs))) => forall (deriv' (tyco :: tycos))
28054
2b84d34c5d02 restructured and split code serializer module
haftmann
parents:
diff changeset
   344
                    (maps snd cs)
34085
420234017d39 improved crude deriving_show inference
haftmann
parents: 34073
diff changeset
   345
                 | NONE => true)
28054
2b84d34c5d02 restructured and split code serializer module
haftmann
parents:
diff changeset
   346
        and deriv' tycos (tyco `%% tys) = deriv tycos tyco
2b84d34c5d02 restructured and split code serializer module
haftmann
parents:
diff changeset
   347
              andalso forall (deriv' tycos) tys
2b84d34c5d02 restructured and split code serializer module
haftmann
parents:
diff changeset
   348
          | deriv' _ (ITyVar _) = true
2b84d34c5d02 restructured and split code serializer module
haftmann
parents:
diff changeset
   349
      in deriv [] tyco end;
47609
b3dab1892cda dropped dead code
haftmann
parents: 46961
diff changeset
   350
    fun print_stmt deresolve = print_haskell_stmt
39204
3d30f501b7c2 Haskell uses generic flat_program combinator
haftmann
parents: 39202
diff changeset
   351
      class_syntax tyco_syntax const_syntax (make_vars reserved)
45009
99e1965f9c21 syntactic improvements and tuning names in the code generator due to Florian's code review
bulwahn
parents: 44940
diff changeset
   352
      deresolve (if string_classes then deriving_show else K false);
39204
3d30f501b7c2 Haskell uses generic flat_program combinator
haftmann
parents: 39202
diff changeset
   353
3d30f501b7c2 Haskell uses generic flat_program combinator
haftmann
parents: 39202
diff changeset
   354
    (* print modules *)
3d30f501b7c2 Haskell uses generic flat_program combinator
haftmann
parents: 39202
diff changeset
   355
    fun print_module_frame module_name ps =
3d30f501b7c2 Haskell uses generic flat_program combinator
haftmann
parents: 39202
diff changeset
   356
      (module_name, Pretty.chunks2 (
39209
1ca9055ba1f7 only write ghc pragma when writing to a file
haftmann
parents: 39207
diff changeset
   357
        str ("module " ^ module_name ^ " where {")
39204
3d30f501b7c2 Haskell uses generic flat_program combinator
haftmann
parents: 39202
diff changeset
   358
        :: ps
3d30f501b7c2 Haskell uses generic flat_program combinator
haftmann
parents: 39202
diff changeset
   359
        @| str "}"
3d30f501b7c2 Haskell uses generic flat_program combinator
haftmann
parents: 39202
diff changeset
   360
      ));
48431
6efff142bb54 restrict unqualified imports from Haskell Prelude to a small set of fundamental operations
haftmann
parents: 48072
diff changeset
   361
    fun print_qualified_import module_name = semicolon [str "import qualified", str module_name];
6efff142bb54 restrict unqualified imports from Haskell Prelude to a small set of fundamental operations
haftmann
parents: 48072
diff changeset
   362
    val import_common_ps =
6efff142bb54 restrict unqualified imports from Haskell Prelude to a small set of fundamental operations
haftmann
parents: 48072
diff changeset
   363
      enclose "import Prelude (" ");" (commas (map str
6efff142bb54 restrict unqualified imports from Haskell Prelude to a small set of fundamental operations
haftmann
parents: 48072
diff changeset
   364
        (map (Library.enclose "(" ")") prelude_import_operators @ prelude_import_unqualified)
6efff142bb54 restrict unqualified imports from Haskell Prelude to a small set of fundamental operations
haftmann
parents: 48072
diff changeset
   365
          @ map (fn (tyco, constrs) => (enclose (tyco ^ "(") ")" o commas o map str) constrs) prelude_import_unqualified_constr))
6efff142bb54 restrict unqualified imports from Haskell Prelude to a small set of fundamental operations
haftmann
parents: 48072
diff changeset
   366
      :: print_qualified_import "Prelude"
6efff142bb54 restrict unqualified imports from Haskell Prelude to a small set of fundamental operations
haftmann
parents: 48072
diff changeset
   367
      :: map (print_qualified_import o fst) includes;
39204
3d30f501b7c2 Haskell uses generic flat_program combinator
