author | wenzelm |
Wed, 26 Mar 2008 22:40:03 +0100 | |
changeset 26413 | 003dd6155870 |
parent 26393 | 42febbed5460 |
child 26654 | 1f711934f221 |
permissions | -rw-r--r-- |
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Environment of named facts (admits overriding). Optional indexing by proposition.
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(* Title: Pure/facts.ML |
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ID: $Id$ |
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Author: Makarius |
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Environment of named facts, optionally indexed by proposition. |
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*) |
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signature FACTS = |
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sig |
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val the_single: string -> thm list -> thm |
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datatype interval = FromTo of int * int | From of int | Single of int |
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datatype ref = |
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Named of (string * Position.T) * interval list option | |
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Fact of string |
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val named: string -> ref |
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val string_of_ref: ref -> string |
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val name_of_ref: ref -> string |
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val pos_of_ref: ref -> Position.T |
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val map_name_of_ref: (string -> string) -> ref -> ref |
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val select: ref -> thm list -> thm list |
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val selections: string * thm list -> (ref * thm) list |
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type T |
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val empty: T |
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val space_of: T -> NameSpace.T |
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val lookup: Context.generic -> T -> string -> thm list option |
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val dest: T -> (string * thm list) list |
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val extern: T -> (xstring * thm list) list |
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val props: T -> thm list |
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val could_unify: T -> term -> thm list |
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val merge: T * T -> T |
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val del: string -> T -> T |
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val add_global: NameSpace.naming -> string * thm list -> T -> T |
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val add_local: bool -> NameSpace.naming -> string * thm list -> T -> T |
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val add_dynamic: NameSpace.naming -> string * (Context.generic -> thm list) -> T -> T |
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end; |
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structure Facts: FACTS = |
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struct |
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(** fact references **) |
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fun the_single _ [th] : thm = th |
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| the_single name _ = error ("Single theorem expected " ^ quote name); |
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(* datatype interval *) |
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datatype interval = |
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FromTo of int * int | |
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From of int | |
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Single of int; |
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fun string_of_interval (FromTo (i, j)) = string_of_int i ^ "-" ^ string_of_int j |
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| string_of_interval (From i) = string_of_int i ^ "-" |
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| string_of_interval (Single i) = string_of_int i; |
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fun interval n iv = |
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let fun err () = raise Fail ("Bad interval specification " ^ string_of_interval iv) in |
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(case iv of |
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FromTo (i, j) => if i <= j then i upto j else err () |
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| From i => if i <= n then i upto n else err () |
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| Single i => [i]) |
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end; |
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(* datatype ref *) |
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datatype ref = |
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Named of (string * Position.T) * interval list option | |
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Fact of string; |
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fun named name = Named ((name, Position.none), NONE); |
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fun name_pos_of_ref (Named (name_pos, _)) = name_pos |
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| name_pos_of_ref (Fact _) = error "Illegal literal fact"; |
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val name_of_ref = #1 o name_pos_of_ref; |
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val pos_of_ref = #2 o name_pos_of_ref; |
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fun map_name_of_ref f (Named ((name, pos), is)) = Named ((f name, pos), is) |
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| map_name_of_ref _ r = r; |
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fun string_of_ref (Named ((name, _), NONE)) = name |
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| string_of_ref (Named ((name, _), SOME is)) = |
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name ^ enclose "(" ")" (commas (map string_of_interval is)) |
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| string_of_ref (Fact _) = error "Illegal literal fact"; |
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(* select *) |
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fun select (Fact _) ths = ths |
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| select (Named (_, NONE)) ths = ths |
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| select (Named ((name, pos), SOME ivs)) ths = |
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let |
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val n = length ths; |
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fun err msg = |
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error (msg ^ " for " ^ quote name ^ " (length " ^ string_of_int n ^ ")" ^ |
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Position.str_of pos); |
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fun sel i = |
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if i < 1 orelse i > n then err ("Bad subscript " ^ string_of_int i) |
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else nth ths (i - 1); |
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val is = maps (interval n) ivs handle Fail msg => err msg; |
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in map sel is end; |
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(* selections *) |
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fun selections (name, [th]) = [(Named ((name, Position.none), NONE), th)] |
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| selections (name, ths) = map2 (fn i => fn th => |
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(Named ((name, Position.none), SOME [Single i]), th)) (1 upto length ths) ths; |
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(** fact environment **) |
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(* datatypes *) |
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datatype fact = Static of thm list | Dynamic of Context.generic -> thm list; |
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datatype T = Facts of |
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{facts: (fact * serial) NameSpace.table, |
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props: thm Net.net}; |
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fun make_facts facts props = Facts {facts = facts, props = props}; |
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val empty = make_facts NameSpace.empty_table Net.empty; |
