src/Pure/library.ML
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(*  Title:      Pure/library.ML
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    ID:         $Id$
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    Author:     Lawrence C Paulson, Cambridge University Computer Laboratory
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    Copyright   1992  University of Cambridge
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Basic library: functions, options, pairs, booleans, lists, integers,
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strings, lists as sets, association lists, generic tables, balanced trees,
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orders, input / output, timing, filenames, misc functions.
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*)
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infix |> ~~ \ \\ orelf ins ins_string ins_int orf andf prefix upto downto
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      mem mem_int mem_string union union_int union_string  
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      inter inter_int inter_string subset subset_int subset_string subdir_of;
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structure Library =
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struct
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(** functions **)
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(*handy combinators*)
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fun curry f x y = f (x, y);
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fun uncurry f (x, y) = f x y;
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fun I x = x;
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fun K x y = x;
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(*reverse apply*)
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fun (x |> f) = f x;
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(*combine two functions forming the union of their domains*)
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fun (f orelf g) = fn x => f x handle Match => g x;
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(*application of (infix) operator to its left or right argument*)
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fun apl (x, f) y = f (x, y);
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fun apr (f, y) x = f (x, y);
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(*functional for pairs*)
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fun pairself f (x, y) = (f x, f y);
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(*function exponentiation: f(...(f x)...) with n applications of f*)
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fun funpow n f x =
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  let fun rep (0, x) = x
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        | rep (n, x) = rep (n - 1, f x)
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  in rep (n, x) end;
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(** stamps **)
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type stamp = unit ref;
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val stamp: unit -> stamp = ref;
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(** options **)
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datatype 'a option = None | Some of 'a;
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exception OPTION of string;
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fun the (Some x) = x
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  | the None = raise OPTION "the";
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fun if_none None y = y
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  | if_none (Some x) _ = x;
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fun is_some (Some _) = true
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  | is_some None = false;
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fun is_none (Some _) = false
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  | is_none None = true;
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fun apsome f (Some x) = Some (f x)
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  | apsome _ None = None;
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(** pairs **)
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fun pair x y = (x, y);
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fun rpair x y = (y, x);
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fun fst (x, y) = x;
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fun snd (x, y) = y;
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fun eq_fst ((x1, _), (x2, _)) = x1 = x2;
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fun eq_snd ((_, y1), (_, y2)) = y1 = y2;
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fun swap (x, y) = (y, x);
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(*apply the function to a component of a pair*)
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fun apfst f (x, y) = (f x, y);
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fun apsnd f (x, y) = (x, f y);
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(** booleans **)
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(* equality *)
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fun equal x y = x = y;
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fun not_equal x y = x <> y;
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(* operators for combining predicates *)
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fun (p orf q) = fn x => p x orelse q x;
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fun (p andf q) = fn x => p x andalso q x;
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fun notf p x = not (p x);
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(* predicates on lists *)
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fun orl [] = false
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  | orl (x :: xs) = x orelse orl xs;
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fun andl [] = true
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  | andl (x :: xs) = x andalso andl xs;
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(*Several object-logics declare theories named List or Option, hiding the
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  eponymous basis library structures.*)
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structure List_ = List
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and       Option_ = Option;
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(*exists pred [x1, ..., xn] ===> pred x1 orelse ... orelse pred xn*)
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fun exists (pred: 'a -> bool) : 'a list -> bool =
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  let fun boolf [] = false
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        | boolf (x :: xs) = pred x orelse boolf xs
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  in boolf end;
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(*forall pred [x1, ..., xn] ===> pred x1 andalso ... andalso pred xn*)
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fun forall (pred: 'a -> bool) : 'a list -> bool =
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  let fun boolf [] = true
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        | boolf (x :: xs) = pred x andalso boolf xs
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  in boolf end;
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(* flags *)
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fun set flag = (flag := true; true);
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fun reset flag = (flag := false; false);
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fun toggle flag = (flag := not (! flag); ! flag);
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fun setmp flag value f x =
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  let
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    val orig_value = ! flag;
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    fun return y = (flag := orig_value; y);
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  in
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    flag := value;
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    return (f x handle exn => (return (); raise exn))
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  end;
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(** lists **)
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exception LIST of string;
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fun null [] = true
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  | null (_ :: _) = false;
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fun hd [] = raise LIST "hd"
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  | hd (x :: _) = x;
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fun tl [] = raise LIST "tl"
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  | tl (_ :: xs) = xs;
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fun cons x xs = x :: xs;
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(* fold *)
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(*the following versions of fold are designed to fit nicely with infixes*)
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(*  (op @) (e, [x1, ..., xn])  ===>  ((e @ x1) @ x2) ... @ xn
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    for operators that associate to the left (TAIL RECURSIVE)*)
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fun foldl (f: 'a * 'b -> 'a) : 'a * 'b list -> 'a =
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  let fun itl (e, [])  = e
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        | itl (e, a::l) = itl (f(e, a), l)
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  in  itl end;
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(*  (op @) ([x1, ..., xn], e)  ===>   x1 @ (x2 ... @ (xn @ e))
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    for operators that associate to the right (not tail recursive)*)
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fun foldr f (l, e) =
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  let fun itr [] = e
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        | itr (a::l) = f(a, itr l)
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  in  itr l  end;
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(*  (op @) [x1, ..., xn]  ===>   x1 @ (x2 ... @ (x[n-1] @ xn))
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    for n > 0, operators that associate to the right (not tail recursive)*)
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fun foldr1 f l =
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  let fun itr [x] = x                       (* FIXME [] case: elim warn (?) *)
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        | itr (x::l) = f(x, itr l)
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  in  itr l  end;
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(* basic list functions *)
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(*length of a list, should unquestionably be a standard function*)
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local fun length1 (n, [])  = n   (*TAIL RECURSIVE*)
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        | length1 (n, x :: xs) = length1 (n + 1, xs)
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in  fun length l = length1 (0, l) end;
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(*take the first n elements from a list*)
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fun take (n, []) = []
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  | take (n, x :: xs) =
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      if n > 0 then x :: take (n - 1, xs) else [];
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(*drop the first n elements from a list*)
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fun drop (n, []) = []
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  | drop (n, x :: xs) =
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      if n > 0 then drop (n - 1, xs) else x :: xs;
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(*return nth element of a list, where 0 designates the first element;
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  raise EXCEPTION if list too short*)
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fun nth_elem NL =
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  (case drop NL of