haftmann
parents: 39202
diff changeset
   368
    fun print_module module_name (gr, imports) =
28054
2b84d34c5d02 restructured and split code serializer module
haftmann
parents:
diff changeset
   369
      let
48431
6efff142bb54 restrict unqualified imports from Haskell Prelude to a small set of fundamental operations
haftmann
parents: 48072
diff changeset
   370
        val deresolve = deresolver module_name;
39204
3d30f501b7c2 Haskell uses generic flat_program combinator
haftmann
parents: 39202
diff changeset
   371
        fun print_import module_name = (semicolon o map str) ["import qualified", module_name];
48431
6efff142bb54 restrict unqualified imports from Haskell Prelude to a small set of fundamental operations
haftmann
parents: 48072
diff changeset
   372
        val import_ps = import_common_ps @ map (print_qualified_import o fst) imports;
6efff142bb54 restrict unqualified imports from Haskell Prelude to a small set of fundamental operations
haftmann
parents: 48072
diff changeset
   373
        fun print_stmt' name = case Graph.get_node gr name
39204
3d30f501b7c2 Haskell uses generic flat_program combinator
haftmann
parents: 39202
diff changeset
   374
         of (_, NONE) => NONE
3d30f501b7c2 Haskell uses generic flat_program combinator
haftmann
parents: 39202
diff changeset
   375
          | (_, SOME stmt) => SOME (markup_stmt name (print_stmt deresolve (name, stmt)));
48431
6efff142bb54 restrict unqualified imports from Haskell Prelude to a small set of fundamental operations
haftmann
parents: 48072
diff changeset
   376
        val body_ps = map_filter print_stmt' ((flat o rev o Graph.strong_conn) gr);
39204
3d30f501b7c2 Haskell uses generic flat_program combinator
haftmann
parents: 39202
diff changeset
   377
      in
3d30f501b7c2 Haskell uses generic flat_program combinator
haftmann
parents: 39202
diff changeset
   378
        print_module_frame module_name
3d30f501b7c2 Haskell uses generic flat_program combinator
haftmann
parents: 39202
diff changeset
   379
          ((if null import_ps then [] else [Pretty.chunks import_ps]) @ body_ps)
3d30f501b7c2 Haskell uses generic flat_program combinator
haftmann
parents: 39202
diff changeset
   380
      end;
3d30f501b7c2 Haskell uses generic flat_program combinator
haftmann
parents: 39202
diff changeset
   381
3d30f501b7c2 Haskell uses generic flat_program combinator
haftmann
parents: 39202
diff changeset
   382
    (*serialization*)
3d30f501b7c2 Haskell uses generic flat_program combinator
haftmann
parents: 39202
diff changeset
   383
    fun write_module width (SOME destination) (module_name, content) =
38915
haftmann
parents: 38913
diff changeset
   384
          let
42003
6e45dc518ebb replaced File.check by specific File.check_file, File.check_dir;
wenzelm
parents: 41952
diff changeset
   385
            val _ = File.check_dir destination;
39204
3d30f501b7c2 Haskell uses generic flat_program combinator
haftmann
parents: 39202
diff changeset
   386
            val filepath = (Path.append destination o Path.ext "hs" o Path.explode o implode
3d30f501b7c2 Haskell uses generic flat_program combinator
haftmann
parents: 39202
diff changeset
   387
              o separate "/" o Long_Name.explode) module_name;
41246
e1da70df68c1 allocate intermediate directories in module hierarchy
haftmann
parents: 40804
diff changeset
   388
            val _ = Isabelle_System.mkdirs (Path.dir filepath);
39209
1ca9055ba1f7 only write ghc pragma when writing to a file
haftmann
parents: 39207
diff changeset
   389
          in
1ca9055ba1f7 only write ghc pragma when writing to a file
haftmann
parents: 39207
diff changeset
   390
            (File.write filepath o format [] width o Pretty.chunks2)
44926
de3ed037c9a5 create central list for language extensions used by the haskell code generator
noschinl
parents: 44852
diff changeset
   391
              [str language_pragma, content]
39209
1ca9055ba1f7 only write ghc pragma when writing to a file
haftmann
parents: 39207
diff changeset
   392
          end
39056
fa197571676b formal markup of generated code for statements
