author | blanchet |
Fri, 25 Jun 2010 16:27:53 +0200 | |
changeset 37575 | cfc5e281740f |
parent 37498 | b426cbdb5a23 |
child 37962 | d7dbe01f48d7 |
permissions | -rw-r--r-- |
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(* Title: HOL/Tools/Sledgehammer/sledgehammer_util.ML |
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Author: Jasmin Blanchette, TU Muenchen |
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General-purpose functions used by the Sledgehammer modules. |
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*) |
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signature SLEDGEHAMMER_UTIL = |
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sig |
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val plural_s : int -> string |
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val serial_commas : string -> string list -> string list |
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val timestamp : unit -> string |
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val parse_bool_option : bool -> string -> string -> bool option |
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val parse_time_option : string -> string -> Time.time option |
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val nat_subscript : int -> string |
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val unyxml : string -> string |
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val maybe_quote : string -> string |
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val monomorphic_term : Type.tyenv -> term -> term |
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val specialize_type : theory -> (string * typ) -> term -> term |
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end; |
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structure Sledgehammer_Util : SLEDGEHAMMER_UTIL = |
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struct |
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fun plural_s n = if n = 1 then "" else "s" |
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fun serial_commas _ [] = ["??"] |
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| serial_commas _ [s] = [s] |
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| serial_commas conj [s1, s2] = [s1, conj, s2] |
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| serial_commas conj [s1, s2, s3] = [s1 ^ ",", s2 ^ ",", conj, s3] |
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| serial_commas conj (s :: ss) = s ^ "," :: serial_commas conj ss |
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val timestamp = Date.fmt "%Y-%m-%d %H:%M:%S" o Date.fromTimeLocal o Time.now |
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fun parse_bool_option option name s = |
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(case s of |
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"smart" => if option then NONE else raise Option |
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| "false" => SOME false |
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| "true" => SOME true |
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| "" => SOME true |
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| _ => raise Option) |
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handle Option.Option => |
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let val ss = map quote ((option ? cons "smart") ["true", "false"]) in |
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error ("Parameter " ^ quote name ^ " must be assigned " ^ |
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space_implode " " (serial_commas "or" ss) ^ ".") |
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end |
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fun parse_time_option _ "none" = NONE |
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| parse_time_option name s = |
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let |
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val msecs = |
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case space_explode " " s of |
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[s1, "min"] => 60000 * the (Int.fromString s1) |
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| [s1, "s"] => 1000 * the (Int.fromString s1) |
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| [s1, "ms"] => the (Int.fromString s1) |
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| _ => 0 |
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in |
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if msecs <= 0 then |
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error ("Parameter " ^ quote name ^ " must be assigned a positive time \ |
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\value (e.g., \"60 s\", \"200 ms\") or \"none\".") |
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else |
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SOME (Time.fromMilliseconds msecs) |
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end |
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val subscript = implode o map (prefix "\<^isub>") o explode |
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fun nat_subscript n = |
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n |> string_of_int |> print_mode_active Symbol.xsymbolsN ? subscript |
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fun plain_string_from_xml_tree t = |
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Buffer.empty |> XML.add_content t |> Buffer.content |
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val unyxml = plain_string_from_xml_tree o YXML.parse |
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val is_long_identifier = forall Syntax.is_identifier o space_explode "." |
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fun maybe_quote y = |
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let val s = unyxml y in |
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y |> ((not (is_long_identifier (perhaps (try (unprefix "'")) s)) andalso |
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not (is_long_identifier (perhaps (try (unprefix "?")) s))) orelse |
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Keyword.is_keyword s) ? quote |
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end |
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fun monomorphic_term subst t = |
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map_types (map_type_tvar (fn v => |
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case Type.lookup subst v of |
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SOME typ => typ |
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| NONE => raise TERM ("monomorphic_term: uninstanitated schematic type \ |
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\variable", [t]))) t |
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fun specialize_type thy (s, T) t = |
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let |
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fun subst_for (Const (s', T')) = |
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if s = s' then |
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SOME (Sign.typ_match thy (T', T) Vartab.empty) |
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handle Type.TYPE_MATCH => NONE |
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else |
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NONE |
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| subst_for (t1 $ t2) = |
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(case subst_for t1 of SOME x => SOME x | NONE => subst_for t2) |
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| subst_for (Abs (_, _, t')) = subst_for t' |
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| subst_for _ = NONE |
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in |
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case subst_for t of |
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SOME subst => monomorphic_term subst t |
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| NONE => raise Type.TYPE_MATCH |
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end |
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end; |