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    [] => raise LIST "nth_elem"
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  | x :: _ => x);
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(*last element of a list*)
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fun last_elem [] = raise LIST "last_elem"
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  | last_elem [x] = x
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  | last_elem (_ :: xs) = last_elem xs;
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(*rear decomposition*)
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fun split_last [] = raise LIST "split_last"
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  | split_last [x] = ([], x)
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  | split_last (x :: xs) = apfst (cons x) (split_last xs);
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(*find the position of an element in a list*)
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fun find (x, ys) =
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  let fun f (y :: ys, i) = if x = y then i else f (ys, i + 1)
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        | f (_, _) = raise LIST "find"
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  in f (ys, 0) end;
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(*flatten a list of lists to a list*)
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fun flat (ls: 'c list list) : 'c list = foldr (op @) (ls, []);
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(*like Lisp's MAPC -- seq proc [x1, ..., xn] evaluates
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  (proc x1; ...; proc xn) for side effects*)
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fun seq (proc: 'a -> unit) : 'a list -> unit =
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  let fun seqf [] = ()
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        | seqf (x :: xs) = (proc x; seqf xs)
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  in seqf end;
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(*separate s [x1, x2, ..., xn]  ===>  [x1, s, x2, s, ..., s, xn]*)
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fun separate s (x :: (xs as _ :: _)) = x :: s :: separate s xs
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  | separate _ xs = xs;
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(*make the list [x, x, ..., x] of length n*)
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fun replicate n (x: 'a) : 'a list =
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  let fun rep (0, xs) = xs
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        | rep (n, xs) = rep (n - 1, x :: xs)
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  in
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    if n < 0 then raise LIST "replicate"
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    else rep (n, [])
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  end;
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(* filter *)
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(*copy the list preserving elements that satisfy the predicate*)
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fun filter (pred: 'a->bool) : 'a list -> 'a list =
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  let fun filt [] = []
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        | filt (x :: xs) = if pred x then x :: filt xs else filt xs
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  in filt end;
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fun filter_out f = filter (not o f);
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fun mapfilter (f: 'a -> 'b option) ([]: 'a list) = [] : 'b list
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  | mapfilter f (x :: xs) =
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      (case f x of
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        None => mapfilter f xs
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      | Some y => y :: mapfilter f xs);
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fun find_first _ [] = None
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  | find_first pred (x :: xs) =
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      if pred x then Some x else find_first pred xs;
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(* lists of pairs *)
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fun map2 _ ([], []) = []
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  | map2 f (x :: xs, y :: ys) = (f (x, y) :: map2 f (xs, ys))
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  | map2 _ _ = raise LIST "map2";
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fun exists2 _ ([], []) = false
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  | exists2 pred (x :: xs, y :: ys) = pred (x, y) orelse exists2 pred (xs, ys)
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  | exists2 _ _ = raise LIST "exists2";
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fun forall2 _ ([], []) = true
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  | forall2 pred (x :: xs, y :: ys) = pred (x, y) andalso forall2 pred (xs, ys)
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  | forall2 _ _ = raise LIST "forall2";
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(*combine two lists forming a list of pairs:
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  [x1, ..., xn] ~~ [y1, ..., yn]  ===>  [(x1, y1), ..., (xn, yn)]*)
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fun [] ~~ [] = []
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  | (x :: xs) ~~ (y :: ys) = (x, y) :: (xs ~~ ys)
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  | _ ~~ _ = raise LIST "~~";
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(*inverse of ~~; the old 'split':
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  [(x1, y1), ..., (xn, yn)]  ===>  ([x1, ..., xn], [y1, ..., yn])*)
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fun split_list (l: ('a * 'b) list) = (map #1 l, map #2 l);
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(* prefixes, suffixes *)
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fun [] prefix _ = true
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  | (x :: xs) prefix (y :: ys) = x = y andalso (xs prefix ys)
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  | _ prefix _ = false;
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(* [x1, ..., xi, ..., xn]  --->  ([x1, ..., x(i-1)], [xi, ..., xn])
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   where xi is the first element that does not satisfy the predicate*)
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fun take_prefix (pred : 'a -> bool)  (xs: 'a list) : 'a list * 'a list =
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  let fun take (rxs, []) = (rev rxs, [])
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        | take (rxs, x :: xs) =
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            if  pred x  then  take(x :: rxs, xs)  else  (rev rxs, x :: xs)
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  in  take([], xs)  end;
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(* [x1, ..., xi, ..., xn]  --->  ([x1, ..., xi], [x(i+1), ..., xn])
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   where xi is the last element that does not satisfy the predicate*)
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fun take_suffix _ [] = ([], [])
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  | take_suffix pred (x :: xs) =
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      (case take_suffix pred xs of
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        ([], sffx) => if pred x then ([], x :: sffx) else ([x], sffx)
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      | (prfx, sffx) => (x :: prfx, sffx));
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(** integers **)
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parents: 205
diff changeset
   340
2958
7837471d2f27 improved inc, dec;
wenzelm
parents: 2806
diff changeset
   341
fun inc i = (i := ! i + 1; ! i);
7837471d2f27 improved inc, dec;
wenzelm
parents: 2806
diff changeset
   342
fun dec i = (i := ! i - 1; ! i);
233
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   343
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   344
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   345
(* lists of integers *)
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wenzelm
parents: 205
diff changeset
   346
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   347
(*make the list [from, from + 1, ..., to]*)
2175
21fde76bc742 Updated syntax; shortened comments; put in monomorphic versions of ins
paulson
parents: 2157
diff changeset
   348
fun (from upto to) =
233
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   349
  if from > to then [] else from :: ((from + 1) upto to);
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wenzelm
parents: 205
diff changeset
   350
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   351
(*make the list [from, from - 1, ..., to]*)
2175
21fde76bc742 Updated syntax; shortened comments; put in monomorphic versions of ins
paulson
parents: 2157
diff changeset
   352
fun (from downto to) =
233
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   353
  if from < to then [] else from :: ((from - 1) downto to);
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wenzelm
parents: 205
diff changeset
   354
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   355
(*predicate: downto0 (is, n) <=> is = [n, n - 1, ..., 0]*)
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   356
fun downto0 (i :: is, n) = i = n andalso downto0 (is, n - 1)
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wenzelm
parents: 205
diff changeset
   357
  | downto0 ([], n) = n = ~1;
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   358
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   359
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   360
(* convert integers to strings *)
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   361
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   362
(*expand the number in the given base;
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wenzelm
parents: 205
diff changeset
   363
  example: radixpand (2, 8) gives [1, 0, 0, 0]*)
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wenzelm
parents: 205
diff changeset
   364
fun radixpand (base, num) : int list =
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wenzelm
parents: 205
diff changeset
   365
  let
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wenzelm
parents: 205
diff changeset
   366
    fun radix (n, tail) =
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wenzelm
parents: 205
diff changeset
   367
      if n < base then n :: tail
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   368
      else radix (n div base, (n mod base) :: tail)
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   369
  in radix (num, []) end;
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wenzelm
parents: 205
diff changeset
   370
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   371
(*expands a number into a string of characters starting from "zerochar";
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wenzelm
parents: 205
diff changeset
   372
  example: radixstring (2, "0", 8) gives "1000"*)
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wenzelm
parents: 205
diff changeset
   373
fun radixstring (base, zerochar, num) =
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wenzelm
parents: 205
diff changeset
   374
  let val offset = ord zerochar;
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wenzelm
parents: 205
diff changeset
   375
      fun chrof n = chr (offset + n)
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   376
  in implode (map chrof (radixpand (base, num))) end;
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   377
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   378
3407
afd288caf573 Removal of radixstring from string_of_int; addition of string_of_indexname
paulson
parents: 3393
diff changeset
   379
val string_of_int = Int.toString;
233
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   380
3407
afd288caf573 Removal of radixstring from string_of_int; addition of string_of_indexname
paulson
parents: 3393
diff changeset
   381
fun string_of_indexname (a,0) = a
afd288caf573 Removal of radixstring from string_of_int; addition of string_of_indexname
paulson
parents: 3393
diff changeset