haftmann
parents: 39055
diff changeset
   393
      | write_module width NONE (_, content) = writeln (format [] width content);
28054
2b84d34c5d02 restructured and split code serializer module
haftmann
parents:
diff changeset
   394
  in
38916
haftmann
parents: 38915
diff changeset
   395
    Code_Target.serialization
38915
haftmann
parents: 38913
diff changeset
   396
      (fn width => fn destination => K () o map (write_module width destination))
40705
03f1266a066e toplevel deresolving for flat module name space
haftmann
parents: 39209
diff changeset
   397
      (fn present => fn width => rpair (try (deresolver ""))
48568
084cd758a8ab evaluation: allow multiple code modules
haftmann
parents: 48431
diff changeset
   398
        o (map o apsnd) (format present width))
39204
3d30f501b7c2 Haskell uses generic flat_program combinator
haftmann
parents: 39202
diff changeset
   399
      (map (uncurry print_module_frame o apsnd single) includes
3d30f501b7c2 Haskell uses generic flat_program combinator
haftmann
parents: 39202
diff changeset
   400
        @ map (fn module_name => print_module module_name (Graph.get_node haskell_program module_name))
3d30f501b7c2 Haskell uses generic flat_program combinator
haftmann
parents: 39202
diff changeset
   401
          ((flat o rev o Graph.strong_conn) haskell_program))
28054
2b84d34c5d02 restructured and split code serializer module
haftmann
parents:
diff changeset
   402
  end;
2b84d34c5d02 restructured and split code serializer module
haftmann
parents:
diff changeset
   403
38966
68853347ba37 tuned internally and made smlnj happy
haftmann
parents: 38928
diff changeset
   404
val serializer : Code_Target.serializer =
39206
303b63be1a9d moved flat_program to code_namespace
haftmann
parents: 39204
diff changeset
   405
  Code_Target.parse_args (Scan.optional (Args.$$$ "root" -- Args.colon |-- Args.name) ""
38966
68853347ba37 tuned internally and made smlnj happy
haftmann
parents: 38928
diff changeset
   406
    -- Scan.optional (Args.$$$ "string_classes" >> K true) false
68853347ba37 tuned internally and made smlnj happy
haftmann
parents: 38928
diff changeset
   407
    >> (fn (module_prefix, string_classes) =>
68853347ba37 tuned internally and made smlnj happy
haftmann
parents: 38928
diff changeset
   408
      serialize_haskell module_prefix string_classes));
68853347ba37 tuned internally and made smlnj happy
haftmann
parents: 38928
diff changeset
   409
28064
d4a6460c53d1 restructured code generation of literals
haftmann
parents: 28054
diff changeset
   410
val literals = let
d4a6460c53d1 restructured code generation of literals
haftmann
parents: 28054
diff changeset
   411
  fun char_haskell c =
d4a6460c53d1 restructured code generation of literals
haftmann
parents: 28054
diff changeset
   412
    let
d4a6460c53d1 restructured code generation of literals
haftmann
parents: 28054
diff changeset
   413
      val s = ML_Syntax.print_char c;
d4a6460c53d1 restructured code generation of literals
haftmann
parents: 28054
diff changeset
   414
    in if s = "'" then "\\'" else s end;
34944
970e1466028d code literals: distinguish numeral classes by different entries
haftmann
parents: 34269
diff changeset
   415
  fun numeral_haskell k = if k >= 0 then string_of_int k
970e1466028d code literals: distinguish numeral classes by different entries
haftmann
parents: 34269
diff changeset
   416
    else Library.enclose "(" ")" (signed_string_of_int k);
28064
d4a6460c53d1 restructured code generation of literals
haftmann
parents: 28054
diff changeset
   417
in Literals {
34178
a78b8d5b91cb take care for destructive print mode properly using dedicated pretty builders
haftmann
parents: 34085
diff changeset
   418
  literal_char = Library.enclose "'" "'" o char_haskell,
28064
d4a6460c53d1 restructured code generation of literals
haftmann
parents: 28054
diff changeset
   419
  literal_string = quote o translate_string char_haskell,
34944
970e1466028d code literals: distinguish numeral classes by different entries
haftmann
parents: 34269
diff changeset
   420
  literal_numeral = numeral_haskell,
