author  haftmann 
Fri, 26 Nov 2010 23:13:58 +0100  
changeset 40730  2aa0390a2da7 
parent 40564  6827505e96e1 
child 41037  6d6f23b3a879 
permissions  rwrr 
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(* Title: Tools/nbe.ML 
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Authors: Klaus Aehlig, LMU Muenchen; Tobias Nipkow, Florian Haftmann, TU Muenchen 
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Normalization by evaluation, based on generic code generator. 
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*) 
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signature NBE = 

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sig 

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val dynamic_eval_conv: conv 
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val dynamic_eval_value: theory > term > term 
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val static_eval_conv: theory > string list > conv 
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datatype Univ = 
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Const of int * Univ list (*named (uninterpreted) constants*) 
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 DFree of string * int (*free (uninterpreted) dictionary parameters*) 
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 BVar of int * Univ list 
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 Abs of (int * (Univ list > Univ)) * Univ list 
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val apps: Univ > Univ list > Univ (*explicit applications*) 
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val abss: int > (Univ list > Univ) > Univ 
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(*abstractions as closures*) 
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val eq_Univ: Univ * Univ > bool 
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val put_result: (unit > Univ list > Univ list) > Proof.context > Proof.context 
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val trace: bool Unsynchronized.ref 
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val setup: theory > theory 
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val add_const_alias: thm > theory > theory 
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end; 
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structure Nbe: NBE = 

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struct 

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(* generic nonsense *) 

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val trace = Unsynchronized.ref false; 
32544  36 
fun traced f x = if !trace then (tracing (f x); x) else x; 
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(** certificates and oracle for "trivial type classes" **) 
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33522  41 
structure Triv_Class_Data = Theory_Data 
32544  42 
( 
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type T = (class * thm) list; 

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val empty = []; 

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val extend = I; 

33522  46 
fun merge data : T = AList.merge (op =) (K true) data; 
32544  47 
); 
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fun add_const_alias thm thy = 

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let 

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val (ofclass, eqn) = case try Logic.dest_equals (Thm.prop_of thm) 

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of SOME ofclass_eq => ofclass_eq 

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 _ => error ("Bad certificate: " ^ Display.string_of_thm_global thy thm); 

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val (T, class) = case try Logic.dest_of_class ofclass 

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of SOME T_class => T_class 

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 _ => error ("Bad certificate: " ^ Display.string_of_thm_global thy thm); 

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val tvar = case try Term.dest_TVar T 

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of SOME (tvar as (_, sort)) => if null (filter (can (AxClass.get_info thy)) sort) 

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then tvar 

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else error ("Bad sort: " ^ Display.string_of_thm_global thy thm) 

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 _ => error ("Bad type: " ^ Display.string_of_thm_global thy thm); 

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val _ = if Term.add_tvars eqn [] = [tvar] then () 

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else error ("Inconsistent type: " ^ Display.string_of_thm_global thy thm); 

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val lhs_rhs = case try Logic.dest_equals eqn 

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of SOME lhs_rhs => lhs_rhs 

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 _ => error ("Not an equation: " ^ Syntax.string_of_term_global thy eqn); 

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val c_c' = case try (pairself (AxClass.unoverload_const thy o dest_Const)) lhs_rhs 
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of SOME c_c' => c_c' 
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 _ => error ("Not an equation with two constants: " 

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^ Syntax.string_of_term_global thy eqn); 

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val _ = if the_list (AxClass.class_of_param thy (snd c_c')) = [class] then () 

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else error ("Inconsistent class: " ^ Display.string_of_thm_global thy thm); 

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in Triv_Class_Data.map (AList.update (op =) (class, thm)) thy end; 

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local 

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val get_triv_classes = map fst o Triv_Class_Data.get; 

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val (_, triv_of_class) = Context.>>> (Context.map_theory_result 

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(Thm.add_oracle (Binding.name "triv_of_class", fn (thy, T, class) => 
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Thm.cterm_of thy (Logic.mk_of_class (T, class))))); 
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in 

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fun lift_triv_classes_conv thy conv ct = 

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let 

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val algebra = Sign.classes_of thy; 

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val certT = Thm.ctyp_of thy; 
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val triv_classes = get_triv_classes thy; 
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fun additional_classes sort = filter_out (fn class => Sorts.sort_le algebra (sort, [class])) triv_classes; 
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fun mk_entry (v, sort) = 
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let 
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val T = TFree (v, sort); 
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val cT = certT T; 
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val triv_sort = additional_classes sort; 
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in 
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(v, (Sorts.inter_sort algebra (sort, triv_sort), 
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(cT, AList.make (fn class => Thm.of_class (cT, class)) sort 
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@ AList.make (fn class => triv_of_class (thy, T, class)) triv_sort))) 
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end; 
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val vs_tab = map mk_entry (Term.add_tfrees (Thm.term_of ct) []); 
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fun instantiate thm = 
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let 
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val cert_tvars = map (certT o TVar) (Term.add_tvars 
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((fst o Logic.dest_equals o Logic.strip_imp_concl o Thm.prop_of) thm) []); 
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val instantiation = 
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map2 (fn cert_tvar => fn (_, (_, (cT, _))) => (cert_tvar, cT)) cert_tvars vs_tab; 
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in Thm.instantiate (instantiation, []) thm end; 
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fun of_class (TFree (v, _), class) = 
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the (AList.lookup (op =) ((snd o snd o the o AList.lookup (op =) vs_tab) v) class) 
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 of_class (T, _) = error ("Bad type " ^ Syntax.string_of_typ_global thy T); 
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fun strip_of_class thm = 
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let 