   382
  | string_of_indexname (a,i) = a ^ "_" ^ Int.toString i;
233
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   383
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   384
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   385
(** strings **)
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wenzelm
parents: 205
diff changeset
   386
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   387
fun is_letter ch =
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wenzelm
parents: 205
diff changeset
   388
  ord "A" <= ord ch andalso ord ch <= ord "Z" orelse
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   389
  ord "a" <= ord ch andalso ord ch <= ord "z";
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   390
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   391
fun is_digit ch =
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wenzelm
parents: 205
diff changeset
   392
  ord "0" <= ord ch andalso ord ch <= ord "9";
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   393
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   394
(*letter or _ or prime (')*)
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   395
fun is_quasi_letter "_" = true
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   396
  | is_quasi_letter "'" = true
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   397
  | is_quasi_letter ch = is_letter ch;
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   398
512
55755ed9fab9 Pure/library/enclose, Pure/Syntax/pretty/enclose: renamed from parents
lcp
parents: 410
diff changeset
   399
(*white space: blanks, tabs, newlines, formfeeds*)
233
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   400
val is_blank : string -> bool =
3393
e31ac367387e is_blank: fixed space2;
wenzelm
parents: 3365
diff changeset
   401
  fn " " => true | "\t" => true | "\n" => true | "\^L" => true | "\160" => true
3063
963e3bf01799 is_blank: added space2 (160);
wenzelm
parents: 2978
diff changeset
   402
    | _ => false;
233
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   403
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   404
val is_letdig = is_quasi_letter orf is_digit;
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   405
2196
1b36ebc70487 added is_printable: string -> bool;
wenzelm
parents: 2182
diff changeset
   406
(*printable chars*)
1b36ebc70487 added is_printable: string -> bool;
wenzelm
parents: 2182
diff changeset
   407
fun is_printable c = ord c > ord " " andalso ord c <= ord "~";
1b36ebc70487 added is_printable: string -> bool;
wenzelm
parents: 2182
diff changeset
   408
233
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   409
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   410
(*lower all chars of string*)
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   411
val to_lower =
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   412
  let
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   413
    fun lower ch =
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   414
      if ch >= "A" andalso ch <= "Z" then
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   415
        chr (ord ch - ord "A" + ord "a")
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   416
      else ch;
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   417
  in implode o (map lower) o explode end;
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   418
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   419
512
55755ed9fab9 Pure/library/enclose, Pure/Syntax/pretty/enclose: renamed from parents
lcp
parents: 410
diff changeset
   420
(*enclose in brackets*)
55755ed9fab9 Pure/library/enclose, Pure/Syntax/pretty/enclose: renamed from parents
lcp
parents: 410
diff changeset
   421
fun enclose lpar rpar str = lpar ^ str ^ rpar;
255
ee132db91681 added if_none, parents, commas, gen_duplicates, duplicates, assoc2;
wenzelm
parents: 245
diff changeset
   422
233
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   423
(*simple quoting (does not escape special chars)*)
512
55755ed9fab9 Pure/library/enclose, Pure/Syntax/pretty/enclose: renamed from parents
lcp
parents: 410
diff changeset
   424
val quote = enclose "\"" "\"";
233
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   425
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   426
(*space_implode "..." (explode "hello"); gives "h...e...l...l...o"*)
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   427
fun space_implode a bs = implode (separate a bs);
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   428
255
ee132db91681 added if_none, parents, commas, gen_duplicates, duplicates, assoc2;
wenzelm
parents: 245
diff changeset
   429
val commas = space_implode ", ";
380
daca5b594fb3 added infix op also: 'a * ('a -> 'b) -> 'b;
wenzelm
parents: 265
diff changeset
   430
val commas_quote = commas o map quote;
255
ee132db91681 added if_none, parents, commas, gen_duplicates, duplicates, assoc2;
wenzelm
parents: 245
diff changeset
   431
233
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   432
(*concatenate messages, one per line, into a string*)
255
ee132db91681 added if_none, parents, commas, gen_duplicates, duplicates, assoc2;
wenzelm
parents: 245
diff changeset
   433
val cat_lines = space_implode "\n";
233
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   434
3832
17a20a2af8f5 fixed space_explode, old one retained as BAD_space_explode;
wenzelm
parents: 3762
diff changeset
   435
(*BAD_space_explode "." "h.e..l.lo"; gives ["h", "e", "l", "lo"]*)
17a20a2af8f5 fixed space_explode, old one retained as BAD_space_explode;
wenzelm
parents: 3762
diff changeset
   436
fun BAD_space_explode sep s =
1290
ee8f41456d28 added space_explode and relative_path
clasohm
parents: 955
diff changeset
   437
  let fun divide [] "" = []
ee8f41456d28 added space_explode and relative_path
clasohm
parents: 955
diff changeset
   438
        | divide [] part = [part]
ee8f41456d28 added space_explode and relative_path
clasohm
parents: 955
diff changeset
   439
        | divide (c::s) part =
ee8f41456d28 added space_explode and relative_path
clasohm
parents: 955
diff changeset
   440
            if c = sep then
ee8f41456d28 added space_explode and relative_path
clasohm
parents: 955
diff changeset
   441
              (if part = "" then divide s "" else part :: divide s "")
ee8f41456d28 added space_explode and relative_path
clasohm
parents: 955
diff changeset
   442
            else divide s (part ^ c)
ee8f41456d28 added space_explode and relative_path
clasohm
parents: 955
diff changeset
   443
  in divide (explode s) "" end;
233
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   444
3832
17a20a2af8f5 fixed space_explode, old one retained as BAD_space_explode;
wenzelm
parents: 3762
diff changeset
   445
(*space_explode "." "h.e..l.lo"; gives ["h", "e", "", "l", "lo"]*)
17a20a2af8f5 fixed space_explode, old one retained as BAD_space_explode;
wenzelm
parents: 3762
diff changeset
   446
fun space_explode _ "" = []
17a20a2af8f5 fixed space_explode, old one retained as BAD_space_explode;
wenzelm
parents: 3762
diff changeset
   447
  | space_explode sep str =
17a20a2af8f5 fixed space_explode, old one retained as BAD_space_explode;
wenzelm
parents: 3762
diff changeset
   448
      let
17a20a2af8f5 fixed space_explode, old one retained as BAD_space_explode;
wenzelm
parents: 3762
diff changeset
   449
        fun expl chs =
17a20a2af8f5 fixed space_explode, old one retained as BAD_space_explode;
wenzelm
parents: 3762
diff changeset
   450
          (case take_prefix (not_equal sep) chs of
17a20a2af8f5 fixed space_explode, old one retained as BAD_space_explode;
wenzelm
parents: 3762
diff changeset
   451
            (cs, []) => [implode cs]
17a20a2af8f5 fixed space_explode, old one retained as BAD_space_explode;
wenzelm
parents: 3762
diff changeset
   452
          | (cs, _ :: cs') => implode cs :: expl cs');
17a20a2af8f5 fixed space_explode, old one retained as BAD_space_explode;
wenzelm
parents: 3762
diff changeset
   453
      in expl (explode str) end;
17a20a2af8f5 fixed space_explode, old one retained as BAD_space_explode;
wenzelm
parents: 3762
diff changeset
   454
17a20a2af8f5 fixed space_explode, old one retained as BAD_space_explode;
wenzelm
parents: 3762
diff changeset
   455
val split_lines = space_explode "\n";
17a20a2af8f5 fixed space_explode, old one retained as BAD_space_explode;
wenzelm
parents: 3762
diff changeset
   456
17a20a2af8f5 fixed space_explode, old one retained as BAD_space_explode;
wenzelm
parents: 3762
diff changeset
   457
233
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   458
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   459
(** lists as sets **)
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   460
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   461
(*membership in a list*)
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   462
fun x mem [] = false
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   463
  | x mem (y :: ys) = x = y orelse x mem ys;
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   464
2175
21fde76bc742 Updated syntax; shortened comments; put in monomorphic versions of ins
paulson
parents: 2157
diff changeset
   465
(*membership in a list, optimized version for ints*)
1576
af8f43f742a0 Added some optimized versions of functions dealing with sets
berghofe
parents: 1460
diff changeset
   466
fun (x:int) mem_int [] = false
af8f43f742a0 Added some optimized versions of functions dealing with sets
berghofe
parents: 1460
diff changeset
   467
  | x mem_int (y :: ys) = x = y orelse x mem_int ys;
af8f43f742a0 Added some optimized versions of functions dealing with sets
berghofe
parents: 1460
diff changeset
   468
2175
21fde76bc742 Updated syntax; shortened comments; put in monomorphic versions of ins
paulson
parents: 2157
diff changeset
   469
(*membership in a list, optimized version for strings*)
1576
af8f43f742a0 Added some optimized versions of functions dealing with sets
berghofe
parents: 1460
diff changeset
   470
fun (x:string) mem_string [] = false
af8f43f742a0 Added some optimized versions of functions dealing with sets
berghofe
parents: 1460
diff changeset
   471
  | x mem_string (y :: ys) = x = y orelse x mem_string ys;
af8f43f742a0 Added some optimized versions of functions dealing with sets
berghofe
parents: 1460
diff changeset
   472
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   473
(*generalized membership test*)
233
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   474
fun gen_mem eq (x, []) = false
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   475
  | gen_mem eq (x, y :: ys) = eq (x, y) orelse gen_mem eq (x, ys);
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   476
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   477
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   478
(*insertion into list if not already there*)
2175
21fde76bc742 Updated syntax; shortened comments; put in monomorphic versions of ins
paulson
parents: 2157
diff changeset
   479
fun (x ins xs) = if x mem xs then xs else x :: xs;
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   480
2175
21fde76bc742 Updated syntax; shortened comments; put in monomorphic versions of ins
paulson
parents: 2157
diff changeset
   481
(*insertion into list, optimized version for ints*)
21fde76bc742 Updated syntax; shortened comments; put in monomorphic versions of ins
paulson
parents: 2157
diff changeset
   482
fun (x ins_int xs) = if x mem_int xs then xs else x :: xs;
1576
af8f43f742a0 Added some optimized versions of functions dealing with sets
berghofe
parents: 1460
diff changeset
   483
2175
21fde76bc742 Updated syntax; shortened comments; put in monomorphic versions of ins
paulson
parents: 2157
diff changeset
   484
(*insertion into list, optimized version for strings*)
21fde76bc742 Updated syntax; shortened comments; put in monomorphic versions of ins
paulson
parents: 2157
diff changeset
   485
fun (x ins_string xs) = if x mem_string xs then xs else x :: xs;
1576
af8f43f742a0 Added some optimized versions of functions dealing with sets
berghofe
parents: 1460
diff changeset
   486
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   487
(*generalized insertion*)
233
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   488
fun gen_ins eq (x, xs) = if gen_mem eq (x, xs) then xs else x :: xs;
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   489
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   490
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   491
(*union of sets represented as lists: no repetitions*)
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   492
fun xs union [] = xs
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   493