970e1466028d code literals: distinguish numeral classes by different entries
haftmann
parents: 34269
diff changeset
   421
  literal_positive_numeral = numeral_haskell,
37958
9728342bcd56 another refinement chapter in the neverending numeral story
haftmann
parents: 37881
diff changeset
   422
  literal_alternative_numeral = numeral_haskell,
34944
970e1466028d code literals: distinguish numeral classes by different entries
haftmann
parents: 34269
diff changeset
   423
  literal_naive_numeral = numeral_haskell,
34178
a78b8d5b91cb take care for destructive print mode properly using dedicated pretty builders
haftmann
parents: 34085
diff changeset
   424
  literal_list = enum "," "[" "]",
28064
d4a6460c53d1 restructured code generation of literals
haftmann
parents: 28054
diff changeset
   425
  infix_cons = (5, ":")
d4a6460c53d1 restructured code generation of literals
haftmann
parents: 28054
diff changeset
   426
} end;
d4a6460c53d1 restructured code generation of literals
haftmann
parents: 28054
diff changeset
   427
28054
2b84d34c5d02 restructured and split code serializer module
haftmann
parents:
diff changeset
   428
2b84d34c5d02 restructured and split code serializer module
haftmann
parents:
diff changeset
   429
(** optional monad syntax **)
2b84d34c5d02 restructured and split code serializer module
haftmann
parents:
diff changeset
   430
2b84d34c5d02 restructured and split code serializer module
haftmann
parents:
diff changeset
   431
fun pretty_haskell_monad c_bind =
2b84d34c5d02 restructured and split code serializer module
haftmann
parents:
diff changeset
   432
  let
31874
f172346ba805 simplified binding concept
haftmann
parents: 31775
diff changeset
   433
    fun dest_bind t1 t2 = case Code_Thingol.split_pat_abs t2
31889
fb2c8a687529 all variable names are optional
haftmann
parents: 31888
diff changeset
   434
     of SOME ((pat, ty), t') =>
fb2c8a687529 all variable names are optional
haftmann
parents: 31888
diff changeset
   435
          SOME ((SOME ((pat, ty), true), t1), t')
28145
af3923ed4786 dropped "run" marker in monad syntax
haftmann
parents: 28064
diff changeset
   436
      | NONE => NONE;
48072
ace701efe203 prefer records with speaking labels over deeply nested tuples
haftmann
parents: 48003
diff changeset
   437
    fun dest_monad c_bind_name (IConst { name = c, ... } `$ t1 `$ t2) =
28663
bd8438543bf2 code identifier namings are no longer imperative
haftmann
parents: 28350
diff changeset
   438
          if c = c_bind_name then dest_bind t1 t2
28145
af3923ed4786 dropped "run" marker in monad syntax
haftmann
parents: 28064
diff changeset
   439
          else NONE
28663
bd8438543bf2 code identifier namings are no longer imperative
haftmann
parents: 28350
diff changeset
   440
      | dest_monad _ t = case Code_Thingol.split_let t
28145
af3923ed4786 dropped "run" marker in monad syntax
haftmann
parents: 28064
diff changeset
   441
         of SOME (((pat, ty), tbind), t') =>
31889
fb2c8a687529 all variable names are optional
haftmann
parents: 31888
diff changeset
   442
              SOME ((SOME ((pat, ty), false), tbind), t')
28145
af3923ed4786 dropped "run" marker in monad syntax
haftmann
parents: 28064
diff changeset
   443
          | NONE => NONE;
28663
bd8438543bf2 code identifier namings are no longer imperative
haftmann
parents: 28350
diff changeset
   444
    fun implode_monad c_bind_name = Code_Thingol.unfoldr (dest_monad c_bind_name);
33991
haftmann
parents: 33421
diff changeset
   445
    fun print_monad print_bind print_term (NONE, t) vars =
haftmann
parents: 33421
diff changeset
   446
          (semicolon [print_term vars NOBR t], vars)
haftmann
parents: 33421
diff changeset
   447
      | print_monad print_bind print_term (SOME ((bind, _), true), t) vars = vars
haftmann
parents: 33421
diff changeset
   448
          |> print_bind NOBR bind
haftmann
parents: 33421
diff changeset
   449
          |>> (fn p => semicolon [p, str "<-", print_term vars NOBR t])
haftmann
parents: 33421
diff changeset
   450
      | print_monad print_bind print_term (SOME ((bind, _), false), t) vars = vars