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val prems_of_class = Thm.prop_of thm 
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> Logic.strip_imp_prems 
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> map (Logic.dest_of_class #> of_class); 
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in fold Thm.elim_implies prems_of_class thm end; 
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in 
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ct 
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> (Drule.cterm_fun o map_types o map_type_tfree) 
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(fn (v, sort) => TFree (v, (fst o the o AList.lookup (op =) vs_tab) v)) 
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> conv 
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> Thm.strip_shyps 
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> Thm.varifyT_global 
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> Thm.unconstrainT 
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> instantiate 
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> strip_of_class 
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end; 

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fun lift_triv_classes_rew thy rew t = 

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let 

132 
val algebra = Sign.classes_of thy; 

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val triv_classes = get_triv_classes thy; 

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val vs = Term.add_tfrees t []; 

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in t 

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> (map_types o map_type_tfree) 

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(fn (v, sort) => TFree (v, Sorts.inter_sort algebra (sort, triv_classes))) 

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> rew 

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> (map_types o map_type_tfree) 

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(fn (v, _) => TFree (v, the (AList.lookup (op =) vs v))) 

141 
end; 

142 

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end; 

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(** the semantic universe **) 

24155  147 

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(* 

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Functions are given by their semantical function value. To avoid 

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trouble with the MLtype system, these functions have the most 

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generic type, that is "Univ list > Univ". The calling convention is 

152 
that the arguments come as a list, the last argument first. In 

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other words, a function call that usually would look like 

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f x_1 x_2 ... x_n or f(x_1,x_2, ..., x_n) 

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157 
would be in our convention called as 

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f [x_n,..,x_2,x_1] 

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Moreover, to handle functions that are still waiting for some 

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arguments we have additionally a list of arguments collected to far 

163 
and the number of arguments we're still waiting for. 

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*) 

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25204  166 
datatype Univ = 
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Const of int * Univ list (*named (uninterpreted) constants*) 
25924  168 
 DFree of string * int (*free (uninterpreted) dictionary parameters*) 
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 BVar of int * Univ list (*bound variables, named*) 
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 Abs of (int * (Univ list > Univ)) * Univ list 
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(*abstractions as closures*); 
24155  172 

35371  173 

24155  174 
(* constructor functions *) 
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25944  176 
fun abss n f = Abs ((n, f), []); 
25924  177 
fun apps (Abs ((n, f), xs)) ys = let val k = n  length ys in 
27499  178 
case int_ord (k, 0) 
179 
of EQUAL => f (ys @ xs) 

180 
 LESS => let val (zs, ws) = chop (~ k) ys in apps (f (ws @ xs)) zs end 

181 
 GREATER => Abs ((k, f), ys @ xs) (*note: reverse convention also for apps!*) 

182 
end 

25924  183 
 apps (Const (name, xs)) ys = Const (name, ys @ xs) 
27499  184 
 apps (BVar (n, xs)) ys = BVar (n, ys @ xs); 
24155  185 

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fun satisfy_abs (abs as ((n, f), xs)) some_k = 
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let 
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val ys = case some_k 
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of NONE => replicate n (BVar (0, [])) 
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 SOME k => map_range (fn l => BVar (k + l, [])) n; 
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in (apps (Abs abs) ys, ys) end; 
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fun maxidx (Const (_, xs)) = fold maxidx xs 
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 maxidx (DFree _) = I 
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 maxidx (BVar (l, xs)) = fold maxidx xs #> Integer.max (l + 1) 
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 maxidx (Abs abs) = maxidx (fst (satisfy_abs abs NONE)); 
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fun eq_Univ (Const (k, xs), Const (l, ys)) = k = l andalso eq_list eq_Univ (xs, ys) 
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 eq_Univ (DFree (s, k), DFree (t, l)) = s = t andalso k = l 
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 eq_Univ (BVar (k, xs), BVar (l, ys)) = k = l andalso eq_list eq_Univ (xs, ys) 
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 eq_Univ (x as Abs abs, y) = 
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let 
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val (x, ys) = satisfy_abs abs ((SOME o maxidx x o maxidx y) 0) 
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in eq_Univ (x, apps y ys) end 
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 eq_Univ (x, y as Abs _) = eq_Univ (y, x) 
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 eq_Univ _ = false; 
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24155  208 

209 
(** assembling and compiling ML code from terms **) 

210 

211 
(* abstract ML syntax *) 

212 

213 
infix 9 `$` `$$`; 

214 
fun e1 `$` e2 = "(" ^ e1 ^ " " ^ e2 ^ ")"; 