  | [] union ys = ys
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   494
  | (x :: xs) union ys = xs union (x ins ys);
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   495
2175
21fde76bc742 Updated syntax; shortened comments; put in monomorphic versions of ins
paulson
parents: 2157
diff changeset
   496
(*union of sets, optimized version for ints*)
1576
af8f43f742a0 Added some optimized versions of functions dealing with sets
berghofe
parents: 1460
diff changeset
   497
fun (xs:int list) union_int [] = xs
af8f43f742a0 Added some optimized versions of functions dealing with sets
berghofe
parents: 1460
diff changeset
   498
  | [] union_int ys = ys
af8f43f742a0 Added some optimized versions of functions dealing with sets
berghofe
parents: 1460
diff changeset
   499
  | (x :: xs) union_int ys = xs union_int (x ins_int ys);
af8f43f742a0 Added some optimized versions of functions dealing with sets
berghofe
parents: 1460
diff changeset
   500
2175
21fde76bc742 Updated syntax; shortened comments; put in monomorphic versions of ins
paulson
parents: 2157
diff changeset
   501
(*union of sets, optimized version for strings*)
1576
af8f43f742a0 Added some optimized versions of functions dealing with sets
berghofe
parents: 1460
diff changeset
   502
fun (xs:string list) union_string [] = xs
af8f43f742a0 Added some optimized versions of functions dealing with sets
berghofe
parents: 1460
diff changeset
   503
  | [] union_string ys = ys
af8f43f742a0 Added some optimized versions of functions dealing with sets
berghofe
parents: 1460
diff changeset
   504
  | (x :: xs) union_string ys = xs union_string (x ins_string ys);
af8f43f742a0 Added some optimized versions of functions dealing with sets
berghofe
parents: 1460
diff changeset
   505
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   506
(*generalized union*)
233
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   507
fun gen_union eq (xs, []) = xs
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   508
  | gen_union eq ([], ys) = ys
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   509
  | gen_union eq (x :: xs, ys) = gen_union eq (xs, gen_ins eq (x, ys));
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   510
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   511
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   512
(*intersection*)
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   513
fun [] inter ys = []
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   514
  | (x :: xs) inter ys =
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   515
      if x mem ys then x :: (xs inter ys) else xs inter ys;
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   516
2175
21fde76bc742 Updated syntax; shortened comments; put in monomorphic versions of ins
paulson
parents: 2157
diff changeset
   517
(*intersection, optimized version for ints*)
1576
af8f43f742a0 Added some optimized versions of functions dealing with sets
berghofe
parents: 1460
diff changeset
   518
fun ([]:int list) inter_int ys = []
af8f43f742a0 Added some optimized versions of functions dealing with sets
berghofe
parents: 1460
diff changeset
   519
  | (x :: xs) inter_int ys =
af8f43f742a0 Added some optimized versions of functions dealing with sets
berghofe
parents: 1460
diff changeset
   520
      if x mem_int ys then x :: (xs inter_int ys) else xs inter_int ys;
af8f43f742a0 Added some optimized versions of functions dealing with sets
berghofe
parents: 1460
diff changeset
   521
2175
21fde76bc742 Updated syntax; shortened comments; put in monomorphic versions of ins
paulson
parents: 2157
diff changeset
   522
(*intersection, optimized version for strings *)
1576
af8f43f742a0 Added some optimized versions of functions dealing with sets
berghofe
parents: 1460
diff changeset
   523
fun ([]:string list) inter_string ys = []
af8f43f742a0 Added some optimized versions of functions dealing with sets
berghofe
parents: 1460
diff changeset
   524
  | (x :: xs) inter_string ys =
af8f43f742a0 Added some optimized versions of functions dealing with sets
berghofe
parents: 1460
diff changeset
   525
      if x mem_string ys then x :: (xs inter_string ys) else xs inter_string ys;
af8f43f742a0 Added some optimized versions of functions dealing with sets
berghofe
parents: 1460
diff changeset
   526
233
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   527
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   528
(*subset*)
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   529
fun [] subset ys = true
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   530
  | (x :: xs) subset ys = x mem ys andalso xs subset ys;
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   531
2175
21fde76bc742 Updated syntax; shortened comments; put in monomorphic versions of ins
paulson
parents: 2157
diff changeset
   532
(*subset, optimized version for ints*)
1576
af8f43f742a0 Added some optimized versions of functions dealing with sets
berghofe
parents: 1460
diff changeset
   533
fun ([]:int list) subset_int ys = true
af8f43f742a0 Added some optimized versions of functions dealing with sets
berghofe
parents: 1460
diff changeset
   534
  | (x :: xs) subset_int ys = x mem_int ys andalso xs subset_int ys;
af8f43f742a0 Added some optimized versions of functions dealing with sets
berghofe
parents: 1460
diff changeset
   535
2175
21fde76bc742 Updated syntax; shortened comments; put in monomorphic versions of ins
paulson
parents: 2157
diff changeset
   536
(*subset, optimized version for strings*)
1576
af8f43f742a0 Added some optimized versions of functions dealing with sets
berghofe
parents: 1460
diff changeset
   537
fun ([]:string list) subset_string ys = true
af8f43f742a0 Added some optimized versions of functions dealing with sets
berghofe
parents: 1460
diff changeset
   538
  | (x :: xs) subset_string ys = x mem_string ys andalso xs subset_string ys;
af8f43f742a0 Added some optimized versions of functions dealing with sets
berghofe
parents: 1460
diff changeset
   539
2182
29e56f003599 Removal of polymorphic equality via mem, subset, eq_set, etc
paulson
parents: 2175
diff changeset
   540
(*set equality for strings*)
1576
af8f43f742a0 Added some optimized versions of functions dealing with sets
berghofe
parents: 1460
diff changeset
   541
fun eq_set_string ((xs:string list), ys) =
af8f43f742a0 Added some optimized versions of functions dealing with sets
berghofe
parents: 1460
diff changeset
   542
  xs = ys orelse (xs subset_string ys andalso ys subset_string xs);
af8f43f742a0 Added some optimized versions of functions dealing with sets
berghofe
parents: 1460
diff changeset
   543
2182
29e56f003599 Removal of polymorphic equality via mem, subset, eq_set, etc
paulson
parents: 2175
diff changeset
   544
fun gen_subset eq (xs, ys) = forall (fn x => gen_mem eq (x, ys)) xs;
29e56f003599 Removal of polymorphic equality via mem, subset, eq_set, etc
paulson
parents: 2175
diff changeset
   545
265
443dc2c37583 added eq_set;
wenzelm
parents: 255
diff changeset
   546
233
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   547
(*removing an element from a list WITHOUT duplicates*)
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   548
fun (y :: ys) \ x = if x = y then ys else y :: (ys \ x)
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   549
  | [] \ x = [];
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   550
2243
3ebeaaacfbd1 Eta-expanded some declarations that are illegal under value polymorphism
paulson
parents: 2196
diff changeset
   551
fun ys \\ xs = foldl (op \) (ys,xs);
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   552
233
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   553
(*removing an element from a list -- possibly WITH duplicates*)
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   554
fun gen_rem eq (xs, y) = filter_out (fn x => eq (x, y)) xs;
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   555
2243
3ebeaaacfbd1 Eta-expanded some declarations that are illegal under value polymorphism
paulson
parents: 2196
diff changeset
   556
fun gen_rems eq = foldl (gen_rem eq);
233
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   557
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   558
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   559
(*makes a list of the distinct members of the input; preserves order, takes
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   560
  first of equal elements*)
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   561
fun gen_distinct eq lst =
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   562
  let
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   563
    val memb = gen_mem eq;
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   564
233
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   565
    fun dist (rev_seen, []) = rev rev_seen
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   566
      | dist (rev_seen, x :: xs) =
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   567
          if memb (x, rev_seen) then dist (rev_seen, xs)
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   568
          else dist (x :: rev_seen, xs);
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   569
  in
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   570
    dist ([], lst)
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   571
  end;
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   572
2243
3ebeaaacfbd1 Eta-expanded some declarations that are illegal under value polymorphism
paulson
parents: 2196
diff changeset
   573
fun distinct l = gen_distinct (op =) l;
233
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   574
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   575
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   576
(*returns the tail beginning with the first repeated element, or []*)
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   577
fun findrep [] = []
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   578
  | findrep (x :: xs) = if x mem xs then x :: xs else findrep xs;
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   579
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   580
255
ee132db91681 added if_none, parents, commas, gen_duplicates, duplicates, assoc2;
wenzelm
parents: 245
diff changeset
   581
(*returns a list containing all repeated elements exactly once; preserves
ee132db91681 added if_none, parents, commas, gen_duplicates, duplicates, assoc2;
wenzelm
parents: 245
diff changeset
   582
  order, takes first of equal elements*)
ee132db91681 added if_none, parents, commas, gen_duplicates, duplicates, assoc2;
wenzelm
parents: 245
diff changeset
   583
fun gen_duplicates eq lst =
ee132db91681 added if_none, parents, commas, gen_duplicates, duplicates, assoc2;
wenzelm
parents: 245
diff changeset
   584
  let
ee132db91681 added if_none, parents, commas, gen_duplicates, duplicates, assoc2;
wenzelm
parents: 245
diff changeset
   585
    val memb = gen_mem eq;
ee132db91681 added if_none, parents, commas, gen_duplicates, duplicates, assoc2;
wenzelm
parents: 245
diff changeset
   586
ee132db91681 added if_none, parents, commas, gen_duplicates, duplicates, assoc2;
wenzelm
parents: 245
diff changeset
   587
    fun dups (rev_dups, []) = rev rev_dups
ee132db91681 added if_none, parents, commas, gen_duplicates, duplicates, assoc2;
wenzelm
parents: 245
diff changeset
   588
      | dups (rev_dups, x :: xs) =
ee132db91681 added if_none, parents, commas, gen_duplicates, duplicates, assoc2;
wenzelm
parents: 245
diff changeset
   589
          if memb (x, rev_dups) orelse not (memb (x, xs)) then
ee132db91681 added if_none, parents, commas, gen_duplicates, duplicates, assoc2;
wenzelm
parents: 245
diff changeset
   590
            dups (rev_dups, xs)
ee132db91681 added if_none, parents, commas, gen_duplicates, duplicates, assoc2;
wenzelm
parents: 245
diff changeset
   591
          else dups (x :: rev_dups, xs);
ee132db91681 added if_none, parents, commas, gen_duplicates, duplicates, assoc2;
wenzelm
parents: 245
diff changeset
   592
  in
ee132db91681 added if_none, parents, commas, gen_duplicates, duplicates, assoc2;
wenzelm
parents: 245
diff changeset
   593
    dups ([], lst)
ee132db91681 added if_none, parents, commas, gen_duplicates, duplicates, assoc2;
wenzelm
parents: 245
diff changeset
   594
  end;
ee132db91681 added if_none, parents, commas, gen_duplicates, duplicates, assoc2;
wenzelm
parents: 245
diff changeset
   595
2243
3ebeaaacfbd1 Eta-expanded some declarations that are illegal under value polymorphism
paulson
parents: 2196
diff changeset
   596
fun duplicates l = gen_duplicates (op =) l;
255
ee132db91681 added if_none, parents, commas, gen_duplicates, duplicates, assoc2;