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(* named facts *) |
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fun facts_of (Facts {facts, ...}) = facts; |
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val space_of = #1 o facts_of; |
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val table_of = #2 o facts_of; |
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fun lookup context facts name = |
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(case Symtab.lookup (table_of facts) name of |
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NONE => NONE |
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| SOME (Static ths, _) => SOME ths |
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| SOME (Dynamic f, _) => SOME (f context)); |
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fun dest facts = |
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Symtab.fold (fn (name, (Static ths, _)) => cons (name, ths) | _ => I) (table_of facts) []; |
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fun extern facts = |
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dest facts |
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|> map (apfst (NameSpace.extern (space_of facts))) |
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|> sort_wrt #1; |
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(* indexed props *) |
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val prop_ord = Term.term_ord o pairself Thm.full_prop_of; |
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fun props (Facts {props, ...}) = sort_distinct prop_ord (Net.content props); |
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fun could_unify (Facts {props, ...}) = Net.unify_term props; |
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(* merge facts *) |
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fun err_dup_fact name = error ("Duplicate fact " ^ quote name); |
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fun merge (Facts {facts = facts1, props = props1}, Facts {facts = facts2, props = props2}) = |
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let |
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(* FIXME authentic version |
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val facts' = NameSpace.merge_tables (eq_snd (op =)) (facts1, facts2) |
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handle Symtab.DUP dup => err_dup_fact dup; *) |
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167 |
val facts' = NameSpace.merge_tables (K true) (facts1, facts2) |
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val props' = Net.merge (is_equal o prop_ord) (props1, props2); |
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169 |
in make_facts facts' props' end; |
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26393 | 171 |
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172 |
(* static entries *) |
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173 |
||
174 |
fun del name (Facts {facts = (space, tab), props}) = |
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175 |
let |
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176 |
val space' = NameSpace.hide true name space handle ERROR _ => space; |
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177 |
val tab' = Symtab.delete_safe name tab; |
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178 |
in make_facts (space', tab') props end; |
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179 |
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26307 | 180 |
fun add permissive do_props naming (name, ths) (Facts {facts, props}) = |
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Environment of named facts (admits overriding). Optional indexing by proposition.
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let |
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Environment of named facts (admits overriding). Optional indexing by proposition.
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182 |
val facts' = |
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Environment of named facts (admits overriding). Optional indexing by proposition.
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183 |
if name = "" then facts |
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Environment of named facts (admits overriding). Optional indexing by proposition.
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184 |
else |
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Environment of named facts (admits overriding). Optional indexing by proposition.
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185 |
let |
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Environment of named facts (admits overriding). Optional indexing by proposition.
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parents:
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186 |
val (space, tab) = facts; |
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Environment of named facts (admits overriding). Optional indexing by proposition.
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parents:
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changeset
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187 |
val space' = NameSpace.declare naming name space; |
26393 | 188 |
val entry = (name, (Static ths, serial ())); |
189 |
val tab' = (if permissive then Symtab.update else Symtab.update_new) entry tab |
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26307 | 190 |
handle Symtab.DUP dup => (legacy_feature ("Duplicate fact " ^ quote dup ^ |
191 |
Position.str_of (Position.thread_data ())); tab); |
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Environment of named facts (admits overriding). Optional indexing by proposition.
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parents:
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changeset
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192 |
in (space', tab') end; |
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Environment of named facts (admits overriding). Optional indexing by proposition.
wenzelm
parents:
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changeset
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193 |
val props' = |
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Environment of named facts (admits overriding). Optional indexing by proposition.
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parents:
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changeset
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194 |
if do_props then fold (fn th => Net.insert_term (K false) (Thm.full_prop_of th, th)) ths props |
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Environment of named facts (admits overriding). Optional indexing by proposition.
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parents:
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changeset
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195 |
else props; |
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Environment of named facts (admits overriding). Optional indexing by proposition.
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parents:
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changeset
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196 |
in make_facts facts' props' end; |
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Environment of named facts (admits overriding). Optional indexing by proposition.
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parents:
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changeset
|
197 |
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26307 | 198 |
val add_global = add false false; |
199 |
val add_local = add true; |
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200 |
||
26393 | 201 |
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202 |
(* dynamic entries *) |
|
203 |
||
204 |
fun add_dynamic naming (name, f) (Facts {facts = (space, tab), props}) = |
|
26290 | 205 |
let |
26393 | 206 |
val space' = NameSpace.declare naming name space; |
207 |
val entry = (name, (Dynamic f, serial ())); |
|
208 |
val tab' = Symtab.update_new entry tab |
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209 |
handle Symtab.DUP dup => err_dup_fact dup; |
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26290 | 210 |
in make_facts (space', tab') props end; |
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Environment of named facts (admits overriding). Optional indexing by proposition.
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parents:
diff
changeset
|
211 |
|
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Environment of named facts (admits overriding). Optional indexing by proposition.
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parents:
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changeset
|
212 |
end; |