25101  215 
fun e `$$` [] = e 
216 
 e `$$` es = "(" ^ e ^ " " ^ space_implode " " es ^ ")"; 

24590  217 
fun ml_abs v e = "(fn " ^ v ^ " => " ^ e ^ ")"; 
24155  218 

219 
fun ml_cases t cs = 

220 
"(case " ^ t ^ " of " ^ space_implode "  " (map (fn (p, t) => p ^ " => " ^ t) cs) ^ ")"; 

25944  221 
fun ml_Let d e = "let\n" ^ d ^ " in " ^ e ^ " end"; 
28337  222 
fun ml_as v t = "(" ^ v ^ " as " ^ t ^ ")"; 
24155  223 

28350  224 
fun ml_and [] = "true" 
225 
 ml_and [x] = x 

226 
 ml_and xs = "(" ^ space_implode " andalso " xs ^ ")"; 

227 
fun ml_if b x y = "(if " ^ b ^ " then " ^ x ^ " else " ^ y ^ ")"; 

228 

24155  229 
fun ml_list es = "[" ^ commas es ^ "]"; 
230 

231 
fun ml_fundefs ([(name, [([], e)])]) = 

232 
"val " ^ name ^ " = " ^ e ^ "\n" 

233 
 ml_fundefs (eqs :: eqss) = 

234 
let 

235 
fun fundef (name, eqs) = 

236 
let 

237 
fun eqn (es, e) = name ^ " " ^ space_implode " " es ^ " = " ^ e 

238 
in space_implode "\n  " (map eqn eqs) end; 

239 
in 

240 
(prefix "fun " o fundef) eqs :: map (prefix "and " o fundef) eqss 

26931  241 
> cat_lines 
24155  242 
> suffix "\n" 
243 
end; 

244 

35371  245 

25944  246 
(* nbe specific syntax and sandbox communication *) 
247 

39399  248 
structure Univs = Proof_Data ( 
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type T = unit > Univ list > Univ list 
39399  250 
fun init _ () = error "Univs" 
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); 
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val put_result = Univs.put; 
24155  253 

254 
local 

28350  255 
val prefix = "Nbe."; 
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val name_put = prefix ^ "put_result"; 
28350  257 
val name_ref = prefix ^ "univs_ref"; 
258 
val name_const = prefix ^ "Const"; 

259 
val name_abss = prefix ^ "abss"; 

260 
val name_apps = prefix ^ "apps"; 

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val name_eq = prefix ^ "eq_Univ"; 
24155  262 
in 
263 

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val univs_cookie = (Univs.get, put_result, name_put); 
25944  265 

28337  266 
fun nbe_fun 0 "" = "nbe_value" 
267 
 nbe_fun i c = "c_" ^ translate_string (fn "." => "_"  c => c) c ^ "_" ^ string_of_int i; 

25101  268 
fun nbe_dict v n = "d_" ^ v ^ "_" ^ string_of_int n; 
24155  269 
fun nbe_bound v = "v_" ^ v; 
31888  270 
fun nbe_bound_optional NONE = "_" 
35500  271 
 nbe_bound_optional (SOME v) = nbe_bound v; 
28337  272 
fun nbe_default v = "w_" ^ v; 
24155  273 

25924  274 
(*note: these three are the "turning spots" where proper argument order is established!*) 
275 
fun nbe_apps t [] = t 

276 
 nbe_apps t ts = name_apps `$$` [t, ml_list (rev ts)]; 

28337  277 
fun nbe_apps_local i c ts = nbe_fun i c `$` ml_list (rev ts); 
278 
fun nbe_apps_constr idx_of c ts = 

279 
let 

280 
val c' = if !trace then string_of_int (idx_of c) ^ " (*" ^ c ^ "*)" 

281 
else string_of_int (idx_of c); 

282 
in name_const `$` ("(" ^ c' ^ ", " ^ ml_list (rev ts) ^ ")") end; 

25924  283 

24155  284 
fun nbe_abss 0 f = f `$` ml_list [] 
25944  285 
 nbe_abss n f = name_abss `$$` [string_of_int n, f]; 
24155  286 

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287 
fun nbe_eq (v1, v2) = "(" ^ name_eq ^ " (" ^ nbe_bound v1 ^ ", " ^ nbe_bound v2 ^ "))"; 
28350  288 

24155  289 
end; 
290 

28054  291 
open Basic_Code_Thingol; 
24155  292 

35371  293 

25865  294 
(* code generation *) 
24155  295 

26064  296 
fun assemble_eqnss idx_of deps eqnss = 
25944  297 
let 
298 
fun prep_eqns (c, (vs, eqns)) = 

25924  299 
let 
25944  300 
val dicts = maps (fn (v, sort) => map_index (nbe_dict v o fst) sort) vs; 
28337  301 
val num_args = length dicts + ((length o fst o hd) eqns); 
25944  302 
in (c, (num_args, (dicts, eqns))) end; 
303 
val eqnss' = map prep_eqns eqnss; 

304 

305 
fun assemble_constapp c dss ts = 

306 
let 

307 
val ts' = (maps o map) assemble_idict dss @ ts; 