wenzelm
parents: 245
diff changeset
   597
ee132db91681 added if_none, parents, commas, gen_duplicates, duplicates, assoc2;
wenzelm
parents: 245
diff changeset
   598
233
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   599
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   600
(** association lists **)
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   601
233
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   602
(*association list lookup*)
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   603
fun assoc ([], key) = None
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   604
  | assoc ((keyi, xi) :: pairs, key) =
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   605
      if key = keyi then Some xi else assoc (pairs, key);
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   606
2175
21fde76bc742 Updated syntax; shortened comments; put in monomorphic versions of ins
paulson
parents: 2157
diff changeset
   607
(*association list lookup, optimized version for ints*)
1576
af8f43f742a0 Added some optimized versions of functions dealing with sets
berghofe
parents: 1460
diff changeset
   608
fun assoc_int ([], (key:int)) = None
af8f43f742a0 Added some optimized versions of functions dealing with sets
berghofe
parents: 1460
diff changeset
   609
  | assoc_int ((keyi, xi) :: pairs, key) =
af8f43f742a0 Added some optimized versions of functions dealing with sets
berghofe
parents: 1460
diff changeset
   610
      if key = keyi then Some xi else assoc_int (pairs, key);
af8f43f742a0 Added some optimized versions of functions dealing with sets
berghofe
parents: 1460
diff changeset
   611
2175
21fde76bc742 Updated syntax; shortened comments; put in monomorphic versions of ins
paulson
parents: 2157
diff changeset
   612
(*association list lookup, optimized version for strings*)
1576
af8f43f742a0 Added some optimized versions of functions dealing with sets
berghofe
parents: 1460
diff changeset
   613
fun assoc_string ([], (key:string)) = None
af8f43f742a0 Added some optimized versions of functions dealing with sets
berghofe
parents: 1460
diff changeset
   614
  | assoc_string ((keyi, xi) :: pairs, key) =
af8f43f742a0 Added some optimized versions of functions dealing with sets
berghofe
parents: 1460
diff changeset
   615
      if key = keyi then Some xi else assoc_string (pairs, key);
af8f43f742a0 Added some optimized versions of functions dealing with sets
berghofe
parents: 1460
diff changeset
   616
2175
21fde76bc742 Updated syntax; shortened comments; put in monomorphic versions of ins
paulson
parents: 2157
diff changeset
   617
(*association list lookup, optimized version for string*ints*)
1576
af8f43f742a0 Added some optimized versions of functions dealing with sets
berghofe
parents: 1460
diff changeset
   618
fun assoc_string_int ([], (key:string*int)) = None
af8f43f742a0 Added some optimized versions of functions dealing with sets
berghofe
parents: 1460
diff changeset
   619
  | assoc_string_int ((keyi, xi) :: pairs, key) =
af8f43f742a0 Added some optimized versions of functions dealing with sets
berghofe
parents: 1460
diff changeset
   620
      if key = keyi then Some xi else assoc_string_int (pairs, key);
af8f43f742a0 Added some optimized versions of functions dealing with sets
berghofe
parents: 1460
diff changeset
   621
233
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   622
fun assocs ps x =
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   623
  (case assoc (ps, x) of
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   624
    None => []
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   625
  | Some ys => ys);
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   626
255
ee132db91681 added if_none, parents, commas, gen_duplicates, duplicates, assoc2;
wenzelm
parents: 245
diff changeset
   627
(*two-fold association list lookup*)
ee132db91681 added if_none, parents, commas, gen_duplicates, duplicates, assoc2;
wenzelm
parents: 245
diff changeset
   628
fun assoc2 (aal, (key1, key2)) =
ee132db91681 added if_none, parents, commas, gen_duplicates, duplicates, assoc2;
wenzelm
parents: 245
diff changeset
   629
  (case assoc (aal, key1) of
ee132db91681 added if_none, parents, commas, gen_duplicates, duplicates, assoc2;
wenzelm
parents: 245
diff changeset
   630
    Some al => assoc (al, key2)
ee132db91681 added if_none, parents, commas, gen_duplicates, duplicates, assoc2;
wenzelm
parents: 245
diff changeset
   631
  | None => None);
ee132db91681 added if_none, parents, commas, gen_duplicates, duplicates, assoc2;
wenzelm
parents: 245
diff changeset
   632
233
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   633
(*generalized association list lookup*)
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   634
fun gen_assoc eq ([], key) = None
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   635
  | gen_assoc eq ((keyi, xi) :: pairs, key) =
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   636
      if eq (key, keyi) then Some xi else gen_assoc eq (pairs, key);
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   637
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   638
(*association list update*)
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   639
fun overwrite (al, p as (key, _)) =
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   640
  let fun over ((q as (keyi, _)) :: pairs) =
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   641
            if keyi = key then p :: pairs else q :: (over pairs)
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   642
        | over [] = [p]
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   643
  in over al end;
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   644
2522
a1a18530c4ac added gen_overwrite;
wenzelm
parents: 2506
diff changeset
   645
fun gen_overwrite eq (al, p as (key, _)) =
a1a18530c4ac added gen_overwrite;
wenzelm
parents: 2506
diff changeset
   646
  let fun over ((q as (keyi, _)) :: pairs) =
a1a18530c4ac added gen_overwrite;
wenzelm
parents: 2506
diff changeset
   647
            if eq (keyi, key) then p :: pairs else q :: (over pairs)
a1a18530c4ac added gen_overwrite;
wenzelm
parents: 2506
diff changeset
   648
        | over [] = [p]
a1a18530c4ac added gen_overwrite;
wenzelm
parents: 2506
diff changeset
   649
  in over al end;
a1a18530c4ac added gen_overwrite;
wenzelm
parents: 2506
diff changeset
   650
233
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   651
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   652
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   653
(** generic tables **)
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   654
233
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   655
(*Tables are supposed to be 'efficient' encodings of lists of elements distinct
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   656
  wrt. an equality "eq". The extend and merge operations below are optimized
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   657
  for long-term space efficiency.*)
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   658
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   659
(*append (new) elements to a table*)
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   660
fun generic_extend _ _ _ tab [] = tab
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   661
  | generic_extend eq dest_tab mk_tab tab1 lst2 =
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   662
      let
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   663
        val lst1 = dest_tab tab1;
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   664
        val new_lst2 = gen_rems eq (lst2, lst1);
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   665
      in
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   666
        if null new_lst2 then tab1
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   667
        else mk_tab (lst1 @ new_lst2)
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   668
      end;
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   669
233
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   670
(*append (new) elements of 2nd table to 1st table*)
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   671
fun generic_merge eq dest_tab mk_tab tab1 tab2 =
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   672
  let
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   673
    val lst1 = dest_tab tab1;
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   674
    val lst2 = dest_tab tab2;
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   675
    val new_lst2 = gen_rems eq (lst2, lst1);
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   676
  in
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   677
    if null new_lst2 then tab1
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   678
    else if gen_subset eq (lst1, lst2) then tab2
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   679
    else mk_tab (lst1 @ new_lst2)
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   680
  end;
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   681
233
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   682
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   683
(*lists as tables*)
2243
3ebeaaacfbd1 Eta-expanded some declarations that are illegal under value polymorphism
paulson
parents: 2196
diff changeset
   684
fun extend_list tab = generic_extend (op =) I I tab;
3ebeaaacfbd1 Eta-expanded some declarations that are illegal under value polymorphism
paulson
parents: 2196
diff changeset
   685
fun merge_lists tab = generic_merge (op =) I I tab;
233
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   686
380
daca5b594fb3 added infix op also: 'a * ('a -> 'b) -> 'b;
wenzelm
parents: 265
diff changeset
   687
fun merge_rev_lists xs [] = xs
daca5b594fb3 added infix op also: 'a * ('a -> 'b) -> 'b;
wenzelm
parents: 265
diff changeset
   688
  | merge_rev_lists [] ys = ys
daca5b594fb3 added infix op also: 'a * ('a -> 'b) -> 'b;
wenzelm
parents: 265
diff changeset
   689
  | merge_rev_lists xs (y :: ys) =
daca5b594fb3 added infix op also: 'a * ('a -> 'b) -> 'b;
wenzelm
parents: 265
diff changeset
   690
      (if y mem xs then I else cons y) (merge_rev_lists xs ys);
daca5b594fb3 added infix op also: 'a * ('a -> 'b) -> 'b;
wenzelm
parents: 265
diff changeset
   691
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   692
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   693
233
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   694
(** balanced trees **)
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   695
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   696
exception Balance;      (*indicates non-positive argument to balancing fun*)
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   697
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   698
(*balanced folding; avoids deep nesting*)
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   699
fun fold_bal f [x] = x
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   700
  | fold_bal f [] = raise Balance
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   701
  | fold_bal f xs =
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   702
      let val k = length xs div 2
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   703
      in  f (fold_bal f (take(k, xs)),
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   704
             fold_bal f (drop(k, xs)))
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   705
      end;
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   706
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   707
(*construct something of the form f(...g(...(x)...)) for balanced access*)
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   708
fun access_bal (f, g, x) n i =
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   709
  let fun acc n i =     (*1<=i<=n*)
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   710
          if n=1 then x else
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   711
          let val n2 = n div 2
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   712
          in  if i<=n2 then f (acc n2 i)
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   713
                       else g (acc (n-n2) (i-n2))
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   714
          end
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   715
  in  if 1<=i andalso i<=n then acc n i else raise Balance  end;
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   716
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   717
(*construct ALL such accesses; could try harder to share recursive calls!*)