haftmann
parents: 33421
diff changeset
   451
          |> print_bind NOBR bind
37832
f8fcfc678280 braced needed in layout-insensitive syntax
haftmann
parents: 37822
diff changeset
   452
          |>> (fn p => semicolon [str "let", str "{", p, str "=", print_term vars NOBR t, str "}"]);
33991
haftmann
parents: 33421
diff changeset
   453
    fun pretty _ [c_bind'] print_term thm vars fxy [(t1, _), (t2, _)] = case dest_bind t1 t2
28145
af3923ed4786 dropped "run" marker in monad syntax
haftmann
parents: 28064
diff changeset
   454
     of SOME (bind, t') => let
31054
841c9f67f9e7 explicit type arguments in constants
haftmann
parents: 31049
diff changeset
   455
          val (binds, t'') = implode_monad c_bind' t'
33991
haftmann
parents: 33421
diff changeset
   456
          val (ps, vars') = fold_map (print_monad (gen_print_bind (K print_term) thm) print_term)
haftmann
parents: 33421
diff changeset
   457
            (bind :: binds) vars;
haftmann
parents: 33421
diff changeset
   458
        in
37833
1381665d9550 more consistent spacing in generated monadic code
haftmann
parents: 37832
diff changeset
   459
          (brackify fxy o single o enclose "do { " " }" o Pretty.breaks)
33991
haftmann
parents: 33421
diff changeset
   460
            (ps @| print_term vars' NOBR t'')
haftmann
parents: 33421
diff changeset
   461
        end
28145
af3923ed4786 dropped "run" marker in monad syntax
haftmann
parents: 28064
diff changeset
   462
      | NONE => brackify_infix (1, L) fxy
37242
97097e589715 brackify_infix etc.: no break before infix operator -- eases survival in Scala
haftmann
parents: 36960
diff changeset
   463
          (print_term vars (INFX (1, L)) t1, str ">>=", print_term vars (INFX (1, X)) t2)
31054
841c9f67f9e7 explicit type arguments in constants
haftmann
parents: 31049
diff changeset
   464
  in (2, ([c_bind], pretty)) end;
28054
2b84d34c5d02 restructured and split code serializer module
haftmann
parents:
diff changeset
   465
28145
af3923ed4786 dropped "run" marker in monad syntax
haftmann
parents: 28064
diff changeset
   466
fun add_monad target' raw_c_bind thy =
28054
2b84d34c5d02 restructured and split code serializer module
haftmann
parents:
diff changeset
   467
  let
31156
90fed3d4430f merged module code_unit.ML into code.ML
haftmann
parents: 31054
diff changeset
   468
    val c_bind = Code.read_const thy raw_c_bind;
28054
2b84d34c5d02 restructured and split code serializer module
haftmann
parents:
diff changeset
   469
  in if target = target' then
2b84d34c5d02 restructured and split code serializer module
haftmann
parents:
diff changeset
   470
    thy
38923
79d7f2b4cf71 more coherent naming of syntax data structures
haftmann
parents: 38916
diff changeset
   471
    |> Code_Target.add_const_syntax target c_bind
37881
096c8397c989 distinguish different classes of const syntax
haftmann
parents: 37833
diff changeset
   472
        (SOME (Code_Printer.complex_const_syntax (pretty_haskell_monad c_bind)))
28054
2b84d34c5d02 restructured and split code serializer module
haftmann
parents:
diff changeset
   473
  else error "Only Haskell target allows for monad syntax" end;
2b84d34c5d02 restructured and split code serializer module
haftmann
parents:
diff changeset
   474
2b84d34c5d02 restructured and split code serializer module
haftmann
parents:
diff changeset
   475
2b84d34c5d02 restructured and split code serializer module
haftmann
parents:
diff changeset
   476
(** Isar setup **)
2b84d34c5d02 restructured and split code serializer module
haftmann
parents:
diff changeset
   477
2b84d34c5d02 restructured and split code serializer module
haftmann
parents:
diff changeset
   478
val _ =
46961
5c6955f487e5 outer syntax command definitions based on formal command_spec derived from theory header declarations;
wenzelm
parents: 45009
diff changeset
   479
  Outer_Syntax.command @{command_spec "code_monad"} "define code syntax for monads"
5c6955f487e5 outer syntax command definitions based on formal command_spec derived from theory header declarations;
wenzelm
parents: 45009
diff changeset
   480