308 
in case AList.lookup (op =) eqnss' c 

28337  309 
of SOME (num_args, _) => if num_args <= length ts' 
310 
then let val (ts1, ts2) = chop num_args ts' 

311 
in nbe_apps (nbe_apps_local 0 c ts1) ts2 

312 
end else nbe_apps (nbe_abss num_args (nbe_fun 0 c)) ts' 

25944  313 
 NONE => if member (op =) deps c 
28337  314 
then nbe_apps (nbe_fun 0 c) ts' 
315 
else nbe_apps_constr idx_of c ts' 

25924  316 
end 
25944  317 
and assemble_idict (DictConst (inst, dss)) = 
318 
assemble_constapp inst dss [] 

319 
 assemble_idict (DictVar (supers, (v, (n, _)))) = 

320 
fold_rev (fn super => assemble_constapp super [] o single) supers (nbe_dict v n); 

25924  321 

28350  322 
fun assemble_iterm constapp = 
24155  323 
let 
28350  324 
fun of_iterm match_cont t = 
25944  325 
let 
28054  326 
val (t', ts) = Code_Thingol.unfold_app t 
28350  327 
in of_iapp match_cont t' (fold_rev (cons o of_iterm NONE) ts []) end 
31049  328 
and of_iapp match_cont (IConst (c, ((_, dss), _))) ts = constapp c dss ts 
31889  329 
 of_iapp match_cont (IVar v) ts = nbe_apps (nbe_bound_optional v) ts 
31724  330 
 of_iapp match_cont ((v, _) `=> t) ts = 
31888  331 
nbe_apps (nbe_abss 1 (ml_abs (ml_list [nbe_bound_optional v]) (of_iterm NONE t))) ts 
28350  332 
 of_iapp match_cont (ICase (((t, _), cs), t0)) ts = 
333 
nbe_apps (ml_cases (of_iterm NONE t) 

334 
(map (fn (p, t) => (of_iterm NONE p, of_iterm match_cont t)) cs 

335 
@ [("_", case match_cont of SOME s => s  NONE => of_iterm NONE t0)])) ts 

25944  336 
in of_iterm end; 
24155  337 

28350  338 
fun subst_nonlin_vars args = 
339 
let 

340 
val vs = (fold o Code_Thingol.fold_varnames) 

33002  341 
(fn v => AList.map_default (op =) (v, 0) (Integer.add 1)) args []; 
28350  342 
val names = Name.make_context (map fst vs); 
343 
fun declare v k ctxt = let val vs = Name.invents ctxt v k 

344 
in (vs, fold Name.declare vs ctxt) end; 

345 
val (vs_renames, _) = fold_map (fn (v, k) => if k > 1 

346 
then declare v (k  1) #>> (fn vs => (v, vs)) 

347 
else pair (v, [])) vs names; 

348 
val samepairs = maps (fn (v, vs) => map (pair v) vs) vs_renames; 

349 
fun subst_vars (t as IConst _) samepairs = (t, samepairs) 

31889  350 
 subst_vars (t as IVar NONE) samepairs = (t, samepairs) 
351 
 subst_vars (t as IVar (SOME v)) samepairs = (case AList.lookup (op =) samepairs v 

352 
of SOME v' => (IVar (SOME v'), AList.delete (op =) v samepairs) 

28350  353 
 NONE => (t, samepairs)) 
354 
 subst_vars (t1 `$ t2) samepairs = samepairs 

355 
> subst_vars t1 

356 
>> subst_vars t2 

357 
>> (op `$) 

358 
 subst_vars (ICase (_, t)) samepairs = subst_vars t samepairs; 

359 
val (args', _) = fold_map subst_vars args samepairs; 

360 
in (samepairs, args') end; 

361 

28337  362 
fun assemble_eqn c dicts default_args (i, (args, rhs)) = 
363 
let 

364 
val is_eval = (c = ""); 

365 
val default_rhs = nbe_apps_local (i+1) c (dicts @ default_args); 

366 
val match_cont = if is_eval then NONE else SOME default_rhs; 

28350  367 
val assemble_arg = assemble_iterm 
368 
(fn c => fn _ => fn ts => nbe_apps_constr idx_of c ts) NONE; 

35371  369 
val assemble_rhs = assemble_iterm assemble_constapp match_cont; 
28350  370 
val (samepairs, args') = subst_nonlin_vars args; 
371 
val s_args = map assemble_arg args'; 

372 
val s_rhs = if null samepairs then assemble_rhs rhs 

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373 
else ml_if (ml_and (map nbe_eq samepairs)) 
28350  374 
(assemble_rhs rhs) default_rhs; 
28337  375 
val eqns = if is_eval then 
28350  376 
[([ml_list (rev (dicts @ s_args))], s_rhs)] 
28337  377 
else 
28350  378 
[([ml_list (rev (dicts @ map2 ml_as default_args s_args))], s_rhs), 
28337  379 
([ml_list (rev (dicts @ default_args))], default_rhs)] 
380 
in (nbe_fun i c, eqns) end; 

381 

25944  382 
fun assemble_eqns (c, (num_args, (dicts, eqns))) = 
383 
let 

28337  384 
val default_args = map nbe_default 
385 
(Name.invent_list [] "a" (num_args  length dicts)); 