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   718
fun accesses_bal (f, g, x) n =
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   719
  let fun acc n =
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   720
          if n=1 then [x] else
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   721
          let val n2 = n div 2
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   722
              val acc2 = acc n2
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   723
          in  if n-n2=n2 then map f acc2 @ map g acc2
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   724
                         else map f acc2 @ map g (acc (n-n2)) end
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   725
  in  if 1<=n then acc n else raise Balance  end;
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   726
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   727
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   728
2506
965127966331 added datatype order;
wenzelm
parents: 2471
diff changeset
   729
(** orders **)
965127966331 added datatype order;
wenzelm
parents: 2471
diff changeset
   730
965127966331 added datatype order;
wenzelm
parents: 2471
diff changeset
   731
datatype order = LESS | EQUAL | GREATER;
965127966331 added datatype order;
wenzelm
parents: 2471
diff changeset
   732
965127966331 added datatype order;
wenzelm
parents: 2471
diff changeset
   733
fun intord (i, j: int) =
965127966331 added datatype order;
wenzelm
parents: 2471
diff changeset
   734
  if i < j then LESS
965127966331 added datatype order;
wenzelm
parents: 2471
diff changeset
   735
  else if i = j then EQUAL
965127966331 added datatype order;
wenzelm
parents: 2471
diff changeset
   736
  else GREATER;
965127966331 added datatype order;
wenzelm
parents: 2471
diff changeset
   737
965127966331 added datatype order;
wenzelm
parents: 2471
diff changeset
   738
fun stringord (a, b: string) =
965127966331 added datatype order;
wenzelm
parents: 2471
diff changeset
   739
  if a < b then LESS
965127966331 added datatype order;
wenzelm
parents: 2471
diff changeset
   740
  else if a = b then EQUAL
965127966331 added datatype order;
wenzelm
parents: 2471
diff changeset
   741
  else GREATER;
965127966331 added datatype order;
wenzelm
parents: 2471
diff changeset
   742
965127966331 added datatype order;
wenzelm
parents: 2471
diff changeset
   743
965127966331 added datatype order;
wenzelm
parents: 2471
diff changeset
   744
3525
88edd3450460 improved output channels: normal, warning, error;
wenzelm
parents: 3407
diff changeset
   745
(** input / output and diagnostics **)
233
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   746
2243
3ebeaaacfbd1 Eta-expanded some declarations that are illegal under value polymorphism
paulson
parents: 2196
diff changeset
   747
val cd = OS.FileSys.chDir;
2317
672015b535d7 added pwd;
wenzelm
parents: 2303
diff changeset
   748
val pwd = OS.FileSys.getDir;
2243
3ebeaaacfbd1 Eta-expanded some declarations that are illegal under value polymorphism
paulson
parents: 2196
diff changeset
   749
3525
88edd3450460 improved output channels: normal, warning, error;
wenzelm
parents: 3407
diff changeset
   750
88edd3450460 improved output channels: normal, warning, error;
wenzelm
parents: 3407
diff changeset
   751
local
88edd3450460 improved output channels: normal, warning, error;
wenzelm
parents: 3407
diff changeset
   752
  fun out s =
88edd3450460 improved output channels: normal, warning, error;
wenzelm
parents: 3407
diff changeset
   753
    (TextIO.output (TextIO.stdOut, s); TextIO.flushOut TextIO.stdOut);
88edd3450460 improved output channels: normal, warning, error;
wenzelm
parents: 3407
diff changeset
   754
88edd3450460 improved output channels: normal, warning, error;
wenzelm
parents: 3407
diff changeset
   755
  fun prefix_lines prfx txt =
3832
17a20a2af8f5 fixed space_explode, old one retained as BAD_space_explode;
wenzelm
parents: 3762
diff changeset
   756
    txt |> split_lines |> map (fn s => prfx ^ s ^ "\n") |> implode;
3525
88edd3450460 improved output channels: normal, warning, error;
wenzelm
parents: 3407
diff changeset
   757
in
88edd3450460 improved output channels: normal, warning, error;
wenzelm
parents: 3407
diff changeset
   758
88edd3450460 improved output channels: normal, warning, error;
wenzelm
parents: 3407
diff changeset
   759
(*hooks for output channels: normal, warning, error*)
88edd3450460 improved output channels: normal, warning, error;
wenzelm
parents: 3407
diff changeset
   760
val prs_fn = ref (fn s => out s);
88edd3450460 improved output channels: normal, warning, error;
wenzelm
parents: 3407
diff changeset
   761
val warning_fn = ref (fn s => out (prefix_lines "### " s));
88edd3450460 improved output channels: normal, warning, error;
wenzelm
parents: 3407
diff changeset
   762
val error_fn = ref (fn s => out (prefix_lines "*** " s));
88edd3450460 improved output channels: normal, warning, error;
wenzelm
parents: 3407
diff changeset
   763
88edd3450460 improved output channels: normal, warning, error;
wenzelm
parents: 3407
diff changeset
   764
end;
1580
e3fd931e6095 Added some functions which allow redirection of Isabelle's output
berghofe
parents: 1576
diff changeset
   765
e3fd931e6095 Added some functions which allow redirection of Isabelle's output
berghofe
parents: 1576
diff changeset
   766
fun prs s = !prs_fn s;
233
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   767
fun writeln s = prs (s ^ "\n");
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   768
3525
88edd3450460 improved output channels: normal, warning, error;
wenzelm
parents: 3407
diff changeset
   769
fun warning s = !warning_fn s;
233
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   770
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   771
(*print error message and abort to top level*)
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   772
exception ERROR;
3874
552ce5ad6a2e tuned comment;
wenzelm
parents: 3832
diff changeset
   773
fun error_msg s = !error_fn s;			(*promise to raise ERROR later!*)
3553
a148c7e7152e added error_msg;
wenzelm
parents: 3525
diff changeset
   774
fun error s = (error_msg s; raise ERROR);
a148c7e7152e added error_msg;
wenzelm
parents: 3525
diff changeset
   775
fun sys_error msg = (error_msg " !! SYSTEM ERROR !!\n"; error msg);
233
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   776
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   777
fun assert p msg = if p then () else error msg;
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   778
fun deny p msg = if p then error msg else ();
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   779
544
c53386a5bcf1 Pure/library/assert_all: new, moved from ZF/ind_syntax.ML
lcp
parents: 512
diff changeset
   780
(*Assert pred for every member of l, generating a message if pred fails*)
c53386a5bcf1 Pure/library/assert_all: new, moved from ZF/ind_syntax.ML
lcp
parents: 512
diff changeset
   781
fun assert_all pred l msg_fn = 
c53386a5bcf1 Pure/library/assert_all: new, moved from ZF/ind_syntax.ML
lcp
parents: 512
diff changeset
   782
  let fun asl [] = ()
2243
3ebeaaacfbd1 Eta-expanded some declarations that are illegal under value polymorphism
paulson
parents: 2196
diff changeset
   783
        | asl (x::xs) = if pred x then asl xs
3ebeaaacfbd1 Eta-expanded some declarations that are illegal under value polymorphism
paulson
parents: 2196
diff changeset
   784
                        else error (msg_fn x)
544
c53386a5bcf1 Pure/library/assert_all: new, moved from ZF/ind_syntax.ML
lcp
parents: 512
diff changeset
   785
  in  asl l  end;
233
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   786
3624
36e19fce289e added read_file, write_file;
wenzelm
parents: 3606
diff changeset
   787
3699
7c30ab9e25d1 added handle_error: ('a -> 'b) -> 'a -> 'b error;
wenzelm
parents: 3645
diff changeset
   788
(* handle errors (capturing messages) *)
7c30ab9e25d1 added handle_error: ('a -> 'b) -> 'a -> 'b error;
wenzelm
parents: 3645
diff changeset
   789
7c30ab9e25d1 added handle_error: ('a -> 'b) -> 'a -> 'b error;
wenzelm
parents: 3645
diff changeset
   790
datatype 'a error =
7c30ab9e25d1 added handle_error: ('a -> 'b) -> 'a -> 'b error;
wenzelm
parents: 3645
diff changeset
   791
  Error of string |
7c30ab9e25d1 added handle_error: ('a -> 'b) -> 'a -> 'b error;
wenzelm
parents: 3645
diff changeset
   792
  OK of 'a;
7c30ab9e25d1 added handle_error: ('a -> 'b) -> 'a -> 'b error;
wenzelm
parents: 3645
diff changeset
   793
7c30ab9e25d1 added handle_error: ('a -> 'b) -> 'a -> 'b error;
wenzelm
parents: 3645
diff changeset
   794
fun handle_error f x =
7c30ab9e25d1 added handle_error: ('a -> 'b) -> 'a -> 'b error;
wenzelm
parents: 3645
diff changeset
   795
  let
7c30ab9e25d1 added handle_error: ('a -> 'b) -> 'a -> 'b error;
wenzelm
parents: 3645
diff changeset
   796
    val buffer = ref "";
7c30ab9e25d1 added handle_error: ('a -> 'b) -> 'a -> 'b error;
wenzelm
parents: 3645
diff changeset
   797
    fun capture s = buffer := ! buffer ^ s ^ "\n";
7c30ab9e25d1 added handle_error: ('a -> 'b) -> 'a -> 'b error;
wenzelm
parents: 3645
diff changeset
   798
    val result = Some (setmp error_fn capture f x) handle ERROR => None;
7c30ab9e25d1 added handle_error: ('a -> 'b) -> 'a -> 'b error;
wenzelm
parents: 3645
diff changeset
   799
  in
7c30ab9e25d1 added handle_error: ('a -> 'b) -> 'a -> 'b error;
wenzelm
parents: 3645
diff changeset
   800
    case result of
7c30ab9e25d1 added handle_error: ('a -> 'b) -> 'a -> 'b error;
wenzelm
parents: 3645
diff changeset
   801
      None => Error (! buffer)
7c30ab9e25d1 added handle_error: ('a -> 'b) -> 'a -> 'b error;
wenzelm
parents: 3645
diff changeset
   802
    | Some y => OK y
7c30ab9e25d1 added handle_error: ('a -> 'b) -> 'a -> 'b error;
wenzelm
parents: 3645
diff changeset
   803
  end;
7c30ab9e25d1 added handle_error: ('a -> 'b) -> 'a -> 'b error;
wenzelm
parents: 3645
diff changeset
   804
7c30ab9e25d1 added handle_error: ('a -> 'b) -> 'a -> 'b error;
wenzelm
parents: 3645
diff changeset
   805
3624
36e19fce289e added read_file, write_file;
wenzelm
parents: 3606
diff changeset
   806
(* read / write files *)
36e19fce289e added read_file, write_file;
wenzelm
parents: 3606
diff changeset
   807
36e19fce289e added read_file, write_file;
wenzelm
parents: 3606
diff changeset
   808
fun read_file name =
36e19fce289e added read_file, write_file;
wenzelm
parents: 3606
diff changeset
   809
  let
36e19fce289e added read_file, write_file;
wenzelm
parents: 3606
diff changeset
   810
    val instream  = TextIO.openIn name;
36e19fce289e added read_file, write_file;
wenzelm
parents: 3606
diff changeset
   811
    val intext = TextIO.inputAll instream;
36e19fce289e added read_file, write_file;
wenzelm
parents: 3606
diff changeset
   812
  in
36e19fce289e added read_file, write_file;
wenzelm
parents: 3606
diff changeset
   813
    TextIO.closeIn instream;
36e19fce289e added read_file, write_file;
wenzelm
parents: 3606
diff changeset
   814
    intext
36e19fce289e added read_file, write_file;
wenzelm
parents: 3606
diff changeset
   815
  end;
36e19fce289e added read_file, write_file;
wenzelm
parents: 3606
diff changeset
   816
36e19fce289e added read_file, write_file;
wenzelm
parents: 3606
diff changeset
   817
fun write_file name txt =
3645
cfbd814a11f2 added append_file;
wenzelm
parents: 3624
diff changeset
   818
  let val outstream = TextIO.openOut name in
cfbd814a11f2 added append_file;
wenzelm
parents: 3624
diff changeset
   819
    TextIO.output (outstream, txt);
cfbd814a11f2 added append_file;
wenzelm
parents: 3624
diff changeset
   820
    TextIO.closeOut outstream
cfbd814a11f2 added append_file;
wenzelm
parents: 3624
diff changeset
   821
  end;
cfbd814a11f2 added append_file;
wenzelm
parents: 3624
diff changeset
   822
cfbd814a11f2 added append_file;
wenzelm
parents: 3624
diff changeset
   823
fun append_file name txt =
cfbd814a11f2 added append_file;
wenzelm
parents: 3624
diff changeset
   824
  let val outstream = TextIO.openAppend name in
3624
36e19fce289e added read_file, write_file;
wenzelm
parents: 3606
diff changeset
   825
    TextIO.output (outstream, txt);
36e19fce289e added read_file, write_file;
wenzelm
parents: 3606
diff changeset
   826
    TextIO.closeOut outstream
36e19fce289e added read_file, write_file;
wenzelm
parents: 3606
diff changeset
   827
  end;
36e19fce289e added read_file, write_file;
wenzelm
parents: 3606
diff changeset
   828
36e19fce289e added read_file, write_file;
wenzelm
parents: 3606
diff changeset
   829
36e19fce289e added read_file, write_file;
wenzelm
parents: 3606
diff changeset
   830
(*for the "test" target in IsaMakefiles -- signifies successful termination*)