    (Parse.term_group -- Parse.name >> (fn (raw_bind, target) =>
5c6955f487e5 outer syntax command definitions based on formal command_spec derived from theory header declarations;
wenzelm
parents: 45009
diff changeset
   481
      Toplevel.theory  (add_monad target raw_bind)));
28054
2b84d34c5d02 restructured and split code serializer module
haftmann
parents:
diff changeset
   482
2b84d34c5d02 restructured and split code serializer module
haftmann
parents:
diff changeset
   483
val setup =
37821
3cbb22cec751 formal slot for code checker
haftmann
parents: 37819
diff changeset
   484
  Code_Target.add_target
38966
68853347ba37 tuned internally and made smlnj happy
haftmann
parents: 38928
diff changeset
   485
    (target, { serializer = serializer, literals = literals,
41952
c7297638599b cleanup of former settings GHC_PATH, EXEC_GHC, EXEC_OCAML, EXEC_SWIPL, EXEC_YAP -- discontinued implicit detection;
wenzelm
parents: 41940
diff changeset
   486
      check = { env_var = "ISABELLE_GHC", make_destination = I,
41940
a3b68a7a0e15 allow spaces in executable names;
wenzelm
parents: 41343
diff changeset
   487
        make_command = fn module_name =>
44926
de3ed037c9a5 create central list for language extensions used by the haskell code generator
noschinl
parents: 44852
diff changeset
   488
          "\"$ISABELLE_GHC\" " ^ language_params  ^ " -odir build -hidir build -stubdir build -e \"\" " ^
41940
a3b68a7a0e15 allow spaces in executable names;
wenzelm
parents: 41343
diff changeset
   489
            module_name ^ ".hs" } })
38923
79d7f2b4cf71 more coherent naming of syntax data structures
haftmann
parents: 38916
diff changeset
   490
  #> Code_Target.add_tyco_syntax target "fun" (SOME (2, fn print_typ => fn fxy => fn [ty1, ty2] =>
37242
97097e589715 brackify_infix etc.: no break before infix operator -- eases survival in Scala
haftmann
parents: 36960
diff changeset
   491
      brackify_infix (1, R) fxy (
33991
haftmann
parents: 33421
diff changeset
   492
        print_typ (INFX (1, X)) ty1,
28054
2b84d34c5d02 restructured and split code serializer module
haftmann
parents:
diff changeset
   493
        str "->",
33991
haftmann
parents: 33421
diff changeset
   494
        print_typ (INFX (1, R)) ty2
37242
97097e589715 brackify_infix etc.: no break before infix operator -- eases survival in Scala
haftmann
parents: 36960
diff changeset
   495
      )))
28054
2b84d34c5d02 restructured and split code serializer module
haftmann
parents:
diff changeset
   496
  #> fold (Code_Target.add_reserved target) [
2b84d34c5d02 restructured and split code serializer module
haftmann
parents:
diff changeset
   497
      "hiding", "deriving", "where", "case", "of", "infix", "infixl", "infixr",
2b84d34c5d02 restructured and split code serializer module
haftmann
parents:
diff changeset
   498
      "import", "default", "forall", "let", "in", "class", "qualified", "data",
2b84d34c5d02 restructured and split code serializer module
haftmann
parents:
diff changeset
   499
      "newtype", "instance", "if", "then", "else", "type", "as", "do", "module"
2b84d34c5d02 restructured and split code serializer module
haftmann
parents:
diff changeset
   500
    ]
48431
6efff142bb54 restrict unqualified imports from Haskell Prelude to a small set of fundamental operations
haftmann
parents: 48072
diff changeset
   501
  #> fold (Code_Target.add_reserved target) prelude_import_unqualified
6efff142bb54 restrict unqualified imports from Haskell Prelude to a small set of fundamental operations
haftmann
parents: 48072
diff changeset
   502
  #> fold (Code_Target.add_reserved target o fst) prelude_import_unqualified_constr
6efff142bb54 restrict unqualified imports from Haskell Prelude to a small set of fundamental operations
haftmann
parents: 48072
diff changeset
   503
  #> fold (fold (Code_Target.add_reserved target) o snd) prelude_import_unqualified_constr;
28054
2b84d34c5d02 restructured and split code serializer module
haftmann
parents:
diff changeset
   504
2b84d34c5d02 restructured and split code serializer module
haftmann
parents:
diff changeset
   505
end; (*struct*)