386 
val eqns' = map_index (assemble_eqn c dicts default_args) eqns 

387 
@ (if c = "" then [] else [(nbe_fun (length eqns) c, 

388 
[([ml_list (rev (dicts @ default_args))], 

389 
nbe_apps_constr idx_of c (dicts @ default_args))])]); 

390 
in (eqns', nbe_abss num_args (nbe_fun 0 c)) end; 

24155  391 

25944  392 
val (fun_vars, fun_vals) = map_split assemble_eqns eqnss'; 
28337  393 
val deps_vars = ml_list (map (nbe_fun 0) deps); 
394 
in ml_abs deps_vars (ml_Let (ml_fundefs (flat fun_vars)) (ml_list fun_vals)) end; 

25944  395 

35371  396 

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397 
(* compile equations *) 
25944  398 

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399 
fun compile_eqnss thy nbe_program raw_deps [] = [] 
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400 
 compile_eqnss thy nbe_program raw_deps eqnss = 
24155  401 
let 
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402 
val ctxt = ProofContext.init_global thy; 
26064  403 
val (deps, deps_vals) = split_list (map_filter 
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404 
(fn dep => Option.map (fn univ => (dep, univ)) (fst ((Graph.get_node nbe_program dep)))) raw_deps); 
26064  405 
val idx_of = raw_deps 
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406 
> map (fn dep => (dep, snd (Graph.get_node nbe_program dep))) 
26064  407 
> AList.lookup (op =) 
408 
> (fn f => the o f); 

409 
val s = assemble_eqnss idx_of deps eqnss; 

24155  410 
val cs = map fst eqnss; 
25944  411 
in 
412 
s 

32544  413 
> traced (fn s => "\n code to be evaluated:\n" ^ s) 
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changeset

414 
> pair "" 
39911  415 
> Code_Runtime.value ctxt univs_cookie 
25944  416 
> (fn f => f deps_vals) 
417 
> (fn univs => cs ~~ univs) 

418 
end; 

25190  419 

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420 

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421 
(* extract equations from statements *) 
24155  422 

37437  423 
fun eqns_of_stmt (_, Code_Thingol.Fun (_, ((_, []), _))) = 
25101  424 
[] 
37437  425 
 eqns_of_stmt (const, Code_Thingol.Fun (_, (((vs, _), eqns), _))) = 
25101  426 
[(const, (vs, map fst eqns))] 
28054  427 
 eqns_of_stmt (_, Code_Thingol.Datatypecons _) = 
25101  428 
[] 
28054  429 
 eqns_of_stmt (_, Code_Thingol.Datatype _) = 
25101  430 
[] 
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haftmann
parents:
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431 
 eqns_of_stmt (class, Code_Thingol.Class (_, (v, (super_classes, classparams)))) = 
25101  432 
let 
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433 
val names = map snd super_classes @ map fst classparams; 
25101  434 
val params = Name.invent_list [] "d" (length names); 
435 
fun mk (k, name) = 

436 
(name, ([(v, [])], 

31889  437 
[([IConst (class, (([], []), [])) `$$ map (IVar o SOME) params], 
438 
IVar (SOME (nth params k)))])); 

25101  439 
in map_index mk names end 
28054  440 
 eqns_of_stmt (_, Code_Thingol.Classrel _) = 
25101  441 
[] 
28054  442 
 eqns_of_stmt (_, Code_Thingol.Classparam _) = 
25101  443 
[] 
37449  444 
 eqns_of_stmt (inst, Code_Thingol.Classinst ((class, (_, arity_args)), (super_instances, (classparam_instances, _)))) = 
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changeset

445 
[(inst, (arity_args, [([], IConst (class, (([], []), [])) `$$ 
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diff
changeset

446 
map (fn (_, (_, (inst, dss))) => IConst (inst, (([], dss), []))) super_instances 
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changeset

447 
@ map (IConst o snd o fst) classparam_instances)]))]; 
24155  448 

39392
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changeset

449 

7a0fcee7a2a3
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450 
(* compile whole programs *) 
7a0fcee7a2a3
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451 

39399  452 
fun ensure_const_idx name (nbe_program, (maxidx, idx_tab)) = 
453 
if can (Graph.get_node nbe_program) name 

454 
then (nbe_program, (maxidx, idx_tab)) 

455 
else (Graph.new_node (name, (NONE, maxidx)) nbe_program, 

456 
(maxidx + 1, Inttab.update_new (maxidx, name) idx_tab)); 

457 

39392
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458 
fun compile_stmts thy stmts_deps = 
25101  459 
let 
460 
val names = map (fst o fst) stmts_deps; 

461 
val names_deps = map (fn ((name, _), deps) => (name, deps)) stmts_deps; 

462 
val eqnss = maps (eqns_of_stmt o fst) stmts_deps; 

26064  463 
val refl_deps = names_deps 
25190  464 
> maps snd 
465 
> distinct (op =) 

26064  466 
> fold (insert (op =)) names; 
39392
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haftmann
parents:
39388
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changeset