233
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   831
fun maketest msg =
3624
36e19fce289e added read_file, write_file;
wenzelm
parents: 3606
diff changeset
   832
  (writeln msg; write_file "test" "Test examples ran successfully\n");
233
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   833
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   834
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   835
(*print a list surrounded by the brackets lpar and rpar, with comma separator
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   836
  print nothing for empty list*)
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   837
fun print_list (lpar, rpar, pre: 'a -> unit) (l : 'a list) =
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   838
  let fun prec x = (prs ","; pre x)
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   839
  in
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   840
    (case l of
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   841
      [] => ()
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   842
    | x::l => (prs lpar; pre x; seq prec l; prs rpar))
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   843
  end;
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   844
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   845
(*print a list of items separated by newlines*)
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   846
fun print_list_ln (pre: 'a -> unit) : 'a list -> unit =
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   847
  seq (fn x => (pre x; writeln ""));
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   848
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   849
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   850
val print_int = prs o string_of_int;
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   851
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   852
3525
88edd3450460 improved output channels: normal, warning, error;
wenzelm
parents: 3407
diff changeset
   853
(* output to LaTeX / xdvi *)
88edd3450460 improved output channels: normal, warning, error;
wenzelm
parents: 3407
diff changeset
   854
fun latex s =
88edd3450460 improved output channels: normal, warning, error;
wenzelm
parents: 3407
diff changeset
   855
  execute ("( cd /tmp ; echo \"" ^ s ^
88edd3450460 improved output channels: normal, warning, error;
wenzelm
parents: 3407
diff changeset
   856
    "\" | isa2latex -s > $$.tex ; latex $$.tex ; xdvi $$.dvi ; rm $$.* ) > /dev/null &");
88edd3450460 improved output channels: normal, warning, error;
wenzelm
parents: 3407
diff changeset
   857
233
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   858
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   859
(** timing **)
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   860
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   861
(*unconditional timing function*)
2243
3ebeaaacfbd1 Eta-expanded some declarations that are illegal under value polymorphism
paulson
parents: 2196
diff changeset
   862
fun timeit x = cond_timeit true x;
233
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   863
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   864
(*timed application function*)
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   865
fun timeap f x = timeit (fn () => f x);
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   866
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   867
(*timed "use" function, printing filenames*)
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   868
fun time_use fname = timeit (fn () =>
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   869
  (writeln ("\n**** Starting " ^ fname ^ " ****"); use fname;
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   870
   writeln ("\n**** Finished " ^ fname ^ " ****")));
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   871
3624
36e19fce289e added read_file, write_file;
wenzelm
parents: 3606
diff changeset
   872
(*use the file, but exit with error code if errors found.*)
955
aa0c5f9daf5b Declares the function exit_use to behave like use but fail if
lcp
parents: 544
diff changeset
   873
fun exit_use fname = use fname handle _ => exit 1;
233
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   874
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   875
1407
c22cc592785f added subdir_of
clasohm
parents: 1364
diff changeset
   876
(** filenames and paths **)
233
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   877
1290
ee8f41456d28 added space_explode and relative_path
clasohm
parents: 955
diff changeset
   878
(*Convert UNIX filename of the form "path/file" to "path/" and "file";
233
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   879
  if filename contains no slash, then it returns "" and "file"*)
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   880
val split_filename =
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   881
  (pairself implode) o take_suffix (not_equal "/") o explode;
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   882
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   883
val base_name = #2 o split_filename;
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   884
1290
ee8f41456d28 added space_explode and relative_path
clasohm
parents: 955
diff changeset
   885
(*Merge splitted filename (path and file);
233
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   886
  if path does not end with one a slash is appended*)
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   887
fun tack_on "" name = name
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   888
  | tack_on path name =
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   889
      if last_elem (explode path) = "/" then path ^ name
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   890
      else path ^ "/" ^ name;
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   891
1290
ee8f41456d28 added space_explode and relative_path
clasohm
parents: 955
diff changeset
   892
(*Remove the extension of a filename, i.e. the part after the last '.'*)
233
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   893
val remove_ext = implode o #1 o take_suffix (not_equal ".") o explode;
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   894
1290
ee8f41456d28 added space_explode and relative_path
clasohm
parents: 955
diff changeset
   895
(*Make relative path to reach an absolute location from a different one*)
ee8f41456d28 added space_explode and relative_path
clasohm
parents: 955
diff changeset
   896
fun relative_path cur_path dest_path =
ee8f41456d28 added space_explode and relative_path
clasohm
parents: 955
diff changeset
   897
  let (*Remove common beginning of both paths and make relative path*)
ee8f41456d28 added space_explode and relative_path
clasohm
parents: 955
diff changeset
   898
      fun mk_relative [] [] = []
ee8f41456d28 added space_explode and relative_path
clasohm
parents: 955
diff changeset
   899
        | mk_relative [] ds = ds
ee8f41456d28 added space_explode and relative_path
clasohm
parents: 955
diff changeset
   900
        | mk_relative cs [] = map (fn _ => "..") cs
ee8f41456d28 added space_explode and relative_path
clasohm
parents: 955
diff changeset
   901
        | mk_relative (c::cs) (d::ds) =
ee8f41456d28 added space_explode and relative_path
clasohm
parents: 955
diff changeset
   902
            if c = d then mk_relative cs ds
ee8f41456d28 added space_explode and relative_path
clasohm
parents: 955
diff changeset
   903
            else ".." :: map (fn _ => "..") cs @ (d::ds);
ee8f41456d28 added space_explode and relative_path
clasohm
parents: 955
diff changeset
   904
  in if cur_path = "" orelse hd (explode cur_path) <> "/" orelse
ee8f41456d28 added space_explode and relative_path
clasohm
parents: 955
diff changeset
   905
        dest_path = "" orelse hd (explode dest_path) <> "/" then
ee8f41456d28 added space_explode and relative_path
clasohm
parents: 955
diff changeset
   906
       error "Relative or empty path passed to relative_path"
ee8f41456d28 added space_explode and relative_path
clasohm
parents: 955
diff changeset
   907
     else ();
3832
17a20a2af8f5 fixed space_explode, old one retained as BAD_space_explode;
wenzelm
parents: 3762
diff changeset
   908
     space_implode "/" (mk_relative (BAD_space_explode "/" cur_path)
17a20a2af8f5 fixed space_explode, old one retained as BAD_space_explode;
wenzelm
parents: 3762
diff changeset
   909
                                    (BAD_space_explode "/" dest_path))
1290
ee8f41456d28 added space_explode and relative_path
clasohm
parents: 955
diff changeset
   910
  end;
233
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   911
1407
c22cc592785f added subdir_of
clasohm
parents: 1364
diff changeset
   912
(*Determine if absolute path1 is a subdirectory of absolute path2*)
c22cc592785f added subdir_of
clasohm
parents: 1364
diff changeset
   913
fun path1 subdir_of path2 =
c22cc592785f added subdir_of
clasohm
parents: 1364
diff changeset
   914
  if hd (explode path1) <> "/" orelse hd (explode path2) <> "/" then
c22cc592785f added subdir_of
clasohm
parents: 1364
diff changeset
   915
    error "Relative or empty path passed to subdir_of"
3832
17a20a2af8f5 fixed space_explode, old one retained as BAD_space_explode;
wenzelm
parents: 3762
diff changeset
   916
  else (BAD_space_explode "/" path2) prefix (BAD_space_explode "/" path1);
1407
c22cc592785f added subdir_of
clasohm
parents: 1364
diff changeset
   917
1456
2e07cd051ff9 added absolute_path
clasohm
parents: 1407
diff changeset
   918
fun absolute_path cwd file =
2e07cd051ff9 added absolute_path
clasohm
parents: 1407
diff changeset
   919
  let fun rm_points [] result = rev result
2e07cd051ff9 added absolute_path
clasohm
parents: 1407
diff changeset
   920
        | rm_points (".."::ds) result = rm_points ds (tl result)
2e07cd051ff9 added absolute_path
clasohm
parents: 1407
diff changeset
   921
        | rm_points ("."::ds) result = rm_points ds result
2e07cd051ff9 added absolute_path
clasohm
parents: 1407
diff changeset
   922
        | rm_points (d::ds) result = rm_points ds (d::result);
2e07cd051ff9 added absolute_path
clasohm
parents: 1407
diff changeset
   923
  in if file = "" then ""
2e07cd051ff9 added absolute_path
clasohm
parents: 1407
diff changeset
   924
     else if hd (explode file) = "/" then file
2e07cd051ff9 added absolute_path
clasohm
parents: 1407
diff changeset
   925
     else "/" ^ space_implode "/"
3832
17a20a2af8f5 fixed space_explode, old one retained as BAD_space_explode;
wenzelm
parents: 3762
diff changeset
   926
                  (rm_points (BAD_space_explode "/" (tack_on cwd file)) [])
1456
2e07cd051ff9 added absolute_path
clasohm
parents: 1407
diff changeset
   927
  end;
2e07cd051ff9 added absolute_path
clasohm
parents: 1407
diff changeset
   928
3606
5d7073700fbc Added function "file_exists".
berghofe
parents: 3553
diff changeset
   929
fun file_exists file = (file_info file <> "");
5d7073700fbc Added function "file_exists".
berghofe
parents: 3553
diff changeset
   930
233
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   931
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   932
(** misc functions **)
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   933
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   934
(*use the keyfun to make a list of (x, key) pairs*)
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   935
fun make_keylist (keyfun: 'a->'b) : 'a list -> ('a * 'b) list =
233
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   936
  let fun keypair x = (x, keyfun x)
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   937
  in map keypair end;
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   938
233
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   939
(*given a list of (x, key) pairs and a searchkey
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   940
  return the list of xs from each pair whose key equals searchkey*)
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   941
fun keyfilter [] searchkey = []
233
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   942
  | keyfilter ((x, key) :: pairs) searchkey =
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   943
      if key = searchkey then x :: keyfilter pairs searchkey
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   944
      else keyfilter pairs searchkey;
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   945
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   946
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   947
(*Partition list into elements that satisfy predicate and those that don't.