467 
fun compile nbe_program = eqnss 
7a0fcee7a2a3
more clear separation of static compilation and dynamic evaluation
haftmann
parents:
39388
diff
changeset

468 
> compile_eqnss thy nbe_program refl_deps 
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more clear separation of static compilation and dynamic evaluation
haftmann
parents:
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diff
changeset

469 
> rpair nbe_program; 
25101  470 
in 
39399  471 
fold ensure_const_idx refl_deps 
26064  472 
#> apfst (fold (fn (name, deps) => fold (curry Graph.add_edge name) deps) names_deps 
473 
#> compile 

474 
#> fold (fn (name, univ) => (Graph.map_node name o apfst) (K (SOME univ)))) 

25101  475 
end; 
24155  476 

39392
7a0fcee7a2a3
more clear separation of static compilation and dynamic evaluation
haftmann
parents:
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diff
changeset

477 
fun compile_program thy program = 
25101  478 
let 
39392
7a0fcee7a2a3
more clear separation of static compilation and dynamic evaluation
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diff
changeset

479 
fun add_stmts names (nbe_program, (maxidx, idx_tab)) = if exists ((can o Graph.get_node) nbe_program) names 
7a0fcee7a2a3
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haftmann
parents:
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diff
changeset

480 
then (nbe_program, (maxidx, idx_tab)) 
7a0fcee7a2a3
more clear separation of static compilation and dynamic evaluation
haftmann
parents:
39388
diff
changeset

481 
else (nbe_program, (maxidx, idx_tab)) 
7a0fcee7a2a3
more clear separation of static compilation and dynamic evaluation
haftmann
parents:
39388
diff
changeset

482 
> compile_stmts thy (map (fn name => ((name, Graph.get_node program name), 
27103  483 
Graph.imm_succs program name)) names); 
28706  484 
in 
485 
fold_rev add_stmts (Graph.strong_conn program) 

486 
end; 

24155  487 

25944  488 

489 
(** evaluation **) 

490 

39392
7a0fcee7a2a3
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haftmann
parents:
39388
diff
changeset

491 
(* term evaluation by compilation *) 
25944  492 

39392
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haftmann
parents:
39388
diff
changeset

493 
fun compile_term thy nbe_program deps (vs : (string * sort) list, t) = 
25924  494 
let 
495 
val dict_frees = maps (fn (v, sort) => map_index (curry DFree v o fst) sort) vs; 

496 
in 

31064  497 
("", (vs, [([], t)])) 
39392
7a0fcee7a2a3
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haftmann
parents:
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diff
changeset

498 
> singleton (compile_eqnss thy nbe_program deps) 
25924  499 
> snd 
31064  500 
> (fn t => apps t (rev dict_frees)) 
25924  501 
end; 
24155  502 

35371  503 

39392
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more clear separation of static compilation and dynamic evaluation
haftmann
parents:
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diff
changeset

504 
(* reconstruction *) 
24155  505 

30947  506 
fun typ_of_itype program vs (ityco `%% itys) = 
507 
let 

508 
val Code_Thingol.Datatype (tyco, _) = Graph.get_node program ityco; 

509 
in Type (tyco, map (typ_of_itype program vs) itys) end 

510 
 typ_of_itype program vs (ITyVar v) = 

511 
let 

512 
val sort = (the o AList.lookup (op =) vs) v; 

513 
in TFree ("'" ^ v, sort) end; 

514 

28663
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haftmann
parents:
28423
diff
changeset

515 
fun term_of_univ thy program idx_tab t = 
24155  516 
let 
25101  517 
fun take_until f [] = [] 
518 
 take_until f (x::xs) = if f x then [] else x :: take_until f xs; 

28663
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code identifier namings are no longer imperative
haftmann
parents:
28423
diff
changeset

519 
fun is_dict (Const (idx, _)) = (case (Graph.get_node program o the o Inttab.lookup idx_tab) idx 
bd8438543bf2
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haftmann
parents:
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diff
changeset

520 
of Code_Thingol.Class _ => true 
bd8438543bf2
code identifier namings are no longer imperative
haftmann
parents:
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diff
changeset

521 
 Code_Thingol.Classrel _ => true 
bd8438543bf2
code identifier namings are no longer imperative
haftmann
parents:
28423
diff
changeset

522 
 Code_Thingol.Classinst _ => true 
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code identifier namings are no longer imperative
haftmann
parents:
28423
diff
changeset

523 
 _ => false) 
25101  524 
 is_dict (DFree _) = true 
525 
 is_dict _ = false; 

28663
bd8438543bf2
code identifier namings are no longer imperative
haftmann
parents:
28423
diff
changeset

526 
fun const_of_idx idx = (case (Graph.get_node program o the o Inttab.lookup idx_tab) idx 
35371  527 
of Code_Thingol.Fun (c, _) => c 
528 
 Code_Thingol.Datatypecons (c, _) => c 

529 
 Code_Thingol.Classparam (c, _) => c); 

24155  530 
fun of_apps bounds (t, ts) = 
531 
fold_map (of_univ bounds) ts 

532 
#>> (fn ts' => list_comb (t, rev ts')) 

26064  533 
and of_univ bounds (Const (idx, ts)) typidx = 
24155  534 
let 
25101  535 
val ts' = take_until is_dict ts; 
28663
bd8438543bf2
code identifier namings are no longer imperative
haftmann
parents:
28423
diff
changeset

536 
val c = const_of_idx idx; 
31957  537 
val T = map_type_tvar (fn ((v, i), _) => 
37145
01aa36932739
renamed structure TypeInfer to Type_Infer, keeping the old name as legacy alias for some time;
wenzelm
parents:
36982
diff
changeset

538 
Type_Infer.param typidx (v ^ string_of_int i, [])) 
31957  539 
(Sign.the_const_type thy c); 
30022
1d8b8fa19074
maintain order of constructors in datatypes; clarified conventions for type schemes
haftmann
parents:
29272
diff
changeset

540 
val typidx' = typidx + 1; 
31957  541 
in of_apps bounds (Term.Const (c, T), ts') typidx' end 
27499  542 
 of_univ bounds (BVar (n, ts)) typidx = 
543 
of_apps bounds (Bound (bounds  n  1), ts) typidx 

24155  544 
 of_univ bounds (t as Abs _) typidx = 
545 
typidx 

25924  546 
> of_univ (bounds + 1) (apps t [BVar (bounds, [])]) 
24155  547 
> (fn t' => pair (Term.Abs ("u", dummyT, t'))) 
548 
in of_univ 0 t 0 > fst end; 

549 

35371  550 

39392
7a0fcee7a2a3
more clear separation of static compilation and dynamic evaluation
haftmann
parents:
39388
diff
changeset

551 
(* evaluation with type reconstruction *) 
7a0fcee7a2a3
more clear separation of static compilation and dynamic evaluation
haftmann
parents:
39388
diff
changeset

552 

7a0fcee7a2a3
more clear separation of static compilation and dynamic evaluation
haftmann
parents:
39388
diff
changeset

553 
fun eval_term thy program (nbe_program, idx_tab) ((vs0, (vs, ty)), t) deps = 
7a0fcee7a2a3
more clear separation of static compilation and dynamic evaluation
haftmann
parents:
39388
diff
changeset

554 
let 
7a0fcee7a2a3
more clear separation of static compilation and dynamic evaluation
haftmann
parents:
39388
diff
changeset

555 
val ctxt = Syntax.init_pretty_global thy; 
7a0fcee7a2a3
more clear separation of static compilation and dynamic evaluation
haftmann
parents:
39388
diff
changeset

556 
val string_of_term = Syntax.string_of_term (Config.put show_types true ctxt); 
7a0fcee7a2a3
more clear separation of static compilation and dynamic evaluation
haftmann
parents:
39388
diff
changeset

557 
val ty' = typ_of_itype program vs0 ty; 
7a0fcee7a2a3
more clear separation of static compilation and dynamic evaluation
haftmann
parents:
39388
diff
changeset

558 
fun type_infer t = singleton 
7a0fcee7a2a3
more clear separation of static compilation and dynamic evaluation
haftmann
parents:
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diff
changeset

559 
(Type_Infer.infer_types ctxt (try (Type.strip_sorts o Sign.the_const_type thy)) (K NONE)) 
7a0fcee7a2a3
more clear separation of static compilation and dynamic evaluation
haftmann
parents:
39388
diff
changeset

560 
(Type.constraint ty' t); 
7a0fcee7a2a3
more clear separation of static compilation and dynamic evaluation
haftmann
parents:
39388
diff
changeset

561 
fun check_tvars t = 
7a0fcee7a2a3
more clear separation of static compilation and dynamic evaluation
haftmann
parents:
39388
diff
changeset

562 
if null (Term.add_tvars t []) then t 
7a0fcee7a2a3
more clear separation of static compilation and dynamic evaluation
haftmann
parents:
39388
diff
changeset

563 
else error ("Illegal schematic type variables in normalized term: " ^ string_of_term t); 
7a0fcee7a2a3
more clear separation of static compilation and dynamic evaluation
haftmann
parents:
39388
diff
changeset

564 
in 
7a0fcee7a2a3
more clear separation of static compilation and dynamic evaluation
haftmann
parents:
39388
diff
changeset

565 
compile_term thy nbe_program deps (vs, t) 
7a0fcee7a2a3
more clear separation of static compilation and dynamic evaluation
haftmann
parents:
39388
diff
changeset

566 
> term_of_univ thy program idx_tab 
7a0fcee7a2a3
more clear separation of static compilation and dynamic evaluation
haftmann
parents:
39388
diff
changeset

567 
> traced (fn t => "Normalized:\n" ^ string_of_term t) 
7a0fcee7a2a3
more clear separation of static compilation and dynamic evaluation
haftmann
parents:
39388
diff
changeset

568 
> type_infer 
7a0fcee7a2a3
more clear separation of static compilation and dynamic evaluation
haftmann
parents:
39388
diff
changeset

569 
> traced (fn t => "Types inferred:\n" ^ string_of_term t) 
7a0fcee7a2a3
more clear separation of static compilation and dynamic evaluation
haftmann
parents:
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changeset