233
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   948
  Preserves order of elements in both lists.*)
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   949
fun partition (pred: 'a->bool) (ys: 'a list) : ('a list * 'a list) =
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   950
    let fun part ([], answer) = answer
233
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   951
          | part (x::xs, (ys, ns)) = if pred(x)
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   952
            then  part (xs, (x::ys, ns))
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   953
            else  part (xs, (ys, x::ns))
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   954
    in  part (rev ys, ([], []))  end;
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   955
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   956
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   957
fun partition_eq (eq:'a * 'a -> bool) =
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   958
    let fun part [] = []
233
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   959
          | part (x::ys) = let val (xs, xs') = partition (apl(x, eq)) ys
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   960
                           in (x::xs)::(part xs') end
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   961
    in part end;
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   962
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   963
233
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   964
(*Partition a list into buckets  [ bi, b(i+1), ..., bj ]
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   965
   putting x in bk if p(k)(x) holds.  Preserve order of elements if possible.*)
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   966
fun partition_list p i j =
233
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   967
  let fun part k xs =
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   968
            if k>j then
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   969
              (case xs of [] => []
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   970
                         | _ => raise LIST "partition_list")
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   971
            else
233
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   972
            let val (ns, rest) = partition (p k) xs;
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   973
            in  ns :: part(k+1)rest  end
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   974
  in  part i end;
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   975
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   976
233
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   977
(* sorting *)
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   978
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   979
(*insertion sort; stable (does not reorder equal elements)
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   980
  'less' is less-than test on type 'a*)
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   981
fun sort (less: 'a*'a -> bool) =
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   982
  let fun insert (x, []) = [x]
233
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   983
        | insert (x, y::ys) =
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   984
              if less(y, x) then y :: insert (x, ys) else x::y::ys;
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   985
      fun sort1 [] = []
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   986
        | sort1 (x::xs) = insert (x, sort1 xs)
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   987
  in  sort1  end;
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   988
41
97aae241094b added cons, rcons, last_elem, sort_strings, take_suffix;
wenzelm
parents: 24
diff changeset
   989
(*sort strings*)
3973
1be726ef6813 added sort_wrt;
wenzelm
parents: 3874
diff changeset
   990
fun sort_wrt sel xs = sort (op <= o pairself (sel: 'a -> string)) xs;
1be726ef6813 added sort_wrt;
wenzelm
parents: 3874
diff changeset
   991
val sort_strings = sort_wrt I;
41
97aae241094b added cons, rcons, last_elem, sort_strings, take_suffix;
wenzelm
parents: 24
diff changeset
   992
97aae241094b added cons, rcons, last_elem, sort_strings, take_suffix;
wenzelm
parents: 24
diff changeset
   993
233
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   994
(* transitive closure (not Warshall's algorithm) *)
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   995
233
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   996
fun transitive_closure [] = []
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   997
  | transitive_closure ((x, ys)::ps) =
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
   998
      let val qs = transitive_closure ps
2182
29e56f003599 Removal of polymorphic equality via mem, subset, eq_set, etc
paulson
parents: 2175
diff changeset
   999
          val zs = foldl (fn (zs, y) => assocs qs y union_string zs) (ys, ys)
29e56f003599 Removal of polymorphic equality via mem, subset, eq_set, etc
paulson
parents: 2175
diff changeset
  1000
          fun step(u, us) = (u, if x mem_string us then zs union_string us 
2243
3ebeaaacfbd1 Eta-expanded some declarations that are illegal under value polymorphism
paulson
parents: 2196
diff changeset
  1001
                                else us)
233
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
  1002
      in (x, zs) :: map step qs end;
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1003
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1004
233
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
  1005
(* generating identifiers *)
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1006
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1007
local
233
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
  1008
  val a = ord "a" and z = ord "z" and A = ord "A" and Z = ord "Z"
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
  1009
  and k0 = ord "0" and k9 = ord "9"
2003
b48f066d52dc Addition of gensym
paulson
parents: 1628
diff changeset
  1010
2806
772f6bba48a1 gensym no longer generates random identifiers, but just enumerates them
paulson
parents: 2522
diff changeset
  1011
  val seedr = ref 0;
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1012
in
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1013
2003
b48f066d52dc Addition of gensym
paulson
parents: 1628
diff changeset
  1014
(*Maps 0-63 to A-Z, a-z, 0-9 or _ or ' for generating random identifiers*)
b48f066d52dc Addition of gensym
paulson
parents: 1628
diff changeset
  1015
fun newid n = 
b48f066d52dc Addition of gensym
paulson
parents: 1628
diff changeset
  1016
  let fun char i =
b48f066d52dc Addition of gensym
paulson
parents: 1628
diff changeset
  1017
               if i<26 then chr (A+i)
b48f066d52dc Addition of gensym
paulson
parents: 1628
diff changeset
  1018
          else if i<52 then chr (a+i-26)
b48f066d52dc Addition of gensym
paulson
parents: 1628
diff changeset
  1019
          else if i<62 then chr (k0+i-52)
b48f066d52dc Addition of gensym
paulson
parents: 1628
diff changeset
  1020
          else if i=62 then "_"
b48f066d52dc Addition of gensym
paulson
parents: 1628
diff changeset
  1021
          else  (*i=63*)    "'"
b48f066d52dc Addition of gensym
paulson
parents: 1628
diff changeset
  1022
  in  implode (map char (radixpand (64,n)))  end;
b48f066d52dc Addition of gensym
paulson
parents: 1628
diff changeset
  1023
2806
772f6bba48a1 gensym no longer generates random identifiers, but just enumerates them
paulson
parents: 2522
diff changeset
  1024
(*Freshly generated identifiers with given prefix; MUST start with a letter*)
2003
b48f066d52dc Addition of gensym
paulson
parents: 1628
diff changeset
  1025
fun gensym pre = pre ^ 
2806
772f6bba48a1 gensym no longer generates random identifiers, but just enumerates them
paulson
parents: 2522
diff changeset
  1026
                 (#1(newid (!seedr), 
772f6bba48a1 gensym no longer generates random identifiers, but just enumerates them
paulson
parents: 2522
diff changeset
  1027
                     seedr := 1+ !seedr))
2003
b48f066d52dc Addition of gensym
paulson
parents: 1628
diff changeset
  1028
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1029
(*Increment a list of letters like a reversed base 26 number.
233
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
  1030
  If head is "z", bumps chars in tail.
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1031
  Digits are incremented as if they were integers.
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1032
  "_" and "'" are not changed.
233
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
  1033
  For making variants of identifiers.*)
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1034
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1035
fun bump_int_list(c::cs) = if c="9" then "0" :: bump_int_list cs else
233
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
  1036
        if k0 <= ord(c) andalso ord(c) < k9 then chr(ord(c)+1) :: cs
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
  1037
        else "1" :: c :: cs
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1038
  | bump_int_list([]) = error("bump_int_list: not an identifier");
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1039
233
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
  1040
fun bump_list([], d) = [d]
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
  1041
  | bump_list(["'"], d) = [d, "'"]
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
  1042
  | bump_list("z"::cs, _) = "a" :: bump_list(cs, "a")
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
  1043
  | bump_list("Z"::cs, _) = "A" :: bump_list(cs, "A")
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
  1044
  | bump_list("9"::cs, _) = "0" :: bump_int_list cs
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
  1045
  | bump_list(c::cs, _) = let val k = ord(c)
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
  1046
        in if (a <= k andalso k < z) orelse (A <= k andalso k < Z) orelse
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
  1047
              (k0 <= k andalso k < k9) then chr(k+1) :: cs else
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
  1048
           if c="'" orelse c="_" then c :: bump_list(cs, "") else
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
  1049
                error("bump_list: not legal in identifier: " ^
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
  1050
                        implode(rev(c::cs)))
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
  1051
        end;
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1052
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1053
end;
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1054
233
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
  1055
fun bump_string s : string = implode (rev (bump_list(rev(explode s), "")));
41
97aae241094b added cons, rcons, last_elem, sort_strings, take_suffix;
wenzelm
parents: 24
diff changeset
  1056
97aae241094b added cons, rcons, last_elem, sort_strings, take_suffix;
wenzelm
parents: 24
diff changeset
  1057
233
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
  1058
(* lexical scanning *)
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1059
233
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
  1060
(*scan a list of characters into "words" composed of "letters" (recognized by
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
  1061
  is_let) and separated by any number of non-"letters"*)
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
  1062
fun scanwords is_let cs =
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
  1063
  let fun scan1 [] = []
233
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
  1064
        | scan1 cs =
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
  1065
            let val (lets, rest) = take_prefix is_let cs
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
  1066
            in implode lets :: scanwords is_let rest end;
efd6b4bb14dd major cleanup and reorganisation;
wenzelm
parents: 205
diff changeset
  1067
  in scan1 (#2 (take_prefix (not o is_let) cs)) end;
24
f3d4ff75d9f2 added functions that operate on filenames: split_filename (originally located
clasohm
parents: 0
diff changeset
  1068
1364
8ea1a962ad72 files now define a structure to allow SML/NJ to optimize the code
clasohm
parents: 1290
diff changeset
  1069
end;
8ea1a962ad72 files now define a structure to allow SML/NJ to optimize the code
clasohm
parents: 1290
diff changeset
  1070
1592
d89d5ff2397f maketest now closes the output file
paulson
parents: 1580
diff changeset
  1071
(*Variable-branching trees: for proof terms*)
d89d5ff2397f maketest now closes the output file
paulson
parents: 1580
diff changeset
  1072
datatype 'a mtree = Join of 'a * 'a mtree list;
d89d5ff2397f maketest now closes the output file
paulson
parents: 1580
diff changeset
  1073
1364
8ea1a962ad72 files now define a structure to allow SML/NJ to optimize the code
clasohm
parents: 1290
diff changeset
  1074
open Library;