570 
> check_tvars 
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571 
> traced (fn _ => "\n") 
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haftmann
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572 
end; 
7a0fcee7a2a3
more clear separation of static compilation and dynamic evaluation
haftmann
parents:
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diff
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573 

39436  574 

25101  575 
(* function store *) 
576 

34173
458ced35abb8
reduced code generator cache to the baremost minimum
haftmann
parents:
33522
diff
changeset

577 
structure Nbe_Functions = Code_Data 
25101  578 
( 
35500  579 
type T = (Univ option * int) Graph.T * (int * string Inttab.table); 
580 
val empty = (Graph.empty, (0, Inttab.empty)); 

25101  581 
); 
582 

39399  583 
fun compile ignore_cache thy program = 
24155  584 
let 
39392
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haftmann
parents:
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diff
changeset

585 
val (nbe_program, (_, idx_tab)) = 
39399  586 
Nbe_Functions.change (if ignore_cache then NONE else SOME thy) 
587 
(compile_program thy program); 

39392
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parents:
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diff
changeset

588 
in (nbe_program, idx_tab) end; 
24155  589 

32544  590 

39396  591 
(* dynamic evaluation oracle *) 
24155  592 

30947  593 
fun mk_equals thy lhs raw_rhs = 
26747
f32fa5f5bdd1
moved 'trivial classes' to foundation of code generator
haftmann
parents:
26739
diff
changeset

594 
let 
30947  595 
val ty = Thm.typ_of (Thm.ctyp_of_term lhs); 
596 
val eq = Thm.cterm_of thy (Term.Const ("==", ty > ty > propT)); 

597 
val rhs = Thm.cterm_of thy raw_rhs; 

598 
in Thm.mk_binop eq lhs rhs end; 

26747
f32fa5f5bdd1
moved 'trivial classes' to foundation of code generator
haftmann
parents:
26739
diff
changeset

599 

38669
9ff76d0f0610
refined and unified naming convention for dynamic code evaluation techniques
haftmann
parents:
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diff
changeset

600 
val (_, raw_oracle) = Context.>>> (Context.map_theory_result 
39399  601 
(Thm.add_oracle (Binding.name "normalization_by_evaluation", 
602 
fn (thy, program, nbe_program_idx_tab, vsp_ty_t, deps, ct) => 

603 
mk_equals thy ct (eval_term thy program nbe_program_idx_tab vsp_ty_t deps)))); 

31064  604 

39399  605 
fun oracle thy program nbe_program_idx_tab vsp_ty_t deps ct = 
606 
raw_oracle (thy, program, nbe_program_idx_tab, vsp_ty_t, deps, ct); 

30942
1e246776f876
diagnostic commands now in code_thingol; tuned code of funny continuations
haftmann
parents:
30672
diff
changeset

607 

39606
7af0441a3a47
no_frees_* is subsumed by new framework mechanisms in Code_Preproc
haftmann
parents:
39475
diff
changeset

608 
val dynamic_eval_conv = Conv.tap_thy (fn thy => 
7af0441a3a47
no_frees_* is subsumed by new framework mechanisms in Code_Preproc
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parents:
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diff
changeset

609 
lift_triv_classes_conv thy (Code_Thingol.dynamic_eval_conv thy 
7af0441a3a47
no_frees_* is subsumed by new framework mechanisms in Code_Preproc
haftmann
parents:
39475
diff
changeset

610 
(K (fn program => oracle thy program (compile false thy program))))); 
24155  611 

38669
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refined and unified naming convention for dynamic code evaluation techniques
haftmann
parents:
37449
diff
changeset

612 
fun dynamic_eval_value thy = lift_triv_classes_rew thy 
39606
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no_frees_* is subsumed by new framework mechanisms in Code_Preproc
haftmann
parents:
39475
diff
changeset

613 
(Code_Thingol.dynamic_eval_value thy I 
7af0441a3a47
no_frees_* is subsumed by new framework mechanisms in Code_Preproc
haftmann
parents:
39475
diff
changeset

614 
(K (fn program => eval_term thy program (compile false thy program)))); 
39399  615 

39606
7af0441a3a47
no_frees_* is subsumed by new framework mechanisms in Code_Preproc
haftmann
parents:
39475
diff
changeset

616 
fun static_eval_conv thy consts = 
7af0441a3a47
no_frees_* is subsumed by new framework mechanisms in Code_Preproc
haftmann
parents:
39475
diff
changeset

617 
lift_triv_classes_conv thy (Code_Thingol.static_eval_conv thy consts 
39475  618 
(K (fn program => let val nbe_program = compile true thy program 
39606
7af0441a3a47
no_frees_* is subsumed by new framework mechanisms in Code_Preproc
haftmann
parents:
39475
diff
changeset

619 
in fn thy => oracle thy program nbe_program end))); 
24839  620 

35371  621 

39396  622 
(** setup **) 
24155  623 

38669
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haftmann
parents:
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diff
changeset

624 
val setup = Value.add_evaluator ("nbe", dynamic_eval_value o ProofContext.theory_of); 
24155  625 

626 
end; 

28